NDLI: Investigation of the role of X-ray photons in the pre-breakdown current in vacuum interrupter gaps

Content Provider	IEEE Xplore Digital Library
Author	Hencken, K.
Copyright Year	2012
Description	Author affiliation: ABB Switzerland Ltd., Corporate Research, Segelhofstr. 1K, 5405 Baden 5 Dättwil, Switzerland (Hencken, K.)
Abstract	It is well known, that vacuum interrupters produce x-ray radiation. This is due to the high energy of the electrons accelerated in the vacuum gap before hitting the anode. Part of this energy is released in the form of high energy photons, that is x-ray radiation. Whereas this is mostly seen as a health and safety issue, it was discussed recently that x-ray radiation could play a role in the dielectric breakdown of vacuum gaps. The assumed mechanism is, that photons produced in the anode cross the gap and release secondary electrons from the cathode, amplifying the total current flowing in the gap. In addition backscattered electrons enhance the total photon yield as well. With the help of the MC simulation code PENELOPE we analyze the production of both x-rays and secondary electrons for gap voltages between 12 and 42kV. The electric field in the gap and therefore the returning of the electrons is included in the simulation. We find that these backscattered electrons enhance the x-ray photon yield. But the total number of photons produced and also the number of secondary electrons released from the cathode remains small. Their total yield in comparison with the number of primary electrons is rather small. We therefore conclude that x-ray photons play only a minor role in explaining the pre-breakdown current flowing through the gap in vacuum interrupters.
Starting Page	5
Ending Page	8
File Size	313672
Page Count	4
File Format	PDF
ISBN	9781467312639
ISSN	10932941
e-ISBN	9781467312660
e-ISBN	9781467312653
DOI	10.1109/DEIV.2012.6412436
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-02
Publisher Place	Russia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photonics Anodes Electric fields Cathodes Copper Production Microscopy
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Software

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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