beam loss scenarios for MuCool Test Area

Rakhno, Igor ; Johnstone, Carol ; /Fermilab

关键词: CAVITIES;    COMPLIANCE;    CONFIGURATION;    CONSTRUCTION;    DEPOSITION;    DOSE RATES;    FERMILAB;    HYDROGEN;    LINEAR ACCELERATORS;    MUON BEAMS;    MUONS;    PROTON BEAMS;    PROTONS;    SHIELDING;    SHIELDING MATERIALS;    SPECIFICATIONS;    TARGETS Accelerators;   

DOI  :  10.2172/986975
RP-ID  :  FERMILAB-TM-2457-APC
PID  :  OSTI ID: 986975
Others  :  TRN: US1006639

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

The MuCool Test Area (MTA) is an intense primary beam facility derived directly from the Fermilab Linac to test heat deposition and other technical concerns associated with the liquid hydrogen targets, gas-filled RF cavities, and other apparatus being developed to cool intense, large-emittance muon beams. In this study the results of Monte Carlo modeling of several beam loss scenarios are presented. The MTA facility was designed to test targets and other muon cooling apparatus using the intense Fermilab Linac beam. The requested intensity of the proton beam for the MTA is essentially full Linac capability, or 1.6 x 10{sup 13} protons per pulse and an energy of 400 MeV. Two modes of operation will be supported in the MuCOOL beamline: one mode for emittance measurements (and beamline studies) and a second mode for MTA experiments. Maximum beam intensity for these two modes is: 9.6 x 10{sup 15} protons/hr - 600 beam pulses/hour of full Linac beam pulse intensity (1.6 x 10{sup 13} protons/pulse) to the emittance beam absorber and 9.6 x 10{sup 14} protons/hour - 60 beam pulses/hour of full Linac beam pulse intensity to experiments in the MTA experimental hall. This extremely high intensity implies careful investigation into and application of proper shielding materials and configuration in order to satisfy the following two requirements: (i) to reduce the instantaneous dose rate outside of the experimental enclosure to prescribed levels appropriate for the area considered; (ii) to ensure the civil construction of the hall is capable of additional shielding and, further, that the weight of the shielding is commensurate with the loading specifications of the enclosure, notably the ceiling. A number of scenarios for beam loss at different locations were studied in order to determine the maximum beam intensity which is in compliance with the existing shielding. The modeling was performed with the MARS15 code.