ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Electron cyclotron resonance heating (ECRH) has made rapid progress over the last few years due primarily to improved gyrotron source technology. The unique ability of ECRH to deposit energy locally offers numerous advantages, such as the ability to preionize, initiate, control, and heat fusion plasmas. However, wave propagation and absorption mechanisms are not well understood and the fusion community would clearly benefit from a nonperturbing monitor of ECRF wave activity. The use of FIR collective Thomson scattering techniques on the upcoming ECRH experiment on TEXT is described. The intention is to probe both k⊥ and k(parallel) ECRF wave activity as well as simultaneously monitoring microturbulence levels. The existing source frequency of 245 GHz will experience a large frequency shift (∼60 GHz) after scattering from ECRF waves. This has a number of important consequences for the accurate interpretation of scattering data. These will be described in detail as well as alternative CO2 and FIR laser scattering schemes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1138812
