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Measure Electromagnetic Turbulence via Cross-Polarization Scattering (CPS):
~
§ CPS principle: Bq scatters launched X-mode
radiation into opposite polarization (O-mode) ~
§ Back-scattered O-mode amplitude is ~ Bq; can be separated/detected via polarizers
kI
ω,k kS kθ
II
ζ
Polarizer
§ Assess importance of magnetic fluctuations for transport in the FRC core and SOL (wide wavenumber range; 1 ≤ kperp rs ≤ 50)
§ Validate electrostatic/electromagnetic turbulence simulations
HTPD Conference 2020 Presenter: Lothar Schmitz
X-Mode
DBS Launch/ Receive
O-Mode CPS receive
ωs=ωi-kθvExB ks=ki-kθ
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