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Cooling of highly charged ions in a Penning trap

Description: Highly charged ions are extracted from an electron beam ion trap and guided to Retrap, a cryogenic Penning trap, where they are merged with laser cooled Be{sup +} ions. The Be{sup +} ions act as a coolant for the hot highly charged ions and their temperature is dropped by about 8 orders of magnitude in a few seconds. Such cold highly charged ions form a strongly coupled nonneutral plasma exhibiting, under such conditions, the aggregation of clusters and crystals. Given the right mixture, these … more
Date: March 31, 2000
Creator: Gruber, L
Partner: UNT Libraries Government Documents Department
open access

Inertial fusion technology spin-offs-history provides a glimpse of the future

Description: The development and demonstration of inertial fusion is incredibly challenging because it requires simultaneously controlling and precisely measuring parameters at extreme values in energy, space, and time. The challenges range from building megajoule (10{sup 6} J) drivers that perform with percent-level precision to fabricating targets with submicron specifications to measuring target performance at micron scale (10{sup -6} m) with picosecond (10{sup -12} s) time resolution. Over the past 30 y… more
Date: March 7, 2000
Creator: Powell, H
Partner: UNT Libraries Government Documents Department
open access

Inertial Conference Fusion Semiannual Report October 1999 - March 2000, Volume 1, Number 1

Description: This first issue of the ''ICF Semiannual Report'' contains articles whose diverse subjects attest to the broad technical and scientific challenges that are at the forefront of the ICF program at LLNL. The first article describes the progress being made at solving the surface roughness problem on capsule mandrels. All NIF capsule options, except machined beryllium, require a mandrel upon which the ablator is deposited. This mandrel sets the baseline sphericity of the final capsule. Problems invo… more
Date: March 1, 2000
Creator: Hammel, B. A.
Partner: UNT Libraries Government Documents Department
open access

Lasershot peening--a means to strengthen metals

Description: Lasershot peening is an emerging modern process that impresses a compressive stress into the surfaces of metals, improving their operational lifetime. Almost everyone is familiar with taking a strip of metal or a wire and bending it multiple times until it breaks. In this situation, when the metal is bent, the surface of outer radius is stretched into a tensile state. Under tension, any flaw or micro-crack will grow in size with each bending of the metal until the crack grows through the entire… more
Date: March 1, 2000
Creator: Chen, H. L.
Partner: UNT Libraries Government Documents Department
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