Identification of halogen containing radicals in silicon etching plasmas and density measurement by UV broad band absorption spectroscopy

2004 ◽  
Vol 37 (14) ◽  
pp. 1954-1964 ◽  
Author(s):  
Martin Kogelschatz ◽  
Gilles Cunge ◽  
Nader Sadeghi
Keyword(s):  
Absorption Spectroscopy ◽  
Broad Band ◽  
Density Measurement ◽  
Silicon Etching ◽  
Band Absorption

scholarly journals Ablation-Dominated Arcs in CO2 Atmosphere - Part II: Molecule Emission and Absorption

2020 ◽  
Author(s):  
Ralf Methling ◽  
Nicolas Götte ◽  
Dirk Uhrlandt
Keyword(s):  
Absorption Spectroscopy ◽  
High Speed ◽  
Broad Band ◽  
Imaging Spectroscopy ◽  
Circuit Breaker ◽  
Visible Spectral Range ◽  
Nozzle Geometry ◽  
Ambient Conditions ◽  
Band Absorption ◽  
Current Zero

Molecule radiation can be used as a tool to study colder regions in switching arc plasmas like arc fringes in contact to walls and ranges around current zero (CZ). This is demonstrated in the present study for the first time for the case of ablation-dominated high–current arcs as key elements of self–blast circuit breakers. The arc in a model circuit breaker (MCB) in CO2 with and an arc in a long nozzle under ambient conditions with peak currents between 5 and 10 kA were studied by emission and absorption spectroscopy in the visible spectral range. The nozzle material was polytetrafluoroethylene (PTFE) in both cases. Imaging spectroscopy was carried out either with high-speed cameras or with intensified CCD cameras. A pulsed high-intensity Xe lamp was applied as background radiator for the broad-band absorption spectroscopy. Emission of Swan bands from carbon dimers was observed at the edge of nozzles only or across the whole nozzle radius with highest intensity in the arc center, depending on current and nozzle geometry. Furthermore, absorption of C2 Swan bands and CuF bands were found with the arc plasma serving as background radiator. After CZ, only CuF was detected in absorption experiments.

A Background Emission Correction System for Atomic Absorption Spectrometry

1981 ◽  
Vol 35 (2) ◽  
pp. 176-181 ◽  
Author(s):  
Frederic G. Dewalt ◽  
John R. Amend ◽  
Ray Woodriff
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Broad Band ◽  
Absorption Spectrometry ◽  
Broad Band Emission ◽  
Band Emission ◽  
Band Absorption ◽  
Correction System

A simple system which corrects for both broad band absorption and broad band emission in thermally atomized atomic absorption spectroscopy is presented in this article.

scholarly journals High sensitivity ultra-broad-band absorption spectroscopy of inductively coupled chlorine plasma

2016 ◽  
Vol 25 (3) ◽  
pp. 035019 ◽  
Author(s):  
Daniil Marinov ◽  
Mickaël Foucher ◽  
Ewen Campbell ◽  
Mark Brouard ◽  
Pascal Chabert ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Broad Band ◽  
High Sensitivity ◽  
Inductively Coupled ◽  
Band Absorption

scholarly journals Ablation-Dominated Arcs in CO2 Atmosphere—Part II: Molecule Emission and Absorption

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4720
Author(s):  
Ralf Methling ◽  
Nicolas Götte ◽  
Dirk Uhrlandt
Keyword(s):  
Absorption Spectroscopy ◽  
High Speed ◽  
Broad Band ◽  
Imaging Spectroscopy ◽  
Circuit Breaker ◽  
Visible Spectral Range ◽  
Nozzle Geometry ◽  
Ambient Conditions ◽  
Band Absorption ◽  
Current Zero

Molecule radiation can be used as a tool to study colder regions in switching arc plasmas like arc fringes in contact to walls and ranges around current zero (CZ). This is demonstrated in the present study for the first time for the case of ablation-dominated high-current arcs as key elements of self-blast circuit breakers. The arc in a model circuit breaker (MCB) in CO2 with and an arc in a long nozzle under ambient conditions with peak currents between 5 and 10 kA were studied by emission and absorption spectroscopy in the visible spectral range. The nozzle material was polytetrafluoroethylene (PTFE) in both cases. Imaging spectroscopy was carried out either with high-speed cameras or with intensified CCD cameras. A pulsed high-intensity Xe lamp was applied as a background radiator for the broad-band absorption spectroscopy. Emission of Swan bands from carbon dimers was observed at the edge of nozzles only or across the whole nozzle radius with highest intensity in the arc center, depending on current and nozzle geometry. Furthermore, absorption of C2 Swan bands and CuF bands were found with the arc plasma serving as background radiator. After CZ, only CuF was detected in absorption experiments.

scholarly journals TiO and VO broad band absorption features in the optical spectrum of the atmosphere of the hot-Jupiter HD 209458b

2008 ◽  
Vol 492 (2) ◽  
pp. 585-592 ◽  
Author(s):  
J.-M. Désert ◽  
A. Vidal-Madjar ◽  
A. Lecavelier des Etangs ◽  
D. Sing ◽  
D. Ehrenreich ◽  
...  
Keyword(s):  
Optical Spectrum ◽  
Broad Band ◽  
Band Absorption ◽  
Absorption Features ◽  
Hot Jupiter
Sign in / Sign up

Export Citation Format

Share Document