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Showing 1 to 20 of 20 for “"SLAC"”.
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Search for axion-like particles in the slac beam dump
… made at the Stanford Linear Accelerator Center (SLAC) by dumping 30 Coulombs of 20 GeV electrons into a beam absorption facility. After 179 meters of earth shielding the in-flight decay of the particle into two photons or an electron-positron pair, in a decay volume of 204 meters in length, was …
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Experimental studies of novel accelerator structures at 11 GHz and 17 GHz
… Hz repetition rate at X-Band (11.424 GHz) at the SLAC accelerator test stand, achieving a gradient of 128 MV/m at a breakdown probability of 3.6 x 10-3 per pulse per meter at a pulse length of 150 ns. The PBG-E structure showed major improvement in breakdown rate relative to a round-rod PBG …
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Biological and biomimetic oxygen electro-reduction by enzymes
… laccase enzyme from Streptomyces coelicolor (SLAC) and zinc finger DNA binding domain from Zif268 is demonstrated to bind double stranded DNA in a site specific manner while retaining enzymatic activity. The proof of principle for DNA templated enzyme immobilization demonstrates the …
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Evolutionary methods for self-organizing cooperation in peer-to-peer networks
… better. The proposed algorithms, called SLAC and SLACER, draw inspiration from tag systems originated in computational sociology, the main idea behind the algorithm consists in having low performance nodes copying high performance ones. The algorithm is run locally by every node and leads …
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Engineering heme-copper and multi-copper oxidases for efficient oxygen reduction catalysis
… is a multi-copper oxidase called small laccase (SLAC), which consists of a catalytic trinuclear copper center (TNC) and a Type 1 (T1) Cu center for electron transfer. However, the ORR overpotential of SLAC is relatively high (400 mV) because of the lower reduction potential (Eo') of the T1 Cu …
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MEASUREMENT OF BRANCHING FRACTIONS OF B DECAYS TO K_1(1270) PI AND K_1(1400) PI AND DETERMINATION OF THE CKM ANGLE ALPHA FROM B0 --> A_1(1260)+/- PI-/+
… data, collected with the BaBar detector at the SLAC National Accelerator Laboratory, correspond to 454 million B Bbar pairs produced in e+ e- annihilation. We use the results to estimate the weak phase alpha from the time dependent CP asymmetries in B0 --> a_1(1260)+/- pi-/+ decays.
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Die Messung der spinabhaengigen Strukturfunktion g_1 des Deuteriums mit dem SMC Experiment
… Jahren am Stanford Linear Accelecator Center (SLAC) vorgenommen. Es wurde hier ein 20 GeV Elektronstrahl benutzt. Diese Messungen zeigten, dass die Wirkungsquerschnitte einem Skalenverhalten genuegen, welches charakteristisch ist fuer eine Streuung an punktfoermigen Konstituenten. Dies war vom …
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Measurement of the Branching Fraction and Search for Direct CP-Violation in the Radiative Decay B to K*Gamma with the BABAR Detector
… PEP-II des Stanford Linear Accelerator Centers (SLAC) aufgezeichnet. Die B->K*Gamma Verzweigungsverhältnisse wurden in vier K*-Zerfallskanälen gemessen. Eine Suche nach direkter CP-Verletzung im B->K*Gamma Kanal wurde ebenfalls durchgeführt.
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Bio-Nano Interfaces: Enzyme Immobilization for Biomimetic Energy Harvesting
… and may be genetically bound to small laccase (SLAC-3ZnF) or other redox enzymes. Utilizing scaffolds with gold nanoclusters (AuNC) for mediated electron transfer (MET), we test the capabilities for oxygen reduction reactions (ORR) by SLAC-3ZnF. Direct absorption on SWNT results in poor ORR …
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Measurements of B(Ds -> lvl) and fDs using data collected from the BaBar experiment
… all the data acquired at the BaBar detector at SLAC National Accelerator Laboratory, which were collected from September 1999 to April 2007, and comprised 531 fb-1. The following mea- surements are made: B(Ds -> eve) = (6:11 +/-0:38 +/- 0:33) * 10-3, B(Ds -> tvt) = (5:06 +/- 0:34 +/- 0:50) * …
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Experimental study of photonic band gap accelerator structures
… in a standing wave breakdown experiment at SLAC. The PBG structure was hot tested to gather breakdown statistics, and achieved an accelerating gradient of 65 MV/m at a breakdown rate of two breakdowns per hour at 60 Hz, and accelerating gradients above 110 MV/m at higher breakdown rates. …
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Green's function analysis of bunched charged particle beams
… The 75 MW-XP PPM 11.4 GHz klystron designed by SLAC is found to be operating above this current limit, which may explain the observance of non-negligible beam loss in this experiment.
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Developments and advances in nonlinear terahertz spectroscopy
… Xray pulses from the LCLS facility at the SLAC National Accelerator Laboratory. Finally, ongoing results involving energetic materials, stimulated Raman measurements, and Stark effect measurements are discussed. This work, coupled with the ongoing expansion of nonlinear THz techniques and …
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High Power Microwave Generation for Advanced Particle Acceleration
… MIT megawatt gyrotron, enabling the testing of a SLAC W-band accelerator cavity at gradients up to 230 MV/m.
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Direct Ion-Temperature Measurements Using High-Resolution Inelastic X-ray Scattering
… at the LINAC Coherent Light Source (LCLS) at SLAC National Accelerator Laboratory. Analysis of the resulting temperature profiles provides insight into the thermal properties of gold in a highly nonequilibrium regime. The measurements offer conclusive evidence of extreme superheating-ion …
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Clinical outcomes following reduction and pinning of lesser arc injuries without repair of the scapholunate interosseous ligament
… degeneration to a scapholunate advance collapse (SLAC) wrist. This study proposes a less invasive treatment method which includes closed reduction and pinning alone without repair of the scapholunate interosseous ligament. We propose that the majority of patients will obtain good function and pain …
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Measurement and Interpretation of Moments of the Combined Hadronic Mass and Energy Spectrum in Inclusive Semileptonic B-meson Decays
… experiment at the PEP-II e+e--storage rings at SLAC. We reconstruct the semileptonic decay by identifying a charged lepton in events tagged by a fully reconstructed hadronic decay of the second B meson. Correction procedures are derived from Monte Carlo simulations to ensure an unbiased …
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Die Arthroskopie bei Erkrankungen des Handgelenks
… ausreichend, die Entwicklung zum schmerzhaften SLAC-Wrist zu verhindern. Die Patienten mit drittgradiger skapholunärer Dissoziation (n=4) erreichten nach einer mediokarpalen Teilarthrodese eine Handgelenksbeweglichkeit von 61 % und eine Kraft von 35 % im Vergleich zur Gegenseite. Drei der vier …
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First measurement of the gluon polarisation in the nucleon using D mesons at COMPASS
… scattering (DIS) experiments at CERN, SLAC and <br>DESY. As a result the unpolarised structure functions have been measured <br>accurately over a wide kinematic range. From these measurements it is <br>possible to determine the gluon density in the nucleon with good accuracy via <br>a …