Results 1 to 10 of about 705,211 (267)
Collector Failures on 350 MHz, 1.2 MW CW Klystrons at the Low Energy Demonstration Accelerator (LEDA) [PDF]
eConf C000821 (2000) THE12, 2000 We are currently operating the front end of the accelerator production of tritium (APT) accelerator, a 7 MeV radio frequency quadrapole (RFQ) using three, 1.2 MW CW klystrons. These klystrons are required and designed to dissipate the full beam power in the collector. The klystrons have less than 1500 operational hours. One collector has failed and all
Bradley, J., Rees, D., Roybal, W.
arxiv +4 more sources
Heterostructure unipolar spin transistors [PDF]
, 2004 We extend the analogy between charge-based bipolar semiconductor electronics and spin-based unipolar electronics by considering unipolar spin transistors with different equilibrium spin splittings in the emitter, base, and collector. The current of base majority spin electrons to the collector limits the performance of ``homojunction'' unipolar spin ...
G. Vignale +3 more
arxiv +5 more sources
Detecting Spin-Polarized Currents in Ballistic Nanostructures [PDF]
Phys. Rev. Lett. 89, 266602 (2002)., 2002 We demonstrate a mesoscopic spin polarizer/analyzer system that allows the spin polarization of current from a quantum point contact in an in-plane magnetic field to be measured. A transverse focusing geometry is used to couple current from an emitter point contact into a collector point contact. At large in-plane fields, with the point contacts biased
A. S. Sachrajda +8 more
arxiv +5 more sources
A Density Functional Theory Study on the Effects of Silver Doping on the Properties and Flotation Behavior of Jamesonite [PDF]
MoleculesSilver (Ag) is a precious and valuable metal, and it has many carrier minerals. Through LA-ICP-MS analysis, it was found that jamesonite not only contains lead (Pb) and antimony (Sb) as precious metals but also trace amounts of Ag.
Huimin Chen +3 more
doaj +2 more sources
System Description for a Scalable, Fault-Tolerant, Distributed Garbage Collector [PDF]
arXiv, 2002 We describe an efficient and fault-tolerant algorithm for distributed cyclic garbage collection. The algorithm imposes few requirements on the local machines and allows for flexibility in the choice of local collector and distributed acyclic garbage collector to use with it.
Allen, N., Terriberry, T.
arxiv +4 more sources
Civil Engineering Journal, 2023 Extensive research has been conducted to address the issue of the reduced efficiency of solar photovoltaic (PV) cells at high temperatures. To address this problem, a hybrid cooling system has been developed.
S. D. Prasetyo +3 more
semanticscholar +1 more source
Solar, 2023 Concentrating Photovoltaic Thermal (CPVT) collectors are suitable for integration in limited roof space due to their higher solar conversion efficiency.
Sahand Hosouli +3 more
doaj +1 more source
An electron-deficient carbon current collector for anode-free Li-metal batteries
Nature Communications, 2021 The long-term cycling of anode-free Li-metal cells (i.e., cells where the negative electrode is in situ formed by electrodeposition on an electronically conductive matrix of lithium sourced from the positive electrode) using a liquid electrolyte is ...
Hyeokjin Kwon +8 more
semanticscholar +1 more source
Evaluation of electrical efficiency of photovoltaic thermal solar collector [PDF]
Engineering Applications of Computational Fluid Mechanics, 2020 In this study, machine learning methods of artificial neural networks (ANNs), least squares support vector machines (LSSVM), and neuro-fuzzy are used for advancing prediction models for thermal performance of a photovoltaic-thermal solar collector (PV/T).
M. Ahmadi +7 more
semanticscholar +1 more source
Искусство Евразии, 2021 This article is devoted to the reconstruction of the library of Sergei Petrovich Vinogradov (1853–1918), collector and historian of Russian engraved and lithographic portraits. The bulk of the library is currently kept in the Pushkin State Museum of Fine
Sokolova, E.V.
doaj +1 more source