NDLI: Behaviors of excited N, $N^{+}$ and NH in modulated induction thermal plasmas

Content Provider	IEEE Xplore Digital Library
Author	Tanaka, Y. Hayashi, K. Ito, T. Uesugi, Y.
Copyright Year	2008
Description	Author affiliation: Div. Electr. Eng. & Comp. Sci., Kanazawa Univ., Ishikawa (Tanaka, Y.; Hayashi, K.; Ito, T.; Uesugi, Y.)
Abstract	Summary form only given. High-power high-pressure induction thermal plasmas have been widely used in many material processing fields such as syntheses of nanopowders and thermal barrier coatings etc, because they have advantages such as remarkably higher enthalpy and higher radical density than cold plasmas, and also little contamination. To functionalize induction thermal plasmas, we have developed a pulse-modulated induction thermal plasma (PMITP). This PMITP offers the possibility of controlling temperature, chemical reaction and gas flow fields in thermal plasmas, and then is expected as a radical and heat source for material processing. Recently we found that one can create more nitrogen atomic density in $Ar-N_{2}$ PMITP than in a non-modulated convectional thermal plasma under the same power condition. In this report, time variation in radiation spectra from Ar, N, $N_{2}$ $^{+}$ and NH was measured to study dynamic behaviors of these particles in Ar PMITP with $N_{2}/H_{2}$ additional gases. The radiation intensities were observed using a time resolved CCD. In thermal plasma material processing, the densities of N and NH are considered to be crucial for rapid surface nitriding process of materials. From this measurement, their inherent periodical behaviors were found in the radiation intensities of these spectra following the pulse modulation of the coil current sustaining PMITP. Furthermore, we compared the time-averaged radiation intensities for N, $N_{2}$ $^{+}$ and NH in a PMITP with those in a non-modulated conventional induction thermal plasma under the same input power condition. Results showed increases in the time- averaged radiation intensities of N and NH by the pulse- modulation of the coil current compared with that in a non- modulated thermal plasma.
Starting Page	1
Ending Page	1
File Size	57081
Page Count	1
File Format	PDF
ISBN	9781424419296
ISSN	07309244
DOI	10.1109/PLASMA.2008.4590828
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasmas Atmospheric measurements Coils Atomic measurements Particle measurements Plasma measurements Argon
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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