skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Design of a portable optical emission tomography system for microwave induced compact plasma for visible to near-infrared emission lines

Abstract

A new non-invasive diagnostic system is developed for Microwave Induced Plasma (MIP) to reconstruct tomographic images of a 2D emission profile. A compact MIP system has wide application in industry as well as research application such as thrusters for space propulsion, high current ion beams, and creation of negative ions for heating of fusion plasma. Emission profile depends on two crucial parameters, namely, the electron temperature and density (over the entire spatial extent) of the plasma system. Emission tomography provides basic understanding of plasmas and it is very useful to monitor internal structure of plasma phenomena without disturbing its actual processes. This paper presents development of a compact, modular, and versatile Optical Emission Tomography (OET) tool for a cylindrical, magnetically confined MIP system. It has eight slit-hole cameras and each consisting of a complementary metal–oxide–semiconductor linear image sensor for light detection. The optical noise is reduced by using aspheric lens and interference band-pass filters in each camera. The entire cylindrical plasma can be scanned with automated sliding ring mechanism arranged in fan-beam data collection geometry. The design of the camera includes a unique possibility to incorporate different filters to get the particular wavelength light from the plasma. This OET systemmore » includes selected band-pass filters for particular argon emission 750 nm, 772 nm, and 811 nm lines and hydrogen emission H{sub α} (656 nm) and H{sub β} (486 nm) lines. Convolution back projection algorithm is used to obtain the tomographic images of plasma emission line. The paper mainly focuses on (a) design of OET system in detail and (b) study of emission profile for 750 nm argon emission lines to validate the system design.« less

Authors:
;  [1];  [2]
  1. Nuclear Engineering and Technology Programme, Indian Institute of Technology Kanpur, Kanpur (India)
  2. Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016 (India)
Publication Date:
OSTI Identifier:
22597079
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALGORITHMS; ANIONS; ARGON; CAMERAS; CYLINDRICAL CONFIGURATION; DESIGN; ELECTRON TEMPERATURE; ELECTRONS; EMISSION; FILTERS; HOLES; HYDROGEN; IMAGES; ION BEAMS; MICROWAVE RADIATION; OXIDES; PLASMA; SEMICONDUCTOR MATERIALS; THRUSTERS; TOMOGRAPHY

Citation Formats

Rathore, Kavita, Munshi, Prabhat, and Bhattacharjee, Sudeep. Design of a portable optical emission tomography system for microwave induced compact plasma for visible to near-infrared emission lines. United States: N. p., 2016. Web. doi:10.1063/1.4942768.
Rathore, Kavita, Munshi, Prabhat, & Bhattacharjee, Sudeep. Design of a portable optical emission tomography system for microwave induced compact plasma for visible to near-infrared emission lines. United States. https://doi.org/10.1063/1.4942768
Rathore, Kavita, Munshi, Prabhat, and Bhattacharjee, Sudeep. 2016. "Design of a portable optical emission tomography system for microwave induced compact plasma for visible to near-infrared emission lines". United States. https://doi.org/10.1063/1.4942768.
@article{osti_22597079,
title = {Design of a portable optical emission tomography system for microwave induced compact plasma for visible to near-infrared emission lines},
author = {Rathore, Kavita and Munshi, Prabhat and Bhattacharjee, Sudeep},
abstractNote = {A new non-invasive diagnostic system is developed for Microwave Induced Plasma (MIP) to reconstruct tomographic images of a 2D emission profile. A compact MIP system has wide application in industry as well as research application such as thrusters for space propulsion, high current ion beams, and creation of negative ions for heating of fusion plasma. Emission profile depends on two crucial parameters, namely, the electron temperature and density (over the entire spatial extent) of the plasma system. Emission tomography provides basic understanding of plasmas and it is very useful to monitor internal structure of plasma phenomena without disturbing its actual processes. This paper presents development of a compact, modular, and versatile Optical Emission Tomography (OET) tool for a cylindrical, magnetically confined MIP system. It has eight slit-hole cameras and each consisting of a complementary metal–oxide–semiconductor linear image sensor for light detection. The optical noise is reduced by using aspheric lens and interference band-pass filters in each camera. The entire cylindrical plasma can be scanned with automated sliding ring mechanism arranged in fan-beam data collection geometry. The design of the camera includes a unique possibility to incorporate different filters to get the particular wavelength light from the plasma. This OET system includes selected band-pass filters for particular argon emission 750 nm, 772 nm, and 811 nm lines and hydrogen emission H{sub α} (656 nm) and H{sub β} (486 nm) lines. Convolution back projection algorithm is used to obtain the tomographic images of plasma emission line. The paper mainly focuses on (a) design of OET system in detail and (b) study of emission profile for 750 nm argon emission lines to validate the system design.},
doi = {10.1063/1.4942768},
url = {https://www.osti.gov/biblio/22597079}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 3,
volume = 87,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2016},
month = {Tue Mar 15 00:00:00 EDT 2016}
}