Trapped electron acceleration by a laser-driven relativistic plasma wave

Everett, Matthew J.; Lal, Amit K.; Gordon, Daniel; Clayton, C. E.; Marsh, K. A.; Joshi, C.

doi:10.1038/368527a0

Cited by 131 publications

(63 citation statements)

References 16 publications

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“…The first configuration is the so-called injector-accelerator, where a ∼ 100 MeV class electron beam produced by a short, high-density injector stage is further accelerated to ∼ GeV level using a second low-density accelerator stage [11,24,25]. The second example is the external injection scheme where a highquality, relativistic electron bunch is first generated using an RF accelerator and then injected into a PBA [26][27][28][29][30]. The third example concerns the proposed PBA driven light source [31][32][33], where a high-quality electron beam needs to be coupled from the plasma wake to an undulator.…”

mentioning

confidence: 99%

Physics of Phase Space Matching for Staging Plasma and Traditional Accelerator Components Using Longitudinally Tailored Plasma Profiles

Hua

et al. 2016

Phys. Rev. Lett.

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Phase space matching between two plasma-accelerator (PA) stages and between a PA and a traditional accelerator component is a critical issue for emittance preservation of beams accelerated by PAs. The drastic differences of the transverse focusing strengths as the beam propagates between different stages and components may lead to a catastrophic emittance growth in the presence of both finite energy spread and lack of proper matching. We propose using the linear focusing forces from nonlinear wakes in longitudinally tailored plasma density profiles to provide exact phase space matching to properly transport the electron beam through two such stages with negligible emittance growth. Theoretical analysis and particle-in-cell simulations show how these structures may work in four different scenarios. Good agreement between theory and simulation is obtained.

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confidence: 99%

Physics of Phase Space Matching for Staging Plasma and Traditional Accelerator Components Using Longitudinally Tailored Plasma Profiles

Hua

et al. 2016

Phys. Rev. Lett.

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“…Conventional subnanosecond, multi-GW CO2 lasers have been, and continue to be, used successfully in laser beatwave accelerator (LWBA) experiments, where externally-injected electrons have been accelerated to energies as high as 30 MeV [9,10]. The projected generation of ps, multi-TW CO2 pulses will not only upgrade ongoing far field (inverse Cerenkov and inverse FEL) experiments, but will open application of CO2 lasers to plasma-based LWFA schemes for the first time.…”

Section: Terawatt Laser Technologies In Handmentioning

confidence: 99%

Summary report: Working group 7 on “laser sources for particle acceleration”

Downer¹,

Siders²

1997

The Seventh Workshop on Advanced Accelerator Concepts

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“…The resonant case demonstrates the characteristic RL limit of E z ≤ E RL = (16ǫ/3) 1/3 E 0 ≈ 4.2 GV/m, whereas the DMG scheme fails to achieve appreciable dynamic phase-locking, and the final plasma wave amplitude is about the same as in the resonant (unchirped) case. Using approximately these parameters, UCLA experiments have inferred accelerating amplitudes up to 2.8 GV/m [17] over short regions of plasma. More recently, plasma density variations corresponding to E z ≈ 0.2 − 0.4 GV/m have been directly measured with Thomson scattering [45].…”

Section: Experimental Considerationsmentioning

confidence: 99%

“…Subsequently the PBWA concept has been studied extensively theoretically, numerically, and experimentally [5,6,7,8,9,10,11,12,13,14,15,16,17,18]. (For a review, see [19].)…”

Section: Introduction and Overviewmentioning

confidence: 99%

Robust Autoresonant Excitation in the Plasma Beat-Wave Accelerator

et al. 2004

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A modified version of the Plasma Beat-Wave Accelerator scheme is introduced and analyzed, which is based on autoresonant phase-locking of the nonlinear Langmuir wave to the slowly chirped beat frequency of the driving lasers via adiabatic passage through resonance. This new scheme is designed to overcome some of the well-known limitations of previous approaches, namely relativistic detuning and nonlinear modulation or other non-uniformity or non-stationarity in the driven Langmuir wave amplitude, and sensitivity to frequency mismatch due to measurement uncertainties and density fluctuations and inhomogeneities. As in previous schemes, modulational instabilities of the ionic background ultimately limit the useful interaction time, but nevertheless peak electric fields at or approaching the wave-breaking limit seem readily attainable. Compared to traditional approaches, the autoresonant scheme achieves larger accelerating electric fields for given laser intensity, or comparable fields for less laser power; the plasma wave excitation is much more robust to variations or uncertainties in plasma density; it is largely insensitive to the precise choice of chirp rate, provided only that chirping is sufficiently slow; and the quality and uniformity of the resulting plasma wave and its suitability for accelerator applications may be superior. In underdense plasmas, the total frequency shift required is only of the order of a few percent of the laser carrier frequency, and for possible experimental proofs-of-principle, the scheme might be implemented with relatively little additional modification to existing systems based on either solid-state amplifiers and Chirped Pulse Amplification techniques, or, with somewhat greater technological effort, using a CO2 or other gas laser system.

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Trapped electron acceleration by a laser-driven relativistic plasma wave

Cited by 131 publications

References 16 publications

Physics of Phase Space Matching for Staging Plasma and Traditional Accelerator Components Using Longitudinally Tailored Plasma Profiles

Physics of Phase Space Matching for Staging Plasma and Traditional Accelerator Components Using Longitudinally Tailored Plasma Profiles

Summary report: Working group 7 on “laser sources for particle acceleration”

Robust Autoresonant Excitation in the Plasma Beat-Wave Accelerator

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