Use Of Jefferson Lab's High Average Power FEL as a Thomson Backscatter X-ray Source

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Recently, workers from Berkeley have measured Thomson forward scattered X-rays at the ALS injector. The average power of their device was limited by, among other things, the repetition rate of the high power laser. In order to achieve high average power, it is natural to investigate the possibility of backscatter from the recirculating optical pulses in Jefferson Lab's CW IRFEL, now under construction. Photon brightnesses of order 10{sup 7} photons/(sec mm{sup 2} mrad{sup 2}) will be produced at this facility, with a spectrum extending up to 7 keV in energy, in the present operating mode. A near-term upgrade to 75 ... continued below

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69 Kilobytes pages

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Krafft, G.A. May 1, 1997.

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Recently, workers from Berkeley have measured Thomson forward scattered X-rays at the ALS injector. The average power of their device was limited by, among other things, the repetition rate of the high power laser. In order to achieve high average power, it is natural to investigate the possibility of backscatter from the recirculating optical pulses in Jefferson Lab's CW IRFEL, now under construction. Photon brightnesses of order 10{sup 7} photons/(sec mm{sup 2} mrad{sup 2}) will be produced at this facility, with a spectrum extending up to 7 keV in energy, in the present operating mode. A near-term upgrade to 75 MeV yields about 30 keV photons with similar brightness. In the longer term, the UV upgrade of our device could potentially produce 4 MeV photons with substantially higher brightness. Scaling laws for such configurations are given and these three cases are presented in detail.

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69 Kilobytes pages

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  • PAC '97, Vancouver, British Columbia (CA), 05/12/1997--05/18/1997

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  • Report No.: JLAB-ACC-97-44
  • Report No.: DOE/ER/40150-1823
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 776936
  • Archival Resource Key: ark:/67531/metadc715311

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  • May 1, 1997

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 9:50 p.m.

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Krafft, G.A. Use Of Jefferson Lab's High Average Power FEL as a Thomson Backscatter X-ray Source, article, May 1, 1997; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc715311/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.