Implementation of an in-vessel calibration light source for JET

T. M. Biewer; C. Belcher; I. Hassall; D. L. Hillis; G. Kaveney; D. Scharpf; M. F. Stamp; C. Stunell; K. D. Zastrow

doi:10.1063/1.4729502

Implementation of an in-vessel calibration light source for JET

T. M. Biewer, C. Belcher, I. Hassall, D. L. Hillis, G. Kaveney, D. Scharpf, M. F. Stamp, C. Stunell, K. D. Zastrow

Diagnostics and Control

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

12 Scopus citations

Abstract

An in-vessel calibration light source (ICLS) has been implemented for remote use during extended shutdown periods of the Joint European Torus (JET). The ICLS facilitated the in situ calibration of optical diagnostics, which previously were performed when the diagnostics were removed from JET. Since the ICLS is used to calibrate diagnostics over the entire, exact optical path as used when plasma discharge data are measured, the ICLS calibration implicitly accounts for any vignetting losses in the JET vessel viewports in addition to the vacuum window transmission. At least ten diagnostic systems have benefited from the ICLS during the extended ITER-like wall shutdown of 2009-2011. Examples of the use of the ICLS in JET are given.

Original language	English
Article number	10D505
Journal	Review of Scientific Instruments
Volume	83
Issue number	10
DOIs	https://doi.org/10.1063/1.4729502
State	Published - Oct 2012

Funding

The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was performed under the European Fusion Development Agreement, supported by the European Communities and by the U.S. Department of Energy (DOE), and carried out within the Contract of Association between EURATOM and the DOE, Contract No. DE-AC05-00OR22725. Moreover, authors gratefully acknowledge the engineering staff at Labsphere Inc. for their support.

Funders	Funder number
U.S. Department of Energy
H2020 Euratom	DE-AC05-00OR22725
European Commission

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AU - Biewer, T. M.

AU - Belcher, C.

AU - Hassall, I.

AU - Hillis, D. L.

AU - Kaveney, G.

AU - Scharpf, D.

AU - Stamp, M. F.

AU - Stunell, C.

AU - Zastrow, K. D.

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Implementation of an in-vessel calibration light source for JET

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