Keyword: hadron
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MOPSA06 Parameters of the Normal Conducting Accelerating Structure for the Up to 1 GeV Hadron Linacs linac, cavity, coupling, multipactoring 142
 
  • I.V. Rybakov, A. Feschenko, L.V. Kravchuk, V.V. Paramonov, V.L. Serov
    RAS/INR, Moscow, Russia
 
  Compensated bi-periodic accelerating structure Cut Disk Structure (CDS) was developed for accelerating particle beams at beta eq 1. In the papers dedicated to the development of this structure, a significant decrease in Ze was shown for medium energies range, beta 0.4-0.5. For high-intensity hadron linacs, this energy range, in which particles are captured to acceleration from the drift tube structure, is of the greatest interest. In this paper, a set of CDS parameters was obtained, which provides a Ze value not lower in the comparison to the proven structures in the medium energy range. By the comparison of the electrodynamic and technological parameters of CDS with these structures, the advantages of its application in multi-section cavities for the up to 1 GeV linacs are shown. The selection of optimal cells manufacturing tolerances, the method of its tuning before brazing and frequency parameters control, and the selection of the method for multipactor discharge suppression are determined. The results of the sketch project of the CDS cavity numerical simulation as a non-uniform coupled system and optimization of the transition part of sections and bridge devices are presented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA06  
About • Received ※ 22 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021
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TUPSB51 Measurement of Neutron Field Functionals Around a Neutron Converter of 50 GeV Protons neutron, proton, experiment, detector 330
 
  • Ja.N. Rascvetalov, Yu.V. Beletskaya, A.G. Denisov, A.A. Durum, V.L. Ilukin, A. Mamaev, V.N. Peleshko, I.N. Piryazev, E.N. Savitskaya, M.M. Sukharev, S.E. Sukhikh, A.A. Yanovich
    IHEP, Moscow Region, Russia
 
  The experiment was performed on a pulsed neutron source of the "Neutron" research bench, being created at the U-70 accelerator at National Research Center "Kurchatov Institute" - IHEP, Protvino. Neutrons were generated by the 50 GeV proton beam in the special converter. As a measurement method, neutron activation analysis was used with a set of threshold activation detectors made of C, Al, Nb, In, Bi materials. The neutron energy thresholds of these detectors are in the range from 1 MeV to 75 MeV. The aluminium activation foils were used to calculate the absolute values of the proton quantities in the exposures. The results of measurements and calculations are presented in the form of the following functionals: nuclides activity of threshold reactions in detectors at the end of the exposure; reaction rate; neutron fluences with energies greater than the threshold. To estimate these values, the spectra of neutrons, protons and pions were calculated using the particle transport codes MARS and HADRON with the FAN15 as a low-energy block. It was found that neutrons dominate up to 100 MeV, and the charged hadrons contribution to the total reaction rate for a particular nuclide formation can range from 4% to 46%.  
poster icon Poster TUPSB51 [1.129 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB51  
About • Received ※ 15 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 04 October 2021  
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