Search

Simulation results of pulsed current electromagnet quadrupoles with integral of the magnetic field gradient up to 7 T are presented. Magnets for the DTL and MEBT focusing channels are designing for the heavy-ion linac in Institute for Theoretical and Experimental Physics (ITEP - NRC "Kurchatov Institute"). Appropriate conditions which promise getting the magnetic lens parameters required at restrictions on the overall length 130 mm as well as on the beam aperture >45 mm are defined. It is shown that the channel acceptance to beam emittance ratio desired not less than 3 can be provided by conventional low-carbon steel up to a magnetic aperture of 50 mm in diameter while beyond this size permendur is out of competition. Some aspects of the pulsed power supply system are considered and main parameters of the pulse current generator (PCG) are given., Proceedings of the 12th International Particle Accelerator Conference, IPAC2021, Campinas, SP, Brazil

The Krion-6T ion source is an electron string ion source (ESIS) of multicharged ions. It will be used as an ion source for the heavy ion linac at the NICA project, but has been tested on an existing injection facility - Alvarez-type linac LU-20 with new RFQ type fore-injector. The transverse emittance measurements were carried out on the initial part of channel (IPC) of the low energy beam transport (LEBT) channel, between the ion source and RFQ fore-injector by pepper-pot method. Beams of multicharged Argon and Xenon ions are observed. Measurements of the profile and emittance were performed over several energies for each type of ions. The results of the measurement are presented, and some points of emittance calculations are considered., Proceedings of the 26th Russian Particle Accelerator Conf., RUPAC2018, Protvino, Russia

The pepper-pot emittance measuring device was developed to determine the parameters of the ion source beam. It includes a "pepper-pot" mask, a scintillation screen, a charge-coupled device (CCD) recorder, a personal computer (PC), software for data processing, calculation of beam profile and emittance. Measurements of emittance by pepper-pot method have been successfully carried out on several ion sources, at ITEP and JINR. The pepper-pot measurement method, the emittance meter design, and the emittance calculation technics are presented., Proceedings of the 26th Russian Particle Accelerator Conf., RUPAC2018, Protvino, Russia

An Source of Polarized Ions (SPI), developed at JINR, produces pulsed beams of polarized protons and deuterons for NUCLOTRON accelerator. The accelerated polarized ion beams will be injected into future NICA collider. In order to reconcile requirements of a RFQ fore-injector of the Alvarez type linear accelerator LU-20, it is necessary to measure a transverse emittance of the ion beams produced by the SPI. The emittance of beams of polarized deuterons and polarized protons was measured by the pepper-pot method. The results of measurements of the emittance and profile of the polarized ion beams are presented., Proceedings of the 26th Russian Particle Accelerator Conf., RUPAC2018, Protvino, Russia

Alloys along the quasi-binary line between Sb2Te3 and GeTe with compositions (GeTe)m(Sb2Te3)n, in particular Ge2Sb2Te5, have been intensely studied and are used in the state-of-the-art PCM devices. However, properties of this thin film materials are not optimal and should be improved. In this work, we investigated the effect of tin ion implantation on the properties of amorphous Ge2Sb2Te5 thin films. The Sn ion implantation was done on Multipurpose Test Bench (MTB)* at NRC "Kurchatov Institute"-ITEP. The MTB consists of MEVVA type ion source, electrostatic focusing system, the system of current and beam profile measurements. The charge spectrum of the Sn beam was measured by the time-of-flight method, the beam profile as well as beam current were also measured. The beam's accelerating voltage was calculated by SRIM code in order to implant ions on the required film‘s depth. Tin ions were implanted into GST films at 40 kV accelerating voltage. Effect of Sn ion implantation (1 at. %) on the electrical properties of magnetron GST thin films was investigated., Proceedings of the 26th Russian Particle Accelerator Conf., RUPAC2018, Protvino, Russia

The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR, Dubna. This complex is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector of light ions, polarized protons and deuterons and a new linac HILAc - injector of heavy ions beams. Old HV for-injector of the LU-20, which operated from 1974, is replaced by the new RFQ accelerator, which was commissioned in spring 2016. The first Nuclotron technological run with new fore-injector was performed in June 2016. Beams of D⁺ and H²⁺ were successfully injected and accelerated in the Nuclotron ring. Main results of the RFQ commissioning and the first Nuclotron run with new for-injector is discussed in this paper., Proceedings of the 25th Russian Particle Accelerator Conf., RuPAC2016, St. Petersburg, Russia

In the frame of the Nuclotron-M project the electrostatic injector of LU-20 is replaced by a RFQ accelerator, which has been developed in ITEP. The construction of 400 kW, 145 MHz RF system for RFQ-injector are described. Pa-rameters and test results of the RF power system operated on the resistive load and on RFQ during ion beam accele-ration are presented, Proceedings of the 25th Russian Particle Accelerator Conf., RuPAC2016, St. Petersburg, Russia

The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR. New complex is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector of light ions, polarized protons and deuterons and a new linac HILac of heavy ions. Now the modernization of LU-20 is also realized and old pulse DC injector is planning to replace by RFQ linac. New RFQ linac was developed and manufactured and is now under commissioning at Nuclotron injectors hall. New results of RFQ linac resonator testing and measurements, RF power load and linac testing with deuterium and carbon beam will discuss in this report., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Review of: The Age of Attila: Fifth-Century Byzantium and the Barbarians. Revised edition, with a new introduction and notes by David S. Potter / C. D. Gordon. — Ann Arbor: University of Michigan Press, 2013. — xx + 263 p. by C. D. GordonThe review describes the conceptual and substantial sides of the revised edition of the original book of a researcher of the political history of late antiquity., Рец. на кн.: Gordon C. D. The Age of Attila: Fifth-Century Byzantium and the Barbarians. Revised ed., with a new introduction and notes by D. S. Potter / C. D. Gordon. – Ann Arbor: Univ. of Michigan Press, 2013. – xx + 263 p. Рецензия раскрывает концептуальную и содержательную стороны исправленного издания оригинальной книги исследователя политической истории поздней античности.