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Fueling by coaxial plasma guns

Description: A review of the operational characteristics of ''snowplow'' and ''deflagration'' coaxial plasma guns is given. The injection of these plasmas into containment fields is discussed. The effect of a background plasma on low-beta injection is mentioned. The use of high-beta injection for reactor plasmas is described. (MOW)
Date: January 1, 1977
Creator: Marshall, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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LASL fast liner experiment

Description: The LASL Fast Liner Experiment explores a fusion concept in which a prepared plasma is adiabatically compressed to thermonuclear temperatures and densities by a rapidly imploding solid metal liner. A prepared plasma having ..beta.. > 1 is in contact with the liner and end plugs, and contains an embedded magnetic field to inhibit thermal conduction. Cylindrical liners are magnetically imploded by a large axial current carried in the liner shell. Theoretical estimates indicate an implosion veloci… more
Date: January 1, 1980
Creator: Sherwood, A. R.; Cantrell, E. L.; Henins, I.; Hoida, H. W.; Jarboe, T. R.; Malone, R. C. et al.
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Partner: UNT Libraries Government Documents Department
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Results from the Los Alamos Fast Liner Experiment

Description: Experimental results for aluminum liners imploded magnetically were obtained using a 1.75 MJ portion of the Scyllac capacitor bank at Los Alamos. Typical liner dimensions are 10-cm length, 5-cm diameter, and 1-mm initial thickness; because they are thick, these liners remain near solid density throughout the implosion. Implosion velocities of 4 to 6 x 10/sup 5/ cm/s have been consistently attained. These results agree well with theoretical calculations, which will also be presented. Results obt… more
Date: January 1, 1979
Creator: Sherwood, A. R.; Cantrell, E. L.; Ekdahl, C. A.; Henins, I.; Hoida, H. W.; Jarboe, T. R. et al.
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Partner: UNT Libraries Government Documents Department
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Target dynamics and thermonuclear burn, Part I

Description: The interaction between projectiles and targets in an impact fusion reactor system is considered. Heating by plane shock waves in DT is discussed. The condition for ignition is estimated and it is concluded that simple one-dimensional shock heating is unsuitable for fusion power production. It is suggested that shock heating followed by further compession would be an improvement.
Date: January 1, 1979
Creator: Marshall, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kaliski's explosive driven fusion experiments

Description: An experiment performed by a group in Poland on the production of DD fusion neutrons by purely explosive means is discussed. A method for multiplying shock velocities ordinarily available from high explosives by a factor of ten is described, and its application to DD fusion experiments is discussed.
Date: January 1, 1979
Creator: Marshall, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compact toroids generated by a magnetized coaxial source in the CTX experiment

Description: Compact toroids containing both toroidal and poloidal magnetic field (Spheromak-type) have been generated in CTX using a magnetized coaxial plasma gun. These CTs tear loose from the gun by magnetic field line reconnection, and they are trapped in flux conservers having various geometries. In a straight cylindrical flux conserver the CTs are observed to be unstable to a gross tilting mode. Stability to the tilting mode has been demonstrated in flux conservers having an oblate trapping region; ho… more
Date: January 1, 1981
Creator: Sherwood, A. R.; Henins, I.; Hoida, H. W.; Jarboe, T. R.; McKenna, K. F.; Linford, R. K. et al.
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Partner: UNT Libraries Government Documents Department
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Superconducting cavity tuner performance at CEBAF

Description: At the Continuous Electron Beam Accelerator Facility (CEBAF), a 4 GeV, multipass CW electron beam is to be accelerated by 338 SRF, 5-cell niobium cavities operating at a resonant frequency of 1497 MHz. Eight cavities arranged as four pairs comprise a cyromodule, a croygenically isolated linac subdivision. The frequency is controlled by a mechanical tune attached to the first and fifth cell of the cavity which elastically deforms the cavity and thereby alters its resonant frequency. The tuner is… more
Date: June 1, 1993
Creator: Marshall, J.; Preble, J. & Schneider, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fast liner proposal. [Magnetic implosions of cylindrical liners]

Description: This is a proposal to study, both theoretically and experimentally, the possibility of making a fusion reactor by magnetically imploding a cylindrical metallic shell on a prepared plasma. The approach is characterized by the following features: (1) the nonrotating liner would be driven by an axial current, (2) the plasma would also carry an axial current that provides an azimuthal magnetic field for thermal insulation in both the radial and longitudinal directions, (3) solid end plugs would be … more
Date: August 1, 1977
Creator: Sherwood, A. R.; Freeman, B. L.; Gerwin, R. A.; Jarboe, T. R.; Krakowski, R. A.; Malone, R. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Operating standards: Study of start up, physics measurements

