First operation and validation of simulations for the divertor cryo-vacuum pump in Wendelstein 7-X

被引：0

作者：

Haak, V. ^{[1
]}

Dhard, C. P. ^{[1
]}

Boeyaert, D. ^{[2
]}

Braeuer, T. ^{[1
]}

Bykov, V. ^{[1
]}

Day, C. ^{[3
]}

Degenkolbe, S. ^{[1
]}

Ehrke, G. ^{[1
]}

Igitkhanov, J. ^{[3
]}

Khokhlov, M. ^{[1
]}

Kremeyer, T. ^{[1
]}

Nagel, M. ^{[1
]}

Naujoks, D. ^{[1
]}

Pietsch, M. ^{[1
]}

Pilopp, D. ^{[1
]}

Schlisio, G. ^{[1
]}

Strobel, H. ^{[3
]}

Tantos, C. ^{[3
]}

Varoutis, S. ^{[3
]}

Viebke, H. ^{[1
]}

Volzke, O. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany

[2] Univ Wisconsin Madison, Madison, WI USA

[3] Karlsruhe Inst Technol, D-76344 Eggenstein Leopoldshafen, Germany

来源：

FUSION ENGINEERING AND DESIGN | 2024年 / 208卷

关键词：

Cryo-vacuum pumping; Particle exhaust; Divertor neutral gas pressure; Stellarator Wendelstein 7-X; DESIGN;

D O I：

10.1016/j.fusengdes.2024.114671

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Ten cryo-vacuum pumps (CVPs) were installed in the subdivertor region of each island divertor in the stellarator Wendelstein 7-X (W7-X) and operated for the first time during the recently completed plasma campaign OP2.1. A pumping speed of 70 +/- 1 m(3)/s was measured during dedicated tests with known hydrogen gas injection. Based on a conductance model, the estimated pumping speed ranges from 86-93 m(3)/s for different sticking coefficients between 0.6 and 0.8. After completion of the initial tests the CVPs were operated successfully throughout the campaign, with regeneration performed once a week. Neutral gas pressures in the subdivertor in the range of 10(-4) mbar are well within the molecular flow regime and limit the particle exhaust capabilities of the CVPs. Simulations of the neutral gas pressure in the three-dimensional complex geometry of the subdivertor were performed using the DIVGAS code based on the direct simulation Monte Carlo method and a model implemented in the steady-state thermal package in ANSYS, which are in agreement with the measured values during plasma operation.

