Electron cyclotron emission imaging diagnostic for the helically symmetric experiment stellarator (abstract) : Proceedings of the 12th topical conference on high temperature plasma diagnostics
Liang, C. ; Domier, C. W. ; Luhmann, N. C.
[S.l.] : American Institute of Physics (AIP)
Published 1999
[S.l.] : American Institute of Physics (AIP)
Published 1999
| ISSN: |
1089-7623
|
|---|---|
| Source: |
AIP Digital Archive
|
| Topics: |
Physics
Electrical Engineering, Measurement and Control Technology
|
| Notes: |
An eight channel electron cyclotron emission imaging (ECEI) diagnostic system is being developed for use on the helically symmetric experiment (HSX) stellarator. The system utilizes a linear Schottky diode mixer/receiver array, coupled with low cost conventional ECE radiometer IF boards under development at U.C. Davis, to measure the second harmonic x-mode radiation from the plasma. The array is fed with a fixed local oscillator, with single sideband operation enabled via a dichroic plate high pass filter whose cutoff frequency equals that of the local oscillator. A multithrow, high speed (〈100 ns switching times) microwave switch is utilized to sequentially connect the output from each mixer channel to the broadband IF receiver system, thus making the array capable of generating a high resolution two-dimensional image of the HSX electron temperature profile at rates exceeding 50 kHz. Instrument details of the system will be described. © 1999 American Institute of Physics.
|
| Type of Medium: |
Electronic Resource
|
| URL: |