Design of the beryllium window for Brookhaven Linac Isotope Producer

Nayak, S.¹  Mapes, M.¹  Raparia, D.¹ 

[1]Brookhaven National Lab. (BNL), Upton, NY (United States)

关键词: WINDOWS;    FOILS;    BERYLLIUM;    DESIGN;    ENERGY LOSSES;    BROOKHAVEN 200-MEV LINAC;    FAILURES;    STATIC LOADS;    RELIABILITY;    SIMULATION;    BEAM TRANSPORT;    SERVICE LIFE;   

DOI  :  10.2172/1228862
RP-ID  :  BNL--108598-2015-IR
PID  :  OSTI ID: 1228862
Others  :  R&D Project: KBCH139
Others  :  18038
Others  :  Other: KB0202011
Others  :  TRN: US1600170

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

In the Brookhaven Linac Isotope Producer (BLIP) beam line, there were two Beryllium (Be) windows with an air gap to separate the high vacuum upstream side from low vacuum downstream side. There had been frequent window failures in the past which affected the machine productivity and increased the radiation dose received by workers due to unplanned maintenance. To improve the window life, design of Be window is reexamined. Detailed structural and thermal simulations are carried out on Be window for different design parameters and loading conditions to come up with better design to improve the window life. The new design removed the air gap and connect the both beam lines with a Be window in-between. The new design has multiple advantages such as 1) reduces the beam energy loss (because of one window with no air gap), 2) reduces air activation due to nuclear radiation and 3) increased the machine reliability as there is no direct pressure load during operation. For quick replacement of this window, an aluminum bellow coupled with load binder was designed. There hasn???t been a single window failure since the new design was implemented in 2012.