Doubled Nd-glass laser system for incoherent Thomson scattering from low density plasmas

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Description

Conventional Thomson scattering using a ruby laser evidences difficulty in scattered signal detection as electron densities drop below 10/sup 13/ cm/sup -3/. Studies of plasmas of interest, such as theta-pinch endloss flow, can require density resolution in that range. Use of a Nd-Glass Laser as a source and frequency doubling the output can result in increases in the incident energy and quantum efficiency of the detectors such that gains in scattered signal of greater than an order of magnitude over a conventional ruby laser system can be achieved. Due to the approx. 25A bandwidth of the Nd-Glass Laser line, however, ... continued below

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Pages: 12

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Jacoby, B.A.; York, T.M. & Mollo, R.A. February 1, 1979.

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Description

Conventional Thomson scattering using a ruby laser evidences difficulty in scattered signal detection as electron densities drop below 10/sup 13/ cm/sup -3/. Studies of plasmas of interest, such as theta-pinch endloss flow, can require density resolution in that range. Use of a Nd-Glass Laser as a source and frequency doubling the output can result in increases in the incident energy and quantum efficiency of the detectors such that gains in scattered signal of greater than an order of magnitude over a conventional ruby laser system can be achieved. Due to the approx. 25A bandwidth of the Nd-Glass Laser line, however, the electron temperature information in the incoherent scattered signal must be extracted from a Voight profile, not from the usual Gaussian profile as when a ruby laser is used.

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Pages: 12

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Dep. NTIS, PC A02/MF A01.

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  • Report No.: COO-4020-8
  • Grant Number: EY-76-S-02-4020
  • DOI: 10.2172/6132813 | External Link
  • Office of Scientific & Technical Information Report Number: 6132813
  • Archival Resource Key: ark:/67531/metadc1106818

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • February 1, 1979

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 22, 2018, 9:14 p.m.

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Jacoby, B.A.; York, T.M. & Mollo, R.A. Doubled Nd-glass laser system for incoherent Thomson scattering from low density plasmas, report, February 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1106818/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.