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A novel, cost-effective, multi-point Thomson scattering system on the Pegasus Toroidal Experiment (invited)
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, D. J. Schlossberg
, G. M. Bodner
, J. A. Reusch
, M. W. Bongard
, R. J. Fonck
, and C. Rodriguez Sanchez
, Public data set: A novel, cost-effective, multi-point Thomson scattering system on the Pegasus Toroidal Experiment, 2016, available at https://dx.doi.org/10.18138/1257860
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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 ∼103 reduction in background light enables further expansion to up to 24 spatial locations. The implementation now provides single-shot Te(R) for ne > 5 × 1018 m−3.
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