BPP experiments @ the tokamak GOLEM

Essential parameters:

  • Date: 090217
  • BPP used for Plasma Float potential $\varphi_{fl}$, BPP_LP used in sweped mode
  • Probe position:The BPP top from the plasma centre $d=50$ mm
  • The VA characteristic resistor:20$\Omega$
  • Sweeping frequency:1000

Experimental setup

Ball pen probe @ North-East port


setup

Discharges involved

Discharge # Vacuum # $U_{B_t}$ [V] Analysis Comment
#23297 #23196 1100 link
#23295 #23194 1200 link
#23296 #23192 1300 link

23297:

23295:

23296:

Reproducibility

Iplasma:

Uloop:

Btoroidal:

Fits definition

Azooz fit definition:$I(a,V_{bias})=\exp[a_1 \tanh\{(V_{bias}+a_2)/a_3\}]+a_4$
Classical fit definition:$I(V_{bias},I_{sat},V_{fl},T_e,C)=-I_{sat}*(1-C*(V_{bias}-V_{fl}))*(1-\exp((V_{bias}-V_{fl})/T_e)$

Time cross compares

Time

data

$B_t$

data

$a_1$

data

$a_2$

data

$a_3$

data

$a_4$

data

$I_{sat}$

data

$V_{pl}$

data

$T_e$

data

$C$

data

$Ratio_{Sat}$

data

$U_{fl}$

data

alpha

data

$\varphi_{fl}$ x $\varphi_{pl}$

$B_t$ cross compares

Time

data

$B_t$

data

$a_1$

data

$a_2$

data

$a_3$

data

$a_4$

data

$I_{sat}$

data

$V_{pl}$

data

$T_e$

data

$C$

data

$Ratio_{Sat}$

data

$U_{fl}$

data

alpha

data

$\varphi_{fl}$ x $\varphi_{pl}$

References