NDLI: Novel Trigger Mechanism High-Power Switch: The Electrostatic Plasma Injection Switch

Content Provider	IEEE Xplore Digital Library
Author	Chung, M. Kunhardt, E.
Copyright Year	1973
Abstract	High-power gas switches like the Pseudospark have been developed for decades, and past research has focused on the trigger mechanism of Pseudospark. This paper presents a new type of switch called the electrostatic plasma injection switch (EPIS), which uses transmission-line reflections of incoming trigger pulse to generate voltage gradients on a vertical multisection trigger structure that extends from a hollow cathode into a symmetrical hollow anode. Low-current preionization glow discharge at the bottom of the cathode region provides seed electrons for fast turn on. The trigger voltage injects plasma into the trigger structure and then accelerates plasma vertically into the gap between anode and cathode. Similar to Pseudospark, a superdense-glow-discharge plasma is responsible for the high current. The trigger electron density is measured by optical spectroscopy to be 3times10¹⁵/cm³ inside the hollow cathode and 8times10¹⁴/cm³ at the anode-cathode gap. plasma injection speed is 1-4times10⁷ cm/s between 0.1and 0.4-torr pressure and is proportional to pressure and trigger voltage. Delay time decreases when the pressure increases. The EPIS has been operated at 16.6-kV hold-off voltage and 4.96 kA with 95 mtorr of hydrogen. This switch operates in the left-hand branch of the Paschen curve, as do Thyratron and Pseudospark, but it should provide better trigger reliability and higher current capability. Hold-off voltage is limited by local field emission. This device is operational, and waveforms of anode voltage, anode current, trigger voltage, and plasma emissions are recorded. Future applications are discussed
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1626
Ending Page	1639
Page Count	14
File Size	1022598
File Format	PDF
ISSN	00933813
Volume Number	34
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Electrostatics Voltage Plasma measurements Cathodes Anodes Plasma density Plasma accelerators Electrons Transmission lines trigger Gas discharge high-power switch Pseudospark
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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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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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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