A5034966816- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Neutrino Physics Research
- Particle Detector Development and Performance
- Chaos-based Image/Signal Encryption
- Dark Matter and Cosmic Phenomena
- Cryptographic Implementations and Security
- Coding theory and cryptography
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
Zhengzhou University
2024
University of Chinese Academy of Sciences
2024
Institute of Information Engineering
2024
Chinese Academy of Sciences
2024
State Key Laboratory of Information Security
2024
For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic Cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dominate flux up knee is currently under intensive theoretical phenomenological debate. The direct test ability operate as PeVatrons be provided by ultrahigh-energy (UHE; $E_\gamma \geq 100$~TeV) $\gamma$-rays. In this context, historical SNR Cassiopeia A (Cas A) one most promising target for UHE observations. This...
The nearby radio galaxy M87 is a very-high-energy (VHE) gamma-ray emitter established by observations with ground-based detectors. Here we report the long-term monitoring of from 2021 to 2024 Large High Altitude Air Shower Observatory (LHAASO). has been detected LHAASO statistical significance $\sim 9\sigma$. observed energy spectrum extends 20 TeV, possible hardening at 20$ TeV and then clear softening higher energies. Assuming that intrinsic described single power law up tight upper bound...
The highest energy gamma-rays from gamma-ray bursts (GRBs) have important implications for their radiation mechanism. Here we report the first time detection of up to 13 TeV brightest GRB 221009A by Large High Altitude Air-shower Observatory (LHAASO). LHAASO-KM2A detector registered more than 140 with energies above 3 during 230$-$900s after trigger. intrinsic spectrum can be described a power-law correcting extragalactic background light (EBL) absorption. Such hard challenges synchrotron...
Boolean satisfiability problem (SAT) is now widely applied in differential cryptanalysis and linear for various cipher algorithms. It generated many excellent results some ciphers, example, Salsa20. In this research, we study the propagations through operations of addition, rotation XOR (ARX), construct SAT models. We apply models to CRAX search trails automatically. sense, our contribution can be broadly divided into two parts. give bounds Alzette both up 12 steps, by which present a...
The first source catalog of Large High Altitude Air Shower Observatory reported the detection a very-high-energy gamma ray source, 1LHAASO J1219+2915. In this paper further detailed study spectral and temporal behavior point-like have been carried. best-fit position TeV ($\rm{RA}=185.05^{\circ}\pm0.04^{\circ}$, $\rm{Dec}=29.25^{\circ}\pm0.03^{\circ}$) is compatible with NGC 4278 within $\sim0.03$ degree. Variation analysis shows an indication variability at few months level in band, which...
The KM2A is the largest sub-array of Large High Altitude Air Shower Observatory (LHAASO). It consists 5216 electromagnetic particle detectors (EDs) and 1188 muon (MDs). data recorded by EDs MDs are used to reconstruct primary information cosmic ray gamma-ray showers. This for physical analysis in astronomy physics. To ensure reliability LHAASO-KM2A data, a three-level quality control system has been established. monitor status detector units, stability reconstructed parameters performance...
The attenuation length of the muon content in extensive air showers provides important information regarding generation and development showers. This can be used not only to improve description such but also test fundamental models hadronic interactions. Using data from LHAASO-KM2A experiment, high-energy was studied. measured experimental energy range 0.3 30 PeV using constant intensity cut method. By comparing with predictions interaction (QGSJET-II-04, SIBYLL 2.3d, EPOS-LHC), it is...
The Water Cherenkov Detector Array (WCDA) is one of the components Large High Altitude Air Shower Observatory (LHAASO) and can monitor any sources over two-thirds sky for up to 7 hours per day with >98\% duty cycle. In this work, we report detection two outbursts Fanaroff-Riley I radio galaxy NGC 1275 that were detected by LHAASO-WCDA between November 2022 January 2023 statistical significance 5.2~$\sigma$ 8.3~$\sigma$. observed spectral energy distribution in range from 500 GeV 3 TeV fitted...