引用

页数：7

共 50 条

[31] Manufacture of the vacuum vessels and the ports of Wendelstein 7-X
Reich, J
Gardebrecht, W
Hein, B
Missal, B
Tretter, J
Wanner, A
Leher, F
Langone, S
FUSION ENGINEERING AND DESIGN, 2005, 75-79 : 565 - 569
[32] Refrigerator operation during commissioning and first plasma operations of Wendelstein 7-X
Dhard, Chandra Prakash
Nagel, Michael
Bau, Holger
Raatz, Sylvio
Meyer, Uwe
Rummel, Thomas
FUSION ENGINEERING AND DESIGN, 2017, 123 : 111 - 114
[33] Wendelstein 7-X Magnets: Experiences Gained During the First Years of Operation
Rummel, Thomas
Risse, Konrad
Nagel, Michael
Moenich, Thomas
Schneider, Matthias
Fuelenbach, Frank
Bosch, Hans-Stephan
FUSION SCIENCE AND TECHNOLOGY, 2019, 75 (08) : 786 - 793
[34] Cryogenic commissioning, cool down and first magnet operation of Wendelstein 7-X
Nagel, M.
Dhard, C. P.
Bau, H.
Bosch, H. -S.
Meyer, U.
Raatz, S.
Risse, K.
Rummel, T.
26TH INTERNATIONAL CRYOGENIC ENGINEERING CONFERENCE & INTERNATIONAL CRYOGENIC MATERIALS CONFERENCE 2016, 2017, 171
[35] Status of the diagnostics development for the first operation phase of the stellarator Wendelstein 7-X
Koenig, R.
Biel, W.
Biedermann, C.
Burhenn, R.
Cseh, G.
Czarnecka, A.
Endler, M.
Estrada, T.
Grulke, O.
Hathiramani, D.
Hirsch, M.
Jablonski, S.
Jakubowski, M.
Kaczmarczyk, J.
Kasparek, W.
Kocsis, G.
Kornejew, P.
Kraemer-Flecken, A.
Krychowiak, M.
Kubkowska, M.
Langenberg, A.
Laux, M.
Liang, Y.
Lorenz, A.
Neubauer, O.
Otte, M.
Pablant, N.
Pasch, E.
Pedersen, T. S.
Schmitz, O.
Schneider, W.
Schuhmacher, H.
Schweer, B.
Thomsen, H.
Szepesi, T.
Wiegel, B.
Windisch, T.
Wolf, S.
Zhang, D.
Zoletnik, S.
REVIEW OF SCIENTIFIC INSTRUMENTS, 2014, 85 (11):
[36] First Observation of a Stable Highly Dissipative Divertor Plasma Regime on the Wendelstein 7-X Stellarator
Zhang, D.
Koenig, R.
Feng, Y.
Burhenn, R.
Brezinsek, S.
Jakubowski, M.
Buttenschoen, B.
Niemann, H.
Pavone, A.
Krychowiak, M.
Kwak, S.
Svensson, J.
Gao, Y.
Pedersen, T. S.
Alonso, A.
Baldzuhn, J.
Beidler, C. D.
Biedermann, C.
Bozhenkov, S.
Brunner, K. J.
Damm, H.
Hirsch, M.
Giannone, L.
Drewelow, P.
Effenberg, F.
Fuchert, G.
Hammond, K. C.
Hfel, U.
Killer, C.
Knauer, J.
Laqua, H. P.
Laube, R.
Pablant, N.
Pasch, E.
Penzel, F.
Rahbarnia, K.
Reimold, F.
Thomsen, H.
Winters, V
Wagner, F.
Klinger, T.
PHYSICAL REVIEW LETTERS, 2019, 123 (02)
[37] Realization of the requirements for a safe operation of Wendelstein 7-X
Schacht, J.
Naujoks, D.
Pingel, S.
Woelk, A.
Herbst, U.
Degenkolbe, S.
Winter, A.
Vilbrandt, R.
Bosch, H. -S.
FUSION ENGINEERING AND DESIGN, 2020, 152
[38] ECE Diagnostic for the initial Operation of Wendelstein 7-X
Hirsch, Matthias
Hoefel, Udo
Oosterbeek, Johan Willem
Chaudhary, Neha
Geiger, Joachim
Hartfuss, Hans-Juergen
Kasparek, Walter
Marushchenko, Nikolai
van Milligen, Boudewijn
Plaum, Burkhard
Stange, Torsten
Svensson, Jakob
Tsuchiya, Hayato
Wagner, Dietmar
McWeir, Gavin
Wolf, Robert
20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20), 2019, 203
[39] The magnet system of Wendelstein 7-X stellarator in operation
Risse, Konrad
Rummel, Thomas
Bosch, Hans-Stephan
Bykov, Victor
Carls, Andre
Fuellenbach, Frank
Moennich, Thomas
Nagel, Michael
FUSION ENGINEERING AND DESIGN, 2018, 136 : 12 - 16
[40] First demonstration of radiative power exhaust with impurity seeding in the island divertor at Wendelstein 7-X
Effenberg, F.
Brezinsek, S.
Feng, Y.
Koenig, R.
Krychowiak, M.
Jakubowski, M.
Niemann, H.
Perseo, V
Schmitz, O.
Zhang, D.
Barbui, T.
Biedermann, C.
Burhenn, R.
Buttenschoen, B.
Kocsis, G.
Pavone, A.
Reimold, F.
Szepesi, T.
Frerichs, H.
Gao, Y.
Hergenhahn, U.
Kwak, S.
Otte, M.
Pedersen, T. Sunn
NUCLEAR FUSION, 2019, 59 (10)

← 1 2 3 4 5 →