IPAC'10 - List of Authors (Di Monte, N.P.)

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Di Monte, N.P.

Paper	Title	Page
WEPEB049	Recent Progress of the Bunch-by-bunch Feedback System at the Advanced Photon Source	2803
	C. Yao, N.P. Di Monte, V. Sajaev ANL, Argonne
	A bunch-by-bunch feedback system was installed at the APS in 2008. Close-loop tests were conducted and improvements have been made to the system that include two 500-watt amplifiers, a new location for the horizontal drive stripline, a two-blade new horizontal stripline, and upgrade of front-end electronics. With these improvements we are able to stabilize beam with a reduced chromaticity of 0.45 in the horizontal plane and 2.5 in the vertical plane for the 24-singlet bunch pattern. Beam lifetime has increased from 8.5 hours to 15 hours. We did not observe any obvious increase in the effective beam emittance and rms beam motion. More studies will be performed to explore the potential of improving beam performance of the hybrids fill pattern, which has a 16-mA leading bunch. We report the system improvements and the results of our test results. cyao@aps.anl.gov

Paper

Title

Page

WEPEB049

Recent Progress of the Bunch-by-bunch Feedback System at the Advanced Photon Source

2803

C. Yao, N.P. Di Monte, V. Sajaev
ANL, Argonne

A bunch-by-bunch feedback system was installed at the APS in 2008. Close-loop tests were conducted and improvements have been made to the system that include two 500-watt amplifiers, a new location for the horizontal drive stripline, a two-blade new horizontal stripline, and upgrade of front-end electronics. With these improvements we are able to stabilize beam with a reduced chromaticity of 0.45 in the horizontal plane and 2.5 in the vertical plane for the 24-singlet bunch pattern. Beam lifetime has increased from 8.5 hours to 15 hours. We did not observe any obvious increase in the effective beam emittance and rms beam motion. More studies will be performed to explore the potential of improving beam performance of the hybrids fill pattern, which has a 16-mA leading bunch. We report the system improvements and the results of our test results.

cyao@aps.anl.gov