The GOLEM experimental setup
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1 The GOLEM documentation collection The GOLEM experimental setup Vojtěch Svoboda & the GOLEM team September 26, 2012
2 Outline of the talk 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
3 Content 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
4 Tokamak GOLEM - basic parameters: major radius R = 0.4 plasma current I pl < 10 ka toroidal magnetic field B tor < 1 T electron temperature T e (0) < 200 ev minor radius a = m pulse length t < 20 ms plasma density n e = /m 3 ion temperature T i (0) < 100 ev
5 Plasma in Tokamak (GOLEM) - the least to do Evacuate the chamber. Fill in the working gas. Toroidal magnetic field to confine plasma. Toroidal electric field to breakdown neutral gas into plasma. Toroidal electric field to heat the plasma. Plasma positioning. Diagnostics.
6 Unique remote operation capability
7 Content 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
8 Engineering scheme of the GOLEM tokamak
9 The GOLEM chamber The plasma cross section is circular. The vacuum vessel is made of stainless steel. It is /on request/ baked with a series of cycles at 200 o C before an experiment.
10 Golem transformer Iron transformer core.
11 Preionization, Vacuum and Gas management
12 Toroidal magnetic field B tor circuit
13 Toroidal electric field E tor circuit
14 Vertical magnetic (stabilization) field B ST circuit
15 Trigger sequence
16 Basic plasma diagnostics on tokamak GOLEM
17 Content 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
18 The plasma generation
19 Golem discharge
20 Engineering scheme of the GOLEM tokamak
21 Content 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
22 The GOLEM tokamak real Control Room
23 The result webpage
24 Operational parameters and their limits The parameters to be set remotely: Toroidal magnetic field (B t ) through the voltage of the toroidal field capacitor bank U B, range: V. Toroidal electric field (E CD ) through the capacitor bank for the current drive U CD, range: V. Toroidal electric field (E BD ) through the capacitor bank for the breakdown U BD, range: V. The time delay between the triggers of the toroidal magnetic field and the current drive T CD, range: µs. The time delay between the triggers of the toroidal magnetic field and the breakdown T BD, range: µs. Hydrogen or Helium gas pressure p WG, range: mpa. Status of preionization (ON/OFF). Requested working gas (H2/He).
25 Data access All the recorded data and the settings for each shot are available at the GOLEM website. The root directory for the files is: Basic data of the shot series are collected at a page to be reached at: Actual discharge has the web page: Actual session has the web page:
26 Content 1 Introduction 2 Experimental setup 3 Golem discharge 4 (Remote) operation of the GOLEM tokamak 5 Conclusion
27 Acknowledgement The financial support by FUSENET, MSM , MSM and A1581 is acknowledged. GOLEM team (students, teachers, technicians) Edita Bromova, Zdenek Cespiro, Ivan Duran, Vladimir Fuchs, Ondrej Grover, Pavel Hacek, Billy Huang, Igor Jex, Michal Kazda, Jindrich Kocman, Martin Kubic, Ondrej Kudlacek, Petr Liska, Tomas Markovic, Jan Mlynar, Michal Odstrcil, Tomas Odstrcil, Ondrej Pluhar, Gergo Pokol, Ondrej Sebek, Adam Sindlery, Michal Smid, Jan Stöckel, Gabriel Vondrasek, Ondrej Vrba, Frantisek Zacek, and Jiri Zara. Special thanks:
28 Final Thank you for your attention you are welcome.
29 References I G. Van Oost, M. Berta, J. Brotankova, R. Dejarnac, E. Del Bosco, E. Dufkova, I. Duran, M. P. Gryaznevich, J. Horacek, M. Hron, A. Malaquias, G. Mank, P. Peleman, J. Sentkerestiova, J. Stoeckel, V. Weinzett, S. Zoletnik, B. Tal, J. Ferrera, A. Fonseca, H. Hegazy, Y. Kuznetsov, A. Ossyannikov, A. Singh, M. Sokholov, and A. Talebitaher. Joint experiments on small tokamaks: edge plasma studies on CASTOR. NUCLEAR FUSION, 47(5): , MAY 2007.
30 References II V. Svoboda, J. Mlynář, G. Pokol, D. Réfy, J. Stöckel, and G. Vondrášek. Former Tokamak CASTOR becomes remotely controllable GOLEM at the Czech Technical University in Prague. In Europhysics Conference Abstracts. 37th EPS Conference on Plasma Physics (online: volume 34A, Brotankova, J. Study of high temperature plasma in tokamak-like experimental devices. PhD. thesis 2009.
31 References III Tokamak GOLEM at the Czech Technical University in Prague V. Svoboda, B. Huang, J. Mlynar, G.I. Pokol, J. Stockel, and G Vondrasek. Multi-mode Remote Participation on the GOLEM Tokamak. Fusion Engineering and Design, 86(6-8): , 2011.
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