NASA Scientific and Technical Aerospace Reports

Tevatron. We report here preliminary results on key elements to the measurement including B(sub s) event reconstruction,
proper time resolution and initial B flavor tagging. The prospects on B(sub s) mixing with the upgraded CDF and D0 detectors
are also discussed.
NTIS
Hadrons; Particle Accelerators
20040120906 Sandia National Labs., Albuquerque, NM
Developing a Multifidelity Modeling Algorithm for System-Level Engineering Analysis
Gardner, D. R.; Hennigan, G. L.; Feb. 2003; In English
Report No.(s): DE2004-820880; SAND2003-0399; No Copyright; Avail: National Technical Information Service (NTIS)
Multifidelity modeling, in which one component of a system is modeled at a significantly different level of fidelity than
another, has several potential advantages. For example, a higher-fidelity component model can be evaluated in the context of
a lower-fidelity full system model that provides more realistic boundary conditions and yet can be executed quickly enough
for rapid design changes or design optimization. Developing such multifidelity models presents challenges in several areas,
including coupling models with differing spatial dimensionalities. In this report we describe a multifidelity algorithm for
thermal radiation problems in which a three-dimensional, finite-element model of a system component is embedded in a
system of zero-dimensional (lumped-parameter) components. We tested the algorithm on a prototype system with three
problems: heating to a constant temperature, cooling to a constant temperature, and a simulated fire environment.
NTIS
Heat Transfer; Cooling Systems; Systems Analysis
20040120916 Lawrence Livermore National Lab., Livermore, CA
Deployment, Commissioning and Operation of Plasma Electrode Pockels Cells in the National Ignition Facility
Arnold, P. A.; Ollis, C. W.; Hinz, A.; Robb, C.; Dec. 01, 2003; 18 pp.; In English
Report No.(s): DE2004-15007263; UCRL-CONF-155436; No Copyright; Avail: Department of Energy Information Bridge
Large aperture Plasma Electrode Pockels Cells (PEPCs) are an enabling technology in the National Ignition Facility (NIF)
at the Lawrence Livermore National Laboratory. The Pockels cells allow the NIF laser to take advantage of multipass main
amplifier architecture, thus reducing costs and physical size of the facility. Each Pockels cell comprises four 40-cm x 40-cm
apertures arranged in a4x1array. The combination of the Pockels cell and a thin-film polarizer, also configured in a4x1
array, forms an optical switch that is key to achieving the required multi-pass operation.
NTIS
Amplifiers; Plasma Electrodes
20040120917 Academy of Sciences (USSR), Novosibirsk, USSR, Kentucky Univ., Lexington, KY, USA, Stanford Linear
Accelerator Center, Stanford, CA, USA
Radiative Decays, Nonet Symmetry and SU(3) Breaking
Benayoun, M.; DelBuono, L.; Eidelman, S.; Ivanchenko, V. N.; 2004; 42 pp.; In English
Report No.(s): DE2004-10196; UK/TP 99-01; LPNHE 99-01,SLAC-PUB-8048; No Copyright; Avail: Department of Energy
Information Bridge
We re-examine the problem of simultaneously describing in a consistent way all radiative and leptonic decays of light
mesons (V(yields) P(gamma), P(yields) V(gamma), P(yields)(gamma)(gamma), V(yields) e(sup+)e(sup -)). For this purpose,
we rely on the Hidden Local Symmetry model in both its anomalous and non-anomalous sectors. We show that the SU(3)
symmetry breaking scheme proposed by Bando, Kugo and Yamawaki, supplemented with nonet symmetry breaking in the
pseudoscalar sector, allows one to reach a nice agreement with all data, except for the K*(sup(+-)) radiative decay. An
extension of this breaking pattern allows one to account for this particular decay mode too. Considered together, the whole
set of radiative decays provides a pseudoscalar mixing angle(theta)(sub P)(approx-equal) and a value for(theta)(sub V) which
is(approx-equal) 3(sup o) from that of ideal mixing. We also show that it is impossible, in a practical sense, to disentangle the
effects of nonet symmetry breaking and those of glue inside the(eta)(prime), using only light meson decays.
NTIS
Broken Symmetry; Particle Decay
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