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High‐brightness electron sources for a next‐generation light source based on an energy recovery linac
Author(s) -
Iijima Hokuto,
Nagai Ryoji,
Nishimori Nobuyuki,
Hajima Ryoichi
Publication year - 2011
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.21154
Subject(s) - photocathode , thermal emittance , brightness , linear particle accelerator , laser , physics , optics , electron gun , electron , ultrashort pulse , optoelectronics , cathode ray , beam (structure) , nuclear physics
A high‐brightness electron source of ultrasmall emittance and high average current is one of the most important components for next‐generation light sources based on an energy‐recovery linac (ERL). Such a high‐brightness electron source can be realized by a DC photocathode gun driven by laser pulses tailored in the temporal and spatial dimensions. We propose a novel photocathode based on a quantum cascade laser (QCL). Since the ultrafast response of photoelectron emission from QCL is compatible with the tailored laser pulses, it is a candidate electron source for ERLs. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 177(3): 46–53, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21154