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32 results on '"V.V. Anashin"'

1. First Experimental Data on a New SR Beamline of the VEPP-2000 Complex for the HL-LHC Vacuum System

Author

D. B. Shwartz, A. A. Zharikov, A. A. Krasnov, G. A. Fatkin, V.V. Anashin, and A. M. Semenov

Subjects
010302 applied physics, Luminosity (scattering theory), Materials science, Large Hadron Collider, Physics::Instrumentation and Detectors, Synchrotron radiation, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Synchrotron, Surfaces, Coatings and Films, law.invention, Nuclear physics, Amorphous carbon, Beamline, law, Secondary emission, 0103 physical sciences, Physics::Accelerator Physics, 0210 nano-technology, VEPP-2000
Abstract

In the framework of the large hadron collider (LHC) upgrade project, new materials are proposed for the vacuum. Amorphous carbon deposited onto the vacuum-chamber wall is examined as a coating with a low secondary electron emission rate for superconducting systems designed to upgrade the LHC, i.e., to increase the luminosity of the machine (HL-LHC). Since protons will generate synchrotron radiation with a critical energy of ~10 eV and a flux of 1016 photon m–1 s–1, it is important to study the effect of photons on a surface covered with amorphous carbon at room and cryogenic temperatures. The construction and parameters of the setup on the new synchrotron beamline of the VEPP-2000 booster are described. The first results of measuring the photodesorption coefficient are also presented.

Published
2020
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2. Development of sputter ion pump with strong magnetic field for obtaining of ultra-high vacuum

Author

A. Krasnov, A. M. Semenov, and V.V. Anashin

Subjects
Materials science, Argon, Physics::Instrumentation and Detectors, business.industry, Ultra-high vacuum, Physics::Optics, chemistry.chemical_element, Synchrotron, law.invention, chemistry, Ion pump, Physics::Plasma Physics, Sputtering, Getter, law, Torr, Optoelectronics, business, Diode
Abstract

It is required an ultra-high vacuum (near 1E-11 Torr in the beam absence mode) in the synchrotron source of 4th generation SFR “SKIF”. Owing to the vacuum chambers have small molecular conductivity and the space limitation for pumps location, compact combined pumps application is required, i.e. pump on the base of non-evaporable getter and sputter ion pump. The modern pumps NEXTorr (SAES Getters, Italy) are not implemented the all of requirements on argon and methane for SFR “SKIF”. Therefore, it is necessary to create similar combined pumps by Russian manufacture. The first theoretical pumping speed calculations for one cell of diode type sputter ion pump and the whole of sputter ion pump are presented here. Also experimental results of pumping speed measurements depending on the magnetic field, diameter and length of cell for sputter ion pump are given.

Published
2020
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3. Measurement of Ruds and R between 3.12 and 3.72 GeV at the KEDR detector

Author

V.A. Tayursky, G.A. Savinov, G.V. Karpov, V.F. Kulikov, A. E. Blinov, A.I. Vorobiov, Tatyana Kharlamova, D.A. Maksimov, N. Yu. Muchnoi, I.B. Nikolaev, A.A. Osipov, E.A. Kuper, V.G. Prisekin, I. A. Kuyanov, V.M. Aulchenko, E. A. Simonov, V. S. Bobrovnikov, M.Yu. Barnyakov, S.A. Nikitin, V. A. Kiselev, V.V. Kolmogorov, Alexey Talyshev, A.M. Sukharev, A.N. Skrinsky, S.E. Baru, V. Kudryavtsev, A.K. Barladyan, S.B. Oreshkin, S.I. Eidelman, S.A. Kononov, Sergey Karnaev, A. P. Onuchin, Yu. A. Tikhonov, Yu.M. Glukhovchenko, Sergey Peleganchuk, Yu. V. Usov, V.V. Anashin, A.A. Borodenko, K.Yu. Kotov, I.N. Okunev, D.N. Grigoriev, I.Yu. Basok, I.V. Ovtin, A.A. Ruban, Evgeny Levichev, A.N. Zhuravlev, A.Yu. Barnyakov, I.I. Morozov, V.K. Sandyrev, G.Ya. Kurkin, A.E. Bondar, S.V. Karpov, Dmitry Shatilov, Evgenii Baldin, Alexey Buzykaev, Valery I. Telnov, B.A. Shwartz, Vladimir Blinov, A.V. Bogomyagkov, P.V. Kasyanenko, S.G. Pivovarov, A.G. Shamov, K. Yu. Todyshev, Vladimir Zhulanov, Sergey Sinyatkin, Pavel Piminov, S. I. Mishnev, A.M. Batrakov, G.M. Tumaikin, V.N. Zhilich, Oleg Meshkov, Andrey Sokolov, E.V. Starostina, V.V. Neufeld, V. M. Malyshev, A. Bobrov, V. V. Petrov, Olga Rezanova, E. A. Kravchenko, and Alexey Maslennikov

Subjects
Physics, Systematic error, Particle physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Electron–positron annihilation, Detector, FOS: Physical sciences, 01 natural sciences, lcsh:QC1-999, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, 010306 general physics, Collider, lcsh:Physics
Abstract

Using the KEDR detector at the VEPP-4M e + e − e + e − collider, we have measured the values of R uds R uds and R at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than 3.3% 3.3 % at most of energy points with a systematic uncertainty of about 2.1% 2.1 % . At the moment it is the most accurate measurement of R(s) R ( s ) in this energy range.

Published
2016

4. Precise measurement of And between 1.84 and 3.72 GeV at the KEDR detector

Author

D.P. Kashtankin, S.I. Eidelman, A.K. Barladyan, I.Yu. Basok, V.V. Anashin, Evgeny Levichev, V.M. Aulchenko, Tatyana Kharlamova, K.Yu. Kotov, A.M. Batrakov, V.A. Tayursky, D.N. Grigoriev, A.E. Bondar, Evgenii Baldin, Alexey Buzykaev, K. Yu. Todyshev, G.A. Savinov, A.N. Skrinsky, V. Kudryavtsev, E. A. Kravchenko, P.V. Kasyanenko, E. A. Simonov, D.A. Shvedov, V.L. Dorohov, S.A. Nikitin, I. A. Kuyanov, V. A. Kiselev, Yu. A. Tikhonov, Sergey Peleganchuk, V.F. Kulikov, M.Yu. Barnyakov, Alexey Maslennikov, Sergey Sinyatkin, V.G. Prisekin, O.V. Anchugov, V. V. Kaminskiy, A.N. Zhuravlev, V. S. Bobrovnikov, Pavel Piminov, A.G. Tribendis, S.E. Baru, A.A. Zhukov, E.A. Bekhtenev, Olga Rezanova, Vladimir Blinov, B.A. Shwartz, I.A. Morozov, S.A. Kononov, A. P. Onuchin, S.B. Oreshkin, G.N. Baranov, E.V. Starostina, Yu. V. Usov, A.Yu. Barnyakov, V.V. Kolmogorov, A.A. Krasnov, I.N. Okunev, Vladimir Zhulanov, G.Ya. Kurkin, V. V. Petrov, S.G. Pivovarov, Alexey Talyshev, A.G. Shamov, A.M. Sukharev, I. B. Nikolaev, G.V. Karpov, A.V. Bogomyagkov, A.I. Vorobiov, A. Bobrov, I.I. Morozov, K.Yu. Karukina, Dmitry Shatilov, Andrey Sokolov, Valery I. Telnov, S.V. Karpov, D.A. Maksimov, Sergey Karnaev, S.A. Glukhov, V. M. Malyshev, P.B. Cheblakov, A.A. Ruban, D.P. Sukhanov, S. I. Mishnev, G.M. Tumaikin, A. E. Blinov, A.A. Osipov, V.N. Zhilich, Oleg Meshkov, and I.V. Ovtin

Subjects
Systematic error, Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Detector, Monte Carlo method, FOS: Physical sciences, 01 natural sciences, R-value (insulation), lcsh:QC1-999, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, 010306 general physics, Collider, lcsh:Physics
Abstract

