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Applications of small computers for systems control on the Tandem Mirror Experiment-Upgrade

Description: Desktop computers operating into a CAMAC-based interface are used to control and monitor the operation of the various subsystems on the Tandem Mirror Experiment-Upgrade (TMX-U) at Lawrence Livermore National Laboratory (LLNL). These systems include: shot sequencer/master timing, neutral beam control (four consoles), magnet power system control, ion-cyclotron resonant heating (ICRH) control, thermocouple monitoring, getter system control, gas fueling system control, and electron-cyclotron resona… more
Date: November 29, 1983
Creator: Bork, R. G.; Kane, R. J. & Moore, T. L.
Partner: UNT Libraries Government Documents Department
open access

Ion microstability in tandem mirrors

Description: The formalism describing ion-cyclotron modes in mirror traps will be developed. Emphasis will be placed on the effects of finite axial boundaries on the normal modes of the system. Wave properties are a composite picture of: positive energy waves (plasma oscillation, shear Alfven and drift waves), negative energy waves (ion Bernstein waves in a loss-cone media), positive dissipation (electron Landau damping, outgoing waves), and negative dissipation (ion cyclotron damping in a loss-cone and ani… more
Date: August 29, 1983
Creator: Pearlstein, L.D.
Partner: UNT Libraries Government Documents Department
open access

Mirror research: status and prospects

Description: The tandem mirror program has evolved considerably in the last decade. Of significance is the viable reactor concept embodied in the MARS design. An aggressive experimental program culminating in the operation of MFTF-B in late 1986, will provide a firm basis for refining the MARS design as necessary for constructing a reactor prototype in the 1990s.
Date: November 29, 1983
Creator: Baldwin, D.E.
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional equilibrium in quadrupole symmetric tandem mirrors in the paraxial limit (reduced MHD)

Description: Equilibrium in quadrupole symmetric mirrors is fully three dimensional; however, because axial scale lengths are long compared with radial scale lengths (equivalently weak curvature) it is possible to reduce the complexity of the equations by expanding in the appropriate smallness parameter. Such a procedure leads to set of reduced MHD equations. The general theory will be presented, numerical results discussed, modifications due to finite Larmor radius will be added, and an analytic solution f… more
Date: August 29, 1983
Creator: Pearlstein, L.D.
Partner: UNT Libraries Government Documents Department
open access

Thermal barriers: their purpose and functioning

Description: This review covers the following topics: (1) thermal barrier formation, (2) ion pumping, (3) high-field throttle coil, and (4) microstability. (MOW)
Date: August 29, 1983
Creator: Baldwin, D.E.
Partner: UNT Libraries Government Documents Department
open access

Electromagnetic direct implicit PIC simulation

Description: Interesting modelling of intense electron flow has been done with implicit particle-in-cell simulation codes. In this report, the direct implicit PIC simulation approach is applied to simulations that include full electromagnetic fields. The resulting algorithm offers advantages relative to moment implicit electromagnetic algorithms and may help in our quest for robust and simpler implicit codes.
Date: March 29, 1983
Creator: Langdon, A. Bruce
Partner: UNT Libraries Government Documents Department
open access

Fusion-power demonstration. [Next step beyond MFTF-B]

Description: As a satellite to the MARS (Mirror Advanced Reactor Study) a smaller, near-term device has been scoped, called the FPD (Fusion Power Demonstration). Envisioned as the next logical step toward a power reactor, it would advance the mirror fusion program beyond MFTF-B and provide an intermediate step toward commercial fusion power. Breakeven net electric power capability would be the goal such that no net utility power would be required to sustain the operation. A phased implementation is envision… more
Date: March 29, 1983
Creator: Henning, C. D.; Logan, B. G.; Carlson, G. A.; Neef, W. S.; Moir, R. W.; Campbell, R. B. et al.
Partner: UNT Libraries Government Documents Department
open access

New kind of user interface for controlling MFTF diagnostics

Description: The Mirror Fusion Test Facility (MFTF) at Lawrence Livermore National Laboratory is faced with the problem of controlling a multitude of plasma diagnostics instruments from a central, multiprocessor computer facility. A 16-bit microprocessor-based workstation allows each physicist entree into the central multiprocessor, which consists of nine Perkin-Elmer 32-bit minicomputers. The workstation provides the user interface to the larger system, with display graphics, windowing, and a physics noteb… more
Date: November 29, 1983
Creator: Preckshot, George G.; Saroyan, Ralph A. & Mead, John E.
Partner: UNT Libraries Government Documents Department
open access

Design lessons from using programmable controllers in the MFTF-B personnel safety and interlocks system

Description: Applying programmable controllers in critical applications such as personnel safety and interlocks systems requires special considerations in the design of both hardware and software. All modern programmable controller systems feature extensive internal diagnostic capabilities to protect against problems such as program memory errors; however most, if not all present designs lack an intrinsic capability for detecting and countering failures on the field-side of their I/O modules. Many of the mo… more
Date: November 29, 1983
Creator: Branum, James D.
Partner: UNT Libraries Government Documents Department
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