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Laser power meters as an X-ray power diagnostic for LCLS-II.
- Source :
-
Journal of synchrotron radiation [J Synchrotron Radiat] 2018 Jan 01; Vol. 25 (Pt 1), pp. 72-76. Date of Electronic Publication: 2018 Jan 01. - Publication Year :
- 2018
-
Abstract
- For the LCLS-II X-ray instruments, laser power meters are being developed as compact X-ray power diagnostics to operate at soft and tender X-ray photon energies. These diagnostics can be installed at various locations along an X-ray free-electron laser (FEL) beamline in order to monitor the transmission of X-ray optics along the beam path. In addition, the power meters will be used to determine the absolute X-ray power at the endstations. Here, thermopile power meters, which measure average power, and have been chosen primarily for their compatibility with the high repetition rates at LCLS-II, are evaluated. A number of characteristics in the soft X-ray range are presented including linearity, calibrations conducted with a photodiode and a gas monitor detector as well as ultra-high-vacuum compatibility tests using residual gas analysis. The application of these power meters for LCLS-II and other X-ray FEL sources is discussed.
Details
- Language :
- English
- ISSN :
- 1600-5775
- Volume :
- 25
- Issue :
- Pt 1
- Database :
- MEDLINE
- Journal :
- Journal of synchrotron radiation
- Publication Type :
- Academic Journal
- Accession number :
- 29271754
- Full Text :
- https://doi.org/10.1107/S1600577517014096