A. NODA, H. FUJITA, Y. IWASHITA, A. MORITA, T. SHIRAI, T. SUGIMURA (ICR, Kyoto University)
The 100 MeV s-band disc-load type electron linac at ICR, Kyoto University has been under operation since October, 1995[1] and has been utilized for such experiments as parametric X radiation from crystal, transition radiation from dielectric material and so on. Its duty factor, however, is 2x10-5 at maximum and beam intensity is decreased during experiments in order to avoid pileup of the output signal from the radiation detector. In order to improve such a situation, stretcher operation of the electron storage ring KSR is proposed and slow beam extraction system for the purpose has been fabricated and installed into the KSR. It consists of a sextupole magnet as a third order resonance exciter, an electrostatic septum and a septum magnet as the first and second septums for slow beam extraction, respectively. In addition to these, closed-orbit control system composed of the correction coils in the dipole magnets in the lattice and a steering magnet[2]. In this paper, the present status of the stretcher operation of the 100 MeV electron linac is to be presented.
[1] T. Shirai, T. Sugimura, Y. Iwashita, S. Kakigi, H. Fujita, H. Tonguu, A. Noda and M. Inoue, 'Performance of the 100 MeV Injector Linac for the Electron Storage Ring at Kyoto University,' Proc. of the Linear Accelerator Conf., CERN, Geneva (1996) pp240-242.
[2] A. Noda, T. Shirai, H. Tonguu, T. Sugimura, Y. Iwashita, A. Morita and M. Inoue, 'Slow Beam Extraction at KSR with Combination of Third Order Resonance and RFKO,' Proc. of the 1999 Particle Accelerator Conf. New York, USA (1999) pp1294-1296.
*Work supported by Grant-in-Aid for Scientific Research from Ministry of Education, Science, Sports and Culture with contact number of 09304042.
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