The present work continues a series of the KEDR measurements of the $R$ value that started in 2010 at the VEPP-4M $e^+e^-$ collider. By combining new data with our previous results in this energy range we measured the values of $R_{\text{uds}}$ and $R$ at nine center-of-mass energies between 3.08 and 3.72 GeV. The total accuracy is about or better than $2.6\%$ at most of energy points with a systematic uncertainty of about $1.9\%$. Together with the previous precise $R$ measurement at KEDR in the energy range 1.84-3.05 GeV, it constitutes the most detailed high-precision $R$ measurement near the charmonium production threshold., arXiv admin note: text overlap with arXiv:1610.02827 and substantial text overlap with arXiv:1510.02667

Published
2018

5. Nsls-II Boster

Author

P. Zuhoski, M. Johanson, V.E. Akimov, A. S. Medvedko, V. V. Kolmogorov, Stanislav Serednyakov, A. N. Zhuravlev, P.D. Vobly, K. R. Yaminov, Sergey Sinyatkin, S.L. Kramer, M. Davidsavier, J. De Long, Y. Tian, William Wahl, V. V. Petrov, A. M. Semenov, N.V. Sazonov, A.A. Kremnev, D. B. Burenkov, A. I. Erokhin, D. S. Gurov, Hsiao-Chaun Hseuh, V. A. Kiselev, R.A. Kadyrov, N. B. Nefedov, V. Kuzminykh, Oleg Meshkov, V.G. Cheskidov, Timur Shaftan, V.V. Kobets, E.P. Semenov, A. V. Polyansky, James Rose, A. V. Akimov, V.V. Neyfeld, L.E. Serdakov, Eric Blum, M. V. Petrichenkov, G. Ganetis, Satoshi Ozaki, D. S. Shichkov, Y. Hu, Anton Derbenev, Y. Li, V.R. Mamkin, D.V. Senkov, F. Gao, M. Fulkerson, A.V. Makeev, T.V. Rybitskaya, Danny Padrazo, A. R. Rakhimov, E.A. Kuper, E. A. Simonov, G. Wang, V.V. Anashin, A.V. Sukhanov, A. V. Philipchenko, A.V. Bulatov, A.A. Krasnov, R.V. Vakhrushev, K. M. Gorchakov, A.M. Batrakov, D.N. Pureskin, Sergey Karnaev, O. Singh, A.D. Chernyakin, G. V. Karpov, F. Willeke, Leonid Schegolev, L.A. Tsukanova, Raymond Fliller, I.N. Churkin, S.M. Gurov, Victor Smaluk, Evgeny Levichev, A.A. Korepanov, O. V. Anchugov, Pavel Cheblakov, S. I. Ruvinskiy, S.V. Shiyankov, G.N. Baranov, O.V. Belikov, A.V. Utkin, I.N. Okunev, Evgeny Bekhtenev, H. Yong, D. A. Shvedov, S. Sharma, and V.M. Konstantinov

Subjects
Physics, 010308 nuclear & particles physics, Synchrotron radiation, General Medicine, Physics and Astronomy(all), 01 natural sciences, Synchrotron, Third generation, Linear particle accelerator, law.invention, Nuclear physics, Light source, law, Booster (electric power), 0103 physical sciences, National Synchrotron Light Source II, 010306 general physics, National laboratory
Abstract

The National Synchrotron Light Source II is a third generation light source, which was constructed at Brookhaven National Laboratory. This project includes a highly-optimized 3 GeV electron storage ring, linac preinjector, and full-energy synchrotron injector. Budker Institute of Nuclear Physics built and delivered the booster for NSLS-II. The commissioning of the booster was successfully completed. This paper reviews fulfilled work by participants.

Published
2016
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6. Final analysis of KEDR data onJ/ψandψ(2S)masses

Author

A.A. Borodenko, I.I. Morozov, G.M. Tumaikin, V.V. Kolmogorov, Dmitry Shatilov, A.N. Zhuravlev, V.A. Tayursky, G.A. Savinov, A.E. Bondar, Alexey Talyshev, A.M. Sukharev, S.V. Karpov, Evgenii Baldin, A.M. Batrakov, V.N. Zhilich, Alexey Buzykaev, Oleg Meshkov, Andrey Sokolov, Yu. V. Usov, V.F. Kulikov, A. E. Blinov, Alexey Maslennikov, S.B. Oreshkin, S. I. Mishnev, A.A. Osipov, V. S. Bobrovnikov, V. A. Kiselev, N. Yu. Muchnoi, I.B. Nikolaev, Olga Rezanova, Yu.M. Glukhovchenko, Vladimir Blinov, K.Yu. Kotov, D.N. Grigoriev, V.G. Prisekin, S.G. Pivovarov, A.G. Shamov, B.A. Shwartz, E.V. Starostina, A.K. Barladyan, I.N. Okunev, Vladimir Zhulanov, V.V. Neufeld, S.I. Eidelman, I.V. Ovtin, A. Bobrov, D.A. Maksimov, A.Yu. Barnyakov, S.E. Baru, V.V. Anashin, A.V. Bogomyagkov, V.K. Sandyrev, V. M. Malyshev, V.M. Aulchenko, I. A. Kuyanov, Sergey Sinyatkin, Sergey Karnaev, Pavel Piminov, A. P. Onuchin, M.Yu. Barnyakov, A.A. Ruban, E. A. Simonov, S.A. Nikitin, Evgeny Levichev, Yu. A. Tikhonov, E. A. Kravchenko, V. V. Petrov, K. Yu. Todyshev, G.Ya. Kurkin, I.Yu. Basok, Tatyana Kharlamova, A.N. Skrinsky, V. Kudryavtsev, Sergey Peleganchuk, G.V. Karpov, A.I. Vorobiov, Valery I. Telnov, E.A. Kuper, and S.A. Kononov

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, law, Electron–positron annihilation, Resonance, Collider, Beam energy, law.invention
Abstract

We present the analysis of all KEDR data on the determination of J / ψ and ψ ( 2 S ) masses. The data comprise six scans of J / ψ and seven scans of ψ ( 2 S ) which were performed at the VEPP-4M e + e − collider in 2002–2008. The beam energy was determined using the resonance depolarization method. The detector and accelerator conditions during scans were very different that increases the reliability of the averaged results. The analysis accounts for partial correlations of systematic uncertainties on the masses. The following mass values were obtained: M J / ψ = 3096.900 ± 0.002 ± 0.006 MeV , M ψ ( 2 S ) = 3686.099 ± 0.004 ± 0.009 MeV . These results supersede our previous measurements published in 2003 and 2012.

Published
2015
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7. Recomissioning and Perspectives of VEPP-2000 e+e- Collider

Author

I. K. Sedlyarov, G. Yu. Kurkin, Yu. M. Shatunov, P. Yu. Shatunov, Fedor Emanov, Vasiliy Prosvetov, Dmitry Shwartz, Aleksey Semenov, Yu. A. Rogovsky, A. I. Senchenko, Dmitrii Rabusov, I. Mikheev, A. S. Kasaev, A.M. Batrakov, Oleg Belikov, Konstantin Gorchakov, A.A. Krasnov, Yu. M. Zharinov, Kseniya Astrelina, V.V. Anashin, Sergey Motygin, A. G. Tribendis, A. N. Kirpotin, A. P. Lysenko, Anatoliy Frolov, Danila Nikiforov, Ivan Koop, Alexey Andrianov, Dmitry Berkaev, Ilya Zemlyansky, A. Kenzhbulatov, Mikhail Blinov, and V. Raschenko

Subjects
Physics, Range (particle radiation), Particle physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, law.invention, Nuclear physics, Upgrade, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, VEPP-2000, Booster synchrotron, Beam (structure)
Abstract

VEPP-2000 is electron-positron collider exploiting the novel concept of round colliding beams. After three seasons of data taking in the whole energy range of 160-1000 MeV per beam it was stopped in 2013 for injection chain upgrade. The linking to the new BINP source of intensive beams together with booster synchrotron modernization provides the drastic luminosity gain at top energy of VEPP-2000.

