Development of SPring-8 vacuum system

被引：1
|
作者：
Shoji, Masazumi [1 ]
Oishi, Masaya [1 ]
Yorita, Tetsuhiko [1 ]
Taniuch, Yukiko [1 ]
Okayasu, Yuichi [1 ]
Yonehara, Hiroto [1 ]
Ohkuma, Haruo [1 ]
机构：
[1] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan
来源：
VACUUM | 2009年 / 84卷 / 05期
关键词：
SPring-8; Storage ring; Vacuum system;
D O I：
10.1016/j.vacuum.2009.06.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
SPring-8 storage ring has been available for user operation with low emittance and extreme stability for over 10 years. However there occurred some problems in the components of the storage ring due to high-brightness synchrotron radiation (SR) and low-emittance operation. On the vacuum system of the storage ring, an accurate pressure could not be measured near the photon absorber due to scattered high-energy SR to the gauge head. High-energy SR activated dissolved oxygen in cooling water, and the activated dissolved oxygen corroded the inside of the photon absorbers in SR irradiation part. Air leakage occurred at an injection chamber due to impact by a small-size electron beam produced by low-emittance operation. We investigated the cause of the aforementioned difficulties with the vacuum system and prescribed the treatments described in this paper. In addition, we are making continual efforts at further system upgrades such as developing an RF shield that suppresses temperature increase in the shield in possible high-current operation. (C) 2009 Elsevier Ltd. All rights reserved,
引用
收藏
页码：738 / 742
页数：5
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