Observation of Beam-Bunch Lengthening in the 1.3-GeV Electron Synchrotron

The beam-bunch lengths in the accelerating stage of the 1.3-GeV electron synchrotron were measured at the operating energies ( E 0 ) of 0.6-0.9 GeV. Both of the obtained behaviors: the bunch-length reduction from 1.0 ns (rms width) to 0.35 ns and the position variation on the rf phase, are described...

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Veröffentlicht in:Japanese Journal of Applied Physics 1993-11, Vol.32 (11A), p.L1638
Hauptverfasser: Hashimoto, Yoshinori, Koseki, Tadashi, Kudo, Hirofumi, Maruyama, Koichi, Masuda, Hitoshi, Mutou, Masayuki, Ohkuma, Haruo, Shinoe, Kenji
Format: Artikel
Sprache:eng
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Zusammenfassung:The beam-bunch lengths in the accelerating stage of the 1.3-GeV electron synchrotron were measured at the operating energies ( E 0 ) of 0.6-0.9 GeV. Both of the obtained behaviors: the bunch-length reduction from 1.0 ns (rms width) to 0.35 ns and the position variation on the rf phase, are described well by a tracking-simulation calculation. An intensity-dependent bunch lengthening: 0.19 ns at 0.5 mA and 0.30 ns at 100 mA for a voltage pattern of the rf accelerating field at E 0 =0.6 GeV, is observed. Neither the tracking calculation nor other known bunch-lengthening mechanisms can explain the data.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.32.L1638