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478 Matching Results
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Laser neutralization
Laser photodetachment of the excess electron to neutralize relativistic ions offers many advantages over the more conventional collisional methods using gases or thin foils as the neutralization agents. Probably the two most important advantages of laser photodetachment are the generation of a compact and low divergence beam, and the production of intense neutral beams at very high efficiency (approximately 90%). The high intensities or high current densities of the neutral beam result from the fixed maximum divergence that can be added to the beam by photodetachment of the charge using laser intensity of fixed wavelength and incident angle. The high neutralization efficiency is possible because there is no theoretical maximum to the neutralization efficiency, although higher efficiencies require higher laser powers and, therefore, costs. Additional advantages include focusability of the laser light onto the ion beam to maximize its efficacy. There certainly is no residual gas left in the particle beam path as is typical with gas neutralizers. The photodetachment process leaves the neutral atoms in the ground state so there is no excited state fluorescence to interfere with the subsequent beam sensing. Finally, since the beams to be neutralized are very high powered, for a large range of neutralization …
Date:
June 17, 1986
Creator:
Peterson, O.G.
Object Type:
Report
System:
The UNT Digital Library
Hadronic production of J/sup PC/ = 2/sup + +/ glueballs
An OZI suppressed channel with variable mass, namely the reaction ..pi../sup -/p ..-->.. phi phi n, has been used as a filter which allows resonating gluons or glueballs to pass, while strongly rejecting conventional quark-built hadronic states. The breakdown of the OZI suppression signals a glueball. Glueball mass and particle width estimates are discussed. Reasons why g/sub T/'s have not been seen in other channels, particularly the decay of J/psi, are considered. 34 refs., 9 figs. (LEW)
Date:
March 17, 1986
Creator:
Lindenbaum, S. J.
Object Type:
Article
System:
The UNT Digital Library
Glovebox pressure relief and check valve
This device is a combined pressure relief valve and check valve providing overpressure protection and preventing back flow into an inert atmosphere enclosure. The pressure relief is embodied by a submerged vent line in a mercury reservior, the releif pressure being a function of the submerged depth. The pressure relief can be vented into an exhaust system and the relieving pressure is only slightly influenced by the varying pressure in the exhaust system. The check valve is embodied by a ball which floats on the mercury column and contacts a seat whenever vacuum exists within the glovebox enclosure. Alternatively, the check valve is embodied by a vertical column of mercury, the maximum back pressure being a function of the height of the column of mercury.
Date:
March 17, 1986
Creator:
Blaedel, K. L.
Object Type:
Report
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 78, No. 16, Ed. 1 Thursday, April 17, 1986
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
April 17, 1986
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 78, No. 29, Ed. 1 Thursday, July 17, 1986
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
July 17, 1986
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
Tapping the earth's geothermal resources: Hydrothermal today, magma tomorrow
The paper discusses geothermal resources, what it is, where it is, and how to extract energy from it. The materials research activities at Brookhaven National Laboratory related to geothermal energy extraction are discussed. These include high-temperature, light-weight polymer cements, elastomers, biochemical waste processing techniques, and non-metallic heat exchanger tubing. The economics of geothermal energy is also discussed. (ACR)
Date:
December 17, 1986
Creator:
Kukacka, L. E.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Carl's Corner]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 17, 1986, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Plane crash]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 17, 1986, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Margaret Avery]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 17, 1986, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Bogata News (Bogata, Tex.), Vol. 75, No. 28, Ed. 1 Thursday, April 17, 1986
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
April 17, 1986
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Prince arrives]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 17, 1986, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Bogata News (Bogata, Tex.), Vol. 75, No. 41, Ed. 1 Thursday, July 17, 1986
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
July 17, 1986
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Versatile laser glass inspection and damage testing facility
A test facility is described which detects small opaque inclusions in large transparent components by using a commercial laser which delivers high energy pulses to the test sample at moderate frequency in a small diameter beam. The sample is automatically scanned such that each point in the volume is irradiated with ten pulses at twice the inclusion damage threshold - an amount sufficient to cause visible damage at inclusion sites. This approach permits detection of opaque inclusions in the parts per trillion and lower concentration range. The specifics of the device design and its performance are discussed in the context of automatic inclusion inspection and mapping in large laser optics.
