Page 14 - MHD Mode Identification by Higher Order Singular Value Decomposition in C-2W

Doppler Backscattering / Cross Polarization Scattering System Developed to Probe EM Fluctuations in FRC Core
Probing radius (cut-off layer)
kI
􏰀,k kS
k􏰁
O-Mode CPS receive 􏰀s=􏰀i-k􏰁vExB
II
􏰂
Polarizer
f
X-Mode
made at cut-off layer
Two-axis (z, f) mirror adjustment
Off-midplane launch: mismatch corrected with axial mirror tilt f
DBS Launch/ Receive
ks=ki-k􏰁 Measurements of both 𝐸! and 𝐵!
Reduced Density Fluctuations
at Higher Electrode Bias Consistent with Increased ExB Shear
See L. Schmitz’s poster for more details
Presenter: Thomas Roche – HTPD2020 Conference
L. Schmitz et al., RSI 89, 10H116 (2018);
C.K. Lau et al., Nucl. Fusion 59, 066018 (2019)
14