Experimental Results of the Novel 1.5-MW-Class 140-GHz Continuous-Wave Gyrotron for the Wendelstein 7-X Stellarator

Authors: Ponomarenko, S., Laqua, H.P., Avramidis, K.A., Gantenbein, G., Gontard, J., Hollmann, F., Illy, S., Ioannidis, Z.C., Jelonnek, J., Jin, J., Kohler, S., Krier, L., Leggieri, A., Legrand, F., Lietaer, G., Lievin, C., Marsen, S., Moseev, D., Noke, F., Rzesnicki, T., Stange, T., Thumm, M., Wolf, R.C.

Source: IEEE Electron Device Letters IEEE Electron Device Lett. Electron Device Letters, IEEE. 45(12):2550-2553 Dec, 2024

Suppression of Parasitic Modes in a Cylindrical Gyrotron Beam Tunnel by a Wall Corrugation With Schroeder Diffuser Structures

Authors: Laqua, H.P., Ponomarenko, S.

Source: IEEE Transactions on Plasma Science IEEE Trans. Plasma Sci. Plasma Science, IEEE Transactions on. 52(6):2045-2049 Jun, 2024

Operational Characteristics of the 175-GHz Continuous-Wave Clinotron

Authors: Ponomarenko, S., Braune, H., Khutoryan, E., Kishko, S., Kovshov, Y., Kuleshov, A., Laqua, H.P., Moseev, D., Stange, T., Vlasenko, S.

Source: IEEE Transactions on Electron Devices IEEE Trans. Electron Devices Electron Devices, IEEE Transactions on. 70(11):5921-5925 Nov, 2023

ECCD operations in the second experimental campaign at W7-X

Authors: Zanini M., Laqua H.P., Stange T., Brandt C., Hirsch M., Höfel U., Marushchenko N., Neuner U., Rahbarnia K., Schilling J., Thomsen H., Wolf R.C.

Source: EPJ Web of Conferences, Vol 203, p 02013 (2019)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://www.epj-conferences.org/articles/epjconf/pdf/2019/08/epjconf_ec2018_02013.pdf; https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/a3ae4f4a58374ecdbc9f67fa17097a00

Overview of W7-X ECRH Results

Authors: Laqua H.P., Baldzuhn J., Braune H., Bozhenkov S., Brunner K.J., Kazakov Ye.O., Marsen S., Moseev D., Stange T., Wolf R.C., Zanini M.

Source: EPJ Web of Conferences, Vol 203, p 02002 (2019)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://www.epj-conferences.org/articles/epjconf/pdf/2019/08/epjconf_ec2018_02002.pdf; https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/de62bf17b0c84473ba149d01e8a01a59

Concurrent operation of 10 gyrotrons at W7-X experience and improvement opportunities

Authors: Braune H., Brunner K.J., Laqua H.P., Marsen S., Moseev D., Noke F., Purps F., Schneider N., Schulz T., Stange T., Uhren P., Wilde F.

Source: EPJ Web of Conferences, Vol 187, p 01003 (2018)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/d386ff75a74449dfb7b21f9fec4bea7f

Overview of W7-X ECRH Results in OP1.2a

Authors: Laqua H.P., Baldzuhn J., Braune H., Bozhenkov S., Brunner K.J., Kazakov Ye.O., Marsen S., Moseev D., Stange T., Wolf R.C., Zanini M.

Source: EPJ Web of Conferences, Vol 187, p 01011 (2018)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/6ee8b103c14943c5a07019a54a54a621

The W7-X ECRH gyrotron diamond output window: Oil and water cooled window performance at 1.5 MW operation

Authors: Aiello, G. ^{a, ⁎}, Gantenbein, G. ^b, Gorr, B. ^a, Jelonnek, J. ^b, Laqua, H.P. ^c, Meier, A. ^a, Scherer, T. ^a, Schreck, S. ^a, Strauss, D. ^a, Thumm, M. ^b

Source: In Fusion Engineering and Design February 2025 211

Optics for electron cyclotron resonance heating and collective Thomson scattering at the stellarator W7-X

Authors: Kasparek W., Erckmann V., Laqua H.P., Stange T., Weißgerber M., Lechte C., Plaum B., Moseev D., Leipold F., Petelin M., Brunner K.J., Braune H., Marsen S., Schneider N., Wolf R.C.

Source: EPJ Web of Conferences, Vol 149, p 01013 (2017)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/fd6d9d12d8564d12a206a761dd5b38e5

Continuous high power microwave heating at the W7-X stellarator

Authors: Brunner K.J., Braune H., Erckmann V., Kasparek W., Laqua H.P., Marsen S., Moseev D., Plaum B., Stange T., Weißgerber M.

