BPP experiments @ the tokamak GOLEM

Essential parameters:

  • Date:020317
  • 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:500

Experimental setup

Ball pen probe @ North-East port


setup

Discharges involved

Discharge # Vacuum # $U_{B_t}$ [V] Analysis Comment
#23447 #23448 1300 link
#23449 #23448 1300 link
#23450 #23448 1300 link
#23451 #23448 1300 link

23447

23449

23450

23451

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 4 par fit definition:$I(V_{bias},I_{sat},V_{fl},T_e,C)=-I_{sat}*(1-C*(V_{bias}-V_{fl}))*(1-\exp((V_{bias}-V_{fl})/T_e)$
Classical 3 par fit definition:$I(V_{bias},I_{sat},V_{fl},T_e)=-I_{sat}*(1-\exp((V_{bias}-V_{fl})/T_e)$

Time cross compares

Time

data

$B_t$

data

$a_1$

data

$a_2$

data

$a_3$

data

$a_4$

data

$I_{sat}$

data

$V^{BPP.LP}_{fl}$

data

$T_e$

data

$C$

data

$Ratio_{Sat}$

data

$V^{BPP}_{pl}$

data

alpha

data

$V^{BPP.LP}_{fl}$ x $\varphi^{BPP}_{pl}$

$B_t$ cross compares

Time

data

$B_t$

data

$a_1$

data

$a_2$

data

$a_3$

data

$a_4$

data

$I_{sat}$

data

$V^{BPP.LP}_{fl}$

data

$T_e$

data

$C$

data

$Ratio_{Sat}$

data

$V^{BPP}_{pl}$

data

alpha

data

$V^{BPP.LP}_{fl}$ x $\varphi^{BPP}_{pl}$

References