Experimental studies of high power plasma filled backward wave oscillators

Y. Carmel; W. R. Lou; W. W. Destler; V. L. Granatstein; J. Rodgers; R. A. Kehs; K. Minami

doi:10.1109/plasma.1990.110657

Experimental studies of high power plasma filled backward wave oscillators

Y. Carmel, W. R. Lou, W. W. Destler, V. L. Granatstein, J. Rodgers, R. A. Kehs, K. Minami

Research output: Contribution to conference › Paper › peer-review

Abstract

Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation at high efficiency (about 40%). An experimental study of an 8.4-GHz BWO filled with an externally controlled background plasma was performed. It was found that the enhanced efficiency can be maintained even for large electron beam currents approaching the vacuum space-charge limiting current, and it is anticipated that this might hold even beyond the space-charge limiting current. A small frequency up-shift (a few percent) was detected for the plasma loaded BWO. A hydrogen flashover plasma gun was used, and its characteristics, including plasma density, drift velocity, and temperature, were investigated. Detailed studies of beam propagation in vacuum as well as in plasma loaded structures were performed. It appears that a slightly over-moded device will be needed for peak power handling capability of 5-10 GW.

Original language	English
Pages	140
Number of pages	1
DOIs	https://doi.org/10.1109/plasma.1990.110657
State	Published - 1 Jan 1990
Externally published	Yes
Event	1990 IEEE International Conference on Plasma Science - Oakland, CA, USA Duration: 21 May 1990 → 23 May 1990

Conference

Conference	1990 IEEE International Conference on Plasma Science
City	Oakland, CA, USA
Period	21/05/90 → 23/05/90

ASJC Scopus subject areas

General Engineering

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10.1109/plasma.1990.110657

Cite this

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title = "Experimental studies of high power plasma filled backward wave oscillators",

abstract = "Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation at high efficiency (about 40%). An experimental study of an 8.4-GHz BWO filled with an externally controlled background plasma was performed. It was found that the enhanced efficiency can be maintained even for large electron beam currents approaching the vacuum space-charge limiting current, and it is anticipated that this might hold even beyond the space-charge limiting current. A small frequency up-shift (a few percent) was detected for the plasma loaded BWO. A hydrogen flashover plasma gun was used, and its characteristics, including plasma density, drift velocity, and temperature, were investigated. Detailed studies of beam propagation in vacuum as well as in plasma loaded structures were performed. It appears that a slightly over-moded device will be needed for peak power handling capability of 5-10 GW.",

author = "Y. Carmel and Lou, {W. R.} and Destler, {W. W.} and Granatstein, {V. L.} and J. Rodgers and Kehs, {R. A.} and K. Minami",

year = "1990",

month = jan,

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doi = "10.1109/plasma.1990.110657",

language = "English",

pages = "140",

note = "1990 IEEE International Conference on Plasma Science ; Conference date: 21-05-1990 Through 23-05-1990",

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AU - Carmel, Y.

AU - Lou, W. R.

AU - Destler, W. W.

AU - Granatstein, V. L.

AU - Rodgers, J.

AU - Kehs, R. A.

AU - Minami, K.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation at high efficiency (about 40%). An experimental study of an 8.4-GHz BWO filled with an externally controlled background plasma was performed. It was found that the enhanced efficiency can be maintained even for large electron beam currents approaching the vacuum space-charge limiting current, and it is anticipated that this might hold even beyond the space-charge limiting current. A small frequency up-shift (a few percent) was detected for the plasma loaded BWO. A hydrogen flashover plasma gun was used, and its characteristics, including plasma density, drift velocity, and temperature, were investigated. Detailed studies of beam propagation in vacuum as well as in plasma loaded structures were performed. It appears that a slightly over-moded device will be needed for peak power handling capability of 5-10 GW.

AB - Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation at high efficiency (about 40%). An experimental study of an 8.4-GHz BWO filled with an externally controlled background plasma was performed. It was found that the enhanced efficiency can be maintained even for large electron beam currents approaching the vacuum space-charge limiting current, and it is anticipated that this might hold even beyond the space-charge limiting current. A small frequency up-shift (a few percent) was detected for the plasma loaded BWO. A hydrogen flashover plasma gun was used, and its characteristics, including plasma density, drift velocity, and temperature, were investigated. Detailed studies of beam propagation in vacuum as well as in plasma loaded structures were performed. It appears that a slightly over-moded device will be needed for peak power handling capability of 5-10 GW.

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T2 - 1990 IEEE International Conference on Plasma Science

Y2 - 21 May 1990 through 23 May 1990

ER -

Experimental studies of high power plasma filled backward wave oscillators

Abstract

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