title: Multi-energy x-ray detector calibration for T and impurity density (n) measurements of MCF plasmas.
abstract: Soft x-ray detection with the new "multi-energy" PILATUS3 detector systems holds promise as a magnetically confined fusion (MCF) plasma diagnostic for ITER and beyond. The measured x-ray brightness can be used to determine impurity concentrations, electron temperatures, ne2Zeffproducts, and to probe the electron energy distribution. However, in order to be effective, these detectors which are really large arrays of detectors with photon energy gating capabilities must be precisely calibrated for each pixel. The energy-dependence of the detector response of the multi-energy PILATUS3 system with 100 K pixels has been measured at Dectris Laboratory. X-rays emitted from a tube under high voltage bombard various elements such that they emit x-ray lines from Zr-Lα to Ag-Kα between 1.8 and 22.16 keV. Each pixel on the PILATUS3 can be set to a minimum energy threshold in the range from 1.6 to 25 keV. This feature allows a single detector to be sensitive to a variety of x-ray energies, so that it is possible to sample the energy distribution of the x-ray continuum and line-emission. PILATUS3 can be configured for 1D or 2D imaging of MCF plasmas with typical spatial energy and temporal resolution of 1 cm, 0.6 keV, and 5 ms, respectively.
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: J
authors.initials: J
authors.lastname: Maddox
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: N
authors.initials: N
authors.lastname: Pablant
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: P
authors.initials: P
authors.lastname: Efthimion
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: L
authors.initials: L
authors.lastname: Delgado-Aparicio
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: K W
authors.initials: KW
authors.lastname: Hill
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: M
authors.initials: M
authors.lastname: Bitter
authors.affiliation: Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Reinke
authors.affiliation: DECTRIS Ltd., Taefernweg 1, 5405 Baden-Daettwil, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Rissi
authors.affiliation: DECTRIS Ltd., Taefernweg 1, 5405 Baden-Daettwil, Switzerland.
authors.forename: T
authors.initials: T
authors.lastname: Donath
authors.affiliation: DECTRIS Ltd., Taefernweg 1, 5405 Baden-Daettwil, Switzerland.
authors.forename: B
authors.initials: B
authors.lastname: Luethi
authors.affiliation: Princeton Plasma Physics Laboratory, 100 Stellarator Rd., Princeton, New Jersey 08540, USA.
authors.forename: B
authors.initials: B
authors.lastname: Stratton