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 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. In this paper, the present status of the stretcher operation of the 100 MeV electron linac is to be presented.
 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.
 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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