Published
2017
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8. Measurement of J/ψ→γηc decay rate and ηc parameters at KEDR

Author

A. N. Yushkov, A.A. Osipov, S. I. Mishnev, A. P. Onuchin, Vladimir Blinov, V.M. Aulchenko, A.K. Barladyan, A.N. Zhuravlev, Sergey Peleganchuk, M.Yu. Barnyakov, G.A. Savinov, E.V. Starostina, Alexey Maslennikov, E.A. Kuper, Anton Poluektov, V.V. Anashin, Alexey Talyshev, V.V. Neufeld, V.V. Gulevich, V.G. Prisekin, A.Yu. Barnyakov, Olga Rezanova, E. A. Kravchenko, A.N. Skrinsky, I. Bedny, N. Yu. Muchnoi, D. A. Maksimov, V.K. Sandyrev, I.B. Nikolaev, A.E. Bondar, A.S. Medvedko, S.V. Karpov, A.V. Bogomyagkov, Evgenii Baldin, I.Yu. Basok, Yu. V. Usov, A. Sokolov, V. M. Malyshev, G.M. Tumaikin, I.I. Morozov, Yu.M. Glukhovchenko, V.N. Zhilich, V. V. Petrov, Oleg Meshkov, S.I. Eidelman, Dmitry Shatilov, A.A. Ruban, A. Bobrov, B.A. Shwartz, S.B. Oreshkin, Victor Bobrovnikov, Vladimir Zhulanov, V.F. Kulikov, A.M. Sukharev, Tatyana Kharlamova, S.G. Pivovarov, A.G. Shamov, A. E. Blinov, V.A. Tayursky, K.Yu. Kotov, I.N. Okunev, V. A. Kiselev, D. V. Gusev, A. R. Buzykaev, S.E. Baru, S.A. Kononov, G.Ya. Kurkin, G.V. Karpov, Evgeny Levichev, A.I. Vorobiov, Valery I. Telnov, E. A. Simonov, S.A. Nikitin, Victor Smaluk, Yu. A. Tikhonov, I.O. Orlov, Sergey Sinyatkin, Pavel Piminov, G. E. Pospelov, K. Yu. Todyshev, and Sergey Karnaev

Subjects
Physics, Nuclear and High Energy Physics, Photon, law, Electron–positron annihilation, Detector, Radiative decay, Atomic physics, Collider, law.invention
Abstract

Using the inclusive photon spectrum based on a data sample collected at the J / ψ peak with the KEDR detector at the VEPP-4M e + e − collider, we measured the rate of the radiative decay J / ψ → γ η c as well as η c mass and width. Taking into account an asymmetric photon lineshape we obtained Γ γ η c 0 = 2.98 ± 0.18 − 0.33 + 0.15 keV , M η c = 2983.5 ± 1.4 − 3.6 + 1.6 MeV / c 2 , Γ η c = 27.2 ± 3.1 − 2.6 + 5.4 MeV .

Published
2014
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9. Performance of the vacuum system for the PETRA III damping wiggler section

Author

V. Kuzminykh, Evgeny Levichev, A.A. Zhukov, B Nagorny, K. Zapfe, A.A. Krasnov, H.-P. Wedekind, Yu. Pupkov, A. M. Semenov, V.V. Anashin, G. Gusev, K. Zolotarev, M. Tischer, Victor Smaluk, E.V. Abakumova, R. Boespflug, and K. Balewski

Subjects
Physics, business.industry, Wiggler, Synchrotron radiation, Particle accelerator, Synchrotron light source, Radiation, Condensed Matter Physics, Surfaces, Coatings and Films, law.invention, Optics, law, Section (archaeology), Magnet, Thermal emittance, business, Instrumentation
Abstract

A record low horizontal emittance of 1 nm-rad was successfully obtained in PETRA III third generation synchrotron light source. A key system that allowed reaching such value includes 20 permanent magnet damping wigglers installed in two long straight sections. The wigglers radiate almost 1 MW at maximum current of hard X-ray radiation which issues a challenge for the design of SR absorbers and vacuum system components for the damping wiggler section. The paper describes in detail the design consideration, manufacturing and experimental performance of absorbers and vacuum system. The first experimental results of PETRA III damping wiggler section operation are presented.

Published
2012
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10. Search for narrow resonances in e+e− annihilation between 1.85 and 3.1 GeV with the KEDR detector

Author

S.G. Pivovarov, A.G. Shamov, V. V. Petrov, D.N. Grigoriev, V. E. Blinov, S.I. Eidelman, Yu.M. Glukhovchenko, D. V. Gusev, Tatyana Kharlamova, V.F. Kulikov, V.N. Zhilich, V.M. Aulchenko, Oleg Meshkov, A.N. Zhuravlev, A.K. Barladyan, V.V. Gulevich, G.M. Tumaikin, A.V. Bogomyagkov, V.V. Anashin, V. M. Malyshev, A. N. Yushkov, Sergey Peleganchuk, A. Bobrov, G.A. Savinov, E. A. Kravchenko, Sergey Karnaev, D. A. Maksimov, S.B. Oreshkin, K.Yu. Kotov, S.E. Baru, Valery I. Telnov, O. L. Beloborodova, A.A. Ruban, V. A. Kiselev, V.K. Sandyrev, A.E. Bondar, E.A. Kuper, N. Yu. Muchnoi, I.B. Nikolaev, S.V. Karpov, Evgenii Baldin, B.A. Shwartz, A. Sokolov, S.A. Kononov, A. Yu. Barnyakov, A.N. Skrinsky, V. Kudryavtsev, A.A. Osipov, S. I. Mishnev, A. P. Onuchin, M.Yu. Barnyakov, Vladimir Zhulanov, Yu. V. Usov, I.N. Okunev, K. Yu. Todyshev, E.V. Starostina, V.V. Neufeld, V.V. Kolmogorov, Alexey Talyshev, A.S. Medvedko, I.Yu. Basok, I.I. Morozov, Anton Poluektov, Alexey Maslennikov, Dmitry Shatilov, Victor Smaluk, V.G. Prisekin, I.O. Orlov, Sergey Sinyatkin, Pavel Piminov, A. E. Blinov, E. A. Simonov, S.A. Nikitin, Yu. A. Tikhonov, A. R. Buzykaev, Victor Bobrovnikov, V.A. Tayursky, G.V. Karpov, A.I. Vorobiov, Evgeny Levichev, G.Ya. Kurkin, and A.M. Sukharev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, law, Electron–positron annihilation, Detector, Resonance, High Energy Physics::Experiment, Collider, law.invention
Abstract

We report results of a search for narrow resonances in e + e − annihilation at center-of-mass energies between 1.85 and 3.1 GeV performed with the KEDR detector at the VEPP-4M e + e − collider. The upper limit on the leptonic width of a narrow resonance Γ e e R ⋅ Br ( R → h a d r ) 120 eV has been obtained (at 90% C.L.).

Published
2011
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11. τ lepton mass determination at KEDR

Author

Yu. I. Skovpen, Andrey Sokolov, E. A. Kravchenko, S.I. Eidelman, G.V. Karpov, A.N. Zhuravlev, N. Yu. Muchnoi, E.A. Kuper, S.A. Kononov, S.V. Karpov, A. N. Yushkov, Valery I. Telnov, V. V. Petrov, A.A. Ruban, D. A. Maksimov, V. A. Kiselev, A.E. Bondar, Alexey Talyshev, A. I. Vorobiov, V.V. Neufeld, Evgenii Baldin, M.Yu. Barnyakov, G.A. Savinov, I. B. Nikolaev, I.N. Okunev, I.O. Orlov, Sergey Sinyatkin, Alexey Maslennikov, Victor Bobrovnikov, V.V. Gulevich, Yu.M. Glukhovchenko, Yu. V. Usov, G.Ya. Kurkin, S.B. Oreshkin, Anton Poluektov, V.N. Zhilich, V. M. Malyshev, Oleg Meshkov, V.K. Sandyrev, Pavel Piminov, A. E. Blinov, Victor Smaluk, A.K. Barladyan, A.G. Shamov, B.A. Shwartz, A. R. Buzykaev, V.G. Prisekin, Vladimir Zhulanov, V.V. Anashin, I.I. Morozov, A. Yu. Barnyakov, Dmitry Shatilov, A.A. Osipov, E. A. Simonov, S. I. Mishnev, A. P. Onuchin, S.A. Nikitin, E. V. Starostina, Tatyana Kharlamova, Sergey Karnaev, I. Bedny, Yu. A. Tikhonov, G.M. Tumaikin, V. E. Blinov, G. E. Pospelov, K. Yu. Todyshev, A.V. Bogomyagkov, Evgeny Levichev, S.E. Baru, A.M. Sukharev, K.Yu. Kotov, D. V. Gusev, O. L. Beloborodova, V.A. Tayursky, S. G. Pivovarov, V.F. Kulikov, A.S. Medvedko, I.Yu. Basok, A. Bobrov, A.N. Skrinsky, Sergey Peleganchuk, and V.M. Aulchenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Detector, Atomic and Molecular Physics, and Optics, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, Lepton
Abstract

We present preliminary results of a new high-precision determination of the τ lepton mass performed with the KEDR detector at the VEPP-4M e + e − collider. These results are compared to two recent τ lepton mass measurements at Belle and BaBar.

