DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN Review | Direct submission with log-in | Request submission without log-in
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Title	381: Search for turbulence at ion-cyclotron frequencies
Name:	Edward Doyle doyle@fusion.gat.com	Affiliation:	University of California, Los Angeles
Research Area:	Turbulence & Transport	Presentation time:	Not requested
Co-Author(s):	R. Waltz, T. Rhodes	ITPA Joint Experiment :	No
Description:	GYRO simulates "low" frequency turbulence from ITG/TEM/ETG modes. However, GYRO does not include electrostatic turbulence at ion-cyclotron frequencies. Interaction between ion cyclotron and low frequency drift turbulence is a potential important physics mechanism which could lead to GYRO underestimating turbulence and and transport in L-mode plasmas.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	Operate stationary L- and H-mode plasma phases without RF heating. Characterize presence and level of turbulence at ion cyclotron frequency range - measurements in L-mode are key.
Background:	See Waltz and Dominguez, Phys. Fluids 24 1575 (1981) for theory of ion-cyclotron modes.
Resource Requirements:
Diagnostic Requirements:	Extend frequency range of DBS system to cover iion cyclotron frequencies (10s of MHz).
Analysis Requirements:	Estimation of whether observed turbulence levels are significant for GYRO.
Other Requirements: