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Start Over Author "G. Sbrizzai" Journal journal of instrumentation
4 results on '"G. Sbrizzai"'

1. The gain in Thick GEM multipliers and its time-evolution

Author

M. Büchele, L. Steiger, G. Sbrizzai, F. Tessarotto, M. Gregori, M.G. Alexeev, D. Panzieri, K. Königsmann, F. A. Pereira, A. Maggiora, M. Chiosso, K. Novakova, S. Levorato, G. Menon, S. Takekawa, Franco Bradamante, O. Y. Denisov, B. Gobbo, S. Dalla Torre, P. Schiavon, J. Novy, Federica Sozzi, Miroslav Sulc, S. Schopferer, Andrea Bressan, M. Finger, Nour Makke, François Herrmann, Alan D. Martin, H. Fischer, Celso Augusto Guimarães Santos, J.F.C.A. Veloso, R. Birsa, V. Duic, P. Ciliberti, M. Slunečka, S. Dasgupta, Alexeev, M., Birsa, Renato, Bradamante, Franco, Bressan, Andrea, Büchele, M., Chiosso, M., Ciliberti, Piero, Torre, S. Dalla, Dasgupta, SHUDDHA SHANKAR, Denisov, O., Duic, Venicio, Finger, M., Fischer, H., Gobbo, Benigno, Gregori, M., Herrmann, F., Königsmann, K., Levorato, Stefano, Maggiora, A., Makke, Nour, Martin, Anna, Menon, G., Novakova, K., Novy, J., Panzieri, D., Pereira, F. A., Santos, C. A., Sbrizzai, Giulio, Schiavon, Paolo, Schopferer, S., Slunecka, M., Sozzi, Federica, Steiger, Luka, Sulc, M., Takekawa, Stefano, Tessarotto, Fulvio, and Veloso, J. F. C. A.

Subjects
Physics, Photon, Physics::Instrumentation and Detectors, business.industry, Particle tracking detectors (Gaseous detectors), Detector, Time evolution, Electron, Particle detector, Photon detectors for UV, visible and IR photons (gas), Instrumentation, Mathematical Physics, Upgrade, Optics, Measuring instrument, Gas electron multiplier, visible and IR photons (gas), business, Photon detectors for UV
Abstract

In the context of a project to upgrade the gas photon detectors of COMPASS RICH-1, we have performed an R&D programme aimed to develop photon detectors based on multi-layer arrangements of thick GEM electron multipliers coupled to a CsI photoconverter. For this purpose, thick GEMs have been characterised in detail including the gain performance, its dependance on the geometrical parameters and its time-evolution, a feature exhibited by the gas detectors with open insulator surfaces. The variation due to this evolution drammatically depends on the parameters themselves. In the present article we summarise the outcomes of the studies dedicated to the thick GEM gain and its evolution versus time. We also include a qualitative model which accounts for the peculiar details of the observed thick GEM gain time-evolution.

Published
2015

2. Status and progress of novel photon detectors based on THGEM and hybrid MPGD architectures

Author

M Alexeev, R Birsa, F Bradamante, A Bressan, M Büchele, M Chiosso, P Ciliberti, S Dalla Torre, S Dasgupta, O Denisov, V Duic, M Finger, H Fischer, M Giorgi, B Gobbo, M Gregori, F Herrmann, K Königsmann, S Levorato, A Maggiora, A Martin, G Menon, K Novakova, J Novy, D Panzieri, F A Pereira, C A Santos, G Sbrizzai, P Schiavon, S Schopferer, M Slunecka, F Sozzi, L Steiger, M Sulc, S Takekawa, F Tessarotto, and J F C A Veloso

Subjects
Physics, Photon, Large Hadron Collider, business.industry, Detector, MicroMegas detector, Photocathode, Particle detector, Optics, COMPASS experiment, Gas electron multiplier, business, Instrumentation, Mathematical Physics
Abstract

Recent progress in the development of THGEM-based photon detectors confirm the validity of this novel technology. Detectors made of THGEMs, arranged in a three layer architecture, with a CsI coating on the first layer (acting as a reflective photocathode), have been produced and operated in laboratory and during test beam runs: they provide a gain of 105 and a time resolution better than 10 ns. Improvements in the production of THGEMs with 300 ? 300 mm2 active area have recently been introduced leading to a uniform gain response and performance similar to that provided by the small area THGEMs. Promising results have been obtained by combining THGEM and Micromegas technologies to form a hybrid MPGD-based photon detector: the first prototype has proved to stably operate at large gain in a variety of gas mixtures, including pure CH4 and to provide a low ion backflow rate. The RICH-1 detector of the COMPASS Experiment at CERN SPS will be equipped with a set of MPGD-based photon detectors replacing MWPC-based ones.

Published
2013

3. Ion backflow in thick GEM-based detectors of single photons

Author

M Alexeev, R Birsa, F Bradamante, A Bressan, M Chiosso, P Ciliberti, S Dalla Torre, S Dasgupta, O Denisov, V Duic, M Finger, H Fischer, M Giorgi, B Gobbo, M Gregori, F Herrmann, K Königsmann, S Levorato, Q Liu, A Maggiora, A Martin, G Menon, F Nerling, K Novakova, J Novy, D Panzieri, F A Pereira, C A Santos, G Sbrizzai, P Schiavon, C Schill, S Schopferer, M Slunecka, F Sozzi, L Steiger, M Sulc, S Takekawa, F Tessarotto, J F C A Veloso, M., Alexeev, Birsa, Renato, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, S., Dalla Torre, S., Dasgupta, O., Denisov, Duic, Venicio, M., Finger, H., Fischer, Giorgi, Marcello, B., Gobbo, M., Gregori, F., Herrmann, K., Königsmann, Levorato, Stefano, Q., Liu, A., Maggiora, Martin, Anna, G., Menon, F., Nerling, K., Novakova, J., Novy, D., Panzieri, F. A., Pereira, C. A., Santo, Sbrizzai, Giulio, Schiavon, Paolo, C., Schill, S., Schopferer, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, Takekawa, Stefano, F., Tessarotto, and J. F. C. A., Veloso