Source: EPJ Web of Conferences, Vol 149, p 03011 (2017)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/e8437bc0a2084282a9d76dc6f939ffc1

Remote-Steering Launchers for the ECRH system on the Stellarator W7-X

Authors: Kasparek W., Lechte C., Plaum B., Zeitler A., Erckmann V., Laqua H.P., Weißgerber M., Bechtold A., Busch M., Szcepaniak B.

Source: EPJ Web of Conferences, Vol 87, p 04005 (2015)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/e4b2250b66d24dbd81b1f49869fcc56b

Experimental characterization of plasma start-up using ECRH in preparation of W7-X operation

Authors: Preynas M., Aßmus D., Igami H., Kado S., Kobayashi S., Kubo S., Laqua H.P., Mutoh T., Nagasaki K., Otte M., Shimozuma T., Stange T., Yoshimura Y.

Source: EPJ Web of Conferences, Vol 87, p 02005 (2015)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/69603eab8e8c425f85ecd90db991d134

ECRH and ECCD scenarios for W7-X

Authors: Laqua H.P., Helander P., Geiger J., Erckmann V., Beidler C. D., Marushchenko N. B., Maassberg H., Turkin Y.

Source: EPJ Web of Conferences, Vol 32, p 01004 (2012)

Subject Terms: Physics, QC1-999

File Description: electronic resource

Relation: https://doaj.org/toc/2100-014X

Access URL: https://doaj.org/article/6805347f97904370806b542330d40acb

Short-pulse frequency stabilization of a MW-class ECRH gyrotron at W7-X for CTS diagnostic

Authors: Krier, L., Avramidis, K.A., Braune, H., Gantenbein, G., Illy, S., Jelonnek, J., Laqua, H.P., Marsen, S., Moseev, D., Noke, F., Ruess, T., Stange, T., Thumm, M., Wolf, R.C.

Source: In Fusion Engineering and Design July 2023 192

Wendelstein 7-X Program—Demonstration of a Stellarator Option for Fusion Energy

Authors: Wolf, R.C., Beidler, C.D., Dinklage, A., Helander, P., Laqua, H.P., Schauer, F., Sunn Pedersen, T., Warmer, F.

Source: IEEE Transactions on Plasma Science IEEE Trans. Plasma Sci. Plasma Science, IEEE Transactions on. 44(9):1466-1471 Sep, 2016

Microwave stray radiation losses in vacuum windows

Authors: Oosterbeek, J.W., Stern, M., Braune, H., Ewert, K., Hirsch, M., Hollmann, F., Laqua, H.P., Marsen, S., Meier, A., Moseev, D., Noke, F., Reintrog, A., Stange, T., Wolf, R.C.

Source: In Fusion Engineering and Design October 2022 183

Measurements of satellite modes in 140 GHz wendelstein 7-X gyrotrons: An approach to an electronic stability control

Authors: Wilde, F., Laqua, H.P., Marsen, S., Stange, T., Avramidis, K. A., Gantenbein, G., Jelonnek, J., Illy, S., Pagonakis, I. Gr., Thumm, M.

Source: 2017 Eighteenth International Vacuum Electronics Conference (IVEC) Vacuum Electronics Conference (IVEC), 2017 Eighteenth International. :1-2 Apr, 2017

Relation: 2017 Eighteenth International Vacuum Electronics Conference (IVEC)

Stray radiation energy fluxes in ITER based on a multiresonator model

Authors: Moseev, D., Oosterbeek, J.W., Sirinelli, A., Corre, Y., Houry, M., Korsholm, S.B., Laqua, H.P., Marsen, S., Preynas, M., Rasmussen, J., Salewski, M., Stange, T., Udintsev, V.

Source: In Fusion Engineering and Design November 2021 172

Wendelstein 7-X on the path to long-pulse high-performance operation

Authors: Endler, M. ^*, Baldzuhn, J., Beidler, C.D., Bosch, H.-S., Bozhenkov, S., Buttenschön, B., Dinklage, A., Fellinger, J., Feng, Y., Fuchert, G., Gao, Y., Geiger, J., Grulke, O., Hartmann, D., Jakubowski, M., König, R., Laqua, H.P., Lazerson, S., McNeely, P., Naujoks, D., Neuner, U., Otte, M., Pasch, E., Sunn Pedersen, T., Perseo, V., Puig Sitjes, A., Rahbarnia, K., Rust, N., Schmitz, O., Spring, A., Stange, T., von Stechow, A., Turkin, Y., Wang, E., Wolf, R.C.

Source: In Fusion Engineering and Design June 2021 167

Design verification of the gyrotron diamond output window for the upgrade of the ECRH system at W7-X

Authors: Aiello, G. ^*, Avramidis, K.A., Gantenbein, G., Jelonnek, J., Jin, J., Laqua, H.P., Meier, A., Scherer, T., Strauss, D., Thumm, M.

Source: In Fusion Engineering and Design April 2021 165