A5061401824- Laser-Plasma Interactions and Diagnostics
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Laser-induced spectroscopy and plasma
- Magnetic confinement fusion research
- Geophysical and Geoelectrical Methods
- Atomic and Molecular Physics
- Electrical and Bioimpedance Tomography
- High-pressure geophysics and materials
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Semiconductor materials and interfaces
- Plasma Diagnostics and Applications
- Advanced X-ray Imaging Techniques
- Astro and Planetary Science
- Laser-Matter Interactions and Applications
- Fusion materials and technologies
- Semiconductor materials and devices
- Radiation Therapy and Dosimetry
- Gamma-ray bursts and supernovae
- Diamond and Carbon-based Materials Research
- Surface and Thin Film Phenomena
- Flow Measurement and Analysis
- Pulsed Power Technology Applications
Sci-Tech Daresbury
2017-2019
University of Manchester
2005-2019
Cockcroft Institute
2016-2019
Chinese Academy of Sciences
2017
National Astronomical Observatories
2017
Yunnan Observatories
2012-2017
University of Oslo
2016
Manchester University
2016
Institute of Microelectronics
2012
University of Chinese Academy of Sciences
2012
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...
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)...
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here ready for systematic study of seeded self-modulation 400\,GeV proton bunch in 10\,m-long rubidium with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. short laser pulse used ionization vapor propagates all way along column, suggesting full vapor. occurs bunch, at time and follows affects bunch.
Context. Charged particles are accelerated to high energies in solar flares. Although we know that magnetic reconnection is an efficient mechanism generating energetic particles, the detailed role it plays accelerating still unknown.
In this article, we briefly summarize the experiments performed during first Run of Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal AWAKE 1 (2013 - 2018) was to demonstrate that \unit[10-20]{MeV} electrons can be accelerated GeV-energies in a plasma wakefield driven by highly-relativistic self-modulated proton bunch. We describe experiment, outline measurement concept and present results. Last, our plans future.
By means of a hollow plasma, multiple proton bunches work well in driving nonlinear plasma wakefields and accelerate electrons to the energy frontier with preserved beam quality. However, acceleration positrons is different because accelerating structure strongly charge dependent. There trade-off between keeping small normalized emittance spread. This results from conflict that electrons, used provide focusing bunches, dilute positron bunch. loading an extra electron bunch repel meanwhile...
Plasma-based deceleration could greatly improve the overall compactness of accelerator facilities.In so-called passive plasma beam dump, collective oscillations electrons are used to absorb kinetic energy spent high-energy electron beams.Moreover, due high-amplitude decelerating gradient and low-density medium, is achieved in a compact safer way, if compared conventional dumps.Adoption this novel scheme might be critical for facilities aiming high-energy, high-repetition-rates, as well...
Proton-driven plasma wakefield acceleration has been demonstrated in simulations to be capable of accelerating particles the energy frontier a single stage, but its potential is hindered by fact that currently available proton bunches are orders magnitude longer than wavelength. Fortunately, micro-bunching allows driving waves resonantly. In this paper, we propose using hollow channel for multiple bunch driven and demonstrate it enables operation nonlinear regime resonant excitation strong...
A plasma beam dump uses the collective oscillations of electrons to absorb kinetic energy a particle beam. In this paper, modified passive scheme is proposed using either gradient or stepped profile maintain higher decelerating compared with uniform plasma. The improvement result wavelength change preventing re-acceleration low particles. Particle-in-cell simulation results show that both and profiles can achieve improved loss for an electron bunch parameters routinely achieved in laser...
Electrical capacitance tomography (ECT) is an effective technique for elucidating the distribution of dielectric materials inside closed pipes or vessels. This paper describes a virtual electrical (VECT) system, which can simulate range sensor and hardware configurations material distributions. A selection popular image reconstruction algorithms has been made available error tools enable their performance to be evaluated compared. Series frame-by-frame results stored simulating real-time...
By using intense laser irradiating a micro plane target obliquely, an enhanced γ-ray source is generated.Due to the superposition of incident and reflected pulses, electron bunches with density ∼ 300n c are extracted accelerated.When these separate from edge that leaving, they co-propagate field emit dense γ-rays simultaneously.Simulation results show emitted γ photons 253n averaged energy 12 MeV.The yield 7 × 10 , achieving high brightness 4 23 photons/s/mm 2 /mrad /0.1%BW.Influences...
Seeded Self-modulation (SSM) has been demonstrated to transform a long proton bunch into many equidistant micro-bunches (e.g., the AWAKE case), which then resonantly excite strong wakefields. However, wakefields in uniform plasma suffer from quick amplitude drop after reaching peak. This is caused by significant decrease of wake phase velocity during self-modulation. A large number protons slip out focusing and decelerating regions get lost, thus cannot contribute wakefield growth....
Plasma-based accelerators have achieved tremendous progress in the past few decades, thanks to advances of high power lasers and availability high-energy relativistic particle beams. However, electrons (or positrons) accelerated plasma wakefields are subject radiation losses, which generally suppress final energy gains In this paper, reaction plasma-based is investigated using test approach. Energy-frontier TeV colliders based on a multiple stage laser-driven wakefield accelerator...
Seeded Self-modulation (SSM) has been demonstrated to transform a long proton bunch into many equidistant micro-bunches (e.g., the AWAKE case), which then resonantly excite strong wakefields. However, wakefields in uniform plasma suffer from quick amplitude drop after reaching peak. This is caused by significant decrease of wake phase velocity during self-modulation. A large number protons slip out focusing and decelerating regions get lost, thus cannot contribute wakefield growth....