Guoxing Xia
A5009416708- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Atomic and Molecular Physics
- Nuclear physics research studies
- Gyrotron and Vacuum Electronics Research
- Laser-induced spectroscopy and plasma
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Pulsed Power Technology Applications
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Radiation Therapy and Dosimetry
- Photocathodes and Microchannel Plates
- Carbon Nanotubes in Composites
- Astronomical and nuclear sciences
- High-pressure geophysics and materials
- Advanced Surface Polishing Techniques
- Solar and Space Plasma Dynamics
- Diamond and Carbon-based Materials Research
- Dust and Plasma Wave Phenomena
- Lightning and Electromagnetic Phenomena
Cockcroft Institute
2016-2025
University of Manchester
2016-2025
Sci-Tech Daresbury
2013-2025
Roche (China)
2025
Chinese Academy of Sciences
2014-2024
Huizhou University
2018-2024
Institute of Modern Physics
2013-2024
University of Chinese Academy of Sciences
2020-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2024
University of Liverpool
2020-2023
High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase or reduce size accelerator, new acceleration schemes need be developed. Plasma wakefield acceleration, which electrons plasma are excited, leading strong electric fields, is one such promising novel technique. Pioneering experiments shown an intense laser pulse electron bunch traversing plasma, drives fields 10s...
Mass excesses of short-lived $A=2Z\ensuremath{-}1$ nuclei $^{63}\mathrm{Ge}$, $^{65}\mathrm{As}$, $^{67}\mathrm{Se}$, and $^{71}\mathrm{Kr}$ have been directly measured to be $\ensuremath{-}46\text{ }921(37)$, }937(85)$, }580(67)$, }320(141)\text{ }\text{ }\mathrm{keV}$, respectively. The deduced proton separation energy $\ensuremath{-}90(85)\text{ }\mathrm{keV}$ for $^{65}\mathrm{As}$ shows that this nucleus is only slightly unbound. X-ray burst model calculations with the new mass excess...
Isochronous mass spectrometry has been applied to neutron-deficient $^{58}\mathrm{Ni}$ projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series short-lived ${T}_{z}=\ensuremath{-}3/2$ nuclides including $^{41}\mathrm{Ti}$, $^{45}\mathrm{Cr}$, $^{49}\mathrm{Fe}$, and $^{53}\mathrm{Ni}$ have measured with precision 20--40 keV. The new data enable us test for first time isobaric multiplet equation (IMME) $fp$-shell nuclei. We observe that IMME is inconsistent...
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment CERN the world׳s first experiment. AWAKE will be installed in former CNGS facility uses 400 GeV/c beam bunches from SPS. experiments focus on self-modulation instability of long (rms ~12 cm) bunch plasma. These are planned for end 2016. Later, 2017/2018, low energy (~15 MeV)...
Masses of neutron-deficient 58Ni projectile fragments have been measured at the HIRFL-CSR facility in Lanzhou, China employing isochronous mass spectrometry technique. a series short-lived Tz = −3/2 nuclides including 45Cr nucleus with relative uncertainty about 10−6–10−7. The new turned out to be essential for modeling astrophysical rp-process. In particular, we find that formation predicted Ca–Sc cycle X-ray bursts can excluded.
New acceleration technology is mandatory for the future elucidation of fundamental particles and their interactions. A promising approach to exploit properties plasmas. Past research has focused on creating large-amplitude plasma waves by injecting an intense laser pulse or electron bunch into plasma. However, maximum energy gain electrons accelerated in a single stage limited driver. Proton bunches are most drivers wakefields accelerate TeV scale stage. An experimental program at CERN—the...
We show in experiments that a long, underdense, relativistic proton bunch propagating plasma undergoes the oblique instability, which we observe as filamentation. determine threshold value for ratio between transverse size and skin depth instability to occur. At threshold, outcome of experiment alternates filamentation self-modulation (evidenced by longitudinal modulation into microbunches). Time-resolved images density distribution reveal grows an observable level late along bunch,...
