Electron cyclotron emission radiometer upgrade on the Joint European Torus (JET) tokamak

Journal Article · Fri Oct 01 00:00:00 EDT 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1781376· OSTI ID:20641165

Luna, E de la; Sanchez, J; Tribaldos, V; Conway, G; Suttrop, W; Fessey, J; Prentice, R; Gowers, C; Chareau, J M ^[1]

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1. Asociacion EURATOM-CIEMAT para Fusion, CIEMAT, Madrid (Spain)

The capabilities of the Joint European Torus (JET) electron cyclotron emission (ECE) diagnostics have recently been extended with an upgrading of the heterodyne radiometer. The number of channels has been doubled to 96 channels, with a frequency separation corresponding to <1 cm for JET magnetic field gradient, and with a frequency response of 1 MHz. This enhancement has increased the radial coverage of the ECE electron temperature measurements in JET to approximately the full plasma column (limited at R>2.6 m for the X-mode due to harmonic overlap) at almost all magnetic field values used at JET (1.7 T<B{sub T}<4 T), while maintaining the high sensitivity and spectral resolution of the previous system. In this paper an overview of the upgraded radiometer is presented along with some results showing its performance.

• OSTI ID: 20641165
• Journal Information: Review of Scientific Instruments, Vol. 75, Issue 10; Conference: 15. topical conference on high temperature plasma diagnostics, San Diego, CA (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1781376; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); JET-EFDA Contributors; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYCLOTRONS
ELECTRON TEMPERATURE
ION TEMPERATURE
JET TOKAMAK
MAGNETIC FIELDS
MHZ RANGE 01-100
PERFORMANCE
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA JETS
RADIOMETERS
SENSITIVITY