9 Matching Results

Search Results

Results: 1 - 9
open access

Characterizing W-2 SLSF experiment temperature oscillations using computer graphics. [Sodium Loop Safety Facility]

Description: The W-2 SLSF (Sodium Loop Safety Facility) experiment was an instrumented in-reactor test performed to characterize the failure response of full-length, preconditioned LMFBR prototypic fuel pins to slow transient overpower (TOP) conditions. Although the test results were expected to confirm analytical predictions of upper level failure and fuel expulsion, an axial midplane failure was experienced. Extensive post-test analyses were conducted to understand all of the unexpected behavior in the ex… more
Date: June 23, 1983
Creator: Smith, D. E.
Partner: UNT Libraries Government Documents Department
open access

NOVANET: communications network for a control system

Description: NOVANET is a control system oriented fiber optic local area network that was designed to meet the unique and often conflicting requirements of the Nova laser control system which will begin operation in 1984. The computers and data acquisition devices that form the distributed control system for a large laser fusion research facility need reliable, high speed communications. Both control/status messages and experimental data must be handled. A subset of NOVANET is currently operating on the two… more
Date: May 23, 1983
Creator: Hill, J.R.; Severyn, J.R. & VanArsdall, P.J.
Partner: UNT Libraries Government Documents Department
open access

Optimized baffle and aperture placement in neutral beamlines

Description: Most neutral beamlines contain an iron-core ion-bending magnet that requires shielding between the end of the neutralizer and this magnet. This shielding allows the gas pressure to drop prior to the beam entering the magnet and therefore reduces beam losses in this drift region. We have found that the beam losses can be reduced even further by eliminating the iron-core magnet and the magnetic shielding altogether. The required bending field can be supplied by current coils without the iron pole… more
Date: November 23, 1983
Creator: Stone, R.; Duffy, T. & Vetrovec, J.
Partner: UNT Libraries Government Documents Department
open access

Transport in compact tori

Description: The parameter B/sub e//nr/sub p/ (here, B/sub e/ is applied magnetic field strength, nr/sub p/ is the plasma density-radius product) is proposed as a key parameter for spheromak heating studies. If B/sub e//nr/sub p/ is too large, increased magnetic fluctuations limit heating; low B/sub e//nr/sub p/ value results in excessive radiation losses. An optimum range appears to be B/sub e//nr/sub p/ approx. 1 to 5 x 10/sup -20/ Wb.
Date: February 23, 1983
Creator: Miley, G. H.
Partner: UNT Libraries Government Documents Department
open access

Organization and performance of the neutral beam system for the Tandem Mirror Experiment-Upgrade (TMX-U)

Description: The Tandem Mirror Experiment-Upgrade (TMX-U) at Lawrence Livermore National Laboratory (LLNL) uses 24 neutral-beam injectors to heat and fuel the experimental plasmas. This system is unique because TMX-U operates four times more injectors than any other fusion experiment. These injectors deliver an average of 50 A (accel) at 17 keV for 75 ms. Source conditioning time has been reduced to approximately four days for the entire system after extended machine air cycles. TMX-U is also unique because… more
Date: November 23, 1983
Creator: Kane, R. J.; Hibbs, S. M.; Kerr, R. G. & Poulsen, P.
Partner: UNT Libraries Government Documents Department
open access

Design of the plasma current sensor diagnostic for MFTF-B

Description: The Plasma Current Sensor (PCS) diagnostic includes large diamagnetic loops (DL) that fully encircle the plasma as well as small multi-turn pickup coils (PCs) located between the plasma and the superconducting magnets. Both types of sensors respond to changing magnetic flux linkages caused by plasma currents and are used to measure plasma diamagnetism, from which estimates of temperature and density can be made. The DLs are used in the central cell and Axicell regions, while the PCs are used in… more
Date: November 23, 1983
Creator: Goerz, D. A.; House, P. A. & Wells, C. W.
Partner: UNT Libraries Government Documents Department
open access

Noisy time-dependent spectra

Description: The definition of a time-dependent spectrum registered by an idealized spectrometer responding to a time-varying electromagnetic field as proposed by Eberly and Wodkiewicz and subsequently applied to the spectrum of laser-induced fluorescence by Eberly, Kunasz, and Wodkiewicz is here extended to allow a stochastically fluctuating (interruption model) environment: we provide an algorithm for numerical determination of the time-dependent fluorescence spectrum of an atom subject to excitation by a… more
Date: February 23, 1983
Creator: Shore, B. W. & Eberly, J. H.
Partner: UNT Libraries Government Documents Department
open access

Yield stress of Type 21-6-9 stainless steel over a wide range of strain rate (10/sup -5/ to 10/sup 4/ s/sup -1/) and temperature

Description: Hopkinson split-bar tests were performed on Type 21-6-9 austenitic stainless steel from ambient temperature to 1023 K. These high-strain-rate tests (10/sup 2/ to 10/sup 4/ s/sup -1/) were compared with lower-strain-rate tests (10/sup -4/ s/sup -1/). The results indicate that over this temperature range, the strain-rate sensitivity of 21-6-9 is not strongly dependent on the strain rate. This suggests that the mechanism(s) of plastic flow at the higher rates is similar to that at the lower rates.… more
Date: September 23, 1983
Creator: Kassner, M. E. & Breithaupt, R. D.
Partner: UNT Libraries Government Documents Department
open access

Trim coils and magnet alignment in MFTF-B

Description: Performance of the MFTF-B tandem mirror reactor is critically dependent upon precise alignment of the superconducting magnets in the transition region. Given the size and nature of these magnets, mechanical alignment under operating conditions to the tolerances required is an impossible task, as placement must anticipate deflections due to vacuum conditions, cooling to cryogenic temperatures, and magnetic forces. A cost-effective solution to the alignment problem is presented here. In each tran… more
Date: November 23, 1983
Creator: Yamaguchi, G. T. & Baldwin, D. E.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen