NASA Scientific and Technical Aerospace Reports

charge interaction. We were able to reach greater than 100 kV/cm in the first four gaps. We also performed experiments on
a converging 119 multi-beamlet source. Although the source has the same optics as a full 1.6 MV injector system, these test
were carried out at 400 kV due to the test stand HV limit. We have measured the beam’s emittance after the beamlets are
merged and passed through an electrostatic quadrupole (ESQ). Our goal is to confirm the emittance growth and to demonstrate
the technical feasibility of building a driver-scale HIF injector.
NTIS
Brightness; Injectors; Ion Beams
20060002481 Lawrence Livermore National Lab., Livermore, CA USA
Science Day 2005 Poster Abstracts: Nuclear Physics
Kline, K. M.; Apr. 08, 2005; 12 pp.; In English
Report No.(s): DE2005-15016439; UCRL-PROC-211199; No Copyright; Avail.: Department of Energy Information Bridge
The document is a collection of abstracts of posters and exhibits on the subject of nuclear physics.
NTIS
Nuclear Physics; Science
20060002483 Lawrence Livermore National Lab., Livermore, CA USA
Irradiation Effects on RIA Fragmentation CU Beam Dump
Reyes, S.; Boles, J. L.; Ahle, L. E.; Stein, W.; Wirth, B. D.; May 11, 2005; 10 pp.; In English
Report No.(s): DE2005-15016440; UCRL-CONF-212167; No Copyright; Avail.: National Technical Information Service
(NTIS)
Within the scope of conceptual research and development (R&D) activities in support of the Rare Isotope Accelerator
(RIA) facility, high priority is given to the development of high-power fragmentation beam dumps. A pre-study was made of
a static water-cooled Cu beam dump that can meet requirements for a 400 MeV/u uranium beam. The issue of beam sputtering
was addressed and found to be insignificant. Preliminary radiation transport simulations show significant damage (in
displacements per atom, DPA) in the vicinity of the Bragg peak of the uranium ions. Experimental data show that defects in
Cu following neutron or high-energy particle irradiation tend to saturate at doses between 1 and 5 DPA, and this saturation
in defect density also results in saturation of mechanical property degradation. However, effects of swift heavy ion irradiation
and the production of gaseous and solid transmutant elements still need to be addressed. Initial calculations indicate that He
concentrations on the order of 400 appm are produced in the beam dump after several weeks of continuous operation and He
embrittlement may be a concern. Recommendations are made for further investigation of Cu irradiation effects for
RIA-relevant conditions.
NTIS
Fragmentation; Irradiation; Isotopes
20060002485 Lawrence Livermore National Lab., Livermore, CA USA
Science Day 2005 Poster Abstracts: Light and Matter
Kline, K. M.; Apr. 07, 2005; 16 pp.; In English
Report No.(s): DE2005-15016445; UCRL-PROC-211168; No Copyright; Avail.: Department of Energy Information Bridge
Contents: The Quantum Nature of Light: Using Highly Charged Uranium to Test Quantum Theory with Unprecedented
Accuracy; Hot Hohlraums and Albert Einstein; Short-Pulse Laser Absorption and Solid-Target Heating at Relativistic Laser
Intensities; Relativistic Plasma Simulations; Pair Production and Positron Annihilation; Electron Speedometer for Solid-
Density Plasmas; Superconducting Ultrahigh-Energy-Resolution X-Ray, Gamma-Ray, and Neutron Spectrometers;
Hyperspectral Imaging; Past, Present, and Future of Relativistic Optical Technology at LLNL; Watching Crystals Melt in Real
Time with Ultrafast X-Ray Vision; The Wave/Particle Duality of Light; Shining New Light on High-Energy Physics: Photon
Colliders at the High-Energy Frontier; Exploiting the Duality of Light in Photonic Integrated Circuits and Fiber-Based
Systems; X-Ray Tomography from High-Energy-Density Physics Targets to Michelangelo’s David; The Solid-State Heat
Capacity Laser; Janus Intense Short Pulse: The Next Ultrahigh Intensity Laser at LLNL; Mapping Phonons at High-Pressure:
Phase Transformation, Phase Stability, and Elastic Anisotropy; Ultrafast Science; Brownian Motion for Photons; Asymptotic
Freedom in the Diffusive Regime of Neutron Transport.
NTIS
Abstracts; Light Sources; Science
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