Plasma wakefield acceleration at CLARA facility in Daresbury Laboratory

Xia, Guoxing; Nie, Yuancun; Mete, Ö.; Hanahoe, Kieran; Dover, M.; Wigram, M.; Wright, J.F.; Zhang, J.; Smith, Jonathan; Pacey, Thomas; Li, Y.; Wei, Yelong; Welsch, Carsten

doi:10.1016/j.nima.2016.01.007

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…Such electron bunches can be obtained via laser wakefield acceleration. [82][83][84][85] To ensure that the electron beam is initially outside of the laser pulse, we have t shift =2 ¼ 4r s ¼ 4s= ffiffiffiffiffiffiffiffiffiffi 2 ln 2 p % 34 T 0 . In the laser pulse, the intensity sensed by electrons changes in real time and is strongest at t % 35 T 0 , which is larger than t shift =2 % 34 T 0 due to the electron beam with a certain length, and copious c rays are radiated at t % 35 T 0 [see Fig.…”

Section: B Numerical Analysis Of Manipulation Of C-ray Polarizationmentioning

confidence: 99%

Manipulation of γ-ray polarization in Compton scattering

Wang,

Ababekri,

Wan

et al. 2024

Physics of Plasmas

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High-brilliance high-polarization γ rays based on Compton scattering are of great significance in broad areas, such as nuclear physics, high-energy physics, astrophysics, etc. However, the transfer mechanism of spin angular momentum in the transition from linear through weakly into strongly nonlinear processes is still unclear, which severely limits the simultaneous control of brilliance and polarization of high-energy γ rays. In this work, we clarify the transfer mechanism in the transition regions and put forward a clear way to efficiently manipulate the polarization of emitted photons. We find that to simultaneously generate high-energy, high-brilliance, and high-polarization γ rays, it is better to increase the laser intensity for the initially spin-polarized electron beam. However, for the case of employing the initially spin-nonpolarized electron beam, in addition to increasing laser intensity, it is also necessary to increase the energy of the electron beam. Because the γ photon polarization emitted through the single-photon absorption channel is mainly attributed to the spin transfer of laser photons, while in multi-photon absorption channels, the electron spin plays a major role. Moreover, we confirm that the signature of γ-ray polarization can be applied to observing the nonlinear effects (multi-photon absorption) of Compton scattering with moderate-intensity laser facilities.

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Section: B Numerical Analysis Of Manipulation Of C-ray Polarizationmentioning

confidence: 99%

Manipulation of γ-ray polarization in Compton scattering

Wang,

Ababekri,

Wan

et al. 2024

Physics of Plasmas

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“…This facility aims for developing novel FEL concepts and will also host a diverse exploitation programme providing electron beams with up to 250 MeV beam energy, bunch charges of 250 pC and sub-ps bunch lengths. These beam parameters are sufficient for research of novel acceleration concepts including, for example, plasma wakefield acceleration [17]. CLARA Front End (-FE) has been recently constructed that can deliver the beams with 40-50 MeV beam energies.…”

Section: Introductionmentioning

confidence: 99%

Simulation studies for dielectric wakefield programme at CLARA facility

Pacey

Saveliev

Xia

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Short, high charge electron bunches can drive high magnitude electric fields in dielectric lined structures. The interaction of the electron bunch with this field has several applications including high gradient dielectric wakefield acceleration (DWA) and passive beam manipulation. The simulations presented provide a prelude to the commencement of an experimental DWA programme at the CLARA accelerator at Daresbury Laboratory. The key goals of this program are: tunable generation of THz radiation, understanding of the impact of transverse wakes, and design of a dechirper for the CLARA FEL. Computations of longitudinal and transverse phase space evolution were made with Impact-T and VSim to support both of these goals.

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“…These facilities can generally provide electron beams with a broad range of bunch parameters and time structures depending on operating mode. In Table 1, beam parameters are listed for CLARA (ultra-short pulse) [19] and state-of-art LWFA (laser plasma wakefield accelerator) [23][24][25]. Note that these parameters are not simultaneously achievable and are subject to be upgraded.…”

Section: Introductionmentioning

confidence: 99%

“…The DLWs have been widely studied both theoretically and experimentally making use of the AWA facility at ANL [11,12], the ATF facility at BNL [13,14], and the FACET facility at SLAC [15,16]. There are many other dedicated facilities being constructed or planned to study advanced electron accelerator concepts including the DLWs, for example, CLEAR at CERN [17,18], CLARA in Daresbury Laboratory [19], SINBAD at DESY [20,21], SPARC_LAB at INFN [17,22], etc. These facilities can generally provide electron beams with a broad range of bunch parameters and time structures depending on operating mode.…”

Section: Introductionmentioning

confidence: 99%

Simulations of an energy dechirper based on dielectric lined waveguides

Nie

Xia

Pacey

2018

Nuclear Instruments and Methods in Physics Research Section A:

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Terahertz frequency wakefields can be excited by ultra-short relativistic electron bunches travelling through dielectric lined waveguide (DLW) structures. These wakefields can either accelerate a witness bunch with high gradient, or modulate the energy of the driving bunch. In this paper, we study a passive dechirper based on the DLW to compensate the correlated energy spread of the bunches accelerated by the laser plasma wakefield accelerator (LWFA). A rectangular waveguide structure was employed taking advantage of its continuously tunable gap during operation. The assumed 200 MeV driving bunch had a Gaussian distribution with a bunch length of 3.0 µm, a relative correlated energy spread of 1%, and a total charge of 10 pC. Both of the CST Wakefield Solver and PIC Solver were used to simulate and optimize such a dechirper. Effect of the time-dependent self-wake on the driving bunch was analyzed in terms of the energy modulation and the transverse phase space.

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Plasma wakefield acceleration at CLARA facility in Daresbury Laboratory

Cited by 5 publications

References 31 publications

Manipulation of γ-ray polarization in Compton scattering

Manipulation of γ-ray polarization in Compton scattering

Simulation studies for dielectric wakefield programme at CLARA facility

Simulations of an energy dechirper based on dielectric lined waveguides

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