Gas-dynamic density downramp injection in a beam-driven plasma wakefield accelerator

Cabadağ, Jurjen Couperus; Pausch, Richard; Schöbel, Susanne; Bußmann, Michael; Chang, Yen-Yu; Corde, S.; Debus, A.; Ding, Hao; Döpp, A.; Foerster, F.; Gilljohann, Max; Haberstroh, Florian; Heinemann, Thomas; Hidding, B.; Karsch, Stefan; Koehler, Alexander; Kononenko, Olena; Knetsch, A.; Kurz, Thomas; Ossa, A. Martínez de la; Nutter, Alastair; Raj, Gaurav; Steiniger, Klaus; Schramm, U.; Ufer, Patrick; Irman, Arie

doi:10.1103/physrevresearch.3.l042005

Cited by 15 publications

(6 citation statements)

References 53 publications

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“…In parallel, the hybrid LWFA→ PWFA approach has been developed from concept [ 41 ] to an experimentally viable platform over the last decade, [ 42,43,110,111 ] and now is contributing to the forefront of PWFA R&D, with achieved milestones such as observation of ion motion via shadowgraphy, [ 42 ] first gas‐dynamic density downramp injection in PWFA, [ 44 ] and all‐optical shock front injection. [ 45 ] Among next milestones of this increasingly successful approach is plasma photocathode‐based electron beam production.…”

Section: Discussionmentioning

confidence: 99%

“…So far, the only linac in the world with sufficient electron beam current that could be used for PWFA and plasma photocathode realization was SLAC's Facility for Advanced Accelerator Experimental Tests FACET. While linacs such as FACET and FACET‐II will remain the gold standard for intense and reliable electron beam production at multi‐GeV for some time, hybrid plasma wakefield accelerators, which use the inherently high current electron beams from laser wakefield acceleration (LWFA) as drivers for PWFA, [ 41 ] are also increasingly successful, [ 42–45 ] and will vastly expand capacities for PWFA and plasma photocathode‐based electron beam production in the future. This means that there is a path for any laboratory that engages in state‐of‐the‐art LWFA to realize inherently synchronized plasma photocathodes.…”

Section: The Plasma Photocathodementioning

confidence: 99%

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Plasma Photocathodes

Habib,

Heinemann,

Manahan

et al. 2023

Annalen der Physik

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Plasma wakefield accelerators offer accelerating and focusing electric fields three to four orders of magnitude larger than state‐of‐the‐art radiofrequency cavity‐based accelerators. Plasma photocathodes can release ultracold electron populations within such plasma waves and thus open a path toward tunable production of well‐defined, compact electron beams with normalized emittance and brightness many orders of magnitude better than state‐of‐the‐art. Such beams will have far‐reaching impact for applications such as light sources, but also open up new vistas on high energy and high field physics. This paper reviews the innovation of plasma photocathodes, and reports on the experimental progress, challenges, and future prospects of the approach. Details of the proof‐of‐concept demonstration of a plasma photocathode in 90° geometry at SLAC FACET within the E‐210: Trojan Horse program are described. Using this experience, alongside theoretical and simulation‐supported advances, an outlook is given on future realizations of plasma photocathodes such as the upcoming E‐310: Trojan Horse‐II program at FACET‐II with prospects toward excellent witness beam parameter quality, tunability, and stability. Future installations of plasma photocathodes also at compact, hybrid plasma wakefield accelerators, will then boost capacities and open up novel capabilities for experiments at the forefront of interaction of high brightness electron and photon beams.

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Section: Discussionmentioning

confidence: 99%

Section: The Plasma Photocathodementioning

confidence: 99%

Plasma Photocathodes

Habib,

Heinemann,

Manahan

et al. 2023

Annalen der Physik

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“…2019), and flattop longitudinal bunch which models the LWFA produced driver beam (Couperus Cabadağ et al. 2021; Foerster et al. 2022).…”

Section: Downramp Injectionmentioning

confidence: 99%

“…2019; Couperus Cabadağ et al. 2021). Even though the electron-driven second stage cannot significantly surpass the performance of the first LWFA stage in terms of the total energy of the accelerated electrons, due to its stable nature it can serve as a ‘quality booster’ by generating bunches with improved properties (Martinez de la Ossa et al.…”

Section: Introductionmentioning

confidence: 99%

Beam current from downramp injection in electron-driven plasma wakefields

Hue,

Golovanov,

Tata

et al. 2023

J. Plasma Phys.

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We study the stability of plasma wake wave and the properties of density-downramp injection in an electron-driven plasma accelerator. In this accelerator type, a short high-current electron bunch (generated by a conventional accelerator or a laser–wakefield acceleration stage) drives a strongly nonlinear plasma wake wave (blowout), and accelerated electrons are injected into it using a sharp density transition which leads to the elongation of the wake. The accelerating structure remains highly stable until the moment some electrons of the driver reach almost zero energy, which corresponds to the best interaction length for optimal driver-to-plasma energy transfer efficiency. For a particular driver, this efficiency can be optimised by choosing appropriate plasma density. Studying the dependence of the current of the injected bunch on driver and plasma parameters, we show that it does not depend on the density downramp length as long as the condition for trapping is satisfied. Most importantly, we find that the current of the injected bunch primarily depends on just one parameter which combines both the properties of the driver (its current and duration) and the plasma density.

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“…Understanding the behavior of gas targets is crucial for a variety of applications, such as Laser Wakefield Acceleration (LWFA) 1,2 or table-top X-ray generation. 3,4 Gas cells or jets with different types of gases such as helium, nitrogen, argon or even dry air 5 with tailored density distributions, including density ramps 6 or shocks, are often used in these applications, 7 wherein their control and direct measurement are often desired. However, since the flows and internal turbulence of gases like argon and nitrogen are invisible to the naked eye, optical probing techniques, such as interferometry 8 , 9 shadowgraphy, 10 or schlieren imaging 11 are used to infer information about the density or density gradients within the gas flow.…”

Section: Introductionmentioning

confidence: 99%

Advanced measurement of gas jet density using a wavefront sensor

Raclavský

Rao

Lamač

et al. 2023

Compact Radiation Sources From EUV to Gamma-Rays: Development and Applications

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We present a four-pass tomography setup for the characterization of the density distribution of a gas jet. The data acquired with a wavefront sensor is processed using a tomography algorithm, providing a 3D reconstruction of the gas density distribution. We applied this technique to characterize a supersonic gas jet produced by a de Laval nozzle and obstructed by a razor blade in ambient pressure, which are among the common targets used in high-repetition rate laser wakefield acceleration (LWFA) experiments. The results revealed the complex density distribution of the jet, including the formation of barrel shocks. The four-pass tomography setup with a wavefront sensor provides a valuable tool for the detailed characterization of gas jets, enabling the investigation of fundamental fluid mechanics phenomena and contributing to the development of advanced propulsion systems and LWFA gas targets.

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Gas-dynamic density downramp injection in a beam-driven plasma wakefield accelerator

Cited by 15 publications

References 53 publications

Plasma Photocathodes

Plasma Photocathodes

Beam current from downramp injection in electron-driven plasma wakefields

Advanced measurement of gas jet density using a wavefront sensor

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