Implementation of an in-vessel calibration light source for JET

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4729502· OSTI ID:1043947

Biewer, Theodore M ^[1]; Belcher, C ^[2]; Hassall, I ^[2]; Hillis, D L ^[3]; Kaveney, G ^[2]; Scharpf, D ^[4]; Stamp, M F ^[5]; Zastrow, K-D ^[5]

---

1. ORNL
2. Association EURATOM-CCFE, Abingdon, UK
3. Oak Ridge National Laboratory (ORNL)
4. Labsphere, Inc.
5. EURATOM / UKAEA, UK

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1043947
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CALIBRATION
IMPLEMENTATION
LIGHT SOURCES
PLASMA
SHUTDOWN
diagnostic calibration JET plasma