Zobrazeno 1 - 10 of 35 pro vyhledávání: '"H.-U. Nickel"'
1
Preparation and Properties of 3D Screen-Printed RF Components
Autor: H.-U. Nickel, G. Addamo, T. Studnitzky, M. Stater, M. Dressler, O. Peverini
Publikováno v: 2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), Bochum, Germany, Germany, 16-18/7/2019
info:cnr-pdr/source/autori:M. Dressler ; T. Studnitzky ; M. Stäter ; O. Peverini ; G. Addamo ; H.-U. Nickel/congresso_nome:2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)/congresso_luogo:Bochum, Germany, Germany/congresso_data:16-18%2F7%2F2019/anno:2019/pagina_da:/pagina_a:/intervallo_pagine
This paper reports on the preparation procedure of 3D screen printed RF copper components which were (i) printed in stainless steel and subsequently copper plated, and (ii) printed directly in copper. The RF properties were measured and showed promis
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f17e43b58624faa034f668f4c837f001
https://doi.org/10.1109/imws-amp.2019.8880065
Zobrazit plný text záznamu
2
Feasibility study of the eu home team on a 170GHz 1MW CW gyrotron for ECH on ITER
Autor: T. M. Tran, A. Wien, Manfred Thumm, A. Möbius, C.T. Iatrou, H.-U. Nickel, G. Tonon, D.R. Whaley, P. Norajitra, G. Bon Mardion, Minh Quang Tran, M. Pain, Stefan Kern
Publikováno v: International Journal of Infrared and Millimeter Waves. 16:1129-1158
The gyrotron system for ECH and burn control on ITER requires at least 50MW of RF power at frequencies near 170GHz operating in CW. To meet these requirements, high efficiency gyrotron tubes with greater than or equal to 1MW power output capability a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::07bed99cb32949a418604f3cf64b9d28
https://doi.org/10.1007/bf02068283
Zobrazit plný text záznamu
4
Mode competition using TE03gyrotron cavities
Autor: H.-U. Nickel, G. Gantenbein, G. Dammertz, T. Geist, Bernhard Piosczyk, G. Hochschild, M. Kuntze, Edith Borie, Manfred Thumm, O. Dumbrajs, B. Jödicke
Publikováno v: International Journal of Electronics. 72:687-720
The gyrotron is a powerful source of millimetre wave radiation. Fusion applications require more power per tube than is currently available This in turn means that the resonator must be highly overmoded, with a dense mode spectrum, which leads to mod
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46dbd116bbb62694005328ff3584b327
https://doi.org/10.1080/00207219208925610
Zobrazit plný text záznamu
5
The impact of neutron irradiation on the performance of cryogenically cooled windows for electron cyclotron resonance heating
Autor: R. Heidinger, P. Norajitra, H.-U. Nickel, A. Hofmann
Publikováno v: Fusion Engineering and Design. 18:337-340
Monocrystalline Al2O3 (sapphire) operated at cryogenic temperatures is a promising material for gyrotron windows for electron cyclotron resonance heating of fusion plasmas. A design similar to the gyrotron window for 1 MW/140 GHz continuous wave tran
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49a68edee935809f1ad884e1572c778c
https://doi.org/10.1016/0920-3796(91)90148-j
Zobrazit plný text záznamu
6
Development of advanced high-power 140 GHz gyrotrons for fusion plasma applications
Autor: Edith Borie, G. Dammertz, M. Kuntze, O. Höchtl, H.-U. Nickel, Manfred Thumm, A. Wien, A. Mobius, Stefan Kern, C.T. Iatrou, Bernhard Piosczyk, C. Semmle
A TE 10, 4 gyrotron oscillator with advanced built-in quasi-optical mode converter and radial output in TEM 00 (94.5% mode purity) was operated at 0.50 MW with 8 ms pulse duration and 32% output efficiency (38% electronic efficiency). The maximum out
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06d442b3e4001ab6090ce6815e3ec1b4
https://doi.org/10.1016/b978-0-444-82220-8.50092-3
Zobrazit plný text záznamu
7
Development of High Power 140 GHz Gyrotrons at KfK for Applications in Fusion
Autor: Manfred Thumm, Bernhard Piosczyk, M. Kuntze, H.-U. Nickel, Günter Dammertz, E. Borie, Olgierd Dumbrajs, Gerd Gantenbein, A. Mobius
The state of the development work of 140 GHz high power gyrotrons at KfK is given. In particular, the design and experimental results of a 0.5 MW, TE10,4 - gyrotron tube are described. In short pulse operation an rf-output power of 0.69 MW has been o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::31bd7e70c351aa7c94c353ba1cfee3e4
https://doi.org/10.1016/b978-0-444-89995-8.50117-x
Zobrazit plný text záznamu
8
Frequency step-tunable 0.5 MW, 140 GHz gyrotron for fusion plasma applications
Autor: M. Kuntze, Bernhard Piosczyk, H.-U. Nickel, Edith Borie, G. Dammertz, A. Mobius, Manfred Thumm, G. Gantenbein
Publikováno v: International Conference on Plasma Sciences (ICOPS).
Summary form only given. The state of development work at KfK Kernforschungszentrum Karlsruhe on 140-GHz high-power gyrotrons for EC wave applications is presented. In particular, the design and experimental results for a 0.5-MW TE/sub 10,4/ gyrotron
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::413e1603e121b71b7cacd6607844e995
https://doi.org/10.1109/plasma.1993.593539
Zobrazit plný text záznamu
10
Surface melting at ceramic windows due to high-power millimeter waves
Autor: H.-U. Nickel
Publikováno v: 16th International Conference on Infrared and Millimeter Waves.
A mechanism limiting the lifetime of high-power millimeter wave windows is the degradation of the ceramic which is exposed to gas. We first observed this phenomena on the air side (atmospheric pressure) of a plane circular waveguide window (Al 2 O 3
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eec7553275c9dc1b49591332b20b41c2
https://doi.org/10.1117/12.2297942
Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání

Omezení vyhledávání
Plný text Recenzováno Digitální knihovna AV ČR
Zdroje