Shielding calculation for the thickness of the SR facility safety shutter

Shielding calculation for the thickness of the SR facility safety shutter 1 2 first-author 1 2 Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, China; Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, China; Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800, China Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800, China The safety shutter of the SR (synchrotron radiation) facility located at the front end of the facility is an indispensable component for radiation protection. Its thickness is decided by the gas bremsstrahlung produced in the SR facility storage ring by the interaction of electrons with the residual gas molecules in the vacuum chamber of the storage ring. In the calculation, the 3.5GeV, 300mA electron beam and a 15m long insertion-device straight section (0.133μPa) were taken into account, and the safety shutter was assumed to be located 12m away from the end of the straight section. The EGSnrc code based on the Monte-Carlo method and empirical formulas were used, respectively, to calculate the thickness to satisfy the shielding requirement of the safety shutter at the front end of the SR facility, and the results were compared and the availability of EGSnrc was proved. SR facility Safety shutter Monte-Carlo method EGSnrc code References Tromba G , Rindi A . Nucl. Instr and Meth in Phys Res , 1990 , A292 : 700 . Nucl. Instr and Meth in Phys Res National Shanghai Synchrotron Radiation Facility Center , Shanghai Synchrotron Radiation Facility Preliminary Design , P 6 - 1 , 2001 Shanghai Synchrotron Radiation Facility Preliminary Design Job P K , Haeffner D R , Shu D . Bremsstrahlung scattering calculations for the beam stops and collimators in the APS insertion-device beamlines, ANL/APS/TB-20 , 1993 . Bremsstrahlung scattering calculations for the beam stops and collimators in the APS insertion-device beamlines, ANL/APS/TB-20 Ferrari A , Pelliccioni M , Sala P R . Nucl. Instr and Meth in Phys Res , 1993 , B83 : 518 . Nucl. Instr and Meth in Phys Res Kawrakow I , Hirayama H , Rogers D W O . The EGSnrc Code System . Canada : National Research Council of Canada . 2003 : 14 - 15 . The EGSnrc Code System Ipe N , Haeffner D R , Alp E E , et al . Guide to beamline radiation shielding design at the advanced photon source, ANL/APS/TB-7 , 1994 . Guide to beamline radiation shielding design at the advanced photon source, ANL/APS/TB-7 Berger M J , Hubbell J H , Seltzer S M , et al . XCOM: Photon cross sections database, NBSIR 87-3597 , 2005 . XCOM: Photon cross sections database, NBSIR 87-3597 Ipe N I , Fasso A . Impact of gas bremsstrahlung on synchrotron radiation beamline shielding at the advanced photon source, Slac-Pub-6410 , 1994 . Impact of gas bremsstrahlung on synchrotron radiation beamline shielding at the advanced photon source, Slac-Pub-6410 10.1016/S1001-8042(06)60037-7 TL594,TL71 2006-02-22 2006-08-20 2021-01-19 2006 Nuclear Science and Techniques 04 17