The stabilization and spectroscopic study of microwave generated resonant cavity plasmas

Philip Balaam, Michael Matthew Micci

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

Efficiency measurements of a free-floating resonant cavity plasma system are presented. Temperature measurements 200 mm downstream of the plasma indicate that both the thermal and total efficiencies increase linearly with mass flow rate. Thermal efficiencies of 36.6% and total efficiencies of 25.2% have been measured at the maximum mass flow rate of the experimental system. Bluff-body and swirling flows have been investigated as a means of locating the plasma in a stable, axial position during operation at higher powers, where a positional instability has been observed. Preliminary results indicate that bluff-body stabilization is a promising scheme for microwave plasmas. A high spectral resolution spectroscopic system is presented, which will allow measurement of both plasma temperature and gas exhaust velocity without the assumption of local thermodynamic equilibrium or the need for intensity or wavelength calibration.

Original languageEnglish (US)
StatePublished - Jan 1 1990
EventAlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990 - Orlando, United States
Duration: Jul 18 1990Jul 20 1990

Other

OtherAlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990
CountryUnited States
CityOrlando
Period7/18/907/20/90

Fingerprint

Cavity resonators
Stabilization
Microwaves
Plasmas
Flow rate
Swirling flow
Spectral resolution
Exhaust gases
Temperature measurement
Thermodynamics
Calibration
Wavelength
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Balaam, P., & Micci, M. M. (1990). The stabilization and spectroscopic study of microwave generated resonant cavity plasmas. Paper presented at AlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990, Orlando, United States.
Balaam, Philip ; Micci, Michael Matthew. / The stabilization and spectroscopic study of microwave generated resonant cavity plasmas. Paper presented at AlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990, Orlando, United States.
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Balaam, P & Micci, MM 1990, 'The stabilization and spectroscopic study of microwave generated resonant cavity plasmas' Paper presented at AlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990, Orlando, United States, 7/18/90 - 7/20/90, .

The stabilization and spectroscopic study of microwave generated resonant cavity plasmas. / Balaam, Philip; Micci, Michael Matthew.

1990. Paper presented at AlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990, Orlando, United States.

Research output: Contribution to conferencePaper

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T1 - The stabilization and spectroscopic study of microwave generated resonant cavity plasmas

AU - Balaam, Philip

AU - Micci, Michael Matthew

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Efficiency measurements of a free-floating resonant cavity plasma system are presented. Temperature measurements 200 mm downstream of the plasma indicate that both the thermal and total efficiencies increase linearly with mass flow rate. Thermal efficiencies of 36.6% and total efficiencies of 25.2% have been measured at the maximum mass flow rate of the experimental system. Bluff-body and swirling flows have been investigated as a means of locating the plasma in a stable, axial position during operation at higher powers, where a positional instability has been observed. Preliminary results indicate that bluff-body stabilization is a promising scheme for microwave plasmas. A high spectral resolution spectroscopic system is presented, which will allow measurement of both plasma temperature and gas exhaust velocity without the assumption of local thermodynamic equilibrium or the need for intensity or wavelength calibration.

AB - Efficiency measurements of a free-floating resonant cavity plasma system are presented. Temperature measurements 200 mm downstream of the plasma indicate that both the thermal and total efficiencies increase linearly with mass flow rate. Thermal efficiencies of 36.6% and total efficiencies of 25.2% have been measured at the maximum mass flow rate of the experimental system. Bluff-body and swirling flows have been investigated as a means of locating the plasma in a stable, axial position during operation at higher powers, where a positional instability has been observed. Preliminary results indicate that bluff-body stabilization is a promising scheme for microwave plasmas. A high spectral resolution spectroscopic system is presented, which will allow measurement of both plasma temperature and gas exhaust velocity without the assumption of local thermodynamic equilibrium or the need for intensity or wavelength calibration.

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Balaam P, Micci MM. The stabilization and spectroscopic study of microwave generated resonant cavity plasmas. 1990. Paper presented at AlAA/DGLR/JSASS 21st International Electric Propulsion Conference, 1990, Orlando, United States.