Bunch compression at the SPring-8 linac and successive generation of THz pulse train in the isochronous ring

• Published in: Infrared physics & technology 2008-05, Vol.51 (5), p.394-396
• Main Authors: Shoji, Yoshihiko, Asaka, Takao, Dewa, Hideki, Hanaki, Hirohumi, Hisaoka, Yoshinori, Kobayashi, Toshiaki, Matsubara, Takahiro, Mitsui, Takayuki, Mizuno, Akihiko, Suzuki, Shinsuke, Taniuchi, Tsutomu, Tomizawa, Hiromitsu, Yanagida, Kenichi
• Format: Article
• Language: English
• Subjects: Bolometer; infrared, submillimeter wave, microwave and radiowave receivers and detectors; Coherent radiation; Communication, education, history, and philosophy; Electrostatic, collective, and linear accelerators; Exact sciences and technology; Experimental methods and instrumentation for elementary-particle and nuclear physics; Fundamental areas of phenomenology (including applications); Infrared sources; Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Linear accelerator; Nuclear physics; Optical sources and standards; Optics; Physics; Physics literature and publications; Quasi-isochronous; Short-pulse; Storage ring
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/j.infrared.2007.12.013

We have demonstrated the idea of circulating a short, intense linac bunch for some tens of turns in an isochronous ring. We compressed a bunch from the SPring-8 linac to a few picoseconds rms by means of an energy compression system and a beam transport line from the linac to NewSUBARU. The NewSUBARU storage ring was set to a quasi-isochronous condition and the bunch circulated for about 50 turns after injection while maintaining the short bunch length. At the same time, a pulse train of strong coherent synchrotron oscillation from the short bunch was observed.