ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
In an effort to determine the effects of impurities on turbulence in the edge plasma of tokamaks (electron temperature and radiative cooling rate out of phase), we would like to cross-correlate local measurements of T˜e and p˜rad. The former is provided by Langmuir probes.c) Unfortunately, only chord-integrated radiated power is available, provided by a high-resolution scannable X-UV array.d) We orient one channel of the array to intersect the flux tube sampled by the probe (taking advantage of the long parallel correlation lengths) and cross-correlate the signals in an attempt to extract the portion of the radiation signal eminating from the probe location. Preliminary results indicate a statistically significant level of correlation. A model for cross correlating a chord-integrated signal with a local signal is studied to aid the interpretation of the experimental results. If successful, this technique has important ramifications generally in that it effectively converts a chord-averaged measurement into a local one. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1146381
