Absolute calibration of Doppler coherence imaging velocity images

Samuell, C. M.; Allen, S. L.; Meyer, W. H.; Howard, J.

doi:10.1088/1748-0221/12/08/C08016

Absolute calibration of Doppler coherence imaging velocity images

Journal Article · Wed Aug 16 00:00:00 EDT 2017 · Journal of Instrumentation

DOI:https://doi.org/10.1088/1748-0221/12/08/C08016· OSTI ID:1482357

Samuell, C. M. ^[1]; Allen, S. L. ^[2]; Meyer, W. H. ^[2]; Howard, J. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Fusion Energy Sciences Program; General Atomics
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Fusion Energy Sciences Program
The Australian National Univ., Canberra (Australia). Plasma Research Lab., Research School of Physics and Engineering

Here, a new technique has been developed for absolutely calibrating a Doppler Coherence Imaging Spectroscopy interferometer for measuring plasma ion and neutral velocities. An optical model of the interferometer is used to generate zero-velocity reference images for the plasma spectral line of interest from a calibration source some spectral distance away. Validation of this technique using a tunable diode laser demonstrated an accuracy better than 0.2 km/s over an extrapolation range of 3.5 nm; a two order of magnitude improvement over linear approaches. While a well-characterized and very stable interferometer is required, this technique opens up the possibility of calibrated velocity measurements in difficult viewing geometries and for complex spectral line-shapes.

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1482357

Alternate ID(s):: OSTI ID: 22656181
OSTI ID: 1390009

Journal Information:: Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 08 Vol. 12; ISSN 1748-0221

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

References (9)

Coherence Imaging of Flows in the DIII-D Divertor Howard, J.; Diallo, A.; Creese, M. Contributions to Plasma Physics, Vol. 51, Issue 2-3 https://doi.org/10.1002/ctpp.201000062	journal	March 2011
13C transport studies in L-mode divertor plasmas on DIII-D Allen, S. L.; Wampler, W. R.; McLean, A. G. Journal of Nuclear Materials, Vol. 337-339 https://doi.org/10.1016/j.jnucmat.2004.09.066	journal	March 2005
Coherence imaging of scrape-off-layer and divertor impurity flows in the Mega Amp Spherical Tokamak (invited) Silburn, S. A.; Harrison, J. R.; Howard, J. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4891165	journal	November 2014
The pattern of parallel edge plasma flows due to pressure gradients, recycling, and resonant magnetic perturbations in DIII-D Frerichs, H.; Schmitz, O.; Evans, T. Physics of Plasmas, Vol. 22, Issue 7 https://doi.org/10.1063/1.4926524	journal	July 2015
Stokes-Doppler coherence imaging for ITER boundary tomography Howard, J.; Kocan, M.; Lisgo, S. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4963712	journal	October 2016
Time-resolved two-dimensional plasma spectroscopy using coherence-imaging techniques Howard, J.; Michael, C.; Glass, F. Plasma Physics and Controlled Fusion, Vol. 45, Issue 7 https://doi.org/10.1088/0741-3335/45/7/308	journal	May 2003
Coherence imaging spectro-polarimetry for magnetic fusion diagnostics Howard, J. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 43, Issue 14 https://doi.org/10.1088/0953-4075/43/14/144010	journal	July 2010
Coherence imaging for ion temperature and flow measurements in a low-temperature helicon plasma source Lester, R.; Zhai, Y.; Corr, C. Plasma Sources Science and Technology, Vol. 25, Issue 1 https://doi.org/10.1088/0963-0252/25/1/015025	journal	January 2016
Phase shift formulas in uniaxial media: an application to waveplates Veiras, Francisco E.; Perez, Liliana I.; Garea, María T. Applied Optics, Vol. 49, Issue 15 https://doi.org/10.1364/AO.49.002769	journal	January 2010

Cited By (7)

2D imaging of helium ion velocity in the DIII-D divertor Samuell, C. M.; Porter, G. D.; Meyer, W. H. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5017999	journal	May 2018
Tomographic analysis of tangential viewing cameras (invited) Meyer, W. H.; Allen, S. L.; Samuell, C. M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038586	journal	October 2018
Laser calibration of the DIII-D coherence imaging system Allen, S. L.; Samuell, C. M.; Meyer, W. H. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038739	journal	October 2018
Verification of Doppler coherence imaging for 2D ion velocity measurements on DIII-D Samuell, C. M.; Allen, S. L.; Meyer, W. H. Review of Scientific Instruments, Vol. 89, Issue 9 https://doi.org/10.1063/1.5039367	journal	September 2018
Coherence imaging spectroscopy at Wendelstein 7-X for impurity flow measurements Perseo, Valeria; Gradic, Dorothea; König, Ralf Review of Scientific Instruments, Vol. 91, Issue 1 https://doi.org/10.1063/1.5126098	journal	January 2020
Doppler coherence imaging of divertor and SOL flows in ASDEX upgrade and Wendelstein 7-X Gradic, D.; Ford, O. P.; Burckhart, A. Plasma Physics and Controlled Fusion, Vol. 60, Issue 8 https://doi.org/10.1088/1361-6587/aac4d2	journal	June 2018
Direct measurements of counter-streaming flows in a low-shear stellarator magnetic island topology Perseo, V.; Effenberg, F.; Gradic, D. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4320	journal	September 2019

Similar Records

A new calibration implementation for Doppler Coherence Imaging Spectroscopy

Journal Article · Wed Feb 20 19:00:00 EST 2019 · Fusion Engineering and Design · OSTI ID:1612228

New method of velocity measurement for flowing plasmas by means of Doppler shift

Technical Report · Mon Dec 31 23:00:00 EST 1973 · OSTI ID:4146048

Laser calibration of the DIII-D coherence imaging system

Journal Article · Tue Sep 25 20:00:00 EDT 2018 · Review of Scientific Instruments · OSTI ID:1545491

Related Subjects

spectroscopy and imaging
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Plasma diagnostics - charged-particle spectroscopy
Plasma diagnostics - interferometry

Absolute calibration of Doppler coherence imaging velocity images

Citation Formats

References (9)

Cited By (7)

Similar Records

Related Subjects