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Title: Enhanced visible and near-infrared capabilities of the JET mirror-linked divertor spectroscopy system

The mirror-linked divertor spectroscopy diagnostic on JET has been upgraded with a new visible and near-infrared grating and filtered spectroscopy system. New capabilities include extended near-infrared coverage up to 1875 nm, capturing the hydrogen Paschen series, as well as a 2 kHz frame rate filtered imaging camera system for fast measurements of impurity (Be II) and deuterium Dα, Dβ, Dγ line emission in the outer divertor. The expanded system provides unique capabilities for studying spatially resolved divertor plasma dynamics at near-ELM resolved timescales as well as a test bed for feasibility assessment of near-infrared spectroscopy.
Authors:
;  [1] ; ; ; ; ;  [2] ;
  1. Centre for Advanced Instrumentation, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)
  2. EURATOM/CCFE Fusion Association, Culham Science Center, Abingdon OX14 3DB (United Kingdom)
Publication Date:
OSTI Identifier:
22303717
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABSORPTION SPECTROSCOPY; CAMERAS; DEUTERIUM; DIVERTORS; EDGE LOCALIZED MODES; GRATINGS; HYDROGEN; INFRARED SPECTRA; JET TOKAMAK; KHZ RANGE 01-100; NEAR INFRARED RADIATION; PASCHEN LINES; PLASMA IMPURITIES