Method of controlling coherent synchroton radiation-driven degradation of beam quality during bunch length compression

Patent · Tue Jul 10 00:00:00 EDT 2012

OSTI ID:1069083

Douglas, David R ^[1]; Tennant, Christopher D ^[2]

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1. Newport News, VA
2. Williamsburg, VA

A method of avoiding CSR induced beam quality defects in free electron laser operation by a) controlling the rate of compression and b) using a novel means of integrating the compression with the remainder of the transport system: both are accomplished by means of dispersion modulation. A large dispersion is created in the penultimate dipole magnet of the compression region leading to rapid compression; this large dispersion is demagnified and dispersion suppression performed in a final small dipole. As a result, the bunch is short for only a small angular extent of the transport, and the resulting CSR excitation is small.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-06OR23177
• Assignee: Jefferson Science Associates, LLC (Newport News, VA)
• Patent Number(s): 8,217,596
• Application Number: 12/381,954
• OSTI ID: 1069083
• Country of Publication: United States
• Language: English

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