Experimental Results of a 2 GW Vircator

John J. Mankowski; Eun H. Choi; James C. Dickens; Xupeng Chen; Magne Kristiansen

Experimental Results of a 2 GW Vircator

John J. Mankowski, Eun H. Choi, James C. Dickens, Xupeng Chen, Magne Kristiansen

Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

Experimental findings on the coaxial virtual cathode oscillator (Vircator) at Texas Tech University are reported. Recent modifications to the system include extending the pulse forming line that now provides an applied diode voltage of 600 kV for 70 nanoseconds at 60 kA. Other modifications include diode voltage, current, and radiated field diagnostics. In this initial phase of experiments, copper reflectors were installed within the diode to provide a simple means of microwave feedback to assist in the E-beam modulation. Thus far we have observed microwave peak power output with feedback reflectors as high as 2 GW corresponding to an efficiency of ∼6%. The mode observed at these high efficiencies is almost entirely TE₁₁. At lower efficiencies, both TM₀₁ and TE₁₁ modes are observed. These results suggest mode competition at lower efficiencies.

Original language	English
Pages (from-to)	187
Number of pages	1
Journal	IEEE International Conference on Plasma Science
State	Published - 2003
Event	2003 IEEE International Conference on Plasma Science - Jeju, Korea, Republic of Duration: Jun 2 2003 → Jun 5 2003

Cite this

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title = "Experimental Results of a 2 GW Vircator",

abstract = "Experimental findings on the coaxial virtual cathode oscillator (Vircator) at Texas Tech University are reported. Recent modifications to the system include extending the pulse forming line that now provides an applied diode voltage of 600 kV for 70 nanoseconds at 60 kA. Other modifications include diode voltage, current, and radiated field diagnostics. In this initial phase of experiments, copper reflectors were installed within the diode to provide a simple means of microwave feedback to assist in the E-beam modulation. Thus far we have observed microwave peak power output with feedback reflectors as high as 2 GW corresponding to an efficiency of ∼6%. The mode observed at these high efficiencies is almost entirely TE11. At lower efficiencies, both TM01 and TE11 modes are observed. These results suggest mode competition at lower efficiencies.",

author = "Mankowski, {John J.} and Choi, {Eun H.} and Dickens, {James C.} and Xupeng Chen and Magne Kristiansen",

year = "2003",

language = "English",

pages = "187",

journal = "IEEE International Conference on Plasma Science",

issn = "0730-9244",

note = "null ; Conference date: 02-06-2003 Through 05-06-2003",

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TY - JOUR

T1 - Experimental Results of a 2 GW Vircator

AU - Mankowski, John J.

AU - Choi, Eun H.

AU - Dickens, James C.

AU - Chen, Xupeng

AU - Kristiansen, Magne

PY - 2003

Y1 - 2003

N2 - Experimental findings on the coaxial virtual cathode oscillator (Vircator) at Texas Tech University are reported. Recent modifications to the system include extending the pulse forming line that now provides an applied diode voltage of 600 kV for 70 nanoseconds at 60 kA. Other modifications include diode voltage, current, and radiated field diagnostics. In this initial phase of experiments, copper reflectors were installed within the diode to provide a simple means of microwave feedback to assist in the E-beam modulation. Thus far we have observed microwave peak power output with feedback reflectors as high as 2 GW corresponding to an efficiency of ∼6%. The mode observed at these high efficiencies is almost entirely TE11. At lower efficiencies, both TM01 and TE11 modes are observed. These results suggest mode competition at lower efficiencies.

AB - Experimental findings on the coaxial virtual cathode oscillator (Vircator) at Texas Tech University are reported. Recent modifications to the system include extending the pulse forming line that now provides an applied diode voltage of 600 kV for 70 nanoseconds at 60 kA. Other modifications include diode voltage, current, and radiated field diagnostics. In this initial phase of experiments, copper reflectors were installed within the diode to provide a simple means of microwave feedback to assist in the E-beam modulation. Thus far we have observed microwave peak power output with feedback reflectors as high as 2 GW corresponding to an efficiency of ∼6%. The mode observed at these high efficiencies is almost entirely TE11. At lower efficiencies, both TM01 and TE11 modes are observed. These results suggest mode competition at lower efficiencies.

UR - http://www.scopus.com/inward/record.url?scp=0141893995&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0141893995

SN - 0730-9244

SP - 187

JO - IEEE International Conference on Plasma Science

JF - IEEE International Conference on Plasma Science

Y2 - 2 June 2003 through 5 June 2003

ER -

Experimental Results of a 2 GW Vircator

Abstract

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