Nm-sized cryogenic hydrogen clusters for a laser-driven proton source

Grieser, S.; Aurand, B.; Aktan, E.; Bonaventura, D.; Büscher, M.; Cerchez, M.; Engin, Ilhan; Lessmann, Lukas; Mannweiler, Christian; Prasad, R.; Willi, O.; Khoukaz, A.

doi:10.1063/1.5080011

Cited by 16 publications

(14 citation statements)

References 35 publications

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“…Following the basic principle, as presented in Grieser et al [24], purified hydrogen is used. It is pre-cooled to temperatures (T) as low as 24 K by using a closed-looped helium cold-head and expanded with a backing pressure (p) up to 16 bar through a de-Laval nozzle.…”

Section: Setupmentioning

confidence: 99%

“…We applied the method of Mie-scattering as described in [24], deducing the cluster/particle size by characterising the angular dependent scattering of light from the cluster jet for different incident polarisations. For the Mie-measurement, the scattering signal increases nonlinearly with the particle size, which indicates, that due to the above mentioned log-normal distribution of particles, the measured size might be higher than the calculated average size.…”

Section: Setupmentioning

confidence: 99%

“…Proton cut-off energy depending on the (a) temperature of the cluster-jet source at a fixed pressure of p=16 bar, and (b) backing pressure of the cluster-jet source for fixed temperatures. The measurement at 42 K was recorded during another experimental campaign with the cluster jet source reported in [23,24].…”

Section: Variation Of the Laser Parametersmentioning

confidence: 99%

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Study of the parameter dependence of laser-accelerated protons from a hydrogen cluster source

et al. 2020

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We present a study on laser-driven proton acceleration from a hydrogen cluster target. Aiming for the optimisation of the proton source, we performed a detailed parametric scan of the interaction conditions by varying different laser and the target parameters. While the underlying process of a Coulomb-explosion delivers moderate energies, in the range of 100 s of keV, the use of hydrogen as target material comes with the benefit of a debris-free, single-species proton acceleration scheme, enabling high repetition-rate experiments, which are very robust against shot-to-shot fluctuations. OPEN ACCESS RECEIVED

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Section: Setupmentioning

confidence: 99%

Section: Setupmentioning

confidence: 99%

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Study of the parameter dependence of laser-accelerated protons from a hydrogen cluster source

et al. 2020

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“…As a reference, cluster sizes for argon and hydrogen gas jets were studied for different geometries in [5,7] finding cluster radii between 8 nm and 20 nm for backing pressures between 12 bar and 16 bar.…”

Section: A Simulation Parametersmentioning

confidence: 99%

“…Cluster plasmas are produced when atomic structures which were formerly held together by van der Waals forces are ionized within a short amount of time. The clusterization process in high pressure gas jets was described and characterized in [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear wakefields and electron injection in cluster plasma

Mayr

Spiers

Aboushelbaya

et al. 2020

Phys. Rev. Accel. Beams

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Laser and beam driven wakefields promise orders of magnitude increases in electric field gradients for particle accelerators for future applications. Key areas to explore include the emittance properties of the generated beams and overcoming the dephasing limit in the plasma. In this paper, the first in-depth study of the self-injection mechanism into wakefield structures from nonhomogeneous cluster plasmas is provided using high-resolution two dimensional particle-in-cell simulations. The clusters which are typical structures caused by ejection of gases from a high-pressure gas jet have a diameter much smaller than the laser wavelength. Conclusive evidence is provided for the underlying mechanism that leads to particle trapping, comparing uniform and cluster plasma cases. The accelerated electron beam properties are found to be tunable by changing the cluster parameters. The mechanism explains enhanced beam charge paired with large transverse momentum and energy which has implications for the betatron x-ray flux. Finally, the impact of clusters on the high-power laser propagation behavior is discussed.

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Different Average Size Evolution of Gaseous Water Cluster in an Expanding Gas Flow

Wang

Boldarev

et al. 2020

J Clust Sci

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Nm-sized cryogenic hydrogen clusters for a laser-driven proton source

Abstract: Magnetic field stabilization system for atomic physics experiments Review of Scientific Instruments 90, 044702 (2019);

Cited by 16 publications

References 35 publications

Study of the parameter dependence of laser-accelerated protons from a hydrogen cluster source

Study of the parameter dependence of laser-accelerated protons from a hydrogen cluster source

Nonlinear wakefields and electron injection in cluster plasma

Different Average Size Evolution of Gaseous Water Cluster in an Expanding Gas Flow

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