A real-time velocity diagnostic for NSTX

Journal Article · Thu Mar 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3692752· OSTI ID:22072260

Podesta, M; Bell, R E ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

A new system for fast measurements of the plasma toroidal velocity has been installed on the National Spherical Torus Experiment, NSTX [M. Ono et al., Nucl. Fusion 40, 557 (2000)]. The diagnostic, based on active charge-exchange recombination spectroscopy, can measure at up to six radial locations with maximum sampling rate of 5 kHz. The system is interfaced in real time with the NSTX plasma control system, in order to feed back on plasma velocity by means of actuators such as neutral beams and external coils. The paper describes the design criteria and implementation of the diagnostic. Examples from the initial tests of the system during neon glows are also discussed.

• OSTI ID: 22072260
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 3; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACTUATORS
CHARGE EXCHANGE
CONTROL SYSTEMS
KHZ RANGE
NEON
NSTX DEVICE
PARTICLE BEAMS
PLASMA
PLASMA DIAGNOSTICS
RECOMBINATION
SAMPLING
SPECTROSCOPY
VELOCITY