Description: As a starting point for planning the physics measurements to be made during the start up of the pile, this memorandum describes a procedure for each of three cases, a large poisoned pile, running at power with a small unpoisoned pile but marking physics measurements with the large pile before going to power, and a similar case except that the physics measurements on the large pile are done after running with power on the small pile This memorandum should by no means be taken as a final proposal… more
Date: April 13, 1944
Creator: Marshall, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-voltage technology for the LASL implosion-heating experiment

Description: The implosion-heating power supply uses four 125-kV generators in series. Each generator consists of a fast 125-kV pulse-forming network made up of capacitors attached to a 1m-wide parallel-plate transmission line which is fed through multiple cables from a 2.5- mu F, 0.5- mu H Marx bank charged to 180 kV. To simplify construction it was decided to do without oil or water for high- voltage insulation and grading. The developments described here are: (1) a low- inductance connection between the … more
Date: January 1, 1973
Creator: Hammel, J. E.; Henins, I.; Marshall, J. & Sherwood, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design of a high-voltage generator for the LASL implosion-heating experiment

Description: The goals of the LASL implosion-heating experiment are to learn more about the physical processes involved in the initial implosion of a theta pinch and to find ways of euhancing the amount of implosion heating. The design parameters chosen for the experiment are: an initial plasma density of 10/sup 15/ deuterons per cm/sup 3/, a 40-cm-diameter discharge tube, a coil length of one meter, an initial electric field of 2 kV/cm applied to the inside of the discharge tube, and a magnetic field of l0… more
Date: January 1, 1973
Creator: Hammel, J. E.; Henins, I.; Marshall, J. & Sherwood, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spectroscopic studies of impurity control in coaxial sources for spheromaks at Los Alamos

Description: Spectroscopic measurements have been made of impurity radiation from coaxial sources used to produce spheromaks at Los Alamos. Some of these measurements were viewing the interelectrode region of the source. They show Doppler shifts implying impurity transport for low-Z impurities but not for metallic impurities. In others the relative emission of various lines from the spheromak in the VUV, quartz UV, and optical spectral regions are compared for various source operating parameters. Evidence f… more
Date: January 1, 1982
Creator: Hoida, H. W.; Barnes, C. W.; Henins, I.; Jarboe, T. R.; Knox, S. O.; Marshall, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Properties of spheromaks generated by a magnetized coaxial source

Description: In gun-generated spheromaks impurity contamination plays an important role in determining the energy loss. Metallic impurities can be reduced by an appropriate change of source parameters. The reduction of the level of metal impurities results in a spectrum showing a preponderance of oxygen and carbon lines and OIV radiation is observed to increase indicating a warmer plasma. However, the plasma lifetime is not changed. Discharge cleaning techniques appear to be necessary. It is still possible … more
Date: January 1, 1981
Creator: Hoida, H. W.; Henins, I.; Jarboe, T. R.; Linford, R. K.; Lipson, J.; Marshall, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CEBAF Cryomodule Commissioning in the South Linac

Description: When complete, the Continuous Electron Beam Accelerator Facility will house a 4 GeV recirculating linear accelerator containing 42 1/4 cryomodules arrayed in two antiparallel linacs and an injector. Currently, 38 1/4 cryomodules have been installed. Each cryomodule contains eight superconducting niobium 5-cell rf cavities that operate at 1.497 GHz [1]. A cryomodule must provide an energy gain of 20 MeV to the 200 mu-A beam [2]. The resultant dynamic heat load must be less than 45 W. The cavity … more
Date: October 1, 1993
Creator: Drury, M.; Lankford, H.; Lee, T.; Marshall, J.; Preble, J.; Saulter, Q. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tecolote: An object-oriented framework for physics development

Description: The authors describe a C++ physics development environment, called the Tecolote Framework, which allows model developers to work more efficiently and accurately. This Framework contains a variety of meshes, operators, and parallel fields, as well as an input/output (I/O) subsystem and graphics capabilities. Model developers can inherit Tecolote`s generic model interface and use the Framework`s high-level field and operator components to write parallel physics equations. New Tecolote models are … more
Date: December 31, 1998
Creator: Marshall, J.; Ankeny, L. & Clancy, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Commissioning of the CEBAF Cryomodules

Description: When complete, the Continuous Electron Beam Accelerator Facility will house a 4 GeV recirculating linear accelerator containing 42 1/4 cryomodules arrayed in two antiparallel linacs and an injector. Currently, over half of the cryomodules have been installed. Each cryomodule contains eight superconducting niobium 5-cell rf cavities that operate at 1.497 GHz [1]. A cryomodule must provide an energy gain of 20 MeV to the 200 mu-A beam [2]. The resultant dynamic heat load must be less than 45 W. T… more
Date: May 1, 1993
Creator: Drury, M.; Lee, T.; Marshall, J.; Preble, J.; Saulter, Q.; Schneider, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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