Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Kasparek Walter"'
Autor:
Schubert Martin, Stober Joerg, Herrmann Albrecht, Grigore Eduard, Kasparek Walter, Lechte Carsten, Monaco Francesco, Petzold Bernhard, Plaum Burkhard, Poli Emanuele, Ruset Cristian, Vorbrugg Stefan, Wagner Dietmar
Publikováno v:
EPJ Web of Conferences, Vol 277, p 02008 (2023)
Reflecting gratings have been installed in the vacuum vessel of ASDEX Upgrade for all beamlines of the electron cyclotron resonance heating system. Potentially unabsorbed millimetre wave power after the first pass through the plasma is redirected tow
Externí odkaz:
https://doaj.org/article/71ee14641bd247248efbc105912c7a2c
Autor:
Lechte Carsten, Kasparek Walter, Plaum Burkhard, Leuterer Fritz, Schubert Martin, Stober Jörg, Wagner Dietmar
Publikováno v:
EPJ Web of Conferences, Vol 203, p 04010 (2019)
High power mm waves for fusion plasma heating need to be elliptically polarised to ensure good absorption in the plasma. In some scenarios, electron cyclotron resonance heating (ECRH) at higher harmonics (X3 and O2) is used, but this has significant
Externí odkaz:
https://doaj.org/article/6abea8f9fd1d49288805d8873e08cb43
Autor:
Zach Alexander, Kasparek Walter, Lechte Carsten, Plaum Burkhard, Monaco Francesco, Schütz Harald, Stober Jörg, Idei Hiroshi, Hirth Thomas
Publikováno v:
EPJ Web of Conferences, Vol 203, p 04018 (2019)
Transmission of high-power millimeter waves for ECRH is often realised with oversized corrugated circular waveguides. Coupling from the gyrotron source to the waveguide is typically done via matching mirrors in free space. Small alignment errors of t
Externí odkaz:
https://doaj.org/article/f8463b858bf74e22ab509df1c9596e3c
Autor:
Schubert Martin, Plaum Burkhard, Stober Jörg, Herrmann Albrecht, Kasparek Walter, Lechte Carsten, Leuterer Fritz, Monaco Francesco, Petzold Bernhard, Poli Emanuele, Vorbrugg Stefan, Wagner Dietmar
Publikováno v:
EPJ Web of Conferences, Vol 203, p 02009 (2019)
The electron cyclotron resonance heating system at ASDEX Upgrade (AUG) is currently being extended to eight similar Gyrotrons in total. Each Gyrotron operates at 105 and 140 GHz and is designed for up to 1 MW millimetre wave output power. A substanti
Externí odkaz:
https://doaj.org/article/22d667cff7474dac801df0a64d52a841
Autor:
Hirsch Matthias, Höfel Udo, Oosterbeek Johan Willem, Chaudhary Neha, Geiger Joachim, Hartfuss Hans-Jürgen, Kasparek Walter, Marushchenko Nikolai, van Milligen Boudewijn, Plaum Burkhard, Stange Torsten, Svensson Jakob, Tsuchiya Hayato, Wagner Dietmar, McWeir Gavin, Wolf Robert
Publikováno v:
EPJ Web of Conferences, Vol 203, p 03007 (2019)
The ECE diagnostic at W7-X in its standard mode of operation measures in X2 mode polarization with a 32 channel radiometer in the frequency band around 140 GHz for central magnetic field 2.5T. The radiometer is calibrated by a noise source and the ov
Externí odkaz:
https://doaj.org/article/41320716b32841edba05e42d261ac664
Autor:
Ioannidis Zisis, Rzesnicki Tomasz, Albajar Ferran, Alberti Stefano, Avramidis Konstantinos, Bin William, Bonicelli Tulio, Bruschi Alex, Chelis Ioannis, Fanale Francesco, Gantenbein Gerd, Hermann Virgille, Hogge Jean-Philippe, Illy Stefan, Jin Jianbo, Jelonnek John, Kasparek Walter, Latsas George, Lechte Carsten, Legrand François, Pagonakis Ioannis, Sanchez Francisco, Schmid Martin, Schlatter Christian, Thumm Manfred, Tigelis Ioannis, Tran Minh Quang, Zisis Anastasios, Zein Andy
Publikováno v:
EPJ Web of Conferences, Vol 203, p 04006 (2019)
The European 1 MW, 170 GHz industrial CW prototype gyrotron has been designed within EGYC (European GYrotron Consortium) in collaboration with the industrial partner Thales Electron Devices (TED) and under the coordination of Fusion for Energy (F4E).
