The scaling of proton energies in ultrashort pulse laser plasma acceleration

Zeil, Karl; Kraft, Stephan; Bock, Stefan; Bußmann, Michael; Cowan, T. E.; Kluge, T.; Metzkes, J.; Richter, Th.; Sauerbrey, R.; Schramm, U.

doi:10.1088/1367-2630/12/4/045015

Cited by 202 publications

(193 citation statements)

References 31 publications

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“…faster than the standard TNSA  . dependence associated with the ponderomotive scaling [1]) is similar to that what was observed in the [7] at lower laser intensities and predicted by the numerical simulations in [18], where this effect can be attributed to the enhancement of laser absorption with the intensity increase. Forward acceleration of the protons follows a fast-scaling TNSA scenario, as already observed in experiments at relatively low intensities.…”

Section: Gwangju 61005 Koreasupporting

confidence: 85%

“…In particular for targets much thicker than the laser penetration length, this scenario leads to the so-called target normal sheath acceleration (TNSA) mechanism [5]. The energy scaling of forward accelerated protons with ~50 fs lasers at intensities ranging from 10 18 to 10 19 W/cm 2 and modest intensity contrast ratios has been reviewed in [6,7]. At much higher laser intensities (10 21 W/cm 2 ) and improved pulse contrast, the generation of high-energy protons is likely to follow different acceleration scenarios and energy scaling laws due to the formation of a relativistic skin depth at the target front, arising from relativistic self-induced transparency, which may have influence also on the acceleration of ions at the target rear.…”

Section: Gwangju 61005 Koreamentioning

confidence: 99%

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Ion acceleration in electrostatic field of charged cavity created by ultra-short laser pulses of 1020–1021 W/cm2

et al. 2017

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Ion acceleration resulting from the interaction of ultra-high intensity and ultra-high contrast (∼10−10) laser pulses with thin Al foil targets at 30° angle of laser incidence is studied. Proton maximum energies of 30 and 18 MeV are measured along the target normal rear and front sides, respectively, showing intensity scaling as Ib. For the target front bfront= 0.5–0.6 and for the target rear brear= 0.7–0.8 is observed in the intensity range 1020–1021 W/cm2. The fast scaling from the target rear ∼I0.75 can be attributed enhancement of laser energy absorption as already observed at relatively low intensities. The backward acceleration of the front side protons with intensity scaling as ∼I0.5 can be attributed to the to the formation of a positively charged cavity at the target front via ponderomotive displacement of the target electrons at the interaction of relativistic intense laser pulses with a solid target. The experimental results are in a good agreement with theoretical predictions.

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Section: Gwangju 61005 Koreasupporting

confidence: 85%

Section: Gwangju 61005 Koreamentioning

confidence: 99%

Ion acceleration in electrostatic field of charged cavity created by ultra-short laser pulses of 1020–1021 W/cm2

et al. 2017

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“…Over the last decade, intense proton pulses with energies exceeding several 10 MeV have been reached with large single-shot laser facilities. Yet, only with the recent generation of table-top 100 TW Ti:Sapphire lasers, operating at pulse repetition rates of up to 10 Hz, energies exceeding 10 MeV [14][15][16][17][18] became accessible for applications where also the average dose rate is of interest, e.g., for providing sufficiently short treatment durations of a few minutes. For the anticipated future application in radiation therapy, a further increase in the proton energy of up to 200-250 MeV is required, which is currently addressed by the investigation of novel acceleration schemes [19][20][21] as well as by ongoing laser development.…”

Section: Introductionmentioning

confidence: 99%

“…The experiment was carried out with the ultra-short pulse Ti:Sapphire laser system Draco at HZDR [14], here providing an energy of 1.8 J on target contained in a pulse of 30-fs duration. When tightly focused onto a 2-lm-thick titanium foil target (Fig.…”

Section: Introductionmentioning

confidence: 99%

Dose-controlled irradiation of cancer cells with laser-accelerated proton pulses

et al. 2012

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Proton beams are a promising tool for the improvement of radiotherapy of cancer, and compact laserdriven proton radiation (LDPR) is discussed as an alternative to established large-scale technology facilitating wider clinical use. Yet, clinical use of LDPR requires substantial development in reliable beam generation and transport, but also in dosimetric protocols as well as validation in radiobiological studies. Here, we present the first dose-controlled direct comparison of the radiobiological effectiveness of intense proton pulses from a laser-driven accelerator with conventionally generated continuous proton beams, demonstrating a first milestone in translational research. Controlled dose delivery, precisely online and offline monitored for each out of *4,000 pulses, resulted in an unprecedented relative dose uncertainty of below 10 %, using approaches scalable to the next translational step toward radiotherapy application.

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“…So far different acceleration regimes, for instance target normal sheath acceleration (TNSA) [7], the radiation pressure acceleration [8], "Light sail" acceleration [9], "Laser piston" acceleration [10], "Break-out afterburner" acceleration [11], have been studied and several experimental results on laser driven ion energies [12][13][14], obtained mainly within the TNSA regime, have been reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

et al. 2015

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Charged particle acceleration using ultra-intense and ultra-short laser pulses has gathered a strong interest in the scientific community and it is now one of the most attractive topics in the relativistic laser-plasma interaction research. Indeed, it could represent the future of particle acceleration and open new scenarios in multidisciplinary fields, in particular, medical applications. One of the biggest challenges consists of using, in a future perspective, high intensity laser-target interaction to generate high-energy ions for therapeutic purposes, eventually replacing the old paradigm of acceleration, characterized OPEN ACCESSAppl. Sci. 2015, 5 428 by huge and complex machines. The peculiarities of laser-driven beams led to develop new strategies and advanced techniques for transport, diagnostics and dosimetry of the accelerated particles, due to the wide energy spread, the angular divergence and the extremely intense pulses. In this framework, the realization of the ELIMED (ELI-Beamlines MEDical applications) beamline, developed by INFN-LNS (Catania, Italy) and installed in 2017 as a part of the ELIMAIA beamline at the ELI-Beamlines (Extreme Light Infrastructure Beamlines) facility in Prague, has the aim to investigate the feasibility of using laser-driven ion beams in multidisciplinary applications. ELIMED will represent the first user's open transport beam line where a controlled laser-driven ion beam will be used for multidisciplinary and medical studies. In this paper, an overview of the beamline, with a detailed description of the main transport elements, will be presented. Moreover, a description of the detectors dedicated to diagnostics and dosimetry will be reported, with some preliminary results obtained both with accelerator-driven and laser-driven beams.

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The scaling of proton energies in ultrashort pulse laser plasma acceleration

Cited by 202 publications

References 31 publications

Ion acceleration in electrostatic field of charged cavity created by ultra-short laser pulses of 1020–1021 W/cm2

Ion acceleration in electrostatic field of charged cavity created by ultra-short laser pulses of 1020–1021 W/cm2

Dose-controlled irradiation of cancer cells with laser-accelerated proton pulses

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

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