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Title: Design of the beryllium window for Brookhaven Linac Isotope Producer

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.
Authors:
 [1] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
OSTI Identifier:
1228862
Report Number(s):
BNL--108598-2015-IR
R&D Project: KBCH139; 18038; KB0202011; TRN: US1600170
DOE Contract Number:
SC00112704
Resource Type:
Technical Report
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Linac Isotope Producer (BLIP)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; WINDOWS; FOILS; BERYLLIUM; DESIGN; ENERGY LOSSES; BROOKHAVEN 200-MEV LINAC; FAILURES; STATIC LOADS; RELIABILITY; SIMULATION; BEAM TRANSPORT; SERVICE LIFE