Prospects of an X-ray FEL Oscillator driven by a SCRF linac or on a by-pass of a MBA Storage Ring

Not scheduled
40m
Conference Hall (Budker INP)

Conference Hall

Budker INP

Lavrentiev av. 11, Novosibirsk 630090 Russia
Invited Oral SR and FEL sources and centers

Speaker

Prof. Kwang-Je Kim (University of Chicago)

Description

An X-ray FEL Oscillator (XFELO), a low-gain device in which an X-ray pulse trapped in a X-ray cavity formed by Bragg crystals receives repeated FEL interaction will broaden the scientific vista for photon science of hard X-rays in areas requiring fully coherent and ultra-fine spectral bandwidth (BW). A 7-8 GeV super-conducting linear accelerator producing a constant stream of electron bunches is an ideal driver for an XFELO. With an optimized injector, it can produce fully coherent X-ray pulses with 3 meV BW and time averaged brightness 1028 photons/s/(mm-mr)2/0.1% BW at 14.4 keV, which is higher by three orders of magnitude expected from LCLS-II-HE. By using a transverse gradient undulator (TGU), an XFELO is also feasible in a bypass of a large storage ring with multi-bend achromats, an “ultimate storage ring (USR) such as PETRA-4. Due to the beam cooling requirement, the ring-based XFELO will need to be operated in a pulsed mode with ~1% duty factor. On the other hand, the X-ray BW could be an order of magnitude smaller than that based on a linac.

Primary author

Prof. Kwang-Je Kim (University of Chicago)

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