A5025302807- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Remote Sensing and LiDAR Applications
- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Spacecraft and Cryogenic Technologies
- Climate variability and models
- Radioactive element chemistry and processing
- Nuclear Physics and Applications
- Geochemistry and Elemental Analysis
- Scientific Research and Discoveries
- Neutrino Physics Research
- Advanced Thermodynamic Systems and Engines
- Tree-ring climate responses
- Particle Accelerators and Free-Electron Lasers
- Extraction and Separation Processes
- Climate change and permafrost
- Atomic and Subatomic Physics Research
- Solar and Space Plasma Dynamics
University of Wisconsin–Madison
2024
Shandong University
2006-2015
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2014
A precision measurement by the Alpha Magnetic Spectrometer on International Space Station of positron fraction in primary cosmic rays energy range from 0.5 to 350 GeV based $6.8\ifmmode\times\else\texttimes\fi{}{10}^{6}$ and electron events is presented. The very accurate data show that steadily increasing 10 $\ensuremath{\sim}250\text{ }\text{ }\mathrm{GeV}$, but, 20 250 GeV, slope decreases an order magnitude. spectrum shows no fine structure, ratio observable anisotropy. Together, these...
A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge dependence important understanding origin, acceleration, and propagation rays. We present detailed variation spectral index for first time. The progressively hardens at high rigidities.Received 6 March 2015DOI:https://doi.org/10.1103/PhysRevLett.114.171103This article available under terms Creative Commons Attribution 3.0...
Measurements of the positron fraction in high energy cosmic rays using space-borne Alpha Magnetic Spectrometer have been extended to energies 500 GeV. The new results show that stops increasing with at around 200
Precision measurements by the Alpha Magnetic Spectrometer on International Space Station of primary cosmic-ray electron flux in range 0.5 to 700 GeV and positron 500 are presented. The each require a description beyond single power-law spectrum. Both change their behavior at ∼30 but fluxes significantly different magnitude energy dependence. Between 20 200 spectral index is harder than index. determination differing indices versus new observation provides important information origins...
We present a measurement of the cosmic ray (e^{+}+e^{-}) flux in range 0.5 GeV to 1 TeV based on analysis 10.6 million events collected by AMS. The statistics and resolution AMS provide precision flux. is smooth reveals new distinct information. Above 30.2 GeV, can be described single power law with spectral index γ=-3.170±0.008(stat+syst)±0.008(energy scale).
Abstract An improved understanding of dynamical coupling from regional to global scales via tropospheric or stratospheric region can be helpful in improving seasonal forecasts for a given interest. Here we investigate between the equatorial Quasi-biennial oscillation and boreal winter surface climate Northern Hemisphere mid high latitudes using 42 years data (1979–2020). For neutral El Niño Southern Oscillation periods, westerly phase at 70 hPa favors sea level pressure polar region, colder...
An LHP-based thermal control system for cryocoolers on the Alpha Magnetic Spectrometer (AMS-02) has been designed, and analyzed by means of level model based Sinda/Fluint. Integrated with International Space Station (ISS) a time-varying sink temperature definition, performance is investigated. A parametric analysis carried out also to understand influence critical parameters operation LHP.