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Nonperturbing field profile measurements of a sustained spheromak
In this article we discuss the measurement of the field profile in the sustained spheromak physics experiment (SSPX). We have built a transient internal probe (TIP) diagnostic to measure the internal ...
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The multichord far infrared polarimeter of the RFX experiment
A multichannel far infrared (FIR) polarimeter has been installed on the reversed field experiment (RFX) to measure the poloidal magnetic field profile, B. The polarimeter uses a FIR laser (= 118.8 &m...

Density and Halpha diagnostics and results for the sustained spheromak physics experiment

Rev. Sci. Instrum. 72, 1059 (2001); doi:10.1063/1.1319364

Issue Date: January 2001

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Zhehui Wang, G. A. Wurden, Cris W. Barnes, and C. J. Buchenauer
Los Alamos National Laboratory, Los Alamos, New Mexico 87545

H. S. McLean, D. N. Hill, E. B. Hooper, R. D. Wood, and S. Woodruff
Lawrence Livermore National Laboratory, Livermore, California 94550
A newly installed density diagnostic using CO2 laser interferometry and an Halpha diagnostic using interference filters and photomultiplier tubes for the recently constructed sustained spheromak physics experiment (SSPX) are described. First diagnostic results of the Halpha diagnostic were useful to understand the breakdown physics in the new SSPX experiments. Low-noise density data validates techniques to reduce vibration and electronic pickup. The data-processing electronics of the new interferometer can yield unambiguous density data that is equivalent to 16 fringe shifts. Density data is also critical to understand the particle source, and the J/ne parameter for SSPX.
History: Presented 21 June 2000
Permalink: http://link.aip.org/link/?RSINAK/72/1059/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.70.Kz
    Physics of plasmas and electric discharges Plasma diagnostic techniques and instrumentation Optical (ultraviolet, visible, infrared) measurements
  • 52.55.Hc
    Physics of plasmas and electric discharges Magnetic confinement and equilibrium Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices
  • 07.60.Ly
    Instruments, apparatus, and components common to several branches of physics and astronomy Optical instruments and equipment Interferometers
  • 42.62.Eh
    Optics Laser applications Metrological applications
  • 85.60.Ha
    Electronic and magnetic devices; microelectronics Optoelectronic devices Photomultipliers; phototubes and photocathodes
  • YEAR: 2001

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
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REFERENCES (10)
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