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Title: Interrupting an Imminent Body Current Fault and Restoring Full Power in Milliseconds on a DIII-D National Fusion Facility Gyrotron

Abstract

The ECH Group at DIII-D has installed in-house engineered, FPGA-based, high voltage reference waveform generators on its gyrotron control systems to enhance the capabilities of the systems and replace obsolete equipment. The new hardware, named D-Wavegen, outputs 16-bit signals every microsecond and can respond to events and anomalies in real-time. These generators have been reliably pausing gyrotron rf output during periods of DIII-D plasma density that exceed the fault density trip level and restarting the rf output if the density falls below the trip level. While tightly monitoring gyrotron body current and internal pressure, D-Wavegen has also been reliably restarting, in a little over 10ms, gyrotrons that spontaneously ceased rf generation.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1411886
Grant/Contract Number:
FC02-04ER54698
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 73; Journal Issue: 1; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; gyrotron fault restart; body current fault; gyrotron interlock restart

Citation Formats

Ponce, Dan, Brambila, Rigo E., Cengher, Mirela, Gorelov, Yuri A., Grosnickle, William H., Lohr, John M., and Torrezan, Antonio C.. Interrupting an Imminent Body Current Fault and Restoring Full Power in Milliseconds on a DIII-D National Fusion Facility Gyrotron. United States: N. p., 2017. Web. doi:10.1080/15361055.2017.1387009.
Ponce, Dan, Brambila, Rigo E., Cengher, Mirela, Gorelov, Yuri A., Grosnickle, William H., Lohr, John M., & Torrezan, Antonio C.. Interrupting an Imminent Body Current Fault and Restoring Full Power in Milliseconds on a DIII-D National Fusion Facility Gyrotron. United States. doi:10.1080/15361055.2017.1387009.
Ponce, Dan, Brambila, Rigo E., Cengher, Mirela, Gorelov, Yuri A., Grosnickle, William H., Lohr, John M., and Torrezan, Antonio C.. Thu . "Interrupting an Imminent Body Current Fault and Restoring Full Power in Milliseconds on a DIII-D National Fusion Facility Gyrotron". United States. doi:10.1080/15361055.2017.1387009.
@article{osti_1411886,
title = {Interrupting an Imminent Body Current Fault and Restoring Full Power in Milliseconds on a DIII-D National Fusion Facility Gyrotron},
author = {Ponce, Dan and Brambila, Rigo E. and Cengher, Mirela and Gorelov, Yuri A. and Grosnickle, William H. and Lohr, John M. and Torrezan, Antonio C.},
abstractNote = {The ECH Group at DIII-D has installed in-house engineered, FPGA-based, high voltage reference waveform generators on its gyrotron control systems to enhance the capabilities of the systems and replace obsolete equipment. The new hardware, named D-Wavegen, outputs 16-bit signals every microsecond and can respond to events and anomalies in real-time. These generators have been reliably pausing gyrotron rf output during periods of DIII-D plasma density that exceed the fault density trip level and restarting the rf output if the density falls below the trip level. While tightly monitoring gyrotron body current and internal pressure, D-Wavegen has also been reliably restarting, in a little over 10ms, gyrotrons that spontaneously ceased rf generation.},
doi = {10.1080/15361055.2017.1387009},
journal = {Fusion Science and Technology},
number = 1,
volume = 73,
place = {United States},
year = {Thu Oct 19 00:00:00 EDT 2017},
month = {Thu Oct 19 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 19, 2018
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