Third harmonic CW gyrotron with operating frequency 1.2 THz for a DNP /NMA spectroscopy

Autor: Manuilov V.N., T. Idehara, S. Mitsudo, O. Dumbrajs, Glyavin M. Yu, Tsvetkov A.I., Bandurkin I.V., Fedotov A.E.

Publikováno v: 2019 International Vacuum Electronics Conference (IVEC).

The project of a third harmonic CW gyrotron with an output frequency of 1.185 THz (wavelength about $\pmb{250\ \mu}\mathbf{m}$ ) and an output power of 100–200 W, intended for DNP/NMR spectroscopy applications is described. The project based on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0dd402622b6d0a8623d7094c0c392c61
https://doi.org/10.1109/ivec.2019.8745302

Numerical optimization of high-order volume-mode gyrotron cavities with respect to mode conversion and mode competition

Autor: O. Dumbrajs

Publikováno v: 17th International Conference on Infrared and Millimeter Waves.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ae60ea48929d4249c961d21665f682a
https://doi.org/10.1117/12.2298247

Analysis of equations arising in gyrotron theory

Autor: Uldis Strautins, Janis Cepitis, O. Dumbrajs, Harijs Kalis, Andrejs Reinfelds

Publikováno v: Scopus-Elsevier
Nonlinear Analysis, Vol 17, Iss 2 (2012)

The gyrotron is a microwave source whose operation is based on the stimulated cyclotron radiation of electrons oscillating in a static magnetic field. Powerful gyrotrons can be used to heat nuclear fusion plasma. In addition, they have found a wide u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eee9c00bf9a51d5ad4d1599fa5069100
https://doi.org/10.15388/na.17.2.14064

EU developments of the ITER ECRH system

Autor: S. Alberti, D. Fasel, S. Cirant, G. Ramponi, C. Lievin, A. G. A. Verhoeven, Jean-Philippe Hogge, René Chavan, M. A. Henderson, Emanuele Poli, R. Heidinger, W. Kasparek, O. Dormicchi, T. Bonicelli, G. Taddia, M. Q. Tran, P. Benin, O. Sauter, Arkady Serikov, David Campbell, T. P. Goodman, H. Zohm, G. Saibene, Manfred Thumm, B. Piosczyk, O. Dumbrajs, G. Dammertz

Publikováno v: Fusion Engineering and Design, 82, 454-462
Fusion engineering and design 82 (2007): 454–462. doi:10.1016/j.fusengdes.2007.01.029
info:cnr-pdr/source/autori:Henderson, M. A.; Alberti, S.; Benin, P.; Bonicelli, T.; Chavan, R.; Campbell, D.; Cirant, S.; Dammertz, G.; Dormicchi, O.; Dumbrajs, O.; Fasel, D.; Goodman, T. P.; Heidinger, R.; Hogge, J.-P.; Kasparek, W.; Lievin, C.; Piosczyk, B.; Poli, E.; Ramponi, G.; Saibene, G.; Sauter, O.; Serikov, A.; Taddia, G.;Thumm, M.; Tran, M. Q.; Verhoeven, A. G. A.; Zohm, H./titolo:EU Development of the ITER ECRH System/doi:10.1016%2Fj.fusengdes.2007.01.029/rivista:Fusion engineering and design/anno:2007/pagina_da:454/pagina_a:462/intervallo_pagine:454–462/volume:82

The EU will be providing the largest contribution to the ITER electron cyclotron (EC) heating and current drive (H&CD) system (20 MW, CW at 170 GHz). The contribution includes one third of the H&CD gyrotrons, their associated power supplies and four

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9f7a6224d3e04dc4a2985349b9dc0e7
https://doi.org/10.1016/j.fusengdes.2007.01.029

Stochastic sawtooth reconnection in ASDEX Upgrade

Autor: V Igochine, O Dumbrajs, H Zohm, A Flaws, the ASDEX Upgrade Team

Publikováno v: Nuclear Fusion, v.47, 23-32 (2007)

In this paper we investigate non-complete sawtooth reconnection in the ASDEX Upgrade tokamak. Such reconnection phenomena are associated with internal m/n = 1/1 kink mode which does not vanish after the crash phase (as would be the case for complete

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::594130c87ffad18d1bcb17bbbc3a0d63
https://doi.org/10.1088/0029-5515/47/1/004