title: A novel, cost-effective, multi-point Thomson scattering system on the Pegasus Toroidal Experiment (invited).
abstract: A novel, cost-effective, multi-point Thomson scattering system has been designed, implemented, and operated on the Pegasus Toroidal Experiment. Leveraging advances in Nd:YAG lasers, high-efficiency volume phase holographic transmission gratings, and increased quantum-efficiency Generation 3 image-intensified charge coupled device (ICCD) cameras, the system provides Thomson spectra at eight spatial locations for a single grating/camera pair. The on-board digitization of the ICCD camera enables easy modular expansion, evidenced by recent extension from 4 to 12 plasma/background spatial location pairs. Stray light is rejected using time-of-flight methods suited to gated ICCDs, and background light is blocked during detector readout by a fast shutter. This ∼103reduction in background light enables further expansion to up to 24 spatial locations. The implementation now provides single-shot Te(R) for ne> 5 × 1018m-3.
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Schlossberg
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: G M
authors.initials: GM
authors.lastname: Bodner
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Bongard
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Fonck
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Reusch
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: C
authors.initials: C
authors.lastname: Rodriguez Sanchez