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DIII-D divertor reflectometer system
- Source :
- Review of Scientific Instruments. 68:447-449
- Publication Year :
- 1997
- Publisher :
- AIP Publishing, 1997.
-
Abstract
- Divertor density profiles, asymmetries, turbulence, and MARFE diagnosis are extremely important and affect the divertor design process for ITER and other future devices. In addition, a functioning divertor density profile system will be essential for the operation of these machines. It is thus critical to prototype and demonstrate diagnostics capable of operating in a divertor environment. To meet these needs a divertor reflectometer system has been designed and installed on DIII-D. The design stresses flexibility, modularity, and simplicity. It consists of a circular, smoothwall, overmoded waveguide followed by a TE11⇒HE11 mode converter (the HE11 mode is a low loss Gaussian mode with a very symmetric radiation pattern, optimal for this use) thus allowing use of an arbitrary polarization (fpe,fLH,fRH). The design provides for testing of a variety of antennas/probing directions including: upward to probe the X-point region, including MARFEs, sideways to probe outboard/inboard divertor legs, and oppositely...
Details
- ISSN :
- 10897623 and 00346748
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- Review of Scientific Instruments
- Accession number :
- edsair.doi...........4780464637eed74f9ffe88720d197242