In situ wavelength calibration of the edge CXS spectrometers on JET

E. Delabie; N. Hawkes; T. M. Biewer; M. G. O'Mullane

doi:10.1063/1.4960306

In situ wavelength calibration of the edge CXS spectrometers on JET

E. Delabie, N. Hawkes, T. M. Biewer, M. G. O'Mullane

Diagnostics and Control

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

11 Scopus citations

Abstract

A method for obtaining an accurate wavelength calibration over the entire focal plane of the JET edge CXS spectrometers is presented that uses a combination of the fringe pattern created with a Fabry-Pérot etalon and a neon lamp for cross calibration. The accuracy achieved is 0.03 Å, which is the same range of uncertainty as when neglecting population effects on the rest wavelength of the CX line. For the edge CXS diagnostic, this corresponds to a flow velocity of 4.5 km/s in the toroidal direction or 1.9 km/s in the poloidal direction.

Original language	English
Article number	11E525
Journal	Review of Scientific Instruments
Volume	87
Issue number	11
DOIs	https://doi.org/10.1063/1.4960306
State	Published - Nov 1 2016

Funding

This material is based upon the work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences, under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. This work has been carried out within the framework of the Eurofusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under Grant Agreement No. 633053.

Funders	Funder number
U.S. Department of Energy
Office of Science
Fusion Energy Sciences	DE-AC05-00OR22725
Horizon 2020 Framework Programme
H2020 Euratom	633053

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10.1063/1.4960306

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abstract = "A method for obtaining an accurate wavelength calibration over the entire focal plane of the JET edge CXS spectrometers is presented that uses a combination of the fringe pattern created with a Fabry-P{\'e}rot etalon and a neon lamp for cross calibration. The accuracy achieved is 0.03 {\AA}, which is the same range of uncertainty as when neglecting population effects on the rest wavelength of the CX line. For the edge CXS diagnostic, this corresponds to a flow velocity of 4.5 km/s in the toroidal direction or 1.9 km/s in the poloidal direction.",

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AU - Hawkes, N.

AU - Biewer, T. M.

AU - O'Mullane, M. G.

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N2 - A method for obtaining an accurate wavelength calibration over the entire focal plane of the JET edge CXS spectrometers is presented that uses a combination of the fringe pattern created with a Fabry-Pérot etalon and a neon lamp for cross calibration. The accuracy achieved is 0.03 Å, which is the same range of uncertainty as when neglecting population effects on the rest wavelength of the CX line. For the edge CXS diagnostic, this corresponds to a flow velocity of 4.5 km/s in the toroidal direction or 1.9 km/s in the poloidal direction.

AB - A method for obtaining an accurate wavelength calibration over the entire focal plane of the JET edge CXS spectrometers is presented that uses a combination of the fringe pattern created with a Fabry-Pérot etalon and a neon lamp for cross calibration. The accuracy achieved is 0.03 Å, which is the same range of uncertainty as when neglecting population effects on the rest wavelength of the CX line. For the edge CXS diagnostic, this corresponds to a flow velocity of 4.5 km/s in the toroidal direction or 1.9 km/s in the poloidal direction.

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JO - Review of Scientific Instruments

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ER -

In situ wavelength calibration of the edge CXS spectrometers on JET

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