Note: Spectral motional Stark effect diagnostic for measurement of magnetic fields below 0.3 T

Journal Article · Thu Aug 15 04:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4817644· OSTI ID:22220478

Lizunov, A.; Donin, A. ^[1]; Savkin, V. ^[1]

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1. Budker Institute of Nuclear Physics, 630090 Novosibirsk (Russian Federation)

The paper reports on development of the spectral motional Stark effect (MSE) diagnostic in the midplane of the gas dynamic trap (GDT) linear system for magnetic confinement of anisotropic hot-ion plasma. The axially symmetric GDT vacuum magnetic field has a minimum value in the midplane, which varies from 0.2 to 0.35 T in different regimes of operation. Buildup of 15 keV ion population generates a diamagnetic reduction of magnetic field in the plasma core of up to 30% in the maximum density region, as measured by the existing eight-line MSE diagnostic. Commissioning of the midplane MSE provided first direct measurements of diamagnetic modifications in the minimum magnetic field GDT section, a necessary complement to the understanding of equilibrium and self-organization of high-β plasmas in GDT. Making use of the stable short-pulse diagnostic beam and calibration of the apparent spectral width of beam emission lines allow for the measurement of the plasma magnetic field of 0.29 ± 0.007 T with the integration time of 200 μs.

• OSTI ID: 22220478
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 84; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
BEAMS
CALIBRATION
COMMISSIONING
DENSITY
DIAMAGNETISM
IONS
KEV RANGE
MAGNETIC CONFINEMENT
MAGNETIC FIELDS
PLASMA DIAGNOSTICS
STARK EFFECT