Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U
Abstract
Here, the upgrade to the National Spherical Torus eXperiment (NSTX-U) increases the injected neutral beam power up to 12 MW and the plasma current up to Ip = 2 MA for plasma durations up to 5 s. The graphite plasma facing components have been re-designed to handle greater heat and energy fluxes than were seen in NSTX using a castellated design. We present the experimental testing and validation of a castellated graphite target, similar to the prototype tile design, instrumented with thermocouples at various depths in the castellation. During testing, incident heat flux is provided by a programmed electron beam system and surface temperatures are measured via infrared thermography directly viewing the target surface. It was found that the thermocouple response scaled linearly with the measured surface temperature rise regardless of thermocouple depth in the castellation. A sensitivity of 14.3 °C/kJ of deposited energy was found when treating individual castellations as a semi-infinite solid.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- The Pennsylvania State Univ., State College, PA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1483183
- Alternate Identifier(s):
- OSTI ID: 1479834
- Grant/Contract Number:
- AC05-00OR22725; AC02-09CH11466; AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Gray, Travis K., Allen, Nicole, Reinke, Matthew L., Smalley, Gustav, Youchison, Dennis L., Ellis, Robert, Jaworski, M. A., Looby, Thomas, Mardenfeld, Michael, and Wolfe, Douglas E. Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U. United States: N. p., 2018.
Web. doi:10.1063/1.5039337.
Gray, Travis K., Allen, Nicole, Reinke, Matthew L., Smalley, Gustav, Youchison, Dennis L., Ellis, Robert, Jaworski, M. A., Looby, Thomas, Mardenfeld, Michael, & Wolfe, Douglas E. Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U. United States. https://doi.org/10.1063/1.5039337
Gray, Travis K., Allen, Nicole, Reinke, Matthew L., Smalley, Gustav, Youchison, Dennis L., Ellis, Robert, Jaworski, M. A., Looby, Thomas, Mardenfeld, Michael, and Wolfe, Douglas E. Tue .
"Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U". United States. https://doi.org/10.1063/1.5039337. https://www.osti.gov/servlets/purl/1483183.
@article{osti_1483183,
title = {Integrated plasma facing component calorimetry for measurement of shot integrated deposited energy in the NSTX-U},
author = {Gray, Travis K. and Allen, Nicole and Reinke, Matthew L. and Smalley, Gustav and Youchison, Dennis L. and Ellis, Robert and Jaworski, M. A. and Looby, Thomas and Mardenfeld, Michael and Wolfe, Douglas E.},
abstractNote = {Here, the upgrade to the National Spherical Torus eXperiment (NSTX-U) increases the injected neutral beam power up to 12 MW and the plasma current up to Ip = 2 MA for plasma durations up to 5 s. The graphite plasma facing components have been re-designed to handle greater heat and energy fluxes than were seen in NSTX using a castellated design. We present the experimental testing and validation of a castellated graphite target, similar to the prototype tile design, instrumented with thermocouples at various depths in the castellation. During testing, incident heat flux is provided by a programmed electron beam system and surface temperatures are measured via infrared thermography directly viewing the target surface. It was found that the thermocouple response scaled linearly with the measured surface temperature rise regardless of thermocouple depth in the castellation. A sensitivity of 14.3 °C/kJ of deposited energy was found when treating individual castellations as a semi-infinite solid.},
doi = {10.1063/1.5039337},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {Tue Oct 30 00:00:00 EDT 2018},
month = {Tue Oct 30 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
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