A5110728491- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Solid-state spectroscopy and crystallography
- Particle Detector Development and Performance
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Muon and positron interactions and applications
- Structural Load-Bearing Analysis
- Gyrotron and Vacuum Electronics Research
- Fatigue and fracture mechanics
- Railway Engineering and Dynamics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
Chinese Academy of Sciences
2021-2024
Institute of High Energy Physics
2019-2024
Shanghai Jiao Tong University
2021
University of Chinese Academy of Sciences
2020
Shandong Normal University
2020
Beijing Jiaotong University
2010
The world’s first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (rf) cavities treated by medium-temperature furnace baking (mid-T bake) was developed at the Institute of High Energy Physics, Chinese Academy Sciences. in achieved an unprecedented high average intrinsic quality factor (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mi>Q</a:mi><a:mn>0</a:mn></a:msub></a:mrow></a:math>) <c:math...
We present an improved measurement of the standard model CP violation parameter sin2phi_1 (also known as sin2beta) based on a sample 85 times 10^6 B Bbar pairs collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric-energy e+e- collider. One neutral meson is reconstructed in J/psi K_S, psi(2S) chi_{c1} eta_c K^{*0}, or K_L CP-eigenstate decay channel and flavor accompanying identified from itsdecay products. From asymmetry distribution time intervals between two points, we...
The four decay modes $D^{0}\to\phi\pi^{0}$, $D^{0}\to\phi\eta$, $D^{+}\to\phi\pi^{+}$, and $D^{+}\to\phi K^{+}$ are studied by using a data sample taken at the centre-of-mass energy $\sqrt{s} = 3.773$~GeV~with BESIII detector, corresponding to an integrated luminosity of 2.93 fb$^{-1}$. branching fractions first three measured be ${\cal B}(D^{0}\to\phi\pi^{0})=(1.168\pm0.028\pm0.028)\times10^{-3}$, B}(D^{0}\to\phi\eta)=(1.81\pm0.46\pm0.06)\times10^{-4}$,...
Abstract In the Conceptual Design Report (CDR) stage of Circular Electron and Positron Collider (CEPC), injection energy Booster is 10 GeV minimal working field dipole magnets only 29 G, with iron cores could not meet requirement precision due to remnant field. CEPC Technical (TDR) stage, increased 30 raised 95 G so that influence becomes relatively small, core can be used for Booster. this paper, technical design described, development test a full scale prototype pure magnet are presented.
We report a search for the flavor-changing neutral current decay $B \to X_{s} \ell^{+} \ell^{-}$ using 29.5 fb$^{-1}$ data sample accumulated at $Υ(4S)$ resonance with Belle detector KEKB $e^{+}e^{-}$ storage ring. observe evidence $B\to Kμ^+μ^-$ and preliminary branching fraction of ${\cal B}(B K μ^{+} μ^{-}) = (0.99^{+0.39}_{-0.32}^{+0.13}_{-0.15}) \times 10^{-6}$. also set following 90% confidence level upper limits on fractions exclusive inclusive decays, e^{+} e^{-}) < 1.2 10^{-6}$,...
The CEPC booster will accelerate the [Formula: see text] beam from 10 GeV to 120 GeV, so field of dipole magnets change with energy, which minimal working is 29 Gs whereas maximal 338 Gs. To reach requirement high precision at lower level, three kinds new are proposed and studied. test verify designs magnets, two subscale prototype fabricated.
The operation of 20,000-ton heavy haul freight cars on Datong-Qinhuangdao Railway has played a very important role the economic development China, and at same time it caused serious damage to couplers coupler yokes cars, threatening traffic safety. In this paper, taking cracks yoke into account, stress intensity factors (SIF) for different crack sizes are calculated using approach 1/4 node displacement sub-model techniques. commercial finite element code ABAQUS is used modeling 3-D prismatic...
96 Tesla type 1.3GHz 9-cell superconducting cavities, housed in eight 12m-long cryomodules, will be adopted for CEPC booster. Each cavity equips with one variable coupling, double-window fundamental power coupler (FPC). The FPC operate at RF up to 20 kW quasi-CW mode. A coupling from 4·10⁶ 10⁷ is required meet different operation modes of Higgs, W and Z. new that employs a 50 Ω coaxial line bellow structures, cylindrical warm window, planar cold window adjusting actuator has been designed....
Using a data sample of $4.481\times 10^8 ψ^\prime$ events collected with the BESIII detector, we report first observation four-lepton-decays $J/ψ\to e^+e^-e^+e^-$ and e^+e^-μ^+μ^-$ utilizing process $ψ^\prime\to π^+π^- J/ψ$. The branching fractions are determined to be $[5.48\pm0.31~(\rm stat)\pm0.45~(\rm syst)]\times 10^{-5}$ $[3.53~\pm0.22~(\rm stat)\pm0.13~(\rm 10^{-5}$, respectively. results consistent theoretical predictions. No significant signal is observed for μ^+μ^-μ^+μ^-$, an upper...
World's first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (RF) cavities treated by medium-temperature furnace baking (mid-T bake) was developed, assembled and tested at IHEP for the Dalian Advanced Light Source (DALS) CEPC R&D. The in achieved an unprecedented highest average Q0 of 3.8E10 16 MV/m 3.6E10 21 horizontal test. can operate stably up to a total CW RF voltage greater than 191 MV, with cavity accelerating gradient more 23 MV/m. results significantly...