53 research outputs found
Tunable and precise two-bunch generation at FLASHForward
Beam-driven plasma-wakefield acceleration based on external injection has the
potential to significantly reduce the size of future accelerators. Stability
and quality of the acceleration process substantially depends on the incoming
bunch parameters. Precise control of the current profile is essential for
optimising energy-transfer efficiency and preserving energy spread. At the
FLASHForward facility, driver--witness bunch pairs of adjustable bunch length
and separation are generated by a set of collimators in a dispersive section,
which enables fs-level control of the longitudinal bunch profile. The design of
the collimator apparatus and its commissioning is presented.Comment: 7 pages, 5 figures, to be published in the proceedings of the 4th
European Advanced Accelerator Concepts Workshop, 15-21 September 2019, La
Biodola Bay, Isola d'Elba, Ital
Overview of Plasma Lens Experiments and Recent Results at SPARC_LAB
Beam injection and extraction from a plasma module is still one of the
crucial aspects to solve in order to produce high quality electron beams with a
plasma accelerator. Proper matching conditions require to focus the incoming
high brightness beam down to few microns size and to capture a high divergent
beam at the exit without loss of beam quality. Plasma-based lenses have proven
to provide focusing gradients of the order of kT/m with radially symmetric
focusing thus promising compact and affordable alternative to permanent magnets
in the design of transport lines. In this paper an overview of recent
experiments and future perspectives of plasma lenses is reported
The FLASHForward Facility at DESY
The FLASHForward project at DESY is a pioneering plasma-wakefield
acceleration experiment that aims to produce, in a few centimetres of ionised
hydrogen, beams with energy of order GeV that are of quality sufficient to be
used in a free-electron laser. The plasma wave will be driven by high-current
density electron beams from the FLASH linear accelerator and will explore both
external and internal witness-beam injection techniques. The plasma is created
by ionising a gas in a gas cell with a multi-TW laser system, which can also be
used to provide optical diagnostics of the plasma and electron beams due to the
<30 fs synchronisation between the laser and the driving electron beam. The
operation parameters of the experiment are discussed, as well as the scientific
program.Comment: 19 pages, 9 figure
A high transformer ratio scheme for PITZ PWFA experiments
In the field of plasma wakefield acceleration (PWFA) sig-nificant progress has been made throughout the recent years.However, an important issue in building plasma based ac-celerators that provide particle bunches suitable for userapplications will be a high transformer ratio, i.e. the ra-tio between maximum accelerating field in the witness andmaximum decelerating fields in the driver bunch. The trans-former ratio for symmetrical bunches in an overdense plasmais naturally limited to 2. Theory and simulations show thatthis limit can be exceeded using asymmetrical bunches. Ex-perimentally this was proven in RF-structures, but not inPWFA. To study transformer ratios above this limit in thelinear regime of a plasma wake, an experimental schemetailored to the unique capabilities of the Photoinjector TestFacility at DESY Zeuthen site (PITZ), a 25-MeV electronaccelerator, is being investigated. The numerical simula-tions of beam transport and plasma wakefields, as well aspreparatory studies on the photocathode laser system andplasma sources are presented
Eupraxia, a step toward a plasma-wakefield based accelerator with high beam quality
The EuPRAXIA project aims at designing the world's first accelerator based on advanced plasma-wakefield techniques to deliver 5 GeV electron beams that simultaneously have high charge, low emittance and low energy spread, which are required for applications by future user communities. Meeting this challenging objective will only be possible through dedicated effort. Many injection/acceleration schemes and techniques have been explored by means of thorough simulations in more than ten European research institutes. This enables selection of the most appropriate methods for solving each particular problem. The specific challenge of generating, extracting and transporting high charge beams, while maintaining the high quality needed for user applications, are being tackled using innovative approaches. This article highlights preliminary results obtained by the EuPRAXIA collaboration, which also exhibit the required laser and plasma parameters
Status of the Horizon 2020 EuPRAXIA conceptual design study
The Horizon 2020 project EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is producing a conceptual design report for a highly compact and cost-effective European facility with multi-GeV electron beams accelerated using plasmas. EuPRAXIA will be set up as a distributed Open Innovation platform with two construction sites, one with a focus on beam-driven plasma acceleration (PWFA) and another site with a focus on laser-driven plasma acceleration (LWFA). User areas at both sites will provide access to free-electron laser pilot experiments, positron generation and acceleration, compact radiation sources, and test beams for high-energy physics detector development. Support centres in four different countries will complement the pan-European implementation of this infrastructure
Status of the Horizon 2020 EuPRAXIA conceptual design study
The Horizon 2020 project EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is producing a conceptual design report for a highly compact and cost-effective European facility with multi-GeV electron beams accelerated using plasmas. EuPRAXIA will be set up as a distributed Open Innovation platform with two construction sites, one with a focus on beam-driven plasma acceleration (PWFA) and another site with a focus on laser-driven plasma acceleration (LWFA). User areas at both sites will provide access to free-electron laser pilot experiments, positron generation and acceleration, compact radiation sources, and test beams for high-energy physics detector development. Support centres in four different countries will complement the pan-European implementation of this infrastructure
Horizon 2020 EuPRAXIA design study
The Horizon 2020 Project EuPRAXIA ("European Plasma Research Accelerator with eXcellence In Applications") is preparing a conceptual design report of a highly compact and cost-effective European facility with multi-GeV electron beams using plasma as the acceleration medium. The accelerator facility will be based on a laser and/or a beam driven plasma acceleration approach and will be used for photon science, high-energy physics (HEP) detector tests, and other applications such as compact X-ray sources for medical imaging or material processing. EuPRAXIA started in November 2015 and will deliver the design report in October 2019. EuPRAXIA aims to be included on the ESFRI roadmap in 2020
EuPRAXIA - A compact, cost-efficient particle and radiation source
Plasma accelerators present one of the most suitable candidates for the development of more compact particle acceleration technologies, yet they still lag behind radiofrequency (RF)-based devices when it comes to beam quality, control, stability and power efficiency. The Horizon 2020-funded project EuPRAXIA ("European Plasma Research Accelerator with eXcellence In Applications") aims to overcome the first three of these hurdles by developing a conceptual design for a first international user facility based on plasma acceleration. In this paper we report on the main features, simulation studies and potential applications of this future research infrastructure
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