Multi-stage proton acceleration controlled by double beam image technique

Wang, W. P.; Shen, Baifei; Zhang, H.; Lu, Xiaoming; Li, J. F.; Zhai, S. H.; Li, S. S.; Wang, X. L.; Xu, Rui; Wang, C.; Leng, Yuxin; Liang, Xiaoyan; Li, R. X.; Xu, Zhizhan

doi:10.1063/1.5022347

Cited by 12 publications

(8 citation statements)

References 25 publications

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“…However, as the rapid and significant technological advances have been made in the target fabrication [57], the target described in this paper can now or very soon be manufactured, where the tube can be filled with foams [38], cryogenic hydrogen microjet [39] or high-pressure gas jets [40]. In order to make the proposed scheme work properly without prematurely expansion of the tube wall, a laser contrast of 10 10 is required, which is available by using the plasma mirrors [58,59]. Moreover, though the energy spread has a certain broadening as shock propagates a long distance [53] in our scheme, we obtained proton beams with large particle numbers that are preferable for many applications that require high flux, such as laser-driven neutron sources [7] and isochoric heating of matter [8].…”

Section: Summary and Discussionmentioning

confidence: 99%

High-flux high-energy ion beam production from stable collisionless shock acceleration by intense petawatt-picosecond laser pulses

Qiao

Shen

et al. 2019

New J. Phys.

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A scheme to achieve stable collisionless shock acceleration (CSA) of ions from a near-critical plasma by intense petawatt-picosecond laser pulses is proposed, where the plasma is confined in a high-Z solid tube. The application of the tube, on the one hand, restrains the plasma from transverse thermal expansion, helping to sustain sufficient density steepening required for shock formation and maintenance; on the other hand, due to the induced sheath field along its wall, pinches hot electrons for recirculation near laser axis, aiding to reach efficient plasma heating that is crucial to have a strong shock velocity for ion reflection. Consequently, stable ion CSA can be maintained for picosecond time scales, resulting in production of high-flux high-energy ion beams. Two-dimensional PIC simulations show that proton beams with narrow energy spread between 50 and 80 MeV and high flux with particle number about 10 12 are produced by a laser pulse at intensity 8.8×10 19 W cm −2 and duration 1 ps. By extending the pulse duration to 3 ps, over 100 MeV high-flux proton beams are obtained.

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Section: Summary and Discussionmentioning

confidence: 99%

High-flux high-energy ion beam production from stable collisionless shock acceleration by intense petawatt-picosecond laser pulses

Qiao

Shen

et al. 2019

New J. Phys.

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“…Perhaps because of these challenges, in their literature review Ferri, Siminos, and Fülöp 10 could only cite experimental papers where two pulses arrive on target from the same angle but with a time delay [13][14][15] and one paper in which an intense pulse reflects from the target and is redirected to the target area by reflecting from a spherical shell 16 . We note that 17 uses two pulses from different angles on two different targets in a multi stage approach to TNSA. However none of these experimental studies consider simultaneous double pulse irradiation of targets from two different angles of incidence like 10,11 propose.…”

Section: Introductionmentioning

confidence: 99%

Particle-in-cell modeling of a potential demonstration experiment for double pulse enhanced target normal sheath acceleration

et al. 2021

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Ultra intense lasers are a promising source of energetic ions for various applications. An interesting approach described in Ferri et al. 2019 argues from Particle-in-Cell simulations that using two laser pulses of half energy (half intensity) arriving with close to 45 degrees angle of incidence is more effective at accelerating ions than one pulse at full energy (full intensity). The authors describe this result as "enhanced Target Normal Sheath Acceleration". For a variety of reasons, at the time of this writing there has not yet been a true experimental demonstration of this enhancement. In this paper we perform 2D Particle-in-Cell simulations to examine if a milliJoule class, 5 • 10 18 W cm −2 peak intensity laser system could be used for such a demonstration experiment. Laser systems in this class can operate at a kHz rate which should be helpful for addressing some of the challenges of performing this experiment. Despite investigating a 3.5 times lower intensity than Ferri et al. 2019 did, we find that the double pulse approach enhances the peak proton energy and the energy conversion to protons by a factor of about three compared to a single laser pulse with the same total laser energy. We also comment on the nature of the enhancement and why the double pulse scheme is so efficient.

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“…Recently, the cascaded TNSA mechanism has been proposed to actively tailor the Maxwell spectra of the proton beam into a narrower spectrum in experiments, while reducing the experimental requirements [38][39][40]. Initially, Pfotenhauer et al performed the cascaded TNSA experiments [38].…”

Section: Introductionmentioning

confidence: 99%

Cascaded solenoid acceleration of vortex laser-driven collimated proton beam

Sun¹,

Wang²,

Dong³

et al. 2023

Plasma Phys. Control. Fusion

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Efficient cascaded proton acceleration driven by an intense Laguerre–Gaussian (LG) laser is realized in combined three-dimensional particle-in-cell (PIC) simulations and CST STUDIO SUITE (CST) simulations. CST simulations show that there is no divergent force component in the transverse direction in the coil center. Therefore, the collimated proton beam driven by the LG laser in the first stage benefits from the uniform beam acceleration in the second stage. By contrast, the proton beam with larger divergence disperses to the outside of the coil because of the divergent force near the coil wire in the Gaussian laser case. Finally, a quasi-monoenergetic proton beam with a higher flux is generated by the LG laser, which is much better than the Gaussian laser case. The obtained proton beam can potentially be used in some special applications, such as proton radiography, fast ignition of fusion targets, biomedical applications, and production of warm dense matter.

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Multi-stage proton acceleration controlled by double beam image technique

Cited by 12 publications

References 25 publications

High-flux high-energy ion beam production from stable collisionless shock acceleration by intense petawatt-picosecond laser pulses

High-flux high-energy ion beam production from stable collisionless shock acceleration by intense petawatt-picosecond laser pulses

Particle-in-cell modeling of a potential demonstration experiment for double pulse enhanced target normal sheath acceleration

Cascaded solenoid acceleration of vortex laser-driven collimated proton beam

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