Published
2011
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12. MEASUREMENT OF $\mathcal{B}(J/\psi\to \eta_{{\rm c}}\gamma)$ AT KEDR

Author

E. A. Kravchenko, Anton Poluektov, V.G. Prisekin, S.A. Kononov, K. Yu Todyshev, S.G. Pivovarov, Yu.M. Glukhovchenko, Yu. I. Skovpen, V.N. Zhilich, Oleg Meshkov, Valery I. Telnov, I.N. Okunev, A. Yu. Barnyakov, A. S. Medvedko, E.A. Kuper, E. A. Simonov, V. F. Kulikov, V. V. Petrov, A.A. Osipov, V.K. Sandyrev, A. I. Milstein, S. I. Mishnev, A. P. Onuchin, G.Ya. Kurkin, V. E. Blinov, G. V. Karpov, Evgeny Levichev, S.A. Nikitin, S.I. Eidelman, Yu. A. Tikhonov, A.G. Shamov, Yu. V. Usov, N. Yu. Muchnoi, A. Bobrov, A.E. Bondar, M.Yu. Barnyakov, Evgenii Baldin, D. A. Maksimov, Alexey Maslennikov, V. A. Kiselev, V. A. Tayursky, Sergey Peleganchuk, A.N. Skrinsky, G. E. Pospelov, A. I. Vorobiov, A. E. Blinov, A.A. Ruban, A. R. Buzykaev, Dmitry Shatilov, I. Bedny, I. B. Nikolaev, D. V. Gusev, S.E. Baru, Victor Smaluk, V. V. Gulevich, A.K. Barladyan, A. N. Yushkov, Sergey Sinyatkin, S.V. Karpov, Pavel Piminov, B.A. Shwartz, V. M. Aulchenko, A.M. Sukharev, V.V. Anashin, G.A. Savinov, S.B. Oreshkin, A. N. Zhuravlev, G.M. Tumaikin, A. V. Bogomyagkov, K.Yu. Kotov, I. I. Morozov, I. O. Orlov, Tatyana Kharlamova, O. L. Beloborodova, Vladimir Zhulanov, I.Yu. Basok, Sergey Karnaev, Alexey Talyshev, Andrey Sokolov, V. M. Malyshev, E.V. Starostina, V.V. Neufeld, and V. S. Bobrovnikov

Subjects
Physics, Particle physics, Photon, Branching fraction, law, Radiative decay, Analytical chemistry, Collider, law.invention
Abstract

We present a study of the inclusive photon spectrum from 6.3 million J/ψ decays collected with the KEDR detector at the VEPP-4M e+e- collider. We measure the branching fraction of the radiative decay J/ψ → ηcγ, ηc width and mass. Taking into account an asymmetric photon line shape we obtain: Mηc = (2978.1 ± 1.4 ± 2.0) MeV/c2, Γηc = (43.5 ± 5.4 ± 15.8) MeV, [Formula: see text].

Published
2011
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13. Measurement of D0 and D+ meson masses with the KEDR detector

Author

Oleg Meshkov, G.Ya. Kurkin, K.Yu. Kotov, Anton Poluektov, A. R. Buzykaev, I. N. Popkov, E. A. Kravchenko, V.G. Prisekin, D. A. Maksimov, O. L. Beloborodova, Valery I. Telnov, V. E. Blinov, I.O. Orlov, Sergey Sinyatkin, E.A. Kuper, S.E. Baru, V. M. Malyshev, V.F. Kulikov, V.M. Aulchenko, A.M. Sukharev, Pavel Piminov, A. E. Blinov, G.A. Savinov, E.V. Starostina, M.Yu. Barnyakov, A.N. Zhuravlev, A.S. Medvedko, Victor Smaluk, V. V. Petrov, V.K. Sandyrev, S.A. Kononov, A.V. Bogomyagkov, Yu. V. Usov, V.V. Neufeld, E. A. Simonov, A. Yu. Barnyakov, V.A. Tayursky, S.A. Nikitin, A.A. Osipov, S. I. Mishnev, A.K. Barladyan, Sergey Peleganchuk, I.I. Morozov, S.I. Eidelman, A. P. Onuchin, Yu. I. Skovpen, A. Bobrov, Yu. A. Tikhonov, V.V. Gulevich, D.V. Bondarev, A.A. Ruban, Alexey Maslennikov, G.V. Karpov, V.V. Anashin, N. Yu. Muchnoi, I. Bedny, I.B. Nikolaev, Dmitry Shatilov, A.E. Bondar, A.N. Skrinsky, A.I. Vorobiov, Tatyana Kharlamova, S.V. Karpov, Evgenii Baldin, Evgeny Levichev, S.G. Pivovarov, G.M. Tumaikin, A. Sokolov, K. Yu. Todyshev, A.G. Shamov, A. N. Yushkov, Victor Bobrovnikov, Sergey Karnaev, D. V. Gusev, S.B. Oreshkin, Alexey Talyshev, B.A. Shwartz, Vladimir Zhulanov, Yu.M. Glukhovchenko, I.N. Okunev, V. A. Kiselev, and V.N. Zhilich

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, Nuclear Theory, Detector, law.invention, Nuclear physics, Positron, law, D meson, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Collider, Astrophysics::Galaxy Astrophysics, X(3872)
Abstract

The masses of the neutral and charged D mesons have been measured with the KEDR detector at the VEPP-4M electron–positron collider: M D 0 = 1865.30 ± 0.33 ± 0.23 MeV , M D + = 1869.53 ± 0.49 ± 0.20 MeV .

Published
2010
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14. Measurement of $R$ between 1.84 and 3.05 GeV at the KEDR detector

Author

Olga Rezanova, Alexey Maslennikov, A. Bobrov, K.Yu. Kotov, V. V. Petrov, A.K. Barladyan, A.N. Zhuravlev, N. Yu. Muchnoi, D.N. Grigoriev, V.M. Aulchenko, Yu. V. Usov, V.V. Anashin, V. S. Bobrovnikov, V.N. Zhilich, A.E. Bondar, Oleg Meshkov, A.Yu. Barnyakov, S.V. Karpov, Evgenii Baldin, S. I. Mishnev, I.I. Morozov, Alexey Buzykaev, Valery I. Telnov, G.Ya. Kurkin, V.F. Kulikov, Vladimir Blinov, E.A. Kuper, E. A. Kravchenko, P.V. Kasyanenko, Dmitry Shatilov, A.V. Bogomyagkov, V.A. Tayursky, V.K. Sandyrev, Evgeny Levichev, G.A. Savinov, V.G. Prisekin, S.G. Pivovarov, A.G. Shamov, G.M. Tumaikin, S.E. Baru, S.B. Oreshkin, S.I. Eidelman, A. E. Blinov, S.A. Kononov, V.V. Kolmogorov, A.A. Osipov, A. P. Onuchin, G.V. Karpov, A.I. Vorobiov, I.V. Ovtin, I. A. Kuyanov, M.Yu. Barnyakov, Sergey Peleganchuk, Tatyana Kharlamova, A.N. Skrinsky, V. Kudryavtsev, I.Yu. Basok, I.N. Okunev, V. A. Kiselev, K. Yu. Todyshev, Sergey Sinyatkin, Pavel Piminov, E. A. Simonov, S.A. Nikitin, Yu. A. Tikhonov, V. M. Malyshev, E.V. Starostina, V.V. Neufeld, Andrey Sokolov, D.A. Maksimov, A.A. Ruban, Sergey Karnaev, A.M. Batrakov, Yu.M. Glukhovchenko, Alexey Talyshev, A.M. Sukharev, I. B. Nikolaev, B.A. Shwartz, and Vladimir Zhulanov

Subjects
Physics, Systematic error, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Detector, FOS: Physical sciences, 01 natural sciences, lcsh:QC1-999, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, 010306 general physics, Collider, lcsh:Physics, Energy (signal processing)
Abstract

Using the KEDR detector at the VEPP-4M e + e − collider, we have determined the values of R at thirteen points of the center-of-mass energy between 1.84 and 3.05 GeV. The achieved accuracy is about or better than 3.9 % at most of the energy points with a systematic uncertainty less than 2.4 % .

