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UCLA & MAST collaborating to implement Doppler Backscattering on MAST for M9 campaign

UCLA & MAST collaborating to implement Doppler Backscattering on MAST for M9 campaign. cutoff. incident radiation. d n. k i + k d n = k s. s cattered radiation. d E. d df / dt. TAEs. 42.5 GHz backscattered microwave spectra: E = A exp ( i f ).

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UCLA & MAST collaborating to implement Doppler Backscattering on MAST for M9 campaign

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  1. UCLA & MAST collaborating to implement Doppler Backscattering on MAST for M9 campaign cutoff incident radiation dn ki+kdn=ks scattered radiation dE ddf/dt TAEs 42.5 GHz backscattered microwave spectra: E = Aexp(if) • DBS measures plasma flow (yielding Er) and intermediate-k turbulence near cutoff • Working with Dr. Jon Hillesheim at MAST • Q-band and V-band systems shipped to MAST in April 2013 • 16 channels, 30 – 75 GHz;cutoffs @1 – 7 x 1013 cm-3 in O-mode • can be configured for DBS or reflectometry • Systems bench tested & installed June 2013 • Initial DBS data looks promising • TAEs observed via DBS (bottom) & Reflectometry

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