| Experimental and Theoretical Research on Advanced Vacuum Electronic Microwave Devices |
29 SEP 95 |
121 pages |
| Authors:
W. W. Destler; MARYLAND UNIV COLLEGE PARK
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 | This report summarizes the work done on the task titled "Harmonic Gyrotron Oscillators and Amplifiers", Covering the period from September 30, 1994 to September 29,1995. During the past year we have completed the test experiment of phase locking a 35 GHz second harmonic gyrotron oscillator using a quasi-optical circulator to separate injection and output signal. The experiment well demonstrated the capabilities of the hot test equipment in the harmonic gyrotron ... |
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| Experimental and Theoretical Studies of High Power Plasma Filled Backward Wave Oscillators |
FEB 91 |
83 pages |
| Authors:
T. M. Antonsen Jr.; Y. Carmel; W. W. Destler; V. L. Granatstein; B. Levush; MARYLAND UNIV COLLEGE PARK LAB FOR PLASMA RESEARCH
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| The purpose of the research covered during this period was to study the behavior of a plasma loaded BWO when driven by large beam current approaching the vacuum space charge limiting value inside the device. The main results are: (1) The plasma indeed allows injection of large current into the BWO. Currents as high as 75% of the vacuum space charge limit were successfully propagated. (2) In plasma loaded BWO, ... |
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| Propagation of Intense Charged Particle Beams into Vacuum |
31 MAR 85 |
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| Authors:
W. W. Destler; M. P. Reiser; M. J. Rhee; C. D. Striffler; MARYLAND UNIV COLLEGE PARK DIV OF MATHEMATICAL AND PHYSICAL SCIENCES AND ENGINEERING
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 | During the past year the experimental facilities have been augmented by the construction of a large diameter (60cm) vacuum chamber with and array of radial current collectors to support detailed studies of beam propagation characteristics, and a new pulsed magnetic field coil (surplus) from the Autoresonant Acceleratoar project. This new coil provides much more uniform fields over a longer axial length than did the previous coils. In addition, a Department ... |
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| Experimental and Theoretical Investigation of Microwave and Millimeter Wave Radiation from Hollow, Rotating Electron Beams |
30 DEC 84 |
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| Authors:
W. W. Destler; MARYLAND UNIV COLLEGE PARK
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| Studies of the production of microwave and millimeter wave radiation from rotating electron beams have been pursued at the University of Maryland under AFOSR sponsorship since 1978. In the period 1978-1981, these studies centered the braodband radiation produced when a rotating electron beam interacts with the TE and/or TM modes of a smooth cylindrical conducting boundary system. These early studies led in 1981 to the first demonstration of a new ... |
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| PLASMA WIND TUNNEL EXPERIMENT. |
OCT 1969 |
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| Authors:
W. W. Destler; D. L. Morse; CORNELL UNIV ITHACA N Y LAB OF PLASMA STUDIES
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| A plasma wind tunnel facility, similar to that described by Pugh and Patrick, is used to produce a super-Alfvenic flow of plasma over a magnetic obstacle for times approaching one millisecond. The flowing plasma has a density greater than 2 x 10 to the 13th power/cc on axis, and the density has decreased to one-half the peak value at a radius greater than 25 cm. The magnetic field embedded in ... |
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