Optical and Mechanical Design of C-Mod Motional Stark Effect Diagnostic Metadata

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  • Main Title Optical and Mechanical Design of C-Mod Motional Stark Effect Diagnostic


  • Author: Simon, D.I.
    Creator Type: Personal
  • Author: Marmar, E.
    Creator Type: Personal
  • Author: Bretz, N.L.
    Creator Type: Personal
  • Author: Bravenec, R.
    Creator Type: Personal
  • Author: Parsells, R.F.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy. Office of Energy Research.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Energy Research (ER) (United States)


  • Name: Princeton University. Plasma Physics Laboratory.
    Place of Publication: Princeton, New Jersey
    Additional Info: Princeton Plasma Physics Lab., NJ (United States)


  • Creation: 1999-11-01


  • English


  • Content Description: A Motional Stark Effect (MSE) instrument is being installed on the Alcator C-Mod tokamak at MIT. This MSE diagnostic will provide measurements of the spatial profile of the internal poloidal magnetic field. The MSE has its primary collection optics inside the vacuum vessel. The light collected by the internal optics passes through a vacuum window and is relayed to a fiber optic array. The MSE optics are shared by a Beam Emission Spectroscopy (BES) diagnostic which measures electron density fluctuations and their spatial correlations. This optical system requires high throughput and spatial resolution of less than 1 cm at the focal plane in the plasma. The design requirements for the internal optics also include the effects associated with plasma impingement, plasma disruptions, and thermal excursions. The parameters that affect polarization measurement include the location and orientation of optical elements, the choice of substrates and optical materials. These unique design requirements led to a number of interesting optical and mechanical design features which are presented here.
  • Physical Description: 154 Kilobytes pages


  • Keyword: Alcator Device
  • Keyword: Magnetic Fields
  • Keyword: Emission Spectroscopy
  • STI Subject Categories: 70 Plasma Physics And Fusion Technology
  • Keyword: Electron Density
  • Keyword: Fiber Optics
  • Keyword: Optical Systems
  • Keyword: Measuring Instruments
  • Keyword: Plasma Disruption
  • Keyword: Diagnostic Techniques
  • Keyword: Design
  • Keyword: Stark Effect
  • Keyword: Spatial Resolution


  • Other Information: PBD: 1 Nov 1999


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


  • Report No.: PPPL-3383
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/14501
  • Office of Scientific & Technical Information Report Number: 14501
  • Archival Resource Key: ark:/67531/metadc620759


  • Display Note: INIS; OSTI as DE00014501