The interaction of fast charged particles with graphene layers can generate electromagnetic modes. This wake effect has been recently proposed for short-wavelength, high-gradient particle acceleration and obtaining brilliant radiation sources. In this study, the excitation wakefields produced by a point-like moving parallel to multilayer array (which may be supported an insulated substrate) is studied using linearized hydrodynamic theory. General expressions excited longitudinal transverse...
In quantum-degenerate metallic carbon nanotubes (CNTs), the conduction electron gas forms a solid-state plasma environment where collective dynamics are dominant. This dense is capable of supporting excitation surface plasmon on CNT surface. this study, we demonstrate new class microscale relativistic plasmons (RSPs) that, independent laser polarisation and matching medium, can be directly excited by paraxial propagation high-intensity optical pulse through cylindrical vacuum channel...
While laser wakefield acceleration (LWFA) in the bubble regime demands ultra-short, high-peak-power pulses, operation self-modulated (SM-LWFA) works with more relaxed pulse conditions, albeit at cost of lower beam quality. Modern systems can deliver few-terawatt pulses tens femtoseconds kilohertz repetition rates. These are well-suited for developing SM-LWFA applications where high average energy and charge prioritized over Such beams could be used to generate high-energy bremsstrahlung...
Revolution frequency measurements of individual ions in storage rings require sophisticated timing detectors. One common approaches for such detectors is the detection secondary electrons released from a thin foil due to penetration stored ions. A new method based on analysis intensities was developed which enables determination charge each ion simultaneously with measurement its revolution frequency. Although mass-over-charge ratios 51Co27+ and 34Ar18+ are almost identical, therefore,...
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. The use high energy protons drive wakefields in plasma has been demonstrated during Run 1 AWAKE programme at CERN. Protons 400 GeV drove that accelerated electrons 2 under 10 m plasma. collaboration now embarking on with main aims demonstrate stable accelerating gradients 0.5–1 GV/m, preserve emittance electron bunches and develop sources scalable 100s metres beyond. By end 2, scheme should...
Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven short, misaligned preceding bunch. Hosing develops the plane misalignment, self-modulation perpendicular plane, at frequencies close to electron frequency, and are reproducible. Development depends on misalignment direction, its growth extent proton charge. Results have main characteristics theoretical model, relevant other plasma-based accelerators represent first characterization...
Wakefield wavelengths associated with solid-state plasmas greatly limit the accelerating length. An alternative approach employs 2D carbon-based nanomaterials, like graphene or carbon nanotubes (CNTs), configured into structured targets. These nanostructures are designed voids low-density regions to effectively reduce overall plasma density. This reduction enables use of longer-wavelength lasers and also extends wavelength acceleration In this study, we present, our knowledge, first...
Solid-state materials, such as carbon nanotubes (CNTs), have the potential to support ultra-high accelerating fields in TV/m range for charged particle acceleration. In this study, we explore feasibility of using nanostructured CNTs forest develop plasma-based accelerators at 100s TeV-level, driven by high-density, ultra-relativistic electron beams, fully three-dimensional particle-in-cell simulations. Two different acceleration mechanisms are proposed and investigated: surface plasmon...
This paper presents the design and experimental commissioning of a noninvasive electron bunch length monitor based on detection coherent Cherenkov diffraction radiation (ChDR). The measurement technique effectively eliminates influence bunch-by-bunch charge fluctuations, as each detector measures signal from same while mitigating impact position jitter measurements, providing potential real-time diagnostic tool with significant operational advantages. sensitivity measurements to both...
Abstract Recent nanotechnology advances enable fabrication of layered structures with controllable inter-layer gap, giving the ultra-violet (UV) lasers access to solid-state plasmas which can be used as medium for electron acceleration. By using a linearly polarized 3 fs-long laser pulse 100 nm wavelength and 10 $$^{21}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>21</mml:mn> </mml:msup> </mml:math> W/cm $$^2$$ <mml:mn>2</mml:mn> peak intensity,...