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Edge density characterization in the RFX-mod experiment using the ultrafast reflectometry technique
- Source :
- Nuclear fusion 51 (2011). doi:10.1088/0029-5515/51/5/053016, info:cnr-pdr/source/autori:G. De Masi; R. Cavazzana; A. Fassina; E. Martines; B. Momo; M. Moresco/titolo:Edge density characterization in the RFX-mod experiment using the ultrafast reflectometry technique/doi:10.1088%2F0029-5515%2F51%2F5%2F053016/rivista:Nuclear fusion/anno:2011/pagina_da:/pagina_a:/intervallo_pagine:/volume:51
- Publication Year :
- 2011
- Publisher :
- International Atomic Energy Agency., Wien, 2011.
-
Abstract
- The traditional and widely used reflectometric schemes are not able to probe the edge density layers of the reversed field pinches (RFPs) due to the presence of a high level of density fluctuations. In order to overcome this limitation, an ultrafast microwave reflectometer has been developed and the first Ka-band has been successfully operational on the RFX-mod experiment [1] since mid-2009. The actual diagnostics configuration (frequency sweep 26.5–30.5 GHz in 1 µs) allows us to evaluate the radial distance of the relative cut-off density layer with a high time resolution. The first results are presented and discussed in this paper. In particular, a relation between edge density and local magnetic topology is proposed as well as a systematic study of the average behaviour over several global operative conditions of the machine. An outlook on the future diagnostic developments is also given.
- Subjects :
- Physics
Nuclear and High Energy Physics
reflectometry
RFX-mod
Field (physics)
Edge density
business.industry
MICROWAVE REFLECTOMETRY
BAND FREQUENCY-MODULATION
Topology (electrical circuits)
reversed field pinch
Condensed Matter Physics
Sweep frequency response analysis
Characterization (materials science)
Optics
Nuclear magnetic resonance
PROFILE MEASUREMENTS
edge density
REVERSED-FIELD PINCH
TOKAMAK
RFP
Reflectometry
business
Ultrashort pulse
Microwave
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nuclear fusion 51 (2011). doi:10.1088/0029-5515/51/5/053016, info:cnr-pdr/source/autori:G. De Masi; R. Cavazzana; A. Fassina; E. Martines; B. Momo; M. Moresco/titolo:Edge density characterization in the RFX-mod experiment using the ultrafast reflectometry technique/doi:10.1088%2F0029-5515%2F51%2F5%2F053016/rivista:Nuclear fusion/anno:2011/pagina_da:/pagina_a:/intervallo_pagine:/volume:51
- Accession number :
- edsair.doi.dedup.....2d257062a08715515acc0fba7e4e41d9