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in creator/contributor: "McLean, H. S."  
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Spheromak Energy Transport Studies via Neutral Beam Injection

Description: Results from the SSPX spheromak experiment provide strong motivation to add neutral beam injection (NBI) heating. Such auxiliary heating would significantly advance the capability to study the physics of energy transport and pressure limits for the spheromak. This LDRD project develops the physics basis for using NBI to heat spheromak plasmas in SSPX. The work encompasses three activities: (1) numerical simulation to make quantitative predictions of the effect of adding beams to SSPX, (2) using… more
Date: February 11, 2008
Creator: McLean, H. S.; Hill, D. N.; Wood, R. D.; Jayakumar, J. & Pearlstein, L. D.
Partner: UNT Libraries Government Documents Department
open access

Time-resolved Temperature Measurements in SSPX

Description: We seek to measure time-resolved electron temperatures in the SSPX plasma using soft X-rays from free-free Bremsstrahlung radiation. To increase sensitivity to changes in temperature over the range 100-300 eV, we use two photodiode detectors sensitive to different soft X-ray energies. The detectors, one with a Zr/C coating and the other with a Ti/Pd coating, view the plasma along a common line of sight tangential to the magnetic axis of the spheromak, where the electron temperature is a maximum… more
Date: August 14, 2006
Creator: Ludington, A. R.; Hill, D. N.; McLean, H. S.; Moller, J. & Wood, R. D.
Partner: UNT Libraries Government Documents Department
open access

Final Report - Effect of Magnetic Configuration on Spheromak Performances, FY2000 - FY2001, Tracking No.00-SI-008

Description: This is the final report on LDRD SI-funded research to determine the Effect of Magnetic Field Configurations on Spheromak Performance for the years FY2000-FY2001, during which a new set of bias magnetic field coils was used to change the vacuum magnetic field configuration of the SSPX spheromak at LLNL. The USDOE Office of Fusion Energy Science funded the routine operation of the SSPX facility during FY00 and FY01. A photo of the SSPX facility as it appeared in mid-FY01, appears in this report.… more
Date: February 6, 2002
Creator: Hill, D. N.; Hooper, E. B.; McLean, H. S.; Stallard, B. W.; Woodruff, S. & Wood, R. D.
Partner: UNT Libraries Government Documents Department
open access

LDRD Final Report for 01-ERD-100 FLIRT: A Magnetic Field Topology Diagnostic for Spheromaks and Other Self-Organized Magnetically Confined Plasmas

Description: Tangled magnetic field lines are common in laboratory and space plasmas, but determining the geometrical structure of magnetic fields in the presence of plasma is a difficult and still unresolved problem. To address this open question we developed and tested a new technique for measuring the magnetic field-line topology in magnetically confined plasmas. Our field-line tracing diagnostic (FLIRT) uses a high-power, short-pulse laser to launch a burst of energetic ({approx}100 keV) electrons from … more
Date: January 23, 2003
Creator: McLean, H. S.; Chen, H. & Ryutov, D. D.
Partner: UNT Libraries Government Documents Department
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