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WEPP31 |
Design of the Beam Diagnostic System for the New 3 GeV Light Source in Japan |
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- H. Maesaka, T. Fukui
RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan
- H. Dewa, T. Fujita, M. Masaki
JASRI/SPring-8, Hyogo-ken, Japan
- S. Takano
Japan Synchrotron Radiation Research Institute (JASRI), RIKEN SPring-8 Center, Hyogo, Japan
- K. Ueshima
National Institutes for Quantum and Radiological Science and Technology (QST), Sayo-cho, Japan
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We present a design overview of the beam diagnostic system for the new 3 GeV light source being constructed in Tohoku, Japan, and some test results obtained at SPring-8. This light source will generate brilliant x-rays from a high-quality electron beam having 1 nm rad emittance and 400 mA maximum stored current. To achieve the design performance and stability, we must monitor various beam parameters precisely. The beam position should be detected precisely: single-pass resolution < 0.1 mm (0.1 nC injected beam), COD resolution < 0.1 μm (more than 100 mA stored current), position stability < 5 μm for 1 month. We will use 112 button-type BPMs in the storage ring for these purposes. The stored beam current and beam size are also monitored with a DCCT and an x-ray pinhole camera. We will install a 3-pole wiggler to a straight section for the pinhole camera and other optical diagnostics. A stripline BPM and a stripline kicker will be installed to another straight section to suppress the beam instability and to measure betatron tune. We will use FPGA-based high-speed electronics for instability suppression with a bunch-by-bunch feedback method and real-time tune monitoring.
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Poster WEPP31 [5.643 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2020-WEPP31
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About • |
paper received ※ 02 September 2020 paper accepted ※ 15 September 2020 issue date ※ 30 October 2020 |
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