Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.019 seconds
Taylor, G.; Diem, S.J.; Ellis, R.A.; Fredd, E.; Greenough, N.; Hosea, J.C.; Wilgen, J.B.; Harvey, R.W.; Smirnov, A.P.; Preinhaelter, J.; Urban, J.; Ram, A.K.
Princeton Plasma Physics Lab., Princeton, NJ (United States). Funding organisation: USDOE Office of Science (United States)2008
Princeton Plasma Physics Lab., Princeton, NJ (United States). Funding organisation: USDOE Office of Science (United States)2008
AbstractAbstract
[en] A 28 GHz electron cyclotron heating (ECH) and electron Bernstein wave heating (EBWH) system has been proposed for installation on the National Spherical Torus Experiment (NSTX). A 350 kW gyrotron connected to a fixed horn antenna is proposed for ECH-assisted solenoid-free plasma startup. Modeling predicts strong first pass on-axis EC absorption, even for low electron temperature, Te ∼ 20 eV, Coaxial Helicity Injection (CHI) startup plasmas. ECH will heat the CHI plasma to Te ∼ 300 eV, providing a suitable target plasma for 30 MHz high-harmonic fast wave heating. A second gyrotron and steered O-X-B mirror launcher is proposed for EBWH experiments. Radiometric measurements of thermal EBW emission detected via B-X-O coupling on NSTX support implementation of the proposed system. 80% B-X-O coupling efficiency was measured in L-mode plasmas and 60% B-X-O coupling efficiency was recently measured in H-mode plasmas conditioned with evaporated lithium. Modeling predicts local on-axis EBW heating and current drive using 28 GHz power in β ∼ 20% NSTX plasmas should be possible, with current drive efficiencies ∼ 40 kA/MW.
Primary Subject
Source
20 Mar 2008; 10 p; 15. Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating; Yosemite, CA (United States); 10-13 Mar 2008; ACO2-76CHO3073; Also available from OSTI as DE00959395; PURL: https://www.osti.gov/servlets/purl/959395-208afc/
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue