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Optimizing a Thomson scattering diagnostic for fast dynamics and high background
The Madison Symmetric Torus (MST) presents challenging conditions for Thomson scattering (TS) measurements. The MST plasmas are reversed-field pinches (RFPs) with electron density ne<3×1013&n...
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Thomson scattering density calibration by Rayleigh and rotational Raman scattering on NSTX
The multipoint Thomson scattering diagnostic measures the profiles of the electron temperature Te(R) and density ne(R) on the horizontal midplane of NSTX. Normal operation makes use of Rayleigh scatte...

A pulse-burst laser system for a high-repetition-rate Thomson scattering diagnostic

Rev. Sci. Instrum. 79, 10E736 (2008); doi:10.1063/1.2965733

Published 31 October 2008

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D. J. Den Hartog,1 N. Jiang,2 and W. R. Lempert2
1Department of Physics and Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
2Department of Mechanical Engineering, The Ohio State University, Columbus, Ohio 43210, USA
A “pulse-burst” laser system is being constructed for addition to the Thomson scattering diagnostic on the Madison Symmetric Torus (MST) reversed-field pinch. This laser is designed to produce a burst of up to 200 approximately 1  J Q-switched pulses at repetition frequencies 5–250  kHz. This laser system will operate at 1064  nm and is a master oscillator, power amplifier. The master oscillator is a compact diode-pumped Nd:YVO4 laser, intermediate amplifier stages are flashlamp-pumped Nd:YAG, and final stages will be flashlamp-pumped Nd:glass (silicate). Variable pulse width drive (0.3–20  ms) of the flashlamps is accomplished by insulated-gate bipolar transistor switching of large electrolytic capacitor banks. The burst train of laser pulses will enable the study of electron temperature (Te) and electron density (ne) dynamics in a single MST shot, and with ensembling, will enable correlation of Te and ne fluctuations with other fluctuating quantities. ©2008 American Institute of Physics
History: Presented 13 May 2008; received 10 May 2008; accepted 7 July 2008; published 31 October 2008
Permalink: http://link.aip.org/link/?RSINAK/79/10E736/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.62.Eh
    Metrological applications of lasers
  • 52.58.Lq
    Z-pinches, plasma focus and other pinch devices
  • 42.60.Gd
    Q-switching
  • 42.70.Ce
    Optical glasses, quartz
  • 52.70.Kz
    Optical (ultraviolet, visible, infrared) plasma diagnostic measurements
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
Publisher:
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REFERENCES (20)
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