Q-band AM Reflectometer on the DIII-D 285^o-300^o Fast Wave Antenna
Abstract
A Q-band AM reflectometer has been re-installed onto the 285^o-300^o fast wave antenna on DIII-D to measure the local density profile in the scrape-off layer (SOL) at the ICRF antenna. This reflectometer sweeps from 32-54 GHz in 100 microseconds and uses 100 MHz amplitude modulation to allow differential-phase measurements. Initial results during RF operation will be presented, including results during gas puffing at the fast wave antenna to increase antenna loading.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 2009
- Bibcode:
- 2009APS..DPPJP8117H