short bunch length measurements for low-alpha lattices at the TPS

CHIA-HSIANG CHEN^1*, C. Y. Liao², J. Y. Chen¹, F. H. Tseng¹, C. C. Kuo¹, H. J. Tsai¹, Y. C. Liu¹, M. S. Chiu¹, G. H. Luo¹, P. J. Chou¹, K. H. Hu², K. T. Hsu², C. C. Liang³

¹light source division/beam dynamics group, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
²light source division/instrumentation & control group, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
³beamline group, National Synchrotron Radiation Research Center, Hsinchu, Taiwan

* Presenter:CHIA-HSIANG CHEN, email:chen.chiahsiang@nsrrc.org.tw

We developed and tested a lower momentum compaction factor (low alpha) lattice at the Taiwan Photon Source (TPS). Operating in a low alpha lattice can provide picosecond bunch lengths for time-resolved research and generate coherent IR/THz synchrotron light. A bunch length of about 2.5 picosecond rms was measured by a streak camera in low alpha mode while operating in routine users mode it is as long as 10 picosecond. In this paper, we discuss related processes and measurements.

Keywords: low alpha lattice , short bunch length , streak camara, TPS