A method of tuning resonant loops

F. W. Baity; R. H. Goulding; R. I. Pinsker

doi:10.1063/1.2800474

A method of tuning resonant loops

F. W. Baity, R. H. Goulding, R. I. Pinsker

Fusion Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A convenient method of tuning resonant loops has been developed for use on the Long-Pulse Fast Wave Current Drive antennas on DIII-D. These 4-element antennas are fed from a single RF source, with a 90° hybrid junction feeding two resonant loops. Each resonant loop connects a pair of non-adjacent current straps, and a decoupler allows independent impedance matching of each output leg of the hybrid junction. The tuning method involves only measurement of the reflection coefficient of each resonant loop and the transmission from one loop to the other. It will be shown that this method of tuning equalizes the currents in all four current straps and 90° phasing between adjacent elements.

Original language	English
Title of host publication	RADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication	17th Topical Conference on Radio Frequency Power in Plasmas
Pages	191-194
Number of pages	4
DOIs	https://doi.org/10.1063/1.2800474
State	Published - 2007
Event	17th Topical Conference on Radio Frequency Power in Plasmas - Clearwater, FL, United States Duration: May 7 2007 → May 9 2007

Publication series

Name	AIP Conference Proceedings
Volume	933
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	17th Topical Conference on Radio Frequency Power in Plasmas
Country/Territory	United States
City	Clearwater, FL
Period	05/7/07 → 05/9/07

Keywords

DIII-D
Radiofrequency heating

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/1.2800474

Cite this

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title = "A method of tuning resonant loops",

abstract = "A convenient method of tuning resonant loops has been developed for use on the Long-Pulse Fast Wave Current Drive antennas on DIII-D. These 4-element antennas are fed from a single RF source, with a 90° hybrid junction feeding two resonant loops. Each resonant loop connects a pair of non-adjacent current straps, and a decoupler allows independent impedance matching of each output leg of the hybrid junction. The tuning method involves only measurement of the reflection coefficient of each resonant loop and the transmission from one loop to the other. It will be shown that this method of tuning equalizes the currents in all four current straps and 90° phasing between adjacent elements.",

keywords = "DIII-D, Radiofrequency heating",

author = "Baity, {F. W.} and Goulding, {R. H.} and Pinsker, {R. I.}",

year = "2007",

doi = "10.1063/1.2800474",

language = "English",

isbn = "0735404445",

series = "AIP Conference Proceedings",

pages = "191--194",

booktitle = "RADIO FREQUENCY POWER IN PLASMAS",

note = "17th Topical Conference on Radio Frequency Power in Plasmas ; Conference date: 07-05-2007 Through 09-05-2007",

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AU - Baity, F. W.

AU - Goulding, R. H.

AU - Pinsker, R. I.

PY - 2007

Y1 - 2007

N2 - A convenient method of tuning resonant loops has been developed for use on the Long-Pulse Fast Wave Current Drive antennas on DIII-D. These 4-element antennas are fed from a single RF source, with a 90° hybrid junction feeding two resonant loops. Each resonant loop connects a pair of non-adjacent current straps, and a decoupler allows independent impedance matching of each output leg of the hybrid junction. The tuning method involves only measurement of the reflection coefficient of each resonant loop and the transmission from one loop to the other. It will be shown that this method of tuning equalizes the currents in all four current straps and 90° phasing between adjacent elements.

AB - A convenient method of tuning resonant loops has been developed for use on the Long-Pulse Fast Wave Current Drive antennas on DIII-D. These 4-element antennas are fed from a single RF source, with a 90° hybrid junction feeding two resonant loops. Each resonant loop connects a pair of non-adjacent current straps, and a decoupler allows independent impedance matching of each output leg of the hybrid junction. The tuning method involves only measurement of the reflection coefficient of each resonant loop and the transmission from one loop to the other. It will be shown that this method of tuning equalizes the currents in all four current straps and 90° phasing between adjacent elements.

KW - DIII-D

KW - Radiofrequency heating

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U2 - 10.1063/1.2800474

DO - 10.1063/1.2800474

M3 - Conference contribution

AN - SCOPUS:36849054975

SN - 0735404445

SN - 9780735404441

T3 - AIP Conference Proceedings

SP - 191

EP - 194

BT - RADIO FREQUENCY POWER IN PLASMAS

T2 - 17th Topical Conference on Radio Frequency Power in Plasmas

Y2 - 7 May 2007 through 9 May 2007

ER -

A method of tuning resonant loops

Abstract

Publication series

Conference

Keywords

UN SDGs

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