Title :
Low emittance operation of the SPring-8 storage ring by damping partition control
Author :
Nakamura, T. ; Ohshima, T. ; Soutome, K. ; Takao, M. ; Takano, S. ; Masaki, M. ; Suzuki, Y. ; Yamazaki, H. ; Tanaka, H. ; Hara, T. ; Kohmura, Y. ; Tanaka, Y.
Author_Institution :
JASRI/SPring-8, Hyogo, Japan
Abstract :
The SPring-8 storage ring is an 8-GeV light source and its emittance at normal operation is 6 nm with double bend achromat optics. To reduce the emittance further, we tested the control of damping partition number by changing the RF acceleration frequency to enhance the radiation damping of horizontal betatron motion and reduced the emittance to 2 nm. The emittance was estimated by several methods and the energy damping time was measured by the spectrum of the synchrotron oscillation. The measured values show good agreement with the result of the code MAD8
Keywords :
electron accelerators; particle beam diagnostics; storage rings; 8 GeV; MAD8; RF acceleration frequency; SPring-8; damping partition control; double bend achromat optics; emittance; energy damping time; horizontal betatron motion; storage ring; Damping; Energy measurement; Life estimation; Light sources; Motion control; Radio frequency; Stimulated emission; Storage rings; Testing; Time measurement;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987866
