A transmission grating spectrometer for plasma diagnostics

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Description

Radiation temperature is an important parameter in characterizing the properties of hot plasmas. In most cases this temperature is time varying caused by the short lived and/or time dependent nature of the plasma. Thus, a measurement of the radiation flux as a function of time is quite valuable. To this end the authors have developed a spectrometer that can acquire spectra with a time resolution of less than 1 ns and covers the spectral energy range from {approximately} 60 to 1,000 eV. The spectrometer consists of an entrance slit placed relatively near the plasma, a thin gold film transmission grating ... continued below

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6 p.

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Bartlett, R.J.; Hockaday, R.G.; Gallegos, C.H.; Gonzales, J.M. & Mitton, V. September 1, 1995.

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Description

Radiation temperature is an important parameter in characterizing the properties of hot plasmas. In most cases this temperature is time varying caused by the short lived and/or time dependent nature of the plasma. Thus, a measurement of the radiation flux as a function of time is quite valuable. To this end the authors have developed a spectrometer that can acquire spectra with a time resolution of less than 1 ns and covers the spectral energy range from {approximately} 60 to 1,000 eV. The spectrometer consists of an entrance slit placed relatively near the plasma, a thin gold film transmission grating with aperture, a micro channel plate (MCP) detector with a gold cathode placed at the dispersion plane and an electron lens to focus the electrons from the MCP onto a phosphor coated fiber optic plug. The phosphor (In:CdS) has a response time of {approximately} 500 ps. This detector system, including the fast phosphor is similar to one that has been previously described. The spectrometer is in a vacuum chamber that is turbo pumped to a base pressure of {approximately} 5 x 10{sup 7} torr. The light from the phosphor is coupled to two streak cameras through 100 m long fiber optic cables. The streak cameras with their CCD readouts provide the time resolution of the spectrum. The spectrometer has a built in alignment system that uses an alignment telescope and retractable prism.

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6 p.

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INIS; OSTI as DE95016883

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  • 10. Institute of Electrical and Electronics Engineers (IEEE) pulsed power conference, Albuquerque, NM (United States), 10-13 Jul 1995

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  • Other: DE95016883
  • Report No.: LA-UR--95-2439
  • Report No.: EGG--11265-5041;CONF-950750--8
  • Grant Number: W-7405-ENG-36;AC08-93NV11265
  • Office of Scientific & Technical Information Report Number: 102224
  • Archival Resource Key: ark:/67531/metadc621196

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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.

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  • September 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 26, 2016, 6:49 p.m.

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Bartlett, R.J.; Hockaday, R.G.; Gallegos, C.H.; Gonzales, J.M. & Mitton, V. A transmission grating spectrometer for plasma diagnostics, article, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc621196/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.