Initial testing of optical arc detector inside 285/300 fast wave antenna box on DIII-D

S. J. Diem; D. T. Fehling; D. L. Hillis; A. R. Horton; A. Nagy; R. I. Pinsker; E. A. Unterberg

doi:10.13182/FST13-A19147

Initial testing of optical arc detector inside 285/300 fast wave antenna box on DIII-D

S. J. Diem, D. T. Fehling, D. L. Hillis, A. R. Horton, A. Nagy, R. I. Pinsker, E. A. Unterberg

Research output: Contribution to journal › Article › peer-review

Abstract

Locating arcs within the fast wave current drive system is necessary to improve antenna performance and coupling to the plasma. Previously, there had been no way to observe arcs inside the vacuum vessel in an ICRF antenna on DIII-D. A new diagnostic that uses photomultiplier tubes has been installed for the 2012 run campaign on the 285/300 antenna of the fast wave system. The diagnostic has top and bottom views of the back of the four antenna straps and uses narrow-bandpass visible filters to isolate emission lines of copper (577 nm) and deuterium (656.1 nm). This diagnostic is based on the ORNL fiberscope system currently in use on multiple devices. The system will be used to guide fast wave antenna conditioning, plasma operation and provide insight into future antenna upgrades on DIII-D.

Original language	English
Pages (from-to)	530-532
Number of pages	3
Journal	Fusion Science and Technology
Volume	64
Issue number	3
DOIs	https://doi.org/10.13182/FST13-A19147
State	Published - Sep 2013

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title = "Initial testing of optical arc detector inside 285/300 fast wave antenna box on DIII-D",

abstract = "Locating arcs within the fast wave current drive system is necessary to improve antenna performance and coupling to the plasma. Previously, there had been no way to observe arcs inside the vacuum vessel in an ICRF antenna on DIII-D. A new diagnostic that uses photomultiplier tubes has been installed for the 2012 run campaign on the 285/300 antenna of the fast wave system. The diagnostic has top and bottom views of the back of the four antenna straps and uses narrow-bandpass visible filters to isolate emission lines of copper (577 nm) and deuterium (656.1 nm). This diagnostic is based on the ORNL fiberscope system currently in use on multiple devices. The system will be used to guide fast wave antenna conditioning, plasma operation and provide insight into future antenna upgrades on DIII-D.",

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language = "English",

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T1 - Initial testing of optical arc detector inside 285/300 fast wave antenna box on DIII-D

AU - Diem, S. J.

AU - Fehling, D. T.

AU - Hillis, D. L.

AU - Horton, A. R.

AU - Nagy, A.

AU - Pinsker, R. I.

AU - Unterberg, E. A.

PY - 2013/9

Y1 - 2013/9

N2 - Locating arcs within the fast wave current drive system is necessary to improve antenna performance and coupling to the plasma. Previously, there had been no way to observe arcs inside the vacuum vessel in an ICRF antenna on DIII-D. A new diagnostic that uses photomultiplier tubes has been installed for the 2012 run campaign on the 285/300 antenna of the fast wave system. The diagnostic has top and bottom views of the back of the four antenna straps and uses narrow-bandpass visible filters to isolate emission lines of copper (577 nm) and deuterium (656.1 nm). This diagnostic is based on the ORNL fiberscope system currently in use on multiple devices. The system will be used to guide fast wave antenna conditioning, plasma operation and provide insight into future antenna upgrades on DIII-D.

AB - Locating arcs within the fast wave current drive system is necessary to improve antenna performance and coupling to the plasma. Previously, there had been no way to observe arcs inside the vacuum vessel in an ICRF antenna on DIII-D. A new diagnostic that uses photomultiplier tubes has been installed for the 2012 run campaign on the 285/300 antenna of the fast wave system. The diagnostic has top and bottom views of the back of the four antenna straps and uses narrow-bandpass visible filters to isolate emission lines of copper (577 nm) and deuterium (656.1 nm). This diagnostic is based on the ORNL fiberscope system currently in use on multiple devices. The system will be used to guide fast wave antenna conditioning, plasma operation and provide insight into future antenna upgrades on DIII-D.

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Initial testing of optical arc detector inside 285/300 fast wave antenna box on DIII-D

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