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ISOTOPIC COMPOSITION OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01
Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Arruda, L.,Azzarello, P.,Basile, M.,Barao, F.,Barreira, G.,Bartoloni, A.,Battiston, R.,Becker, R.,Becker, U.,Be IOP Publishing 2011 The Astrophysical journal Vol.736 No.2
<P>The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arrival in the heliosphere. In this paper, we present measurements of the isotopic ratios H-2/He-4, He-3/He-4, Li-6/Li-7, Be-7/(Be-9+Be-10), and B-10/B-11 in the range 0.2-1.4 GeV of kinetic energy per nucleon. The measurements are based on the data collected by the Alpha Magnetic Spectrometer, AMS-01, during the STS-91 flight in 1998 June.</P>
EXPLORING THE FUEL ECONOMY POTENTIAL OF ISG HYBRID ELECTRIC VEHICLES THROUGH DYNAMIC PROGRAMMING
Ao, G.Q.,Qiang, J.X.,Zhong, H.,Yang, L.,Zhuo, B. The Korean Society of Automotive Engineers 2007 International journal of automotive technology Vol.8 No.6
Hybrid electric vehicles(HEV) combined with more than one power sources have great potential to improve fuel economy and reduce pollutant emissions. The Integrated Starter Generator(ISG) HEV researched in this paper is a two energy sources vehicle, with a conventional internal combustion engine(ICE) and an energy storage system(batteries). In order to investigate the potential of diesel engine hybrid electric vehicles in fuel economy improvement and emissions reduction, a Dynamic Programming(DP) based supervisory controller is developed to allocate the power requirement between ICE and batteries with the objective of minimizing a weighted cost function over given drive cycles. A fuel-economy-only case and a fuel & emissions case can be achieved by changing specific weighting factors. The simulation results of the fuel-economy-only case show that there is a 45.1% fuel saving potential for this ISG HEV compared to a conventional transit bus. The test results present a 39.6% improvement in fuel economy which validates the simulation results. Compared to the fuel-economy-only case, the fuel & emissions case further reduces the pollutant emissions at a cost of 3.2% and 4.5% of fuel consumption with respect to the simulation and test result respectively.
EXPLORING THE FUEL ECONOMY POTENTIAL OF ISG HYBRID ELECTRIC VEHICLES THROUGH DYNAMIC PROGRAMMING
G.-Q. AO,J.-X. QIANG,H. ZHONG,L. YANG,B. ZHUO 한국자동차공학회 2007 International journal of automotive technology Vol.8 No.6
Hybrid electric vehicles (HEV) combined with more than one power sources have great potential to improve fuel economy and reduce pollutant emissions. The Integrated Starter Generator (ISG) HEV researched in this paper is a two energy sources vehicle, with a conventional internal combustion engine (ICE) and an energy storage system (batteries). In order to investigate the potential of diesel engine hybrid electric vehicles in fuel economy improvement and emissions reduction, a Dynamic Programming (DP) based supervisory controller is developed to allocate the power requirement between ICE and batteries with the objective of minimizing a weighted cost function over given drive cycles. A fuel-economy-only case and a fuel & emissions case can be achieved by changing specific weighting factors. The simulation results of the fuel-economy-only case show that there is a 45.1% fuel saving potential for this ISG HEV compared to a conventional transit bus. The test results present a 39.6% improvement in fuel economy which validates the simulation results. Compared to the fuel-economy-only case, the fuel & emissions case further reduces the pollutant emissions at a cost of 3.2% and 4.5% of fuel consumption with respect to the simulation and test result respectively.
오위(AO WEI),신백균(P.-K. SHIN),송창호,박구범(G.-B. Park),유도현(D.-H. Yu),이선우(Sunwoo Lee),이붕주(B.-J. Lee),이덕출(D.-C. LEE) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Recently poly styrene (PPS) and poly vinyl acetate (PVA) are being investigated as a gate insulator for organic thin film transistors(OTFTs), because their dielectric constant for PVA and PPS is high enough to be used for gate insulator in the OTFT device. We report characteristics of single layer dielectric constant for PPS and PVA, and double layer of PPS/PVA prepared by different plasma power. Composition and electrical properties of the plasma polymerized insulating layer were investigated by FT-IR, I-V, and C-V measurements. Influence of the preparation condition on the resulting plasma polymerized thin films were discussed.
Commissioning Status of the Linac for the Facility for Rare Isotope Beams
Lidia S.,Ao H.,Barnes B.,Bennett R.,Bernal-Ruiz E.,Bollen G.,Brandon J.,Bull B.,Bultman N.,Casagrande F.,Chabot D.,Cogan S.,Compton C.,Davidson K.,Daykin E.,Georgiobani D.,Gibson P.,Grender I.,Kim S.- 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.5
The Facility for Rare Isotope Beams will be completed in late 2021. We report here on the current efforts to commission the first stages of the 200-MeV/u superconducting, continuous wave heavy-ion linac. The statuses of the cryogenic plant and its distribution system, the accelerator cryomodule commissioning and operations, the ion source and front end transport development, the radio-frequency quadrupole commissioning, and thenbeam dynamics development to support high-power operation are reviewed. Plans for commissioning the remainder of the linac systems are presented.
RELATIVE COMPOSITION AND ENERGY SPECTRA OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01
Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Arruda, L.,Azzarello, P.,Basile, M.,Barao, F.,Barreira, G.,Bartoloni, A.,Battiston, R.,Becker, R.,Becker, U.,Be IOP Publishing 2010 The Astrophysical journal Vol.724 No.1
Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
AMS-01 Collaboration,Aguilar, M.,Alcaraz, J.,Allaby, J.,Alpat, B.,Ambrosi, G.,Anderhub, H.,Ao, L.,Arefiev, A.,Azzarello, P.,Baldini, L.,Basile, M.,Barancourt, D.,Barao, F.,Barbier, G.,Barreira, G.,Bat North-Holland Pub. Co 2007 Physics letters: B Vol.646 No.4
A measurement of the cosmic ray positron fraction e<SUP>+</SUP>/(e<SUP>+</SUP>+e<SUP>-</SUP>) in the energy range of 1-30 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its 10 day Space Shuttle flight in June 1998. A proton background suppression on the order of 10<SUP>6</SUP> is reached by identifying converted bremsstrahlung photons emitted from positrons.