| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1827955 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 6 Pages |
Abstract
In order to protect 3.4-m-long rf cavities from impinging intense synchrotron radiation (SR), we developed a unique SR mask for use in the Photon Factory Advanced Ring (PF-AR). To obtain a wide aperture that is required for beam injection, we designed the mask so that the head of the mask can be moved over a horizontal range of 30 mm. To avoid the harmful excitation of resonance modes in this mask structure, a microwave absorber was built into it. Two of the designed masks were installed in the PF-AR, and they showed satisfactory performance during routine single-bunch operations under beam currents of up to 60 mA. We report the design of this movable mask and its performance during operations.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Takeshi Takahashi, Tohru Honda, Yoichiro Hori, Masaaki Izawa, Takashi Nogami, Shogo Sakanaka, Yasunori Tanimoto, Takashi Uchiyama, Junko Watanabe,