Abstract
In this paper thermal and structural analysis for 170 GHz, 1 MW gyrotron interaction cavity and the effect of structural deformation on beam wave interaction is presented. Finite element analysis codes ANSYS has been used for the thermal and structural analysis. Electromagnetic simulator-MAGIC, a Particle-in-Cell (PIC) code, has been used to carry out the effect of the radial expansion of the interaction cavity on beam wave interaction. The change in output power and resonant frequency for operating mode TE34,10 due to thermal expansion is 10 kW and 0.07 GHz, respectively. These values are under the tolerance limit of power and frequency of the gyrotron. The major variation is found in the power growth stability time.
Similar content being viewed by others
References
V.A. Flyagin, A.V. Gaponov, I. Petelin, V.K. Yulpatov, The Gyrotron. IEEE Tr. Microw. TheoryTech. 25, 514–521 (1977)
M. Thumm, Novel Applications of Millimeter and Submillimeter Wave Gyro-Devices, Int. J. Infrared Millim. Terahertz Wave 22, 377–386 (2001)
K.L. Felch, B.G. Danly, H.R. Jory, K.E. Kreischer, W. Lawson, B. Levush, R.J. Temkin, Characteristics and Applications of Fast-Wave Gyro- Devices. Proc. IEEE 87, 752–781 (1999)
A. Kasugai, K. Sakamoto, K. Takahashi, K. Kajiwara, N. Kobayashi, Steady-state operation of 170 GHz–1 MW gyrotron for ITER. Nucl. Fusion 48, 054009 (2008)
K.A. Avramides, O. Dumbrajs, S. Kern, I. Gr. Pagonakis, J.L. Vomvoridis. Mode Selection for a 170 GHz, 1 MW GYROTRON, 35th EPS Conference on Plasma Phys. Hersonissos, 9–13 June 2008
ANSYS help guide, version 10, ANSYS Inc
MAGIC User Mannual: 2007 version of Magic 3D, ATK Mission Research, Washington
N. Kumar, U. Singh, A. Kumar, H. Khatun, T.P. Singh, A.K. Sinha, Numerical analysis of interaction cavity for 1.5 MW/127.5 GHz Gyrotron. J. Fusion Energ. 30, 01–06 (2011)
M.V. Kartikeyan, E. Borie, M. Thumm, Gyrotrons High-Power Microwave and Millimeter Wave Technology (Springer, Berlin, Germany, 2004)
C.J. Edgcombe (eds) Gyrotron Oscillators: Their Principles and Practice (Taylor & Francis, London, U.K., 1993)
F.P Incropera, D.P. Dewitt. Introduction to Heat Transfer, 3rd edn. (Wiley, New York, 1996)
J. Koner, A.K. Sinha. Wall loss and thermal analysis of 200 kW (CW), 42 GHz Gyrotron cavity, Int. J. Microw. Opt. Technol. 4, 18–20 (2009)
A. Kumar, N. Kumar, U. Singh, H. Khatun, V. Vyas, A.K. Sinha. Design of interaction cavity for 170-GHz, 1 MW Gyrotron for ECRH application, Vacuum doi:10.1016/j.vacuum.2011.06.002, (2011) (online)
Acknowledgment
The authors are pleased to acknowledge the support of Dr. Chandra Shekhar, Director, CEERI Pilani and Dr. SN Joshi, National Co-coordinator of Gyrotron. The authors also wish to thank the team members of gyrotron for helpful discussions. Thanks are also due to Council of Scientific and Industrial Research (CSIR) for awarding the Senior Research Fellowship to Mr. Anil Kumar.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kumar, A., Kumar, N., Singh, U. et al. Thermal and Structural Analysis and its Effect on Beam-Wave Interaction for 170-GHz, 1-MW Gyrotron Cavity. J Fusion Energ 31, 164–169 (2012). https://doi.org/10.1007/s10894-011-9451-y
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10894-011-9451-y