X. L. Qian
A5038473742- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Advanced Sensor and Energy Harvesting Materials
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Gamma-ray bursts and supernovae
- Magnetic confinement fusion research
- Radio Astronomy Observations and Technology
- Particle accelerators and beam dynamics
- Advanced Fiber Optic Sensors
- Modular Robots and Swarm Intelligence
- Solar Radiation and Photovoltaics
- Context-Aware Activity Recognition Systems
- Quantum Chromodynamics and Particle Interactions
- Geomagnetism and Paleomagnetism Studies
- Pulsars and Gravitational Waves Research
- Soft Robotics and Applications
- Innovative Energy Harvesting Technologies
- Tactile and Sensory Interactions
Shandong Management University
2021-2024
Nanjing Tech University
2023-2024
National Astronomical Observatories
2021-2023
Chinese Academy of Sciences
2013-2023
Institute of High Energy Physics
2013-2019
Shandong University
2013-2019
Thomas Jefferson National Accelerator Facility
2017
Argonne National Laboratory
2017
We report, for the first time, long-awaited detection of diffuse gamma rays with energies between 100 TeV and 1 PeV in Galactic disk. Particularly, all above 398 are observed apart from known gamma-ray sources compatible expectations hadronic emission scenario which originate decay $π^0$'s produced through interaction protons interstellar medium Galaxy. This is strong evidence that cosmic accelerated beyond our Galaxy spread over
Abstract We report on the analysis of 10–1000 TeV large-scale sidereal anisotropy Galactic cosmic rays (GCRs) with data collected by Tibet Air Shower Array from 1995 October to 2010 February. In this analysis, we improve energy estimate and extend decl. range down −30°. find that maps above 100 are distinct at a multi-TeV band. The so-called tail-in loss-cone features identified low energies get less significant, new component appears ∼100 TeV. spatial distribution GCR intensity an excess...
We report on a clear solar-cycle variation of the Sun's shadow in 10 TeV cosmic-ray flux observed by Tibet air shower array during full solar cycle from 1996 to 2009. In order clarify physical implications variation, we develop numerical simulations shadow, using potential field source surface model and current sheet (CSSS) for coronal magnetic field. find that intensity deficit simulated is very sensitive structure, better reproduced CSSS model. This first successful attempt evaluate models flux.
We report observations of gamma-ray emissions with energies in the 100 TeV energy region from Cygnus our Galaxy. Two sources are significantly detected directions OB1 and OB2 associations. Based on their positional coincidences, we associate one a pulsar PSR J2032+4127 other mainly wind nebula PWN G75.2+0.1 moving away its original birthplace situated around centroid observed emission. This work would stimulate further studies particle acceleration mechanisms at these sources.
In this paper, an intelligent insole that contains five wide-range flexible capacitive pressure sensors is developed. The output signal of these collected and processed by a portable microprocessor system, which then transmitted to cloud platform via Wi-Fi module. ensuing data visualization constructed with WeChat mini-program. flexibility achieved employing composition materials high pressure-sensitive effect. A novel approach proposed fabricate dielectrics, thereby significantly enhancing...
We analyze the Sun's shadow observed with Tibet-III air shower array and find that shadow's center deviates northward (southward) from optical solar disk in "away" ("toward") interplanetary magnetic field (IMF) sector. By comparing numerical simulations based on model, we average IMF strength away (toward) sector is 1.54±0.21_{stat}±0.20_{syst} (1.62±0.15_{stat}±0.22_{syst}) times larger than model prediction. These demonstrate a useful tool for quantitative evaluation of field.
Abstract We examine the possible influence of Earth-directed coronal mass ejections (ECMEs) on Sun’s shadow in 3 TeV cosmic-ray intensity observed by Tibet-III air shower (AS) array. confirm a clear solar-cycle variation deficit during ten years between 2000 and 2009. This is overall reproduced our Monte Carlo (MC) simulations based potential field model solar magnetic averaged over each rotation period. find, however, that magnitude significantly less than predicted MC simulations,...
We have upgraded the new Tibet ASgamma experiment in China since 2014 to measure chemical composition of cosmic rays around knee. This hybrid consist an air-shower-core detector array (YAC-II) detect high energy electromagnetic component, air-shower (Tibet-III) and a large underground water-Cherenkov muon-detector (MD). carried out detailed Monte Carlo (MC) simulation study performance detectors by using CORSIKA (version 7.5000), which includes EPOS-LHC, QGSJETII-04, SIBYLL2.1 SIBYLL2.3...
In this letter, a flexible resonant pressure sensor is presented. The consists of two parts: pressure-sensitive capacitor and pair inductors. the inductors are connected in series form an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> tank. innovation that dielectric capacitor, made polydimethylsiloxane, enhanced by anisotropic distribution nano iron particles (nmFe) inside. This method effectively enlarges sensitivity extends...
Abstract Cosmic rays do not arrive at the Earth uniformly. Recent experiments have consistently observed small anisotropies with amplitudes of ∼0.2% in arrival directions cosmic TeV energies. We perform modeling cosmic-ray anisotropy energies using intensity-mapping method based on Liouville’s theorem. This work indicates unrealistically small-scale ansiotropies <∼10° angular scales distribution relative intensity outer boundary heliosphere. would possibly need to resolve an issue that...
Gamma-ray observation in the sub-PeV range helps us search for Galactic PeV cosmic-ray accelerators, PeVatrons. Measurement of energy spectrum gamma rays from astrophysical sources is especially crucial to discuss their hadronic or leptonic origin. In this study, sky region HESS J1843−033 are observed by Tibet air shower array equipped with underground muon detector array. A new gamma-ray source TASG J1844−038 detected above 25 TeV a 6.2 𝜎 level interest, position which consistent J1843−033,...
A hybrid experiment has been started by the ASγ at Yangbajing (4300m a.s.l.) in Tibet since May 2009, that consists of a high-energy air-shower-core array (YAC-I) and high-density air-shower (Tibet-III). In this paper, we report our results to check hadronic interaction models SIBYLL2.3, SIBYLL2.1, EPOS-LHC QGSJETII-04 multi-tens TeV energy region using YAC-I+Tibet-III experimental data from 2009 through January 2010. The effective live time is calculated as 106.05 days. show description...
Gamma rays from HESS J1849$-$000, a middle-aged TeV pulsar wind nebula (PWN), are observed by the Tibet air shower array and muon detector array. The detection significance of gamma reaches $4.0\, σ$ $4.4\, levels above 25 100 TeV, respectively, in units Gaussian standard deviation $σ$. energy spectrum measured between $40\, {\rm TeV} < E 320\, TeV}$ for first time is described with simple power-law function ${\rm d}N/{\rm d}E = (2.86 \pm 1.44) \times 10^{-16}(E/40\, TeV})^{-2.24 0.41}\,...
In this article, we present a self-powered pressure sensor based on flexible permanent magnetic material. The consists of two main components: soft block and coil. part is composed PMDS Nd <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> Fe xmlns:xlink="http://www.w3.org/1999/xlink">14</inf> B, with the addition NH xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> HCO xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> to adjust its...