Monte Carlo radiation transport codes are used by the CMS Beam Radiation Instrumentation and Luminosity (BRIL) project to estimate the radiation levels due to proton–proton collisions and machine ...induced background. Results are used by the CMS collaboration for various applications: comparison with detector hit rates, pile-up studies, predictions of radiation damage based on various models (Dose, NIEL, DPA), shielding design, estimations of residual dose environment. Simulation parameters, and the maintenance of the input files are summarized, and key results are presented. Furthermore, an overview of additional programs developed by the BRIL project to meet the specific needs of CMS community is given.
The design and parameters of the polarized-beam facility at U-70 proton synchrotron of IHEP, Protvino, are presented. The polarized proton and antiproton beam line 24A is currently under development ...at IHEP. It will serve as a main playground for carrying out the rich program of the SPASCHARM experiment for comprehensive studies of spin phenomena in a wide variety of hadronic reactions in the beam energy range of ∼10-45 GeV.
A calorimetric-time-of-flight technique was used for real-time, high-precision measurement of neutron spectra at an angle of 175
o from the initial proton beam direction, which hits a face plane of a ...cylindrical lead target of 20
cm in diameter and 25
cm thick. A comparison was performed between the neutron spectra predicted by the MARS, RTS&T, MCNP6, and the MCNPX 2.6.0 transport codes and that measured for 200, 400, 600, 800, and 1000
MeV protons. Neutron spectra were measured within the energy range from 0.7 to 250
MeV almost continuously. The transport codes tested here describe with different success the measured spectra, depending on the energy of the detected neutrons and on the incident proton energy, but all the models agree reasonably well with our data.
The polarized proton and antiproton beam project at U-70 accelerator Abramov, V.V.; Azhgirey, I.L.; Garkusha, V.I. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
09/2018, Letnik:
901
Journal Article
Recenzirano
Odprti dostop
The design and parameters of the polarized-beam facility at U-70 proton synchrotron of NRC “Kurchatov Institute” — IHEP are presented. The new beamline 24A will provide the polarized proton and ...antiproton beams for carrying out the rich physics program of the SPASCHARM experiment for comprehensive studies of spin phenomena in a wide spectrum of hadronic reactions in the energy range of 10–45 GeV.
The SPASCHARM experiment is aimed at a systematic study of the nucleon spin structure and the spin dependence of the strong interaction of antimatter and matter with matter at energies up to 45 GeV. ...As part of the first stage of the experiment, the study of the spin properties of hadrons will take place in a beam of negatively charged hadrons on existing beamline 14 at the operating SPASCHARM setup at the U70 facility. At the second stage, the production of polarized beams of protons and antiprotons is envisaged in beamline 24A of the U-70 accelerator facility. A polarized antiproton beam will certainly become a unique beam in the world. It is planned to measure single-spin asymmetries in dozens of reactions, both on hydrogen and on various nuclei. At the SPASCHARM facility, it is also possible to measure the transverse polarization of hyperons and elements of the spin density matrix of vector mesons. The spin structure of the nucleon will be investigated in the study of quarkonium production to determine the contribution of gluons to the proton spin. The presence of two types of polarized beams and eight types of nonpolarized beams (π
±
,
K
±
,
p
,
,
d
,
C
), in combination with a polarized target, expands the range of studies of polarization phenomena and enhances the uniqueness of the project.
A comparison of the main parameters of spatial distribution of energy deposition was performed for two codes predictions (MARS and RTS&T) and experimental data for 1GeV protons incident on targets ...composed of beryllium, carbon, aluminium, iron, copper, lead, bismuth, and tungsten. In general, calculations show a good agreement with data, but no definable trend could be determined for materials because some code predictions were higher and some lower than the experimental results. Parametrization can be used for quick modelling by the MC FAST method for radiation therapy and proton radiography, and in high-energy physics for the calculation of hadron calorimeteres.
A calorimetric-time-of-flight (CTOF) technique was used for real-time, high-precision measurement of the neutron spectrum at an angle of 175° from the initial proton beam direction, which hits a face ...plane of a cylindrical iron target of 20
cm in diameter and 25
cm thick. A comparison was performed between the neutron spectra predicted by the MARS and the MCNPX codes and that measured for 400, 600, 800, 1000 and 1200
MeV protons.
A calorimetric-time-of-flight (CTOF) technique was used for real-time, high-precision measurement of the neutron spectrum at an angle of 175(o) from the initial proton beam direction, which hits a ...face plane of a cylindrical iron target of 20cm in diameter and 25cm thick. A comparison was performed between the neutron spectra predicted by the MARS and the MCNPX codes and that measured for 400, 600, 800, 1000 and 1200MeV protons.
A calorimetric-time-of-flight (CTOF) technique was used for real-time, high-precision measurement of neutron spectrum at the angle of 175° from the initial proton beam direction, which hits a face ...plane of a cylindrical tungsten target 20
cm in diameter and 25
cm thick. A comparison was performed between the neutron spectra predicted by the MARS and the MCNPX code systems and measured by experiments for 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2
GeV protons.
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