Subjects
Photon, Physics::Instrumentation and Detectors, rich1, Context (language use), COMPASS, gaseous photon detectors, Electron, Particle detector, Ion, Particle identification methods, Optics, visible and IR photons (gas), Photon detectors for UV, Instrumentation, Mathematical Physics, Backflow, Physics, business.industry, Cherenkov detectors, Detector, Photon detectors for UV, visible and IR photons (gas), Gas electron multiplier, Optoelectronics, High Energy Physics::Experiment, business
Abstract

Photon detectors based on micropattern gas detectors represent a new generation of gaseous photon detectors. In the context of a project to upgrade the gas photon detectors of COMPASS RICH-1, we are performing an R&D programme aimed both to establish the principles and to develop the engineering aspects of photon detectors based on multi-layer arrangements of thick GEMs electron multipliers coupled to a CsI photoconverter. In this context, a reduced rate of the backflow of the positive ions generated in the multiplication process is required to overcome the critical issues related to the bombardment of the CsI photoconverter by ions. Our studies devoted to develop detector architectures able to provide reduced ion backflow rates are reported.

Published
2013

4. Development of THGEM-based photon detectors for Cherenkov Imaging Counters

Author

M Alexeev, M Alfonsi, R Birsa, F Bradamante, A Bressan, M Chiosso, P Ciliberti, G Croci, M L Colantoni, S Dalla Torre, O Denisov, S Duarte Pinto, V Duic, A Ferrero, M Finger, H Fischer, G Giacomini, M Giorgi, B Gobbo, R Hagemann, F H Heinsius, F Herrmann, V Jahodova, K Königsmann, D Kramer, L Lauser, S Levorato, A Maggiora, A Martin, G Menon, A Mutter, F Nerling, D Panzieri, G Pesaro, J Polak, E Rocco, L Ropeleswki, F Sauli, G Sbrizzai, P Schiavon, C Schill, S Schopferer, M Slunecka, F Sozzi, L Steiger, M Sulc, S Takekawa, F Tessarotto, H Wollny, Alexeev, M, Alfonsi, M, Birsa, R, Bradamante, F, Bressan, A, Chiosso, M, Ciliberti, P, Croci, G, Colantoni, L, Dalla Torre, S, Denisov, O, Duarte Pinto, S, Duic, V, Ferrero, A, Finger, M, M., F, Fischer, H, Giacomini, G, Giorgi, M, Gobbo, B, Hagemann, R, Heinsius, H, Herrmann, F, Jahodova, V, Königsmann, K, Kramer, D, Lauser, L, Levorato, S, Maggiora, A, Martin, A, Menon, G, Mutter, A, Nerling, F, Panzieri, D, Pesaro, G, Polak, J, Rocco, E, Ropeleswki, L, Sauli, F, Sbrizzai, G, Schiavon, P, Schill, C, Schopferer, S, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Takekawa, S, Tessarotto, F, Wollny, H, M., Alexeev, M., Alfonsi, Birsa, Renato, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, G., Croci, M. L., Colantoni, S., Dalla Torre, O., Denisov, S., Duarte Pinto, Duic, Venicio, A., Ferrero, M., Finger, M., Finger Jr, H., Fischer, G., Giacomini, Giorgi, Marcello, B., Gobbo, R., Hagemann, F. H., Heinsiu, F., Herrmann, V., Jahodova, K., K¨onigsmann, D., Kramer, L., Lauser, Levorato, Stefano, A., Maggiora, Martin, Anna, G., Menon, A., Mutter, F., Nerling, D., Panzieri, Pesaro, Giulia, J., Polak, E., Rocco, L., Ropeleswki, F., Sauli, Sbrizzai, Giulio, Schiavon, Paolo, C., Schill, S., Schopferer, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, Takekawa, Stefano, F., Tessarottoc, and H., Wollny

Subjects
Photon, Physics::Instrumentation and Detectors, Particle detector, Photocathode, Particle identification, Electron multipliers (gas), Optics, Detectors and Experimental Techniques, Photon detectors for UV, Instrumentation, Mathematical Physics, Cherenkov radiation, Physics, business.industry, Detector, thickGEM, MicroMegas detector, detector development, Micro-pattern gas detectors, Photoelectric effect, Micropattern gaseous detectors (MSGC GEM THGEM RETHGEM MICROMEGAS InGrid etc), Visible and IR photons (gas) (gas-photocathodes solid-photocathodes), Gas electron multiplier, business, Cherenkov detector
Abstract

The development of a large size gaseous detector of single photons, able to stably operate at high gain and high rate, and to provide good time resolution and insensitivity to magnetic field would be beneficial to future Cherenkov Imaging Counters. The detector could be based on the use of a multilayer architecture of THGEM electron multipliers coupled to a solid state CsI photocathode. A systematic study of the response of THGEM-based counters versus the geometrical parameters has been performed and the main results will be presented. Small photon detector prototypes have been built and preliminary data obtained detecting single photoelectrons are presented as well. The key aspect of photoelectron extraction from the photocathode is illustrated presenting both simulation and dedicated measurement results. © 2010 IOP Publishing Ltd and SISSA

Published
2010

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