Published
2016
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15. New precise determination of the τ lepton mass at KEDR detector

Author

V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.V. Bedny, O.L. Beloborodova, A.E. Blinov, V.E. Blinov, A.B. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, D.V. Bondarev, A.R. Buzykaev, V.P. Cherepanov, S.I. Eidelman, Yu.M. Glukhovchenko, V.V. Gulevich, S.E. Karnaev, G.V. Karpov, S.V. Karpov, V.A. Kiselev, S.A. Kononov, K.Yu. Kotov, E.A. Kravchenko, E.V. Kremyanskaya, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, O.I. Meshkov, S.E. Mishnev, I.I. Morozov, N.Yu. Muchnoi, V.V. Neufeld, S.A. Nikitin, I.B. Nikolaev, A.P. Onuchin, S.B. Oreshkin, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.S. Petrosyan, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, G.E. Pospelov, V.G. Prisekin, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, A.G. Shamov, D.N. Shatilov, E.I. Shubin, B.A. Shwartz, V.A. Sidorov, E.A. Simonov, S.V. Sinyatkin, Yu.I. Skovpen, A.N. Skrinsky, V.V. Smaluk, A.M. Soukharev, M.V. Struchalin, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, A.N. Yushkov, V.N. Zhilich, and A.N. Zhuravlev

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, law, Detector, High Energy Physics::Experiment, Production (computer science), Collider, Mass measurement, Atomic and Molecular Physics, and Optics, High Energy Physics - Experiment, Lepton, law.invention
Abstract

The status of the experiment on the precise $\tau$ lepton mass measurement running at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the $\tau^+\tau^-$ cross section behaviour around the production threshold. The preliminary result based on 6.7 pb$^{-1}$ of data is $m_{\tau}=1776.80^{+0.25}_{-0.23} \pm 0.15$ MeV. Using 0.8 pb$^{-1}$ of data collected at the $\psi'$ peak the preliminary result is also obtained: $\Gamma_{ee}B_{\tau\tau}(\psi') = 7.2 \pm 2.1$ eV., Comment: 6 pages, 8 figures; The 9th International Workshop on Tau-Lepton Physics, Tau06

Published
2007
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16. Measurement of the τ lepton mass at the KEDR detector

Author

I. I. Morozov, K.Yu. Kotov, V. F. Kulikov, G. E. Pospelov, A. N. Yushkov, K. Yu Todyshev, Olga Beloborodova, Evgeny Levichev, E.A. Kuper, E. A. Simonov, S.A. Nikitin, V.A. Tayursky, Yu. A. Tikhonov, S.E. Baru, N. Yu. Muchnoi, Pavel Piminov, A. E. Blinov, S. G. Pivovarov, E. I. Shubin, S. S. Petrosyan, A.G. Shamov, A. B. Bobrov, A.A. Ruban, I. B. Nikolaev, D.V. Bondarev, M.Yu. Barnyakov, Yu.M. Glukhovchenko, V.G. Prisekin, D. A. Maksimov, Andrey Soukharev, V.A. Sidorov, V.V. Gulevich, S.B. Oreshkin, A.N. Skrinsky, V. P. Cherepanov, I. O. Orlov, G.Ya. Kurkin, G.A. Savinov, E. A. Kravchenko, Alexey Talyshev, M. V. Struchalin, V.K. Sandyrev, A. N. Zhuravlev, Anton Poluektov, Sergey Karnaev, E. V. Kremyanskaya, Yu I. Skovpen, Alexey Maslennikov, V.N. Zhilich, V.S. Bobrovnikov, Yu. V. Usov, Oleg Meshkov, V. V. Petrov, S.V. Karpov, A. S. Medvedko, Evgenii Baldin, V.M. Aulchenko, Victor Smaluk, V. M. Malyshev, Sergey Peleganchuk, A. Bondar, Valery I. Telnov, S. E. Mishnev, V. E. Blinov, Dmitry Shatilov, V.V. Neufeld, A. R. Buzykaev, B.A. Shwartz, V. A. Kiselev, S.A. Kononov, G.V. Karpov, A.I. Vorobiov, A.K. Barladyan, V.V. Anashin, A. V. Bogomyagkov, S. V. Sinyatkin, S.I. Eidelman, I. Bedny, G.M. Tumaikin, A. Yu. Barnyakov, A.A. Osipov, and A. P. Onuchin

Subjects
Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), law, Detector, Collider, Mass measurement, Lepton, law.invention
Abstract

A precise τ lepton mass measurement performed at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the τ+τ− cross section behavior around the production threshold. The result based on 6.7 pb−1 of data is m τ = 1776.81 −0.23 +0.25 ± 0.15 MeV. Using 0.8 pb−1 of data collected at the ψ′ peak, we have also determined that Γ ee B ττ(ψ′) = 9.0 ± 2.6 eV.

Published
2007
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17. Method and setup for photodesorption measurements for a nonevaporable-getter-coated vacuum chamber

Author

Nikita V. Fedorov, A.A. Krasnov, V.V. Anashin, Rodion V. Dostovalov, I.R. Collins, Vladimir L. Ruzinov, and Oleg B. Malyshev

Subjects
Yield (engineering), Chemistry, Particle accelerator, Surfaces and Interfaces, Electron, Condensed Matter Physics, Surfaces, Coatings and Films, law.invention, law, Getter, Vacuum chamber, Sensitivity limit, Atomic physics, Sticking probability
Abstract

This article describes a method for measurement of the photodesorption yield and sticking probability for a vacuum chamber coated with nonevaporable getter (NEG). This method is based on a three-gauge method of measurement which was developed and used on a specially designed and assembled setup for the photodesorption yield measurements of test chambers. It has been modified for photodesorption measurements of a vacuum chamber with sorbing walls. Although a short description of the installation and the results of the photodesorption measurements with the NEG-coated vacuum chamber have been published [V. V. Anashin, I. R. Collins, R. V. Dostovalov, N. V. Fedorov, A. A. Krasnov, O. B. Malyshev, and V. L. Ruzinov, The 8th European Particle Accelerator Conference, Paris, France, 2002, p. 2550; Vacuum 75, 155 (2004)], the details of the method, the analysis, and the experimental setup are also described in this article. Special attention is paid to define the sensitivity limit of the method and the setup and to reduce electron- and photon-stimulated desorption in the measurement port.This article describes a method for measurement of the photodesorption yield and sticking probability for a vacuum chamber coated with nonevaporable getter (NEG). This method is based on a three-gauge method of measurement which was developed and used on a specially designed and assembled setup for the photodesorption yield measurements of test chambers. It has been modified for photodesorption measurements of a vacuum chamber with sorbing walls. Although a short description of the installation and the results of the photodesorption measurements with the NEG-coated vacuum chamber have been published [V. V. Anashin, I. R. Collins, R. V. Dostovalov, N. V. Fedorov, A. A. Krasnov, O. B. Malyshev, and V. L. Ruzinov, The 8th European Particle Accelerator Conference, Paris, France, 2002, p. 2550; Vacuum 75, 155 (2004)], the details of the method, the analysis, and the experimental setup are also described in this article. Special attention is paid to define the sensitivity limit of the method and the setup and t...

Published
2005
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18. Status of the KEDR superconducting magnet system

Author

G.A. Blinov, L.M. Barkov, V.P. Smakhtin, S.G. Pivovarov, Yu.I Oschepkov, V.I. Plyusnin, A.K. Barladyan, A.A. Ruban, G. M. Kolachev, V.V. Anashin, S.V. Karpov, Yu. A. Tikhonov, and V. F. Kulikov

Subjects
Physics, Nuclear and High Energy Physics, Electromagnet, Condensed matter physics, Physics::Instrumentation and Detectors, Nuclear engineering, Solenoid, Cryogenics, Superconducting magnet, Superconducting magnetic energy storage, Particle detector, law.invention, law, Condensed Matter::Superconductivity, Electrical equipment, Magnet, Instrumentation
Abstract

Performance of the superconducting magnet system for the KEDR detector as well as its power and cryogenic supplying systems are presented. Their status is reported.

