A laser-Compton scattering prototype experiment at 100 MeV linac of Shanghai Institute of Applied Physics

Luo, W.; Xu, W.; Pan, Q. Y.; Cai, X. Z.; Chen, J. G.; Chen, Y. Z.; Fan, G. T.; Fan, G. W.; Guo, W.; Li, Y. J.; Liu, W. H.; Lin, G. Q.; Ma, Y. G.; Shen, W. Q.; Shi, X. C.; Xu, B. J.; Xu, J. Q.; Xu, Y.; Zhang, H. O.; Yan, Z.
January 2010
Review of Scientific Instruments;Jan2010, Vol. 81 Issue 1, p013304
Academic Journal
As a prototype of the Shanghai Laser Electron Gamma Source in the Shanghai Synchrotron Radiation Facility, an x-ray source based on laser-Compton scattering (LCS) has been installed at the terminal of the 100 MeV linac of the Shanghai Institute of Applied Physics. LCS x-rays are generated by interactions between Q-switched Nd:yttrium aluminum garnet laser pulses [with wavelength of 1064 nm and pulse width of 21 ns (full width at half maximum)] and electron bunches [with energy of 108 MeV and pulse width of 0.95 ns (rms)] at an angle of 42° between laser and electron beam. In order to measure the energy spectrum of LCS x-rays, a Si(Li) detector along the electron beam line axis is positioned at 9.8 m away from a LCS chamber. After background subtraction, the LCS x-ray spectrum with the peak energy of 29.1±4.4|stat±2.1|syst keV and the peak width (rms) of 7.8±2.8|stat±0.4|syst keV is observed. Normally the 100 MeV linac operates with the electron macropulse charge of 1.0 nC/pulse, and the electron and laser collision repetition rate of 20 Hz. Therefore, the total LCS x-ray flux of (5.2±2.0)×102 Hz can be achieved.


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