期刊
JOURNAL OF SYNCHROTRON RADIATION
卷 22, 期 -, 页码 606-611出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600577515006098
关键词
FEL; diagnostics; pulse energy detector
A gas monitor detector was implemented and characterized at the Soft X-ray Research (SXR) instrument to measure the average, absolute and pulse-resolved photon flux of the LCLS beam in the energy range between 280 and 2000 eV. The detector is placed after the monochromator and addresses the need to provide reliable absolute pulse energy as well as pulse-resolved measurements for the various experiments at this instrument. This detector provides a reliable non-invasive measurement for determining flux levels on the samples in the downstream experimental chamber and for optimizing signal levels of secondary detectors and for the essential need of data normalization. The design, integration into the instrument and operation are described, and examples of its performance are given.
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