Published
2002
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19. The superconducting solenoid for the KEDR detector

Author

S.V. Karpov, V. F. Kulikov, L.M. Barkov, G.A. Blinov, Y.I. Oschepkov, G. M. Kolachev, Y.A. Tikhonov, A.A. Ruban, Vladimir Smakhtin, V.I. Plyusnin, A.K. Barladyan, V.V. Anashin, and S.G. Pivovarov

Subjects
Superconductivity, Materials science, Physics::Instrumentation and Detectors, Superconducting electric machine, Detector, Solenoid, Superconducting magnet, Superconducting magnetic energy storage, Condensed Matter Physics, Helium-3 refrigerator, Electronic, Optical and Magnetic Materials, law.invention, Nuclear physics, Nuclear magnetic resonance, law, Electromagnetic coil, Physics::Accelerator Physics, High Energy Physics::Experiment, Electrical and Electronic Engineering
Abstract

Performance of the superconducting coil for the KEDR detector is presented. The coil with a diameter of 3 m and 3 m length has been designed for magnetic field up to 1.8 T. The coil has 568 turns of NbTi/Cu cable fixed by soldering (PbSn alloy is used) on the inner wall of the stainless-steel cooling bath. The specific features of this system are the protection of the solenoid by distributed resistance and the power supply being a fluxpump type. The radiation thickness of the solenoid and the E/M ratio are 0.95 X/sub 0/ and 7.8 kJ/kg, respectively. The cryogenic supply system of the KEDR detector has a helium refrigerator with cooling power of 600 W at the temperature of 4.5 K. The main superconducting solenoid and cryogenic system were successfully tested up to 0.7 T and ready for physic experiments with KEDR detector at e/sup +/ e/sup -/ -collider VEPP-4M.

Published
2002
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20. Reflection of photons and azimuthal distribution of photoelectrons in a cylindrical beam pipe

Author

Oleg B. Malyshev, O. Gröbner, V.P Nazmov, B.G Goldenberg, N.V Fedorov, V.V. Anashin, and I.R. Collins

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Bremsstrahlung, Synchrotron radiation, Particle accelerator, Accelerators and Storage Rings, law.invention, Optics, Beamline, law, Reflection (physics), Physics::Accelerator Physics, Vacuum chamber, Atomic physics, business, Instrumentation, Storage ring, Beam (structure)
Abstract

In a cryogenic proton accelerator, such as the LHC, the creation of an electron cloud and generated heat loads resulting from electron bombardment are strongly dependent on the azimuthal distribution of created photoelectrons. In this context, photon reflection and photoelectron yield measurements have been performed using a beam line on the VEPP-2M storage ring. Six electrodes, covering the complete vacuum chamber perimeter, were mounted such that they could be suitably biased, and while one electrode was irradiated with synchrotron radiation the resulting electron current of all the others could be measured. A detailed description of the experimental apparatus and the results of the measurements of photon reflection and the azimuthal distribution of generated photoelectrons are presented.

Published
2000
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21. Tau mass measurement at KEDR

Author

A.G. Shamov, V.V. Anashin, V.M. Aulchenko, E.M. Baldin, A.K. Barladyan, A.Yu. Barnyakov, M.Yu. Barnyakov, S.E. Baru, I.V. Bedny, O.L. Beloborodova, A.E. Blinov, V.E. Blinov, A.V. Bobrov, V.S. Bobrovnikov, A.V. Bogomyagkov, A.E. Bondar, D.V. Bondarev, A.R. Buzykaev, S.I. Eidelman, Yu.M. Glukhovchenko, V.V. Gulevich, S.E. Karnaev, G.V. Karpov, S.V. Karpov, V.A. Kiselev, S.A. Kononov, T.A. Kozlova, K.Yu. Kotov, E.A. Kravchenko, V.F. Kulikov, G.Ya. Kurkin, E.A. Kuper, E.B. Levichev, D.A. Maksimov, V.M. Malyshev, A.L. Maslennikov, A.S. Medvedko, O.I. Meshkov, S.I. Mishnev, I.I. Morozov, N.Yu. Muchnoi, V.V. Neufeld, S.A. Nikitin, I.B. Nikolaev, I.N. Okunev, A.P. Onuchin, S.B. Oreshkin, I.O. Orlov, A.A. Osipov, S.V. Peleganchuk, S.S. Petrosyan, S.G. Pivovarov, P.A. Piminov, V.V. Petrov, A.O. Poluektov, I.N. Popkov, G.E. Pospelov, V.G. Prisekin, A.A. Ruban, V.K. Sandyrev, G.A. Savinov, D.N. Shatilov, B.A. Shwartz, E.A. Simonov, S.V. Sinyatkin, Yu.I. Skovpen, A.N. Skrinsky, V.V. Smaluk, A.M. Sukharev, E.V. Starostina, A.A. Talyshev, V.A. Tayursky, V.I. Telnov, Yu.A. Tikhonov, K.Yu. Todyshev, G.M. Tumaikin, Yu.V. Usov, A.I. Vorobiov, A.N. Yushkov, V.N. Zhilich, V.V. Zhulanov, and A.N. Zhuravlev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, law, Collider, Mass measurement, Atomic and Molecular Physics, and Optics, Lepton, law.invention
Abstract

The status of the experiment on the precise τ lepton mass measurement running at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the τ + τ − cross section behavior around the production threshold. The preliminary result based on 15.2 pb −1 of data is m τ = 1776.69 −0.19 +0.17 ± 0.15 MeV .

Published
2009
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22. Vacuum photodetectors for e+e− collider detectors in BINP

Author

S. I. Serednyakov, Z. K. Silagadze, V. B. Golubev, Yu. V. Usov, L.A. Mironenko, V. P. Druzhinin, I.I. Goldberg, P.M. Bes'chastnov, V.V. Anashin, E.A. Pyata, and M. S. Dubrovin

Subjects
Physics, Nuclear and High Energy Physics, Microchannel, business.industry, Detector, Photodetector, Noise (electronics), law.invention, law, Optoelectronics, business, Collider, Instrumentation, Counting rate, Diode
Abstract

The test results of vacuum phototriodes (VPT) and PMT with microchannel plates (MCPT) are described. About 3000 VPTs now operate successfully in the BINP collider detector. Some recent results on MCPT are presented, in particular tube counting rate capability and the effect of a thin Al film on tube noise. The first measurements of the hybrid PMT with a silicon diode were performed.

Published
1996
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23. Investigation of synchrotron radiation‐induced photodesorption in cryosorbing quasiclosed geometry

Author

V.N. Osipov, V.V. Anashin, W. C. Turner, I.L. Maslennikov, and Oleg B. Malyshev

Subjects
Physics, Large Hadron Collider, Proton, Physics::Instrumentation and Detectors, Bremsstrahlung, Synchrotron radiation, Particle accelerator, Surfaces and Interfaces, Condensed Matter Physics, Electromagnetic radiation, Surfaces, Coatings and Films, law.invention, Superconducting Super Collider, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Coaxial
Abstract

The results of 4.2‐K photodesorption experiments in two quasiclosed geometries are reported, (1) a simple tube and (2) a tube with a coaxial perforated liner. These experiments were designed to measure separately the desorption coefficients of tightly bound and physisorbed molecules. The results are important for the beam tube vacuum of the next generation of superconducting proton colliders that have been contemplated—the 20‐TeV Superconducting Super Collider in the United States and the 7.3‐TeV Large Hadron Collider at CERN.

