Comparison of optical emission and laser-induced fluorescence in arcjet thruster plumes used for diamond deposition

1995 ◽  
Author(s):  
Elizabeth Brinkman ◽  
Jay Jeffries
Keyword(s):  
Optical Emission ◽  
Laser Induced Fluorescence ◽  
Diamond Deposition

Observation of Atom and Ion Clouds Produced from Single Droplets of Sample in Inductively Coupled Plasmas by Optical Emission and Laser-Induced Fluorescence Imaging

1997 ◽  
Vol 51 (5) ◽  
pp. 607-616 ◽  
Author(s):  
John W. Olesik ◽  
Jeffery A. Kinzer ◽  
Garrett J. McGowan
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Laser Induced Fluorescence ◽  
Inductively Coupled Plasmas ◽  
Double Exposure ◽  
Charge Coupled Device ◽  
Inductively Coupled ◽  
Intensified Charge Coupled Device ◽  
Coupled Plasmas ◽  
Single Droplets

An instrument to obtain optical emission and laser-induced fluorescence images of atom or ion clouds, each produced from isolated, monodisperse droplets of sample in an inductively coupled plasma, is described. An excimer laser pumped dye laser is used to produce a large (28-mm × 24-mm) beam for saturated fluorescence from atoms or ions throughout a large portion of the ICP. An intensified charge-coupled device (ICCD) detects optical emission or laser induced fluorescence snapshot images at the focal plane of an aberration-corrected slitless spectrograph. Images produced from a single laser pulse can be detected. Double-exposure emission images with 1-μs gate times can be acquired to monitor the movement of atom or ion clouds produced from a single droplet of sample solution. Variations in the number of atoms or ions produced as a function of time (or height) in the plasma can be monitored. Excitation in the plasma can be assessed from ratios of emission to fluorescence intensities.

Studies of Plasma O Atom Concentration by Two-Photon Laser Induced Fluorescence and Optical Emission Spectroscopy

1984 ◽  
Vol 38 ◽  
Author(s):  
R. Walkup ◽  
K. Saenger ◽  
G. S. Selwyn
Keyword(s):  
Optical Emission ◽  
Quantitative Relationship ◽  
Laser Induced Fluorescence ◽  
Plasma Parameters ◽  
Atom Concentration ◽  
Rf Plasmas ◽  
Excited Atoms ◽  
Two Photon ◽  
Spatially Resolved ◽  
Quantitative Measurements

AbstractWe report quantitative measurements of the concentration of atomic oxygen in RF plasmas determined by two-photon laser induced fluorescence. The results are compared with concurrent measurements of spatially resolved plasma induced optical emission. These measurements establish: (1) the O atom concentration as a function of plasma parameters, (2) a semi-quantitative relationship between O* emission intensity normalized by Ar* in-tensity and O atom concentration, and (3) an understanding of the mechanisms for pro-duction of excited atoms in the plasma.

Optical emission diagnostics of permanent and pulsed microwave discharges in H2–CH4–N2 for diamond deposition

1999 ◽  
Vol 116-119 ◽  
pp. 1233-1237 ◽  
Author(s):  
Hassan Chatei ◽  
Jamal Bougdira ◽  
Michel Remy ◽  
Patrick Alnot
Keyword(s):  
Optical Emission ◽  
Diamond Deposition ◽  
Microwave Discharges
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