Structural and Vibrational Analysis of 42 GHz 200 kW Gyrotron

Bhattacharya, R and Sharma, T and Sahu, NK and Singh, N and Khatun, H and Sinha, AK (2012) Structural and Vibrational Analysis of 42 GHz 200 kW Gyrotron. In: National Conference on Recent Trends in Microwave Techniques and Applications (Microwave - 2012), July 30 - August 1, 2012, S.S. Jain Subodh P.G. College, Jaipur and University of Rajasthan . (Submitted)

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Abstract

Gyrotron is a fast wave microwave device which can produce few hundred kilowatts to few megawatts at millimeter and submillimeter frequency range [1-2]. First time in India, multi-institutional project sponsored by DST, New Delhi, on design and development of 42 GHz, 200 kW gyrotron is being carried out at CEERI, Pilani. The developed gyrotron will be used in Tokamak system at IPR, Gandhinagar. The 42 GHz gyrotron is a dimensionally huge and bulky device. The length is about 2.2 m and weight is approximately 100 kg. The main components of gyrotron are magnetron injection gun (MIG), beam tunnel, cavity, collector and window. The materials mainly used for component fabrication are molybdenum, monel, OFHC copper, high voltage ceramic and SS304L. Different joining techniques have been used according to the material of components and to maintain vacuum of 10-9 mbar in the sealed-off tube. The techniques used are brazing, laser welding, TIG welding etc. The brazing alloy used in brazing are OFHC copper (1080° C), Ni-Cu (1030° C) and Au-Cu (1010° C). In order to handle the large dimension tube without disturbing the vacuum, structural and vibrational analyses are required. The analysis helps in deciding the handling of the tube safely from any kind of wear and tear. The analyses also help to determine the maximum bearing load capacity of the tube. Thus, the study on stress analysis of whole device and its component with and without considering the vibration factor is performed using ANSYS software. The maximum stress is observed near the joining of cavity and beam tunnel i.e. 2.443 MPa, whereas the natural vibration enhanced the stress at the same point by 144.83 MPa.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	?? TK ?? Microwave Tubes > Gyrotrons
Divisions:	Microwave Tubes
Depositing User:	Mr. Jitendra Nath Bajpai
Date Deposited:	05 Apr 2013 10:45
Last Modified:	22 May 2013 04:43
URI:	http://ceeri.csircentral.net/id/eprint/32

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