The PEP II injection kicker system

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Description

PEP II or the B Factory consists of two asymmetric storage rings. The injection energy for electrons is 9 GeV, while that for positrons is 3.1 GeV. The bend angle into the high energy ring (HER) is 0.35 m-rad, and the angle into the low energy ring (LER) is 0.575 m-rad. The magnetic length for the HER kicker is 0.85 m, and 0.55 m for the LER kicker. The field produced by the magnet is therefore 123.5 G for the HER, and 132 G for the LER. Each ring has a kicker magnet upstream of the injection line which is ... continued below

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4 p.

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Pappas, G.C.; Donaldson, A.R. & Williams, D. July 1, 1997.

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Description

PEP II or the B Factory consists of two asymmetric storage rings. The injection energy for electrons is 9 GeV, while that for positrons is 3.1 GeV. The bend angle into the high energy ring (HER) is 0.35 m-rad, and the angle into the low energy ring (LER) is 0.575 m-rad. The magnetic length for the HER kicker is 0.85 m, and 0.55 m for the LER kicker. The field produced by the magnet is therefore 123.5 G for the HER, and 132 G for the LER. Each ring has a kicker magnet upstream of the injection line which is used to distort the orbit of the stored beam. An identical magnet downstream of the injection line is used to restore the orbit of the stored beam and inject the incoming beam. The two magnets are driven in parallel by the modulator. The apeture of the magnets is 3.86x3.46 cm (HxV). Therefore the current required to drive the HER is 863 A, while for the LER it is 756 A. The inductance of the magnet is approximately 1.4 uH/m. The current pulse is a critically damped sinusoid with a rise time of less than 300 ns. A kicker system has been designed which can be used for injection of both beams by varying the charge of voltage. The modulator uses a conjugate circuit to match the impedance of the magnet, and coupling to the beam chamber.

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4 p.

Notes

INIS; OSTI as DE97007956

Source

  • 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997

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  • Other: DE97007956
  • Report No.: SLAC-PUB--7589
  • Report No.: CONF-970503--191
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 513515
  • Archival Resource Key: ark:/67531/metadc691560

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 5, 2016, 7:42 p.m.

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Pappas, G.C.; Donaldson, A.R. & Williams, D. The PEP II injection kicker system, article, July 1, 1997; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc691560/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.