Page 14 - Two-chord Interferometry using 3.39 µm He-Ne Laser on a Flux-Coil-Generated FRC
P. 14
K=0.7
⎡ ⎛ r2 ⎞⎤ n(r)=n sech2 K⎜ −1⎟
n = n(R), R = r /20.5: null point, max s
K=1.3
K=2.0
Inner tube
Averaged density
rs ~27cm
LCh1 ~48cm
Chord 1 (r~12cm)
r
Privileged and Confidential
LCh2 ~36cm
s
14
HTPD2010, Wildwood, NJ, 5/17/2010
Presenter: Hiroshi Gota
Chord 2 (r~20cm)
Rigid-Rotor Profile Model (for density)
max ⎢ ⎜ R2 ⎟⎥ ⎣⎝ ⎠⎦
K = tanh–1[B(rs)/B0] ~ tanh–1(1−βs)0.5 Density profile
W/O flux-coil
Line density
