Experiment of RF modulation at HLS

HUANG Gui-Rong; XU Hong-Liang; LIU Gong-Fa

Chinese Physics C> 2006, Vol. 30> Issue(6) : 559-561

Experiment of RF modulation at HLS

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

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Abstract：
The Experiment of RF modulation at the HLS(Hefei Light Source) is introduced. The 4%—8% AM(Amplitude Modulation) or the 2°—3° PM(Phase Modulation) with the modulated frequency closed to the longitudinal synchrotron oscillation frequency improves the beam lifetime. The experiment also finds out the intensity of the beam spectrum reduced after applying the RF modulation, which shows that the modulation is useful for suppressing the coupled-bunch instability.

References

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. Ng King-Yuan. Physics of Collective Beam Instabilities. US Particle Accelerator School. New York, June 2000, 177—1812. Ellison J A, Shih H J. Phys. Rev., 1994, E49: 24843. Sakanaka S. Phys. Rev., 2000, 3: 0507014. Annual Report of Pohang Light Source. 2002—2003, 50—515. WANG Min-Huey, CHANG L H, CHANG P et al. Effectof RF Phase Modulation on the Longitudinal Beam Dynamics. PAC97. Vancouver, 1997. 1487—14896. Kuske P. Emittance Manipulations at BESSY I. Proc. ofEPAC98. Stockholm, 19987. WANG Min-Huey, CHANG P, CHOU P J et al. Experiment of RF voltage Modulation at SRRC. PAC(99). NewYork, 19998. Senichev Y, Hertel N, Lunt S et al. Increasing the Life Time of SR Sources by RF Phase Modulation. EPAC(98). Stockholm, 1998

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HUANG Gui-Rong, XU Hong-Liang and LIU Gong-Fa. Experiment of RF modulation at HLS[J]. Chinese Physics C, 2006, 30(6): 559-561.

HUANG Gui-Rong, XU Hong-Liang and LIU Gong-Fa. Experiment of RF modulation at HLS[J]. Chinese Physics C, 2006, 30(6): 559-561. shu

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Received: 2005-09-07
Revised: 2005-11-28

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