Novel energy resolving x-ray pinhole camera on Alcator C-Mod

N. A. Pablant; L. Delgado-Aparicio; M. Bitter; S. Brandstetter; E. Eikenberry; R. Ellis; K. W. Hill; P. Hofer; M. Schneebeli

doi:10.1063/1.4732177

Novel energy resolving x-ray pinhole camera on Alcator C-Mod

N. A. Pablant
, L. Delgado-Aparicio
, M. Bitter
, S. Brandstetter
, E. Eikenberry
, R. Ellis
, K. W. Hill
, P. Hofer
, M. Schneebeli

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

A new energy resolving x-ray pinhole camera has been recently installed on Alcator C-Mod. This diagnostic is capable of 1D or 2D imaging with a spatial resolution of ≈1 cm, an energy resolution of ≈1 keV in the range of 3.5-15 keV and a maximum time resolution of 5 ms. A novel use of a Pilatus 2 hybrid-pixel x-ray detector [P. Kraft, J. Synchrotron Rad. 16, 368 (2009)10.1107/S0909049509009911] is employed in which the lower energy threshold of individual pixels is adjusted, allowing regions of a single detector to be sensitive to different x-ray energy ranges. Development of this new detector calibration technique was done as a collaboration between PPPL and Dectris Ltd. The calibration procedure is described, and the energy resolution of the detector is characterized. Initial data from this installation on Alcator C-Mod is presented. This diagnostic provides line-integrated measurements of impurity emission which can be used to determine impurity concentrations as well as the electron energy distribution.

Original language	English (US)
Article number	10E526
Journal	Review of Scientific Instruments
Volume	83
Issue number	10
DOIs	https://doi.org/10.1063/1.4732177
State	Published - Oct 2012

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.4732177

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title = "Novel energy resolving x-ray pinhole camera on Alcator C-Mod",

abstract = "A new energy resolving x-ray pinhole camera has been recently installed on Alcator C-Mod. This diagnostic is capable of 1D or 2D imaging with a spatial resolution of ≈1 cm, an energy resolution of ≈1 keV in the range of 3.5-15 keV and a maximum time resolution of 5 ms. A novel use of a Pilatus 2 hybrid-pixel x-ray detector [P. Kraft, J. Synchrotron Rad. 16, 368 (2009)10.1107/S0909049509009911] is employed in which the lower energy threshold of individual pixels is adjusted, allowing regions of a single detector to be sensitive to different x-ray energy ranges. Development of this new detector calibration technique was done as a collaboration between PPPL and Dectris Ltd. The calibration procedure is described, and the energy resolution of the detector is characterized. Initial data from this installation on Alcator C-Mod is presented. This diagnostic provides line-integrated measurements of impurity emission which can be used to determine impurity concentrations as well as the electron energy distribution.",

author = "Pablant, \{N. A.\} and L. Delgado-Aparicio and M. Bitter and S. Brandstetter and E. Eikenberry and R. Ellis and Hill, \{K. W.\} and P. Hofer and M. Schneebeli",

year = "2012",

month = oct,

doi = "10.1063/1.4732177",

language = "English (US)",

volume = "83",

journal = "Review of Scientific Instruments",

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AU - Pablant, N. A.

AU - Delgado-Aparicio, L.

AU - Bitter, M.

AU - Brandstetter, S.

AU - Eikenberry, E.

AU - Ellis, R.

AU - Hill, K. W.

AU - Hofer, P.

AU - Schneebeli, M.

PY - 2012/10

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AB - A new energy resolving x-ray pinhole camera has been recently installed on Alcator C-Mod. This diagnostic is capable of 1D or 2D imaging with a spatial resolution of ≈1 cm, an energy resolution of ≈1 keV in the range of 3.5-15 keV and a maximum time resolution of 5 ms. A novel use of a Pilatus 2 hybrid-pixel x-ray detector [P. Kraft, J. Synchrotron Rad. 16, 368 (2009)10.1107/S0909049509009911] is employed in which the lower energy threshold of individual pixels is adjusted, allowing regions of a single detector to be sensitive to different x-ray energy ranges. Development of this new detector calibration technique was done as a collaboration between PPPL and Dectris Ltd. The calibration procedure is described, and the energy resolution of the detector is characterized. Initial data from this installation on Alcator C-Mod is presented. This diagnostic provides line-integrated measurements of impurity emission which can be used to determine impurity concentrations as well as the electron energy distribution.

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JF - Review of Scientific Instruments

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ER -

Novel energy resolving x-ray pinhole camera on Alcator C-Mod

Abstract

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