Measurement of BAAE and RSAE Mode Structures
with high-k Scattering System
Woochang Lee
High-k Scattering System
• 280 GHz (=1 mm) scattering system
• 5 detection channels (5 discrete k┴)
• Can cover arbitrary radial position from ~105 cm to ~145 cm
• The scattering volume is spatially localized (w = 3 cm, Lz = ~ 5 cm)
• Sensitive to the radial fluctuation
• Will be absolutely calibrated soon
BAAE in NSTX
N. Gorelenkov 07XP
r/a = 0.7 (R ~ 132 cm)
Bt = 4.5 kG
P_NBI = 2 MW
BAAE (n=2)
RSAE in NSTX
H. Yuh 07XP
R = 120 cm
Bt = 5.5 kG
P_NBI = 2 MW
Mode structure of RSAE(R=120cm) (R=110cm)
Radial Structure of BAAE by USXR
APS07 poster of
N. Gorelenkov
Radial Structure of BAAE by Reflectometer
APS07 poster of
N. Gorelenkov
Experiment Plan
• Obtain high-k scattering data at 8~9 R-positions from ~115 cm to ~145 cm for several plasma conditions.
Need 7 control access to change launching mirror angle
BAAE of 123816
high-k channel
low-k channel
RSAE of 123816
high-k channel
low-k channel