Abstract. The possibility of L – band klystron’s creation for accelerator
with efficiency higher than 80% by means of two core oscillations of BAC –
method of electron grouping is discussed. The conditions for the formation of a
convergent bunch in the BAK – klystron are also discussed in this paper.
Correctness of grouping idea was confirmed by successful tests of first
experimental samples of multiple-beam klystrons. The experimental S – band BAŃ - klystrons with an output power level of 6 ÷ 7 MW have a
maximum efficiency of 66%, which allows to use the proposed BAŃ – method for
creating powerful klystrons with high efficiency. The proposed new method of
the electron beam grouping is also employed for single-beam klystron designs.
Using a system with two BAC – oscillations in the electrodynamic system makes
it possible to significantly increase the resultant efficiency of the klystron.
This is confirmed by the results of the electrodynamic system optimization of a
13 – cavities (including 2 group of 3 BAC – cavities) single – beam klystron
with two BAC – oscillations, which can be used in accelerator technology. The
efficiency of such a klystron can reach 82% at a reasonable length of the
anode.
Key words: vacuum
electronics, klystron, BAC method.
References
1. I. Guzilov, “BAC Method of Increasing
the Efficiency in Klystrons”. IEEE Vacuum Electron Sources Conference (IVESC2014),
Russia, Saint Petersburg, June
29-July 4, 2014. URL:
http://ieeexplore.ieee.org/document/6891996/
2. I. Guzilov, R. Egorov, O.
Maslennikov, G. Mcmonagle, I.Syratchev, B. Woolley “Commercial Prototype of
High Efficiency S-band Pulsed BAC MBK”. IEEE Vacuum Electron Sources
Conference (IVESC2016), Korea, Seoul, October 18-20, 2016.
3. I.Guzilov, O.Maslennikov,
R.Egorov, I.Syratchev, V.Kobets, A.Sumbaev. Comparison of 6 MW S-band Pulsed
BAC MBK with the Existing SBKs. 18th International Vacuum
Electronics Conference, p. 68, London, April 24-26, 2017.
4.
R. V. Egorov, I. A. Guzilov, O. Y. Maslennikov.
Pulsed 6 MW BAC multiple-beam klystron.
Zhurnal Radioelektroniki - Journal of
Radio Electronics, 2017, No. 7,
URL:
http://jre.cplire.ru/jre/jul17/3/text.pdf
5.
R. V. Egorov, I. A. Guzilov, O. Y. Maslennikov, V. L. Savvin.
About possibilities of increasing the output power of BAC klystrons.
Zhurnal Radioelektroniki - Journal of
Radio Electronics, 2017, No. 10,
URL:
http://jre.cplire.ru/jre/oct17/12/text.pdf
6. Konnov
A.V. and Malykhin A.V. Frequency-domain code Dev. 5.1 for analysis of coupled
cavity traveling wave tubes, klystrons and their hybrids, IVEC 2005, Noordwijk,
Netherlands, pp. 195-198.
7. ANSYS
HFSS (High Frequency Structure Simulator). 3D Electromagnetic Field Simulator for RF and
Wireless Design [ýëĺęňđîííűé đĺńóđń]. URL:
http://www.ansys.com/products/electronics/ansys-hfss
For citation:
R. V. Egorov, I. A. Guzilov, O. Y. Maslennikov, V. L. Savvin.
About
possibilities of applying two BAC oscillations in klystron with higher efficiency.
Zhurnal Radioelektroniki - Journal of
Radio Electronics. 2018. No. 9. Available at
http://jre.cplire.ru/jre/sep18/15/text.pdf
DOI
10.30898/1684-1719.2018.9.15