title: A compact multichannel spectrometer for Thomson scattering.
abstract: The availability of high-efficiency volume phase holographic (VPH) gratings and intensified CCD (ICCD) cameras have motivated a simplified, compact spectrometer for Thomson scattering detection. Measurements of T(e) < 100 eV are achieved by a 2971 l∕mm VPH grating and measurements T(e) > 100 eV by a 2072 l∕mm VPH grating. The spectrometer uses a fast-gated (~2 ns) ICCD camera for detection. A Gen III image intensifier provides ~45% quantum efficiency in the visible region. The total read noise of the image is reduced by on-chip binning of the CCD to match the 8 spatial channels and the 10 spectral bins on the camera. Three spectrometers provide a minimum of 12 spatial channels and 12 channels for background subtraction.
authors.affiliation: Department of Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706, USA. nschoenbeck@wisc.edu
authors.forename: N L
authors.initials: NL
authors.lastname: Schoenbeck
authors.forename: D J
authors.initials: DJ
authors.lastname: Schlossberg
authors.forename: A S
authors.initials: AS
authors.lastname: Dowd
authors.forename: R J
authors.initials: RJ
authors.lastname: Fonck
authors.forename: G R
authors.initials: GR
authors.lastname: Winz