SPring-8 LEPS2 beamline: A facility to produce a multi-GeV photon beam via laser Compton scattering

We have constructed a new laser-Compton-scattering facility, called the LEPS2 beamline, at the 8 GeV electron storage ring, SPring-8. This facility provides a linearly polarized photon beam in a tagged energy range of 1.3–2.4 GeV. Thanks to a small divergence of the low-emittance storage-ring electr...

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Veröffentlicht in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2022-06, Vol.1033, p.166677, Article 166677
Hauptverfasser: Muramatsu, N., Yosoi, M., Yorita, T., Ohashi, Y., Ahn, J.K., Ajimura, S., Asano, Y., Chang, W.C., Chen, J.Y., Daté, S., Gogami, T., Hamano, H., Hashimoto, T., Hiraiwa, T., Hotta, T., Ishikawa, T., Kasamatsu, Y., Katsuragawa, H., Kobayakawa, R., Kohri, H., Masumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Morino, Y., Nakano, T., Nam, T., Niiyama, M., Nozawa, Y., Ohkuma, H., Ohnishi, H., Ohta, T., Oishi, M., Ozawa, K., Ryu, S.Y., Sada, Y., Saito, H., Shibukawa, T., Shimizu, H., Shirai, R., Shoji, M., Sumihama, M., Suzuki, S., Tanaka, S., Taniuchi, Y., Tokiyasu, A.O., Tomida, N., Tsuchikawa, Y., Watanabe, K., Yoon, C.J., Yoshida, C.
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Sprache:eng
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Zusammenfassung:We have constructed a new laser-Compton-scattering facility, called the LEPS2 beamline, at the 8 GeV electron storage ring, SPring-8. This facility provides a linearly polarized photon beam in a tagged energy range of 1.3–2.4 GeV. Thanks to a small divergence of the low-emittance storage-ring electrons, the tagged photon beam has a size (σ) suppressed to about 4 mm even after it travels about 130 m to the experimental building that is independent of the storage ring building and contains large detector systems. This beamline is designed to achieve a photon beam intensity higher than that of the first laser-Compton-scattering beamline at SPring-8 by adopting the simultaneous injection of up to four high-power laser beams and increasing a transmittance for the long photon-beam path up to about 77%. The new beamline is under operation for hadron photoproduction experiments.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2022.166677