Generation of High-Current Proton Beams With a Low Energy Spread by Phase-Stable Acceleration (PSA)

Liu, B.C.; He, Zhaohan; Yan, X. Q.; Sheng, Zheng-Ming; Guo, Z Y; Lu, Yuanrong; Chen, J.E.

doi:10.1109/tps.2008.927161

Cited by 8 publications

(13 citation statements)

References 20 publications

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“…The experiments show that the proton energy increases as the target thickness decreases for a given laser intensity, and that there is an optimum thickness of the target (several nm) at which the maximum proton energy peaks and below which the proton energy now decreases. This optimum thickness for the peak proton energy is consistent with the thickness dictated by the relation Esirkepov (2006); Liu (2008); Matsukado (2003); Rykovanov (2008) …”

supporting

confidence: 79%

Laser-Driven Radiation Therapy

Habs¹,

Tajima²,

Köster³

2011

Current Cancer Treatment - Novel Beyond Conventional Approaches

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supporting

confidence: 79%

Laser-Driven Radiation Therapy

Habs¹,

Tajima²,

Köster³

2011

Current Cancer Treatment - Novel Beyond Conventional Approaches

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“…11. To discuss the PSA regime easily, a simple model can been derived to elucidate the bunch formation for laser plasma interaction Liu and He 2008). A linear profile of both in the electron depletion region ( E x1 = E 0 x∕d for 0 < x < d ) and in the compressed electron layer ( E x2 Fig.…”

Section: Phase Stable Accelerationmentioning

confidence: 99%

“…Here is the reflecting efficiency. To describe the interaction between the protons and electrons beyond hydrodynamics, dynamic equations are derived based on this model (Liu and He 2008). We introduce = x i − x r with −l s ∕2 ≤ ≤ l s ∕2 , where x r = d + l s ∕2 represents the position for the reference particle.…”

Section: Phase Stable Accelerationmentioning

confidence: 99%

Wakefield acceleration

Tajima

Yan

Ebisuzaki

2020

Rev. Mod. Plasma Phys.

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The fundamental idea of Laser Wakefield Acceleration (LWFA) is reviewed. An ultrafast intense laser pulse drives coherent wakefields of relativistic amplitude with the high phase velocity robustly supported by the plasma. The structures of wakes and sheaths in plasma are contrasted. While the large amplitude of wakefields involves collective resonant oscillations of the eigenmode of the entire plasma electrons, the wake phase velocity ~ c and ultrafastness of the laser pulse introduce the wake stability and rigidity. When the phase velocity gets smaller, wakefields turn into sheaths. When we deploy laser ion acceleration or high density LWFA in which the phase velocity of plasma excitation is low, we encounter the sheath dynamics. A large number of worldwide experiments show a rapid progress of this concept realization toward both the high energy accelerator prospect and broad applications. The strong interest in this has driven novel laser technologies, including the Chirped Pulse Amplification, the Thin Film Compression (TFC), the Coherent Amplification Network, and the Relativistic Compression (RC). These in turn have created a conglomerate of novel science and technology with LWFA to form a new genre of high field science with many parameters of merit in this field increasing exponentially lately. Applications such as ion acceleration, X-ray free electron laser, electron and ion cancer therapy are discussed. A new avenue of LWFA using nanomaterials is also emerging, adopting X-ray laser using the above TFC and RC. Meanwhile, we find evidence that the Mother Nature spontaneously created wakefields that accelerate electrons and ions to very high energies.

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“…Another encouraging element is the demonstration that laser-proton beam conversion efficiency and ion energy cutoff can significantly exceed published TNSA scaling laws [13] by using targets with advanced geometries [14]. Besides TNSA, other laserdriven proton acceleration mechanisms have been explored in simulations, based on longitudinal charge separation between the target ions and electrons, the latter driven by the ponderomotive force of the laser [15][16][17][18][19][20][21][22][23]. This regime dominates with circular polarization [15][16][17][18][19][20][21] (where electron heating can be negligible), and becomes accessible with linear laser polarization above ∼10 22 W cm −2 [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…Besides TNSA, other laserdriven proton acceleration mechanisms have been explored in simulations, based on longitudinal charge separation between the target ions and electrons, the latter driven by the ponderomotive force of the laser [15][16][17][18][19][20][21][22][23]. This regime dominates with circular polarization [15][16][17][18][19][20][21] (where electron heating can be negligible), and becomes accessible with linear laser polarization above ∼10 22 W cm −2 [22,23]. These mechanisms are known as radiation-pressure acceleration (RPA) [16,18], skin-layer ponderomotive acceleration (SLPA) [19], phase-stable acceleration (PSA) [20,21] and laser-piston acceleration (LPA) [22,23].…”

Section: Introductionmentioning

confidence: 99%

Progress and prospects of ion-driven fast ignition

et al. 2009

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Fusion fast ignition (FI) initiated by laser-driven ion beams is a promising concept examined in this paper. FI based on a beam of quasi-monoenergetic ions (protons or heavier ions) has the advantage of a more localized energy deposition, which minimizes the required total beam energy, bringing it close to the ≈10 kJ minimum required for fuel densities ∼500 g cm−3. High-current, laser-driven ion beams are most promising for this purpose. Because they are born neutralized in picosecond timescales, these beams may deliver the power density required to ignite the compressed DT fuel, ∼10 kJ/10 ps into a spot 20 µm in diameter. Our modelling of ion-based FI include high fusion gain targets and a proof of principle experiment. That modelling indicates the concept is feasible, and provides confirmation of our understanding of the operative physics, a firmer foundation for the requirements, and a better understanding of the optimization trade space. An important benefit of the scheme is that such a high-energy, quasi-monoenergetic ignitor beam could be generated far from the capsule (⩾1 cm away), eliminating the need for a reentrant cone in the capsule to protect the ion-generation laser target, a tremendous practical benefit. This paper summarizes the ion-based FI concept, the integrated ion-driven FI modelling, the requirements on the ignitor beam derived from that modelling, and the progress in developing a suitable laser-driven ignitor ion beam.

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Generation of High-Current Proton Beams With a Low Energy Spread by Phase-Stable Acceleration (PSA)

Cited by 8 publications

References 20 publications

Laser-Driven Radiation Therapy

Laser-Driven Radiation Therapy

Wakefield acceleration

Progress and prospects of ion-driven fast ignition

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