Date:
January 17, 1986
Creator:
Marion, J. E.; Greiner, G. J.; Campbell, J. H.; Chaffee, P. H.; Hildum, J. S.; Grens, J. Z. et al.
Object Type:
Article
System:
The UNT Digital Library
Optimized flashlamp pumping of disc amplifiers
Disk amplifier design for inertial fusion lasers has evolved with changing fusion-driver requirements from a primary emphasis on gain to a primary emphasis on efficiency. In this paper we compare Shiva and Nova amplifiers to a developmental amplifier (SSA) and show greater than a two-fold improvement in efficiency over past designs under all operating conditions. Experiments to optimize the efficiency of the SSA show that preionization of the flashlamps produces significant benefits and that the packing fraction of lamps is more important than the flashlamp reflector shape. They also show that the optimized flashlamp pulselength and reflector geometry depend on the desired stored energy in the laser medium. We have demonstrated a 7% storage efficiency at a stored fluence per disk of 0.5 J/cm/sup 2/ (stored energy density of 0.06 J/cm/sup 3/) and 4% at 2.0 J/cm/sup 2/ (0.25 J/cm/sup 3/). Comparison of SSA measurements with storage-efficiency calculations show that our flashlamp model accurately predicts the single-pass pumping of disk amplifiers. 24 refs., 22 figs.
Date:
January 17, 1986
Creator:
Murray, J. E.; Powell, H. T. & Woods, B. W.
Object Type:
Article
System:
The UNT Digital Library
Covariances of evaluated nuclear data based upon uncertainty information of experimental data and nuclear models
A straightforward derivation is presented for the covariance matrix of evaluated cross sections based on the covariance matrix of the experimental data and propagation through nuclear model parameters. 10 refs.
Date:
November 17, 1986
Creator:
Poenitz, W. P. & Peelle, R. W.
Object Type:
Article
System:
The UNT Digital Library
The Cherokeean. (Rusk, Tex.), Vol. 137, No. 23, Ed. 1 Thursday, July 17, 1986
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
July 17, 1986
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Cherokeean. (Rusk, Tex.), Vol. 137, No. 10, Ed. 1 Thursday, April 17, 1986
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
April 17, 1986
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[Letter from Margaret Winn - November 17, 1986]
Letter from Margaret Winn requesting a donation of school supplies for a drug and alcohol education program sponsored by the San Antonio chapter of The Links, Inc.
Date:
November 17, 1986
Creator:
Links, Inc. San Antonio Chapter.
Object Type:
Letter
System:
The Portal to Texas History
[Workshop: Alternatives to Teenage Pregnancy and Drug and Alcohol Abuse]
Program for a mini-workshop held at Martin Luther King Jr. Middle School on April 17th, 1986. The workshop, titled "You Decide: Alternatives to Teenage Pregnancy, Alternatives to Drug and Alcohol Abuse," was hosted by the Links Incorporated San Antonio Chapter and the Martin Luther King Student Council.
Date:
April 17, 1986
Creator:
Links, Inc. San Antonio Chapter.
Object Type:
Pamphlet
System:
The Portal to Texas History
Texas Register, Volume 11, Number 46, Pages 2775-2842, June 17, 1986
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
June 17, 1986
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 11, Number 78, Pages 4289-4320, October 17, 1986
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
October 17, 1986
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 11, Number 5, Pages 239-310, January 17, 1986
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
January 17, 1986
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[News Clip: "Runaway Train"]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 17, 1986, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Zales]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 17, 1986
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library