CERN Accelerating science

Article
Title The Injection System of SAGA Light Source
Author(s) Iwasaki, Yoshitaka ; Koda, Shigeru ; Ohgaki, Hideaki ; Okajima, Toshihiro ; Takabayashi, Yuichi ; Tomimasu, Takio ; Yoshida, Katuhide
Affiliation (Kyoto IAE, Kyoto) ; (Saga Synchrotron Light Source, Saga City)
Publication 2005
In: 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3007
Subject category Accelerators and Storage Rings
Abstract Saga light Source is a 1.4-GeV electron storage ring with a circumference of 75.6m. The injector is a 250-MeV linac producing 1 ms macro-pulse with a peak current of 12mA and repetition rate of 1Hz. The output beam from the linac is transported though a transport line, and injected into the ring though a septum magnet with a bending angle of 20-degree. The transport line consists of two bending magnets, two quadrupole doublelets, and a quadrupole singlet. The bump orbit is formed by four kicker magnets, two of which are installed at both sides of septum magnet, and other two are positioned apart by one magnet cell of the ring. They are excited by sinusoidal electric currents with a half width of 0.5 ms. The beam optics for the injection trajectory is computed and shown at control room, the parameters for which are provided directly from the power supply control server PC. The operator is able to see real-time result of the beam trajectory calculation. This tool is quite effective to optimize the magnets parameter setting. The commissioning of the light source was started in August 2004, and 250-MeV electrons ware stored first time on November 2004.



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