Study of expected performance of the hard X-ray beam for the FEL-X project

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 483; no. 1; pp. 429 - 433
• Main Authors: Sei, N., Yamada, K., Ohgaki, H., Mikado, T., Yasumoto, M., Ogawa, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2002
• Subjects: Free electron laser; Hard X-ray; Laser Compton backscattering; Storage ring; Free electron laser; Hard X-ray; Storage ring; Laser Compton backscattering; 40.60.Cr
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(02)00356-X

We advance the FEL-X project and plan to install a new optical klystron for the infrared FELs within next year. The expected FEL gain at a wavelength of 10.6
μm is over 2% with the present electron-beam qualities in the storage ring NIJI-IV. Infrared FELs based on the fundamental and higher harmonics from the new optical klystron will generate hard X-ray beams with an energy of 0.1–2
MeV by the FEL-Compton backscattering process. Conventional light sources cannot provide sufficient amounts of photons in this energy region. The expected yield of the hard X-ray beam is 10
5–10
6 per second with an energy spread of 3%.