Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009

Volumes:
Volume 78, 2019 Volume 77, 2018 Volume 76, 2017 Volume 75, 2016 Volume 74, 2015 Volume 73, 2014 Volume 72, 2013 Volume 71, 2012 Volume 70, 2011 Volume 69, 2010 Volume 68, 2009 Volume 67, 2008 Volume 66, 2007 Volume 65, 2006 Volume 64, 2005 Volume 63, 2005 Volume 62, 2004 Volume 61, 2004 Volume 60, 2003 Volume 59, 2003 Volume 58, 2002 Volume 57, 2002 Volume 56, 2001 Volume 55, 2001 Volume 54, 2000 Volume 53, 1999 Volume 52, 1998 Volume 51, 1997

Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v74.i3.70
pages 247-259

MULTIPACTOR DISCHARGES IN GAPS OF THE ACCELERATION CHANNEL AND OTHER AREAS OF RESONATOR STRUCTURE OF THE LINEAR ION ACCELERATOR

L. D. Lobzov
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108
N. G. Shulika
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108
V.F. Kovalenko
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108, Ukraine
V. N. Belan
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108
O.N. Shulika
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108, Ukraine
A.P. Podolak
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108, Ukraine
L.N. Makarova
National Scientific Center "Kharkiv Physical and Technological Institute", 1, Academicheskaya St., Kharkiv, 61108, Ukraine

RESUMO

Multipactor discharges, accompanied by electron reproduction of secondary electron emission (SEE) and reaching electron close of electrodes in linear ion accelerator (LIA) are undesirable phenomena that must be eliminated. In the scientific literature there is no information on disruption of the accelerator characteristics, distorted by discharges in its different areas. In such cases, discharge areas outside the acceleration channel can be visually identified and eliminated. In this study, a modern accelerator excitation circuit is used, consisting of two identical HF-sources with independent positive feedbacks. They operation together on the same resonant load (primary or perturbed frequency) which allows to provide both sustainable HF excitation voltages and suppression of multipactor processes and discharges. Examination of the internal structure LIA showed that there are intense glow discharges in other areas of the accelerator. At the entrance it is a gap of 1.353 cm with sections of parallel end surfaces of the first drift tubes. In the periphery it is a spurious slot of ~ 0.1...0.2 mm (measured with the vacuum jacket open), formed by the surface structure and the end of the copper plate (patch that closes the unnecessary through hole); the tin solder between them was partially sublimated. From the analysis of pulse distortion of the reference voltages and total currents of SEE, it became clear that the basic rules relevant to the research subject are observed. Visual observation of the radiant emittance of the discharge area and the analysis of time dynamics of these distortions of voltage pulse shapes and electronic currents allowed to characterize unambiguously both discharges as multipactor ones, which greatly facilitates their research and selection of methods for their elimination. The investigation allowed us to better understand the conditions of development and control of multipactor processes and discharges in high−Q (Qo >> 11) resonator structures, which is essential to provide time-constant characteristics of a linear ion accelerator.


Articles with similar content:

VARIATION OF ENERGY EFFICIENCY IN OXIDE REMOVAL USING CATHODE SPOTS WITH ELECTRODE-GAP WIDTH
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.11, 2007, issue 1
Koichi Takeda, M. Sugimoto, K. Ishizaka
PRINCIPLES OF UNIVERSALIZATION OF MICROWAVE FACILITIES FOR DIAGNOSTICS OF SMALL-SCALE OBJECTS
Telecommunications and Radio Engineering, Vol.75, 2016, issue 14
A.V. Levchenko, I. M. Shcherban, Yu. Ye. Gordienko
PLASMA GENERATION IN A LOW-PRESSURE HOLLOW-CATHODE NON-SELF-SUSTAINED GLOW DISCHARGE
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.17, 2013, issue 2-3
Yury Akhmadeev, P. M. Schanin, Nikolay N. Koval, I. V. Lopatin
MULTIBAND PIRAMIDAL HORN ANTENNAS WITH IDENTICAL MAIN LOBE WIDTHS OF THE DIRECTIONAL PATTERNS
Telecommunications and Radio Engineering, Vol.73, 2014, issue 9
N. N. Gorobets, A. A. Yelizarenko
Experimental Study on the Temperature and Pressure Distribution of Steam Jet in Subcooled Water Flow in a Restricted Channel
International Heat Transfer Conference 15, Vol.53, 2014, issue
Tao Li, Jiping Liu, Xiao-Ping Yang, Wei Han, Zong Xiao, Junjie Yan