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in creator/contributor: "Antonsen, T. M., Jr."  
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Millimeter wave free electron laser amplifiers: Experiments and designs

Description: Free electron laser amplifies are investigated as sources of high- average-power (1 MW) millimeter to submillimeter wave radiation (200 GHz - 600 GHz) for application to electron cyclotron resonance heating of magnetically confined fusion plasmas. As a stepping-stone to higher frequencies and cw operation a pulsed amplifier ({tau}{sub pulse} {approx equal} 80 ns) at 98 GHz is being developed. Status is reported on this experiment which investigates linear gain amplification with use of sheet el… more
Date: January 1, 1991
Creator: Bidwell, S. W.; Zhang, Z. X.; Antonsen, T. M., Jr.; Bensen, D. M.; Destler, W. W.; Granatstein, V. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nonlinear dynamics and plasma transport

Description: In this paper we summarize the progress made over the last year in three different areas of research: (a) shear flow generation and reduced transport in fluids and plasma, (b) nonlinear dynamics and visualization of 3D flows, and (c) application of wavelet analysis to the study of fractal dimensions in experimental and numerical data.
Date: January 1, 1992
Creator: Antonsen, T. M., Jr.; Drake, J. F.; Finn, J. M.; Guzdar, P. N.; Hassam, A. B. & Sagdeev, R. Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Maryland controlled fusion research program. Progress report, November 1, 1992--October 31, 1993

Description: In recent years, members of the Maryland Plasma Theory Group have made significant contributions to the national fusion theory program, and, in many cases, these theoretical developments helped to interpret experimental results and to design new experimental programs. In this paper, we summarize the technical progress in four major areas of tokamak research: (a) L/H transition and edge turbulence and transport; (b) active control of micro-turbulence and transport; (c) major disruptions; and (d)… more
Date: May 1, 1993
Creator: Antonsen, T. M., Jr.; Drake, J. F.; Finn, J. M.; Guzdar, P.; Hassam, A.; Liu, C. S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microwave generation for magnetic fusion energy applications. Task A, Free electron lasers with small period wigglers; Task B, Theory and modeling of high frequency, high power gyrotron operation: Progress report, May 1, 1993--May 1, 1994

Description: This task involves the feasibility of high-power pulsed, high- efficiency, millimeter-wave free electron lasers (FEL) for ecr of thermonuclear plasmas. The research undertaken is to develop high average power FEL at voltage below IMV allowing for smaller and less costly power supplies. Linear amplification experiments employing a No. 56 period untapered wiggler have been conducted, and substantial small signal gain was observed at 95 GHz over a wide range of experimental conditions consistent w… more
Date: May 1, 1994
Creator: Antonsen, T. M., Jr.; Destler, W. W.; Granatstein, V. & Levush, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microwave generation for magnetic fusion energy applications. Progress report, July 15, 1992--July 14, 1993

Description: This work strives to develop high average power FELs at voltages below I MV allowing for smaller and less costly power supplies. To achieve operation of an FEL with 100 GHZ {approx_lt} f {approx_lt} 150 GHz and with relatively modest voltage, we have been investigating the use of small period ({lambda}{sub {omega}} {approximately} 1 cm) planar wiggler magnets together with sheet electron beams. The sheet beam geometry allows for an FEL interaction region in the form of a narrow slit with high w… more
Date: February 1, 1993
Creator: Antonsen, T. M., Jr.; Destler, W. W.; Granatstein, V. L. & Levush, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microwave generation for magnetic fusion energy applications. Progress report, September 15, 1991--July 15, 1992

Description: This progress report encompasses work on two separate projects, both related to developing sources for electron cyclotron resonance heating of magnetic fusion plasmas. The report is therefore divided into two parts as follows: Free electron laser with small period wigglers; and theory and modeling of high frequency, high power gryotron operation. Task A is experimental and eventually aims at developing continuously tunable, cw sources for ECRH with power per unit as high as 5 megawatts. Task B … more
Date: January 1, 1992
Creator: Antonsen, T. M., Jr.; Destler, W. W.; Granatstein, V. L. & Levush, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Maryland Controlled Fusion Research Program. Progress report, November 1, 1993--October 31, 1994

Description: The theoretical research activity at the University of Maryland supported by the Department of Energy focusses on two major tasks. They are: A. Transport, generation of shear flow and L-H transitions in Tokamaks; and B. MHD stability of Tokamaks. Titles of specific research projects under these fields carried out in this period include: Poloidal rotation of tokamak plasmas at super-poloidal-sonic speeds; Rotation of plasmas in neoclassical regimes; New unstable branch of drift resistive balloon… more
Date: July 1994
Creator: Antonsen, T. M., Jr.; Drake, J. F.; Finn, J. M.; Guzdar, P. N.; Hassam, A.; Liu, C. S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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