NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
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20040120918 Stanford Linear Accelerator Center, Stanford, CA, USA, Nagoya Univ., Nagoya, Japan, Saclay Research<br />
Centre, Gif-sur-Yvette, France<br />
Measurement of the Running b-Quark Mass Using e(sup+)e(sup-)yields b(bar b)g Events<br />
Br<strong>and</strong>enburg, A.; Burrows, P. N.; Muller, D.; Oishi, N.; Uwer, P.; May 1999; 24 pp.; In English<br />
Report No.(s): DE2004-10193; SLAC-PUB-7915; No Copyright; Avail: Department of Energy Information Bridge<br />
We have studied the determination of the running b-quark mass, m(sub b)(M(sub Z)), using Z(sup 0) decays into 3 or more<br />
hadronic jets. We calculated the ratio of(ge) 3-jet fractions in e(sup+)e(sup -)(yields) b(bar b) vs. e(sup+)e(sup -)(yields) q(sub<br />
l)(bar q)(sub l) (q(sub l)= u or d or s) events at next-to-leading order in perturbative QCD using six different infra-red- <strong>and</strong><br />
collinear-safe jet-finding algorithms. We compared with corresponding measurements from the SLD Collaboration <strong>and</strong> found<br />
a significant algorithm-dependence of the fitted m(sub b((M(sub Z)) value. Our best estimate, taking correlations into account,<br />
is m(sub b)(M(sub Z))= 2.52(+-) 0.27(stat.)(sub -0.47)(sup+0.33)(syst. )(sub -1.46)(sup+0.54)(theor.) GeV/c(sup 2).<br />
NTIS<br />
Measurement; Quarks; Quantum Chromodynamics<br />
20040120919 Fermi National Accelerator Lab., Batavia, IL, USA<br />
MCM II <strong>and</strong> the Trip Chip<br />
Estrada, J.; Garcia, C.; Hoeneisen, B.; Rubinov, P.; 2003; In English<br />
Report No.(s): DE2003-820406; FERMILAB-TM-2226; No Copyright; Avail: National <strong>Technical</strong> Information Service (NTIS)<br />
We describe the development of the electronics that will be used to read out the Fiber Tracker <strong>and</strong> Preshower detectors<br />
in Run IIb. This electronics is needed for operation at 132ns bunch crossing, <strong>and</strong> may provide a measurement of the z<br />
coordinate of the Fiber Tracker hits when operating at 396ns bunch crossing. Specifically, we describe the design <strong>and</strong><br />
preliminary tests of the Trip chip, MCM IIa, MCM IIb <strong>and</strong> MCM IIc. This document also serves as a user manual for the Trip<br />
chip <strong>and</strong> the MCM.<br />
NTIS<br />
Chips; User Manuals (Computer Programs)<br />
20040120927 Westinghouse Savannah River Co., Aiken, SC, USA<br />
Evaluation of the Effects of Tank 50H Solids on Dissolved Uranium, Plutonium <strong>and</strong> Neptunium<br />
Oji, L. N.; Hobbs, D. T.; 2003; In English<br />
Report No.(s): DE2004-819999; WSRC-TR-2003-00114; No Copyright; Avail: National <strong>Technical</strong> Information Service<br />
(NTIS)<br />
The study of the effects of contacting a simulated salt solution spiked with uranium, plutonium, <strong>and</strong> neptunium with Tank<br />
50H solids. General findings include: There is no evidence for interaction between Tank 50H solids <strong>and</strong> uranium from the<br />
spiked salt solution. Lack of uranium removal may reflect prior removal of uranium. There is evidence for interaction between<br />
Tank 50H solids with plutonium <strong>and</strong> neptunium as evidenced by loss of these two actinides from the salt solution. The amount<br />
of plutonium <strong>and</strong> neptunium lost from solution increased with an increase in the quantity of Tank 50H solids for a fixed<br />
simulant volume. The removal of plutonium <strong>and</strong> neptunium fit typical sorption isotherms allowing development of loading<br />
curves for estimating maximum solids loading. The maximum loading capacities for plutonium <strong>and</strong> neptunium in the<br />
simulants are, respectively, 2.01 <strong>and</strong> 4.48 micrograms per gram of Tank 50H solids. The oxalate in the Tank 50H solids is not<br />
directly responsible for the loss of plutonium <strong>and</strong> neptunium from the salt solution. The removal of plutonium <strong>and</strong> neptunium<br />
may be attributed to other minor components of the Tank 50H solids. We recommend additional testing to identify the<br />
component responsible for the plutonium <strong>and</strong> neptunium removal<br />
NTIS<br />
Uranium; Plutonium; Neptunium; Actinide Series<br />
20040120939 Westinghouse Savannah River Co., Aiken, SC, USA<br />
Heel Removal ANalysis for Mixing Pumps of Tank 8<br />
Lee, S. Y.; Dimenna, R. A.; 2003; In English<br />
Report No.(s): DE2004-811279; WSRC-TR-2002-00460; No Copyright; Avail: National <strong>Technical</strong> Information Service<br />
(NTIS)<br />
Computational fluid dynamics methods were used to recommend a slurry pump operational strategy for sludge heel<br />
removal in Tank 8. Flow patterns calculated by the model were used to evaluate the performance of various combinations of<br />
operating pumps <strong>and</strong> their orientation. The models focused on removal of the sludge heel located at the east side of Tank 8<br />
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