We report on an experiment to control bunch length by means of changing the momentum compaction factor on the UVSOR storage ring. The momentum compaction factor was varied by changing the dispersion function, and reduced to be approximately one hundredth of the ordinary value. The shortest bunch length estimated from the synchrotron oscillation frequency was 25 ps, which is one tenth of the ordinary value. Correction for the second order momentum compaction factor was found to be essential for operation with the extremely low momentum compaction factor. The results of measurement of the momentum compaction factor and the bunch length are presented.
ASJC Scopus subject areas
- Nuclear and High Energy Physics