Published
1994
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24. Cold beam tube photodesorption and related experiments for the Superconducting Super Collider Laboratory 20 TeV proton collider

Author

W. C. Turner, Oleg B. Malyshev, G. Derevyankin, Myron Strongin, C. L. Foerster, W. A. Lanford, V. G. Dudnikov, V.V. Anashin, I.L. Maslennikov, R. Kersevan, M. W. Ruckman, Finn M. Jacobsen, and V.N. Osipov

Subjects
Cryostat, Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Bremsstrahlung, Synchrotron radiation, Particle accelerator, Surfaces and Interfaces, Superconducting magnet, Condensed Matter Physics, Surfaces, Coatings and Films, law.invention, Superconducting Super Collider, Nuclear physics, law, Physics::Accelerator Physics, Atomic physics, Collider
Abstract

The next generation of proton colliders that has been contemplated—the Superconducting Super Collider (SSC) in the U.S. and the Large Hadron Collider (LHC) at CERN—will be the first to encounter significant intensities of synchrotron radiation within the cold bore tube of superconducting magnets. Aside from removal of the synchrotron radiation heat load, the main problem encountered is how to deal with the magnitudes of photodesorbed gases. Choosing the beam tube to coincide with the cryosorbing magnet bore tube has the advantages of simplicity and, in principle, of providing very high pumping speed. Tightly bound H, C, and O in the near‐surface layer (∼100 A) are converted by photodesorption to a steadily increasing surface density of physisorbed molecules. However, the effective pumping by the bore tube is greatly reduced by the photodesorption of relatively weakly bound physisorbed molecules. In addition, the saturation vapor density of H2 at the ∼4.2 K temperature of the SSC cryostats exceeds, by a fa...

Published
1994
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25. Status of the KEDR detector

Author

M.Yu. Lelchuk, M.Yu. Barnyakov, A.G. Chilingarov, A. N. Yushkov, F. Palombo, L.V Romanov, L.M. Barkov, R Ovechkin, N.I. Root, V. A. Kiselev, P.B. Gaidarev, S.V Pivovarov, A.A. Ruban, G.A. Savinov, S.I. Eidelman, V.A. Sidorov, D.A Epifanov, G.D. Minakov, S.B. Oreshkin, I Bedny, V. F. Kulikov, V. E. Blinov, V.M Malyshev, D.M Beilin, P.F. Manfredi, Evgeny Levichev, Valery I. Telnov, A.M Soukharev, L.A. Leontiev, M.A Shubin, D. N. Shatilov, A.G. Shamov, S.A. Nikitin, P. L. Frabetti, A. Bondar, S. S. Petrosyan, V.N. Kozlov, A.S. Kuzmin, Yu. V. Usov, P. Cantoni, A. R. Buzykaev, S.A. Kononov, Valerio Re, Yu I. Skovpen, Francesco Lanni, B.O Baibusinov, D.V Bondarev, L. Dneprovsky, A. I. Shusharo, Sergey Peleganchuk, A.A Talyshev, B.A. Shwartz, R. Snopkov, V.P Nagaslaev, V.P. Smakhtin, G. M. Kolachev, I. Ya. Protopopov, E.M Baldin, S.V. Karpov, Anton Poluektov, A. P. Onuchin, V. N. Zhilich, A.K. Barladyan, V.M. Aulchenko, V.V. Anashin, L.M. Kurdadze, E. A. Kravchenko, Alexey Maslennikov, V.R. Groshev, A. Sokolov, A. E. Blinov, Yu. A. Tikhonov, A.B. Nomerotsky, S.E. Baru, G. E. Pospelov, S.G. Klimenko, A.I Vorobyev, A. I. Naumenkov, K. Yu Todyshev, V.A. Tayursky, A.V Zatcepin, S.A Kuznecov, and V Balashov

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Meson, Physics::Instrumentation and Detectors, Detector, Linear particle accelerator, Particle detector, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, Instrumentation, Energy (signal processing), Cherenkov radiation
Abstract

KEDR is a general-purpose detector for experiments at the VEPP-4M e + e − -collider in the energy range 2 E =2.0– 12 GeV . All detector subsystems (except the aerogel Cherenkov counters) have been installed into the detector at VEPP-4M. Some preliminary data have been taken in the energy region of the J/Ψ meson. The tuning of the detector and the VEPP-4M collider is in progress. Preliminary results on the detector performance are presented. The future experimental program for the KEDR detector is discussed.

Published
2002

26. Superconducting magnetic system of the detector KEDR

Author

G.M. Kolachev, S.V. Sukhanov, V.P. Smakhtin, G.A. Blinov, V.V. Anashin, S.G. Pivovarov, and L.M. Barkov

Subjects
Physics, Superconductivity, Electromagnet, Physics::Instrumentation and Detectors, business.industry, Solenoid, Superconducting magnet, Superconducting magnetic energy storage, Magnetic flux, Electronic, Optical and Magnetic Materials, law.invention, Optics, Nuclear magnetic resonance, law, Electromagnetic coil, Condensed Matter::Superconductivity, Magnet, Electrical and Electronic Engineering, business
Abstract

The detector KEDR will be used in high-energy physics experiments on the storage ring VEPP-4M. The authors describe the KEDR magnetic system, which consists of a main superconducting coil, compensating superconducting solenoids, and an iron yoke closing the magnetic flux. The main superconducting coil is a one-layer solenoid of 3-m diameter and 3-m length with an inductance of 1.2 H, an effective field of 2 T, and a stored energy of 42 MJ. The superconducting coil is wound around and soldered to the inner surface of a ringlike helium vessel and is cooled indirectly through a 10-mm stainless steel wall of the vessel. A superconducting flux pump supplies the coil with 8-kA current. The iron yoke provides the required uniformity of the field. The compensating superconducting solenoids have a length of 450 mm, a diameter of 120 mm, and a magnetic field of 6.7 T. The total weight of KEDR is approximately 1000 tons. >

Published
1992
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27. Investigation of synchrotron radiation-induced photodesorption in cryosorbing quasi-cooled geometry. Revision 2

Author

V.V. Anashin, Oleg B. Malyshev, I.L. Maslennikov, V.N. Osipov, and W. C. Turner

Subjects
Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Synchrotron radiation, Particle accelerator, Cryogenics, Synchrotron, law.invention, Superconducting Super Collider, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Coaxial, Collider
Abstract

We report 4.2-K photodesorption experiments in two quasi -- closed geometries-a simple tube and a tube with a coaxial perforated liner -- designed to manure separately the desorption coefficients of tightly bound and physisorbed molecules. The results are important for the beam tube vacuum of the next generation of superconducting proton colliders that have been contemplated-the 20-TeV Superconducting Super Collider (SSC) in the United States and the 7.3-TeV Large Hadron Collider (LHC) at CERN.

Published
1994
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28. Design of the vacuum system TNK dedicated synchrotron source for X-ray lithography

Author

Vladimir Korchuganov, N.G. Gavrilov, A. I. Nikitin, V.V. Anashin, Emil Trakhtenberg, V. N. Osipov, E. P. Kollerov, and A. N. Bulygin

Subjects
Materials science, business.industry, Synchrotron, law.invention, Optics, Beamline, law, Torr, Optoelectronics, Vacuum chamber, X-ray lithography, Vacuum level, business, Lithography, Storage ring
Abstract

The main features of the vacuum system TNK storage ring and its parameters are discussed. Operating vacuum levels are equal to ∼3×10−9 Torr, a total pumping speed of about 75×103 I/s. The vacuum chamber is made from an aluminum alloy by the hot extrusion method. The SR‐absorber design is also discussed, and the calculation of the middle vacuum level and lifetime is given.

Published
1991
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29. Compact storage rings Siberia‐AS and Siberia‐SM synchrotron radiation sources for lithography

Author

N. A. Mezentsev, V. A. Roenko, N.I. Zubkov, S.V. Sukhanov, V.G. Veshcherevich, V. S. Arbuzov, A.N. Skrinsky, Yu.G. Matveev, Yu.I. Tokarev, S.P. Petrov, L.G. Morgunov, E. I. Gorniker, G.A. Blinov, P.D. Vobly, E.I. Zinin, A.S. Medvedko, E. P. Kollerov, Emil Trakhtenberg, V. V. Repkov, V. M. Petrov, E. A. Perevedentsev, V.V. Anashin, G.N. Kulipanov, N.I. Zinevich, and V. A. Kiselev

Subjects
Physics, Superconductivity, Electromagnet, business.industry, Synchrotron radiation, Particle accelerator, Superconducting magnet, Superconducting magnetic energy storage, law.invention, Nuclear magnetic resonance, Optics, law, Magnet, business, Instrumentation, Storage ring
Abstract

The paper deals with two projects of compact superconducting storage rings for industrial production of integrated circuits (IC) using x‐ray lithography within the 8‐ to 20‐A wavelengths range. The azimuthally symmetric superconducting storage ring Siberia‐AS at an energy of 600 MeV is a superconducting analog of VEP‐1, one of the earliest storage rings in the world intended for the purposes of high‐energy physics. Unlike the conventional design, no iron yoke is used in the storage ring under consideration to form the magnetic field at the equilibrium orbit and to close the return magnetic flux—this is performed by some inner and outer superconducting windings. Such a scheme enables the size of the storage ring to be substantially reduced (a cylinder of 2 m in diameter and 2 m long), and as a result, its weight decreases, too (about 10 tons). The eight‐magnet storage ring Siberia‐SM is of four‐order symmetry so that the periodicity element comprises two rectangular magnets and three lenses. Its basic comp...

