NDLI: Creating a pseudo single bunch at the ALS

Content Provider	IEEE Xplore Digital Library
Author	Portmann, G. Kwiatkowski, S. Plate, D. Julian, J. Low, R. Baptiste, K. Barry, W. Robin, D.
Copyright Year	2007
Description	Author affiliation: Lawrence Berkeley Nat. Lab., Berkeley (Portmann, G.; Kwiatkowski, S.; Plate, D.; Julian, J.; Low, R.; Baptiste, K.; Barry, W.; Robin, D.)
Abstract	Typically storage ring light sources operate with the maximum number of bunches as possible with a gap for ion clearing. By evenly distributing the beam current the overall beam lifetime is maximized. The advanced light source (ALS) has 2 nanoseconds between the bunches and typically operates with 276 bunches out of a possible 328. For experimenters doing timing experiment this bunch separation is too small and would prefer to see only one or two bunches in the ring. The ALS allocates four weeks every year for dedicated 2-bunch operation. In order to provide more flexible operations and substantially increase the amount of operating time for time-of-flight experimenters, it is being proposed to kick one bunch on a different vertical closed orbit. By spatially separating the light from this bunch from the main bunch train in the beamline, one could potentially have single bunch operation all year round. By putting this bunch in the middle of the ion clearing gap the required bandwidth of the kicker magnets is reduced. Using one kicker magnet running at the ring repetition rate (1.5 MHz), this bunch could be permanently put on a different closed orbit. Using multiple kicker magnets, this bunch could be locally offset at an arbitrary frequency.
Starting Page	1182
Ending Page	1184
File Size	352226
Page Count	3
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4441023
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnets Camshafts Choppers Light sources Detectors Laboratories Storage rings Timing Bandwidth Frequency
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Single bunch collective effects in the ALS

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