Sorting of bending magnets for the SSRF booster

HOU Jie; LIU Gui-Min; LI Hao-Hu; ZHANG Man-Zhou

doi:10.1088/1674-1137/32/4/009

Chinese Physics C> 2008, Vol. 32> Issue(4) : 285-289 DOI: 10.1088/1674-1137/32/4/009

Sorting of bending magnets for the SSRF booster

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Abstract：
The Shanghai Synchrotron Radiation Facility (SSRF)booster ring, a full energy injector for the storage ring, is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping. Closed orbit distortion (COD) caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting. Considering the affections of random errors in measurement, both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5 is given as the final installation sequence of the booster bending magnets in this paper.

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HOU Jie, LIU Gui-Min, LI Hao-Hu and ZHANG Man-Zhou. Sorting of bending magnets for the SSRF booster[J]. Chinese Physics C, 2008, 32(4): 285-289. doi: 10.1088/1674-1137/32/4/009

HOU Jie, LIU Gui-Min, LI Hao-Hu and ZHANG Man-Zhou. Sorting of bending magnets for the SSRF booster[J]. Chinese Physics C, 2008, 32(4): 285-289. doi: 10.1088/1674-1137/32/4/009 shu

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Received: 2007-06-13
Revised: 2007-09-17

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沈阳化工大学材料科学与工程学院沈阳 110142

Sorting of bending magnets for the SSRF booster

Corresponding author: HOU Jie,

Received Date: 2007-06-13
Accepted Date: 2007-09-17
Available Online: 2008-04-05

Abstract:

The Shanghai Synchrotron Radiation Facility (SSRF)booster ring, a full energy injector for the storage ring, is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping. Closed orbit distortion (COD) caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting. Considering the affections of random errors in measurement, both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5 is given as the final installation sequence of the booster bending magnets in this paper.