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Takahashi, Hitoshi; Agari, Keizo; Hirose, Erina
Proceedings of the 5th annual meeting of Particle Accelerator Society of Japan and the 33rd Linear Accelerator Meeting in Japan2008
Proceedings of the 5th annual meeting of Particle Accelerator Society of Japan and the 33rd Linear Accelerator Meeting in Japan2008
AbstractAbstract
[en] At J-PARC hadron facility, two beam collimators are placed downstream of a secondary-beam-production target. The aim of the collimators is to protect magnets from huge amount of radiation and heat from the target, and to reduce radiation dose downstream of the beam line by localizing the beam loss. In order to reduce the Tritium production in the cooling water, both of the collimators are made of oxygen-free copper having high thermal conductivity and are water-cooled at circumference. In the first collimator, cooling water directly flow in hollow in the copper blocks, which is made by Boring and Trepanning Association (BTA) process. As for the second collimator, stainless-steel cooling-water pipes are involved in the copper blocks by Hot Isostatic Pressing (HIP). (author)
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Particle Accelerator Society of Japan, Tokyo (Japan); 986 p; 2008; p. 292-294; 5. annual meeting of Particle Accelerator Society of Japan; Higashi-Hiroshima (Japan); 6-8 Aug 2008; 33. Linear Accelerator Meeting in Japan; Higashi-Hiroshima (Japan); 6-8 Aug 2008; Available from Particle Accelerator Society of Japan. Also available from the Internet at URL http://www.pasj.jp/web_publish/pasj5_lam33/index.html; This CD-ROM can be used for WINDOWS 9x/NT/2000/ME/XP/VISTA, MACINTOSH; Acrobat Reader is included; Data in PDF format, Folder Name: PDF, Paper ID: WP015.pdf
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Miscellaneous
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Conference
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