Published
1989
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30. Measurement of ψ(3770) parameters

Author

A.E. Bondar, S.V. Karpov, Evgenii Baldin, A. Sokolov, D.N. Grigoriev, Sergey Sinyatkin, S.E. Baru, Pavel Piminov, A. E. Blinov, V. A. Kiselev, A. Bobrov, Sergey Peleganchuk, A.A. Ruban, G.M. Tumaikin, N. Yu. Muchnoi, I.B. Nikolaev, A. Yu. Barnyakov, V.N. Zhilich, A.N. Zhuravlev, V. V. Petrov, G.Ya. Kurkin, A.A. Osipov, S. I. Mishnev, A. P. Onuchin, E.A. Kuper, V.V. Gulevich, V.K. Sandyrev, I. O. Orlov, Tatyana Kharlamova, Oleg Meshkov, V.V. Kolmogorov, S.I. Eidelman, V.M. Aulchenko, A.S. Medvedko, K. Yu. Todyshev, I.Yu. Basok, A.K. Barladyan, E. A. Kravchenko, Evgeny Levichev, Anton Poluektov, A. N. Yushkov, A. R. Buzykaev, E. A. Simonov, V.A. Tayursky, Alexey Talyshev, S.A. Nikitin, Alexey Maslennikov, Dmitry Shatilov, G.A. Savinov, E.V. Starostina, V.F. Kulikov, I. I. Morozov, V.V. Anashin, Victor Bobrovnikov, Yu. A. Tikhonov, M.Yu. Barnyakov, S.A. Kononov, Yu. V. Usov, S.G. Pivovarov, D. V. Gusev, V. E. Blinov, A.G. Shamov, S.B. Oreshkin, A.N. Skrinsky, A.M. Sukharev, A.V. Bogomyagkov, V.V. Neufeld, V.G. Prisekin, D. A. Maksimov, I.N. Okunev, Valery I. Telnov, G.V. Karpov, A.I. Vorobiov, K.Yu. Kotov, O. L. Beloborodova, V. M. Malyshev, B.A. Shwartz, Vladimir Zhulanov, Yu.M. Glukhovchenko, Sergey Karnaev, and Victor Smaluk

Subjects
Physics, Nuclear and High Energy Physics, Partial width, Meson, law, Electron–positron annihilation, Form factor (quantum field theory), Resonance, Electron, Atomic physics, Collider, High Energy Physics - Experiment, law.invention
Abstract

We report the final results of a study of the ψ ( 3770 ) meson using a data sample collected with the KEDR detector at the VEPP-4M electron–positron collider. The data analysis takes into account interference between the resonant and nonresonant D D ¯ production, where the latter is related to the nonresonant part of the energy-dependent form factor F D . The vector dominance approach and several empirical parameterizations have been tried for the nonresonant F D N R ( s ) . Our results for the mass and total width of ψ ( 3770 ) are M = 3779.2 − 1.7 + 1.8 − 0.7 + 0.5 − 0.3 + 0.3 MeV , Γ = 24.9 − 4.0 + 4.6 − 0.6 + 0.5 − 0.9 + 0.2 MeV , where the first, second and third uncertainties are statistical, systematic and model, respectively. For the electron partial width two possible solutions have been found: ( 1 ) Γ e e = 154 − 58 + 79 − 9 + 17 − 25 + 13 eV , ( 2 ) Γ e e = 414 − 80 + 72 − 26 + 24 − 10 + 90 eV . Our statistics are insufficient to prefer one solution to another. The Solution (2) mitigates the problem of non- D D ¯ decays but is disfavored by potential models. It is shown that taking into account the resonance–continuum interference in the near-threshold region affects resonance parameters, thus the results presented cannot be directly compared with the corresponding PDG values obtained ignoring this effect.

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31. Stand for studying photodesorption processes in proton supercollider beam tube prototypes

Author

A.V. Evstigneev, I.L. Maslennikov, Oleg B. Malyshev, A.P. Lysenko, V.V. Anashin, V.N. Osipov, and W.Ch. Turner

Subjects
Physics, Nuclear and High Energy Physics, Photon, Electron energy, Proton, Physics::Instrumentation and Detectors, Synchrotron radiation, Beam tube, law.invention, Superconducting Super Collider, Nuclear physics, law, Physics::Accelerator Physics, Atomic physics, Collider, Instrumentation, Storage ring
Abstract

In this paper we describe a stand for studing photodesorption processes under synchrotron radiation (SR) in proton super collider beam tube prototypes. The storage ring of VEPP-2M was used as a SR source at the Budker Institute of Nuclear Physics. At an electron energy E e = 534 MeV the SR spectrum of the storage ring corresponds to that of the Superconducting Super Collider (SSC) in the USA (critical photon spectrum energy E c = 284 eV). Two beamlines for SR extraction with a setup for desorption coefficient measurements on warm (294 K) and cold (2–77 K) tubes under the SR are described.

32. Recent results from the KEDR detector

Author

A.E. Bondar, E.A. Kuper, N. Yu. Muchnoi, Evgenii Baldin, E. A. Simonov, S.A. Nikitin, V. A. Kiselev, V.V. Kolmogorov, D.A. Maksimov, Alexey Talyshev, I. B. Nikolaev, I.N. Okunev, M.Yu. Barnyakov, Yu. A. Tikhonov, V. V. Petrov, S.A. Kononov, A.K. Barladyan, Alexey Maslennikov, S.V. Karpov, D.N. Grigoriev, V.V. Anashin, V.N. Zhilich, A. N. Yushkov, I.O. Orlov, G.A. Savinov, Sergey Karnaev, Sergey Sinyatkin, G.M. Tumaikin, Yu.M. Glukhovchenko, Oleg Meshkov, V.G. Prisekin, Valery I. Telnov, V.K. Sandyrev, A.N. Zhuravlev, I.I. Morozov, V.M. Aulchenko, Victor Smaluk, Pavel Piminov, A. E. Blinov, V.A. Tayursky, E. A. Kravchenko, B.A. Shwartz, Dmitry Shatilov, S.G. Pivovarov, Vladimir Zhulanov, G.V. Karpov, Yu. V. Usov, Victor Bobrovnikov, V. E. Blinov, A.I. Vorobiov, A. Yu. Barnyakov, A.G. Shamov, A.M. Sukharev, A.A. Osipov, S. I. Mishnev, A. P. Onuchin, A.N. Skrinsky, S.B. Oreshkin, Anton Poluektov, V.V. Gulevich, A.V. Bogomyagkov, A.A. Ruban, A.S. Medvedko, K. Yu. Todyshev, I.Yu. Basok, G.Ya. Kurkin, Tatyana Kharlamova, A. R. Buzykaev, V. Kudryavtsev, D. V. Gusev, Sergey Peleganchuk, Evgeny Levichev, S.E. Baru, A. Bobrov, V. M. Malyshev, E.V. Starostina, V.F. Kulikov, V.V. Neufeld, Andrey Sokolov, Semen Eidelman, K.Yu. Kotov, and O. L. Beloborodova

Subjects
Physics, Annihilation, Physics::Instrumentation and Detectors, QC1-999, Detector, Resonance, Engineering physics, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract

We describe recent results from the KEDR detector at the VEPP-4Mcollider. They include: a search for narrow resonances between 1.85 and 3.1 GeV, a test of leptonic universality by comparing partial widths of the J/ψ resonance into electron and muon pairs, a determination of the main parameters of the ψ(2S) and a measurement of ψ(3770) parameters.

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