NDLI: Breakdown law and post-breakdown current-voltage characteristics of emission-driven microplasmas

Content Provider	IEEE Xplore Digital Library
Author	Venkattraman, Ayyaswamy
Copyright Year	2014
Description	Author affiliation: School of Engineering, University of California, Merced, USA (Venkattraman, Ayyaswamy)
Abstract	Microplasmas are traditionally defined as plasmas that are confined to gaps that are less than 1 mm and have found applications in nanoparticle synthesis, plasma medicine and flow control. More recently, there has been significant emphasis on microplasmas operating at even smaller gaps that are less than 100 µm. It is now well-established that the breakdown voltages at microgaps deviate from Paschen law due to field emission from the cathode [1]. Numerical simulations [2,3], experiments [2] and theoretical studies [1,3] have focused on both pre-breakdown and certain basic post-breakdown characteristics [4] of these discharges. This talk will present an extension to these studies by presenting a breakdown law for microplasmas that are driven by a combination of both thermionic and field emission. The emission of electrons from the cathode is governed by the thermo-field theory [5]. The cathode source current is enhanced due to ionization in the gap, the secondary electron emission and the enhancement in emission current due to the ions that reach the cathode. Equations are formulated to describe the steady-state current density of the pre-breakdown Townsend dark discharges. The condition for absence of a steady-state pre-breakdown state is used to determine the breakdown voltage as a function of cathode temperature and applied voltage and present a scaling law for thermo-field emission driven breakdown. The theoretical results for the pre-breakdown state and breakdown voltage are validated using one-dimensional particle-in-cell with Monte Carlo collisions (PIC/MCC) simulations using a modified version of XPDP1 code. Finally, a theoretical model for the post-breakdown state comprising a cathode-fall and a quasi-neutral region is formulated to obtain current density as a function of applied voltage and then validated using constant current density PIC/MCC simulations. The variation of electron energy distribution function across the gap is also presented.
Starting Page	1
Ending Page	1
File Size	43866
Page Count	1
File Format	PDF
ISBN	9781479927111
e-ISBN	9781479927135
DOI	10.1109/PLASMA.2014.7012345
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Steady-state Ions Cathodes Monte Carlo methods Switches
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
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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