A novel, cost-effective, multi-point Thomson scattering system on the Pegasus Toroidal Experiment (invited)

Schlossberg, David J.; Bodner, Grant M.; Bongard, Michael W.; Fonck, Raymond J.; Reusch, Joshua A.; Rodriguez Sanchez, Cuauhtemoc

doi:10.1063/1.4962193

A novel, cost-effective, multi-point Thomson scattering system on the Pegasus Toroidal Experiment (invited)

Journal Article · Fri Sep 16 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4962193· OSTI ID:1334080

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Univ. of Wisconsin-Madison, Madison, WI (United States); University of Wisconsin-Madison
Univ. of Wisconsin-Madison, Madison, WI (United States)

Here, 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 T_e(R) for n_e > 5 × 10¹⁸ m^–3.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Wisconsin-Madison, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: FG02-96ER54375

OSTI ID:: 1334080

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (15)

Public Data Set: A Novel, Cost-Effective, Multi-Point Thomson Scattering System on the Pegasus Toroidal Experiment Schlossberg, D. J.; Bodner, G. M.; Reusch, J. A. AIP - Review of Scientific Instruments, Vol. 87, Issue 11, 49.6 MB https://doi.org/10.18138/1257860	dataset	September 2016
Public Data Set: Continuous, Edge Localized Ion Heating During Non-Solenoidal Plasma Startup and Sustainment in a Low Aspect Ratio Tokamak Burke, Marcus; Barr, Jayson; Bongard, Michael https://doi.org/10.18138/1336395	dataset	January 2017
Public Data Set: A Power-Balance Model for Local Helicity Injection Startup in a Spherical Tokamak Barr, J. L.; Bongard, M. W.; Burke, M. G. Pegasus Public Data Sets https://doi.org/10.18138/1345037	dataset	May 2018
Public Data Set: Non-inductively Driven Tokamak Plasmas at Near-Unity βt in the Pegasus Toroidal Experiment Reusch, Joshua; Bodner, Grant; Bongard, Michael Pegasus-Supplementary information for journal article at DOI: 10.1063/1.5017966, 1 file (5.1 MB) https://doi.org/10.18138/1410490	dataset	March 2018
Public Data Set: Initiation and Sustainment of Tokamak Plasmas with Local Helicity Injection as the Majority Current Drive Perry, Justin; Bodner, Grant; Bongard, Michael Pegasus-Supplementary information for journal article at DOI: https://doi.org/10.1088/1741-4326/aac72e, 1 file (17.1 MB) https://doi.org/10.18138/1419641	dataset	July 2018
Public Data Set: Radially Scanning Magnetic Probes to Study Local Helicity Injection Dynamics Richner, Nathan; Bongard, Michael; Fonck, Raymond Pegasus-Supplementary information for journal article at DOI: 10.1063/1.5036527, 1 file (9.4 MB) https://doi.org/10.18138/1432455	dataset	July 2018
Public Data Set: Advancing Local Helicity Injection for Non-Solenoidal Tokamak Startup Bongard, Michael; Bodner, Grant; Burke, Marcus University of Wisconsin-Madison https://doi.org/10.18138/1489772	dataset	January 2019
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A Thomson scattering diagnostic on the Pegasus Toroidal experiment Schlossberg, D. J.; Schoenbeck, N. L.; Dowd, A. S. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4733560	journal	October 2012
Initial implementation of a Thomson scattering diagnostic for Proto-MPEX Biewer, T. M.; Shaw, G. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4886959	journal	November 2014
Thomson scattering diagnostic system design for the Compact Toroidal Hybrid experiment Traverso, P. J.; Maurer, D. A.; Ennis, D. A. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4892161	journal	November 2014
Control and automation of the Pegasus multi-point Thomson scattering system Bodner, G. M.; Bongard, M. W.; Fonck, R. J. Review of Scientific Instruments, Vol. 87, Issue 11, Article No. 11E523 https://doi.org/10.1063/1.4960499	journal	August 2016
Progress on Thomson scattering in the Pegasus Toroidal Experiment Schlossberg, D. J.; Bongard, M. W.; Fonck, R. J. Journal of Instrumentation, Vol. 8, Issue 11 https://doi.org/10.1088/1748-0221/8/11/C11019	journal	November 2013
High Confinement Mode and Edge Localized Mode Characteristics in a Near-Unity Aspect Ratio Tokamak Thome, K. E.; Bongard, M. W.; Barr, J. L. Physical Review Letters, Vol. 116, Issue 17, Article No. 175001 https://doi.org/10.1103/PhysRevLett.116.175001	journal	April 2016

Cited By (10)

Public Data Set: A Novel, Cost-Effective, Multi-Point Thomson Scattering System on the Pegasus Toroidal Experiment Schlossberg, D. J.; Bodner, G. M.; Reusch, J. A. AIP - Review of Scientific Instruments, Vol. 87, Issue 11, 49.6 MB https://doi.org/10.18138/1257860	dataset	September 2016
Public Data Set: Continuous, Edge Localized Ion Heating During Non-Solenoidal Plasma Startup and Sustainment in a Low Aspect Ratio Tokamak Burke, Marcus; Barr, Jayson; Bongard, Michael https://doi.org/10.18138/1336395	dataset	January 2017
Public Data Set: A Power-Balance Model for Local Helicity Injection Startup in a Spherical Tokamak Barr, J. L.; Bongard, M. W.; Burke, M. G. Pegasus Public Data Sets https://doi.org/10.18138/1345037	dataset	May 2018
Public Data Set: Non-inductively Driven Tokamak Plasmas at Near-Unity βt in the Pegasus Toroidal Experiment Reusch, Joshua; Bodner, Grant; Bongard, Michael Pegasus-Supplementary information for journal article at DOI: 10.1063/1.5017966, 1 file (5.1 MB) https://doi.org/10.18138/1410490	dataset	March 2018
Public Data Set: Initiation and Sustainment of Tokamak Plasmas with Local Helicity Injection as the Majority Current Drive Perry, Justin; Bodner, Grant; Bongard, Michael Pegasus-Supplementary information for journal article at DOI: https://doi.org/10.1088/1741-4326/aac72e, 1 file (17.1 MB) https://doi.org/10.18138/1419641	dataset	July 2018
Public Data Set: Radially Scanning Magnetic Probes to Study Local Helicity Injection Dynamics Richner, Nathan; Bongard, Michael; Fonck, Raymond Pegasus-Supplementary information for journal article at DOI: 10.1063/1.5036527, 1 file (9.4 MB) https://doi.org/10.18138/1432455	dataset	July 2018
Public Data Set: Spatial Heterodyne Spectroscopy for High Speed Measurements of Stark Split Neutral Beam Emission in a High Temperature Plasma Burke, Marcus; Fonck, Raymond; McKee, George University of Wisconsin-Madison https://doi.org/10.18138/1435641	dataset	January 2018
Public Data Set: Advancing Local Helicity Injection for Non-Solenoidal Tokamak Startup Bongard, Michael; Bodner, Grant; Burke, Marcus University of Wisconsin-Madison https://doi.org/10.18138/1489772	dataset	January 2019
Non-inductively driven tokamak plasmas at near-unity βt in the P egasus toroidal experiment Reusch, J. A.; Bodner, G. M.; Bongard, M. W. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5017966	journal	May 2018
Noninductively Driven Tokamak Plasmas at Near-Unity Toroidal Beta Schlossberg, D. J.; Bodner, G. M.; Bongard, M. W. Physical Review Letters, Vol. 119, Issue 3, Article No. 035001 https://doi.org/10.1103/physrevlett.119.035001	journal	July 2017