Excitation and Control of Plasma Wakefields by Multiple Laser Pulses

Cowley, J.; Thornton, C.; Arran, Christopher; Shalloo, R. J.; Corner, L.; Cheung, Gemmy; Gregory, C. D.; Mangles, Stuart; Matlis, Nicholas H.; Symes, D. R.; Walczak, R.; Hooker, S. M.

doi:10.1103/physrevlett.119.044802

Cited by 47 publications

(36 citation statements)

References 57 publications

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“…Very recently J. Cowley et al [40] reported on very encouraging results about the feasibility of their timeshaping setup, with the demonstration of efficient exci-tation of the plasma wave via Multi-Pulse LWFA. The REMPI scheme could be tested with two pulses in the train at first, with Nitrogen as a contaminant species.…”

Section: Discussionmentioning

confidence: 99%

The resonant multi-pulse ionization injection

et al. 2017

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The production of high-quality electron bunches in Laser Wake Field Acceleration relies on the possibility to inject ultra-low emittance bunches in the plasma wave. In this paper we present a new bunch injection scheme in which electrons extracted by ionization are trapped by a large-amplitude plasma wave driven by a train of resonant ultrashort pulses. In the REsonant Multi-Pulse Ionization (REMPI) injection scheme, the main portion of a single ultrashort (e.g Ti:Sa) laser system pulse is temporally shaped as a sequence of resonant sub-pulses, while a minor portion acts as an ionizing pulse. Simulations show that high-quality electron bunches with normalized emittance as low as 0.08 mm×mrad and 0.65% energy spread can be obtained with a single present-day 100TW-class Ti:Sa laser system.

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Section: Discussionmentioning

confidence: 99%

The resonant multi-pulse ionization injection

et al. 2017

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“…Inset: the ionizing pulse focusing is achieved by using a mirror with a hole for the driving pulse passage. pulses demonstrate that a multi pulse scheme is obtainable with present day technology and that plasma waves can be excited with this scheme [7]. Using Argon (Ar 8+ → Ar 9+ with ionization potential U I = 422.5 eV ) as a dopant gives us the possibility to obtain bunches with tens of nm×rad of normalized emittance.…”

Section: The Resonant Multi-pulse Ionization Injectionmentioning

confidence: 94%

High-quality GeV-scale electron bunches with the Resonant Multi-Pulse Ionization Injection

Tomassini

Nicola

Labate

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Recently a new injection scheme for Laser Wake Field Acceleration, employing a single 100-TW-class laser system, has been proposed. In the Resonant Multi-Pulse Ionization injection (ReMPI) a resonant train of pulses drives a large amplitude plasma wave that traps electrons extracted from the plasma by further ionization of a high-Z dopant (Argon in the present paper). While the pulses of the driver train have intensity below the threshold for the dopant's ionization, the properly delayed and frequency doubled (or more) ionization pulse possesses an electric field large enough to extract electrons, though its normalized amplitude is well below unity. In this paper we will report on numerical simulations results aimed at the generation of GeV-scale bunches with normalized emittance and rms energy below 80 nm × rad and 0.5 %, respectively. Analytical consideration of the FEL performance for a 1.3 GeV bunch will be also reported.

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“…To this purpose, a small fraction of the laser pulse is picked up and frequency doubled or tripled by a nonlinear crystal, while the most energetic fraction (almost 97% of the total energy, in the case being studied for EuPRAXIA) is shaped temporally as a sequence of sub-pulses. Over the past few years, a few optical schemes were proposed in order to produce a train of ultrashort pulses from a CPA TiSa chain [8][9][10]. However, in their proposed variants these schemes do not meet the two essential requisites for driving the ReMPI acceleration scheme within EuPRAXIA, namely a high efficiency (energy throughput into the pulse train) and reduced amplitude variations among the different pulses of the train.…”

Section: Options For Pulse Train Generationmentioning

confidence: 99%

Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

et al. 2019

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The purpose of the European project EuPRAXIA is to realize a novel plasma accelerator user facility. The laser driven approach sets requirements for a very high performance level for the laser system: pulse peak power in the petawatt range, pulse repetition rate of several tens of Hz, very high beam quality and overall stability of the system parameters, along with 24/7 operation availability for experiments. Only a few years ago these performances were considered unrealistic, but recent advances in laser technologies, in particular in the chirped pulse amplification (CPA) of ultrashort pulses and in high energy, high repetition rate pump lasers have changed this scenario. This paper discusses the conceptual design and the overall architecture of a laser system operating as the driver of a plasma acceleration facility for different applications. The laser consists of a multi-stage amplification chain based CPA Ti:Sapphire, using frequency doubled, diode laser pumped Nd or Yb solid state lasers as pump sources. Specific aspects related to the cooling strategy of the main amplifiers, the operation of pulse compressors at high average power, and the beam pointing diagnostics are addressed in detail.Laser Accelerator) [4], with an average power output of tens of watts. New systems under realization aim to even higher average power levels, such as HAPLS targeting an output power of 300 W. Nonetheless, to address user-level requirements, the average power of ultrafast lasers needs to increase by one or two orders of magnitude.The purpose of the European project EuPRAXIA [5] is to provide a conceptual design for a compact, user-oriented, plasma accelerator with superior beam quality to enable free electron laser operation in the X-ray range. User requirements for an operational facility imply a significant increase of the laser driver output parameters with respect to systems currently available or under development: pulse peak power in the petawatt range, pulse repetition rate of several tens of Hz, as well as very high beam quality and overall stability of the system parameters.A description of the architecture of the laser driver was already published in previous work [6], describing the main parameters and technical solutions. This paper complements the previous one by recalling the general lines of the system architecture and addressing some specific points that are particularly critical for the system operation at high average power levels. These aspects are related to the amplifier's geometrical layout, the cooling solution to address the operation at high average power levels, and the laser beam transport-related issues.

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Excitation and Control of Plasma Wakefields by Multiple Laser Pulses

Cited by 47 publications

References 57 publications

The resonant multi-pulse ionization injection

The resonant multi-pulse ionization injection

High-quality GeV-scale electron bunches with the Resonant Multi-Pulse Ionization Injection

Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

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