Externí odkaz:
https://doaj.org/article/36a612f88df34ea687d0a01d967ea573
Publikováno v:
EPJ Web of Conferences, Vol 203, p 04012 (2019)
An existing framework for the design of reflection gratings was reworked. It takes the astigmatic complex beam parameters and the orientations of the beam axes of the incident and reflected beams as input and synthesizes a grating, which transforms t
Externí odkaz:
https://doaj.org/article/b48b695ac7914c1dbb28030c5adb6112
Advanced electron cyclotron heating and current drive experiments on the stellarator Wendelstein 7-X
Autor:
Stange Torsten, Laqua Heinrich Peter, Beurskens Marc, Bosch Hans-Stephan, Bozhenkov Sergey, Brakel Rudolf, Braune Harald, Brunner Kai Jakob, Cappa Alvaro, Dinklage Andreas, Erckmann Volker, Fuchert Golo, Gantenbein Gerd, Gellert Florian, Grulke Olaf, Hartmann Dirk, Hirsch Matthias, Höfel Udo, Kasparek Walter, Knauer Jens, Langenberg Andreas, Marsen Stefan, Marushchenko Nikolai, Moseev Dmitry, Pablant Novomir, Pasch Ekkehard, Rahbarnia Kian, Mora Humberto Trimino, Tsujimura Toru, Turkin Yuriy, Wauters Tom, Wolf Robert
Publikováno v:
EPJ Web of Conferences, Vol 157, p 02008 (2017)
During the first operational phase (OP 1.1) of Wendelstein 7-X (W7-X) electron cyclotron resonance heating (ECRH) was the exclusive heating method and provided plasma start-up, wall conditioning, heating and current drive. Six gyrotrons were commissi
Externí odkaz:
https://doaj.org/article/f057d7cd77cb4dbcb0ccb3f3397e4fff
Autor:
Schubert Martin, Stober Jörg, Herrmann Albrecht, Kasparek Walter, Leuterer Fritz, Monaco Francesco, Petzold Bernhard, Plaum Burkhard, Vorbrugg Stefan, Wagner Dietmar, Zohm Hartmut
Publikováno v:
EPJ Web of Conferences, Vol 157, p 03047 (2017)
The ASDEX Upgrade electron cyclotron resonance heating operates at 105 GHz and 140 GHz with flexible launching geometry and polarization. In 2016 four Gyrotrons with 10 sec pulse length and output power close to 1 MW per unit were available. The syst
Externí odkaz:
https://doaj.org/article/363d3a982cad4e80821240ce5b002c57
Autor:
Alberti Stefano, Genoud Jérémy, Goodman Timothy, Hogge Jean-Philippe, Porte Laurie, Silva Miguel, Tran Trach-Minh, Tran Minh-Quang, Avramidis Konstantinos, Pagonakis Ioannis, Jin Jianbo, Illy Stefan, Gantenbein Gerd, Jelonnek John, Thumm Manfred, Bin William, Bruschi Alex, Garavaglia Saul, Moro Alessandro, Kasparek Walter, Legrand François, Perial Etienne, Rozier Yoan, Cismondi Fabio, Doelman Niek
Publikováno v:
EPJ Web of Conferences, Vol 157, p 03001 (2017)
The upgrade of the EC-system of the TCV tokamak has entered in its realization phase and is part of a broader upgrade of TCV. The MW-class dual-frequency gyrotrons (84 or 126GHz/2s/1MW) are presently being manufactured by Thales Electron Devices with
Externí odkaz:
https://doaj.org/article/4e8178b72743454880a5148719ff5bf7