Study of growth kinetics and behaviour of particles in a helium-silane RF plasma using laser diagnostic methods

ABSTRACTNucleation and growth of GaN under Ga-rich conditions by molecular beam epitaxy using a nitrogen rf plasma source is shown to result in both a smoother GaN surface and a reduced inversion domain content. In addition, preliminary results of the dramatic effect of atomic hydrogen on growth kinetics for Ga-rich growth are presented.

Download Full-text

Progress Toward Combustible Dust Cloud Characterization Using Multiple Laser Diagnostic Methods

AIAA Scitech 2021 Forum ◽

10.2514/6.2021-1374 ◽

2021 ◽

Author(s):

Christian Schweizer ◽

Yejun Wang ◽

Chad V. Mashuga ◽

Waruna D. Kulatilaka

Keyword(s):

Dust Cloud ◽

Diagnostic Methods ◽

Laser Diagnostic

Download Full-text

Group combustion models and laser diagnostic methods in sprays: A review

Combustion and Flame ◽

10.1016/0010-2180(83)90093-7 ◽

1983 ◽

Vol 51 ◽

pp. 127-139 ◽

Cited By ~ 43

Author(s):

Norman Chigier

Keyword(s):

Diagnostic Methods ◽

Combustion Models ◽

Laser Diagnostic ◽

Group Combustion

Download Full-text

Imaging and Characterization of Plasma Plumes Produced During Laser Ablation of Zirconium Carbide

MRS Proceedings ◽

10.1557/proc-285-81 ◽

1992 ◽

Vol 285 ◽

Cited By ~ 1

Author(s):

Darryl P. Butt ◽

Paul J. Wantuck

Keyword(s):

Zirconium Carbide ◽

Ccd Camera ◽

Laser Induced Fluorescence ◽

Diagnostic Methods ◽

Total Emission ◽

Low Emission ◽

Laser Diagnostic ◽

Planar Laser ◽

Plasma Plumes

ABSTRACTLaser diagnostic methods are developed and used to characterize the behavior of laser ablated zirconium carbide (ZrC). Emission from zirconium atoms dominates the total emission of the plasma plumes, which are estimated to have excitation temperatures of 9000 to 12,000 K under the conditions studied. Emission from species such as C, C2, and C3 were absent from the spectra due to the inherently low emission intensities of these species compared with that of Zr. Using a CCD camera, images of the plasma plumes are obtained from the emission and through the use of planar laser induced fluorescence of zirconium atoms.

Download Full-text

Growth kinetics and doping of gallium nitride grown by rf-plasma assisted molecular beam epitaxy

10.33915/etd.1351 ◽

2001 ◽

Author(s):

Aaron Joseph Ptak

Keyword(s):

Gallium Nitride ◽

Molecular Beam Epitaxy ◽

Growth Kinetics ◽

Molecular Beam ◽

Rf Plasma

Download Full-text

Laser diagnostic methods - A summary

10.2514/6.1983-1683 ◽

1983 ◽

Cited By ~ 2

Author(s):

J. TROLINGER ◽

M. AZAZZY ◽

D. MODARRESS ◽

J. CRAIG

Keyword(s):

Diagnostic Methods ◽

Laser Diagnostic

Download Full-text

Flow Field and Structure of Swirl Stabilized Non-Premixed Natural Gas Flames at Elevated Pressure

Volume 1: Turbo Expo 2004 ◽

10.1115/gt2004-53340 ◽

2004 ◽

Cited By ~ 4

Author(s):

Bertram Janus ◽

Andreas Dreizler ◽

Johannes Janicka

Keyword(s):

Flow Field ◽

Gas Turbine ◽

Elevated Pressure ◽

Diagnostic Methods ◽

Computational Grids ◽

Flow Structures ◽

Gas Turbine Combustor ◽

Laser Diagnostic ◽

Recirculation Zones ◽

Inflow Conditions

This study reports on measurements in a generic non-premixed gas turbine combustor segment. Flow and scalar field were characterized using advanced laser diagnostic methods. The optically accessible burning chamber allowed for measurement of inflow conditions close-by the nozzle important for comparisons with numerical simulations. The generic nozzle design is sufficiently simplified to be precisely reproduced by block structured computational grids but shows typical features of gas turbine applications. To expose the influence of heat release on the flow field properties both isothermal and combusting conditions were investigated. Striking features of the present configuration are a detached flame, multiple recirculation zones, and complex coherent flow structures.

Download Full-text