HT-7JT-60U

JET e-ITBHJT-60U

JT-60UK

critical value()ITG -RTi/Ti ,-Rne/ne, I =Te/TiTEM: -RTe/Te,, -Rne/ne, ft: -RTe/Te, I =Te/Ti . tr tr=(1+)e ,G e= Te3/2[0+G(Te/Te- (Te/Te)c)]

s0.1cm k=2/

HT-7 Tokamak CO2 laser scattering systemMeasure range k=12~34cm-1three channel k-vector watchthe interval of between the channel is~6cm-1;k~3.1cm-1;( the scattering signal measured come from the plasma confinement region)the angle adjust step of main beam is k=3cm-1CO2LaserMain beam adjustThree channel photoelectricity receive systemplasma

ch3Hks~0.25-0.4Comparison studies density fluctuation about MARFE in HT-7 and JT-60U tokamakJT-60UMARFE

HT-7MARFEMARFE0.394 at IP0.145MA, ne0.251020m-3 and Bt=1.9T. K=14cm-1Dks~1.4K=20cm-1ECE. ks~2.0

Fig.3. the core density fluctuation level measured by CO2 laser collective scattering diagnostics during MARFE

D

Fig.2. show the low Z impurities radiating C(III) (vis7), C(V)(UV1), B(VI)(UV2)

Comparison studies density fluctuation for particle transport in HT-7 and JT-60U tokamak JT-60U()

Dk=14cm-1 k=20cm-1,HT-7()

The Characteristic frequency of density fluctuation at L mode plasma in HT-7 and JT-60U tokamakJT-60U (.L)f=200kHz

HT-7(L),~200kHz,k(ETG)

Fig.9. IP=165kA, ne=1.551019M-3 Bt=1.80Tt=500~600ms

m m 2

00 0 0/

=kl (k=2/ )

CO2&HeNe(0.628m) CO2&HeNe(3.39m) CO2&CO(5m)

(m-2) 2.21018 3.11018 41018

S/N(1020m-2) 44.6 32.3 25

EASTCO2

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