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Title: RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTATLLATION ON THE DIII-D TOKAMAK

Abstract

OAK A271 RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTALLATION ON THE DIII-D TOKAMAK. Significant improvements are being implement4ed to the capability of the 110 GHz electron cyclotron system on the DIII-D tokamak. Chief among these is the addition of the fifth and sixth 1 MW class gyrotrons, increasing the power available for auxiliary heating and current drive by nearly 60%. These tubes use artificially grown diamond rf output windows to obtain high power with long pulse capability. The beams from these tubes are nearly Gaussian, facilitating coupling to the waveguide. A new fully articulating dual launcher capable of high speed spatial scanning has been designed and tested. The launcher has two axis independent steering for each waveguide. the mirrors can be rotated at up to 100{sup o}/s. A new feedback system linking the DIII-D Plasma Control System (PCS) with the gyrotron beam voltage waveform generators permits real-time feedback control of some plasma properties such as electron temperature. The PCS can use a variety of plasma monitors to generate its control signal, including electron cyclotron emission and Mirnov probes. Electron cyclotron heating and electron cyclotron current drive (ECH and ECCD) were used during this year's DIII-D experimental campaign tomore » control electron temperature, density, and q profiles, induce an ELM-free H-mode, and suppress the m=2/n=1 neoclassical tearing mode. The new capabilities have expanded the role of EC systems in tokamak plasma control.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
GENERAL ATOMICS (US)
Sponsoring Org.:
(US)
OSTI Identifier:
813652
DOE Contract Number:  
AC03-99ER54463
Resource Type:
Conference
Resource Relation:
Conference: THIS IS A PREPRINT OF A PAPER PRESENTED AT THE 22ND SYMPOSIUM ON FUSION TECHNOLOGY, HELSINKI (FI), 09/09/2002--09/13/2002; Other Information: THIS PREPRINT WILL BE PUBLISHED IN FUSION ENGINEERING AND DESIGN; PBD: 1 Oct 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; AUXILIARY HEATING; CONTROL SYSTEMS; CYCLOTRONS; DOUBLET-3 DEVICE; ELECTRON TEMPERATURE; ELECTRONS; FEEDBACK; HEATING; MICROWAVE AMPLIFIERS; MIRRORS; MONITORS; PROBES; VELOCITY; WAVE FORMS

Citation Formats

PONCE, D, CALLIS, RW, CARY, WP, FERRON, JR, GREEN, M, GRUNLOH, HJ, GORELOV, Y, LOHR, J, and ELLIS, RA. RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTATLLATION ON THE DIII-D TOKAMAK. United States: N. p., 2002. Web.
PONCE, D, CALLIS, RW, CARY, WP, FERRON, JR, GREEN, M, GRUNLOH, HJ, GORELOV, Y, LOHR, J, & ELLIS, RA. RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTATLLATION ON THE DIII-D TOKAMAK. United States.
PONCE, D, CALLIS, RW, CARY, WP, FERRON, JR, GREEN, M, GRUNLOH, HJ, GORELOV, Y, LOHR, J, and ELLIS, RA. Tue . "RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTATLLATION ON THE DIII-D TOKAMAK". United States. https://www.osti.gov/servlets/purl/813652.
@article{osti_813652,
title = {RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTATLLATION ON THE DIII-D TOKAMAK},
author = {PONCE, D and CALLIS, RW and CARY, WP and FERRON, JR and GREEN, M and GRUNLOH, HJ and GORELOV, Y and LOHR, J and ELLIS, RA},
abstractNote = {OAK A271 RECENT DEVELOPMENTS ON THE 110 GHZ ELECTRON CYCLOTRON INSTALLATION ON THE DIII-D TOKAMAK. Significant improvements are being implement4ed to the capability of the 110 GHz electron cyclotron system on the DIII-D tokamak. Chief among these is the addition of the fifth and sixth 1 MW class gyrotrons, increasing the power available for auxiliary heating and current drive by nearly 60%. These tubes use artificially grown diamond rf output windows to obtain high power with long pulse capability. The beams from these tubes are nearly Gaussian, facilitating coupling to the waveguide. A new fully articulating dual launcher capable of high speed spatial scanning has been designed and tested. The launcher has two axis independent steering for each waveguide. the mirrors can be rotated at up to 100{sup o}/s. A new feedback system linking the DIII-D Plasma Control System (PCS) with the gyrotron beam voltage waveform generators permits real-time feedback control of some plasma properties such as electron temperature. The PCS can use a variety of plasma monitors to generate its control signal, including electron cyclotron emission and Mirnov probes. Electron cyclotron heating and electron cyclotron current drive (ECH and ECCD) were used during this year's DIII-D experimental campaign to control electron temperature, density, and q profiles, induce an ELM-free H-mode, and suppress the m=2/n=1 neoclassical tearing mode. The new capabilities have expanded the role of EC systems in tokamak plasma control.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {10}
}

Conference:
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