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Inverse Compton scattering of coherent synchrotron radiation in an energy recovery linac

Shimada, Miho*; Hajima, Ryoichi

We propose inverse Compton scattering (ICS) of coherent synchrotron radiation (CSR) from arelativistic short electron bunch in energy recovery linacs (ERL) as a high-flux subpicosecond X-ray and $$gamma$$-ray source. An advantage of the CSR scheme over a conventional ICS source is that no externallaser is required, and synchronization between CSR pulses and electron bunches is obtained automatically. Moreover, higher-flux X-rays can be generated from the ICS of CSR in an ERL operated at a highrepetition rate, 100 MHz to 1.3 GHz. Using parameters of the Compact ERL at KEK, 1$$times$$10$$^{13-14}$$ phs/sb.w. 10% X-ray with a 100 fs-1 ps pulse duration can beobtained, for an energy range from 0.04 to 4 keV. In the case of a 5-GeV ERL, $$gamma$$ rays with energy aroundtens of MeV are generated with 1$$times$$10$$^{8}$$ phs/pulse b.w. 10% at a repetition rate of several hundredsof MHz.

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Category:Physics, Nuclear

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