Tokamak GOLEM - Shot Database - #50737

Time stamp25-12-03 09:40:37The session missionTrainingCourses/PlasmaSchools/EMTRAIC.cz/HeTransportBar-2025Spontaneous transport barrier in the He plasmaThe session ID 50737 The discharge commentFast spectrometer R_bias test - 1 MOhm, reference shot inspired #50708Discharge command/Dirigent.sh --discharge --operation.discharge "style='standard'" --infrastructure.bt_ecd "U_Bt=900,t_Bt=0,O_Bt='CW',U_cd=700,t_cd=0,O_cd='CW'" --infrastructure.preionization "S_de ...

     Technological parameters

• Working Gas: \(p\sub{chamber}\sup{discharge,before}\)=0.21 mPa; \(p\sub{chamber}\sup{discharge,pre}\)=15.10 mPa (\(p\sub{WG}\sup{request}\)= 15 mPa@\(X\sub{WG}\sup{request}\)=He )
• Toroidal magnetic field: \(U\sub{B\sub{t}}\sup{request}\)=900 V@\(t\sub{B\sub{t}}\sup{request}\)=0.0 us
• Current drive field: \(U\sub{E\sub{cd}}\sup{request}\)=700 V@\(t\sub{cd}\sup{request}\)=0.0 us

    Plasma:

• Plasma: yes or no: ☑
• Time parameters:\(\Delta t\sub{p}\)=11.65 ms (from:\(t\sub{start}\)=0.67 ms,to:\(t\sub{end}\)=12.32 ms)

    Plasma parameters:

• Loop voltage:\(\overline{U\sub{loop}}\)\(\)=13.65 ; \(\)=16.72 ; \(\)=0.00
• Toroidal magnetic field: \(\overline{B\sub{t}}\)=0.22 T; \(\max_{\tau \in [discharge]}B\sub{t}\)=0.38 T
• Plasma current: \(\overline{I\sub{p}}\)=2.71 kA; \(\max_{\tau \in [discharge]}I\sub{p}\)=4.00 kA; \(t\sub{Ip}\sup{max}\)=0.00 ms

Basic Diagnostics    

On stage diagnostics

Basic diagnostics Data flow:  Documentation:

Double langmuir ball pen probe Data flow:  Documentation:

Parameters:r_lp_tip='95',S_mode_lp='float',R_lp_div_osc='10e3',R_lp_div_nosc='1e6',R_bpp_div_osc='10e3',R_bpp_d

Fast cameras Data flow:  Documentation:

Parameters:fr_ux100a=1200,height_ux100a=56,recrate_ux100a=40000,shotdur_ux100a=40,width_ux100a=1280,fr_ux100b=1

Slow optical spectrometry Data flow:  Documentation:

Fast spectrometry Data flow:  Documentation:

Off stage diagnostics

Interferometry Data flow:  Documentation:

Scintillation probes Data flow:  Documentation:

Parameters:U_NIM_A1=600,U_NIM_A2=600,U_NIM_A3=600,U_NIM_A4=600

Magnetohydrodynamic 16 mirnov coils ring Data flow:  Documentation:

Analysis

Name	Analysis results

Infrastructure

Chamber

Bt and Ecd ,

Parameters :U_Bt=900,t_Bt=0,O_Bt='CW',U_cd=700,t_cd=0,O_cd='CW'

Working gas

Parameters :S_mode='p_wg',S_gas='He',p_H=15,U_v=0

Preionization

Parameters :S_device='HotCathode',SW_main='on',U_heater=100,U_accel=100

Position stabilization :

Parameters :main_switch='on',radial_switch='on',radial_waveform='1000,0;4500,0;5000,3;5500,7;6000,10;8000,15;9000,15;20000,15;25000,0',vertical_switch='on',vertical_waveform='1000,0;4000,0;4500,-3;5000,-7;5500,-10;10000,-12;25000,0'

Current stabilization

Parameters :main_switch='off',waveform='1000,0;5000,0;12000,15;16000,15;20000,0'

Acknowledgement

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Thanks to the specific help

The tokamak GOLEM controll SW @