Potential applications of the dielectric wakefield accelerators in the SINBAD facility at DESY

Nie, Yuancun; Assmann, R.; Dorda, U.; Marchetti, Barbara; Weikum, Maria; Zhu, Jinying; Hüning, M.

doi:10.1016/j.nima.2016.01.038

Cited by 7 publications

(6 citation statements)

References 27 publications

(4 reference statements)

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“…The thin dielectric layer of δ = 25 µm was chosen to achieve the experimental aim of short pulse, tunable THz output. Additionally other simulation studies have shown that thin dielectric layers can be used when coupling to short electron pulses, for example those from laser wakefield accelerated bunches [22,23].…”

Section: Dlw Designmentioning

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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Section: Dlw Designmentioning

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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show abstract

“…As previously studied in [21], the DLW structure has the potential to serve as a dechirper to compensate the positive energy chirp of a LWFA-accelerated bunch, in which the electrons in the bunch head have lower energy than those in the tail. In this paper, we report detailed numerical simulations of an energy dechirper that is based on a rectangular (slab-symmetric) DLW structure, with the help of the CST Wakefield Solver and PIC Solver [26].…”

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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“…Dielectric wakefield acceleration (DWA) in planar and circular dielectric structures has seen major developments in understanding the maximum achievable accelerating gradients [1], dielectric breakdown limits [2] as well as applications for beam compression [3], modulation [4] and correlated energy spread compensation [5]. Extremely compact DWA-based accelerators have the potential to drive the next generation of free electron lasers and linear colliders [6,7].…”

Section: Introductionmentioning

confidence: 99%

Driver-witness electron beam acceleration in dielectric mm-scale capillaries

Lekomtsev

Aryshev

Tishchenko

et al. 2018

Phys. Rev. Accel. Beams

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We investigated a corrugated mm-scale capillary as a compact accelerating structure in the driverwitness acceleration scheme, and suggested a methodology to measure the acceleration of the witness bunch. The accelerating fields produced by the driver bunch and the energy spread of the witness bunch in a corrugated capillary and in a capillary with a constant inner radius were measured and simulated for both on-axis and off-axis beam propagation. Our simulations predicted a change in the accelerating field structure for the corrugated capillary. Also, an approximately twofold increase of the witness bunch energy gain on the first accelerating cycle was expected for both capillaries for the off-axis beam propagation. These results were confirmed in the experiment, and the maximum measured acceleration of 170 keV=m at 20 pC driver beam charge was achieved for off-axis beam propagation. The driver bunch showed an increase in energy spread of up to 11%, depending on the capillary geometry and beam propagation, with a suppression of the longitudinal energy spread in the witness bunch of up to 15%.

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Potential applications of the dielectric wakefield accelerators in the SINBAD facility at DESY

Abstract: Short, high-brightness relativistic electron bunches can drive ultra-high wakefields in the dielectric 7 wakefield accelerators (DWFAs). This effect can be used to generate high power THz coherent Cherenkov

Cited by 7 publications

References 27 publications

Simulation studies for dielectric wakefield programme at CLARA facility

Simulation studies for dielectric wakefield programme at CLARA facility

Simulations of an energy dechirper based on dielectric lined waveguides

Driver-witness electron beam acceleration in dielectric mm-scale capillaries

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