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| TUPAK008 |
Longitudinal Bunch Size Measurements with an RF Deflector at J-PARC LINAC |
974 |
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- M. Otani, K. Futatsukawa
KEK, Ibaraki, Japan
- K. Hirano, A. Miura
JAEA/J-PARC, Tokai-mura, Japan
- Y. Liu
KEK/JAEA, Ibaraki-Ken, Japan
- T. Maruta
FRIB, East Lansing, USA
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Measurement of the longitudinal bunch size is important for the stable beam operation. Especially in a medium energy beam transport (MEBT) located after a radio-frequency quadrupole in J-PARC, it is necessary to measure the bunch size with minimum set of equipment to avoid subsequent emittance growth due to space charge. We had proposed a longitudinal size measurement with an rf deflector normally used for deflecting theμbunch; phase spread is migrated to spatial one if the reference particle arrives at the deflector when the voltage is rising in time and is zero. Then a buncher cavity located upstream of the deflector is utilized to scan the phase spread to measure the longitudinal beam parameters. In this poster, recent measurement results are presented.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2018-TUPAK008
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