Laser-proton Acceleration Developments At DRACO-PW Enabling “In-vivo” Radiobiology

Ziegler, Tim; Bernert, Constantin; Beyreuther, Elke; Brack, F. E.; Cowan, Thomas E.; Garten, Marco; Gaus, Lennart; Kluge, T.; Kraft, Stephan; Kroll, Florian; Metzkes-Ng, Josefine; Pawelke, Jörg; Reimold, Marvin; Rehwald, Martin; Schlenvoigt, Hans-Peter; Umlandt, Marvin Elias Paul; Schramm, U.; Zeil, Karl

doi:10.1364/hilas.2022.hf4b.2

Cited by 1 publication

(1 citation statement)

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“…As a result, the characteristics of these laser-generated beams are fundamentally different from those of traditional ion sources, potentially broadening the range of the accelerators' potential for use in research and applications. They can deliver ions with energies above 100 MeV (Kim et al 2016;Wagner et al 2016;Higginson et al 2018;Ziegler et al 2023), in picoseconds at the source (Dromey et al 2016). The target normal sheath acceleration (TNSA) (Wilks et al 2001), which is particularly suitable due to its robustness and the ensuing reliability, is the most researched and frequently used laser-driven ion acceleration mechanism.…”

Section: Introductionmentioning

confidence: 99%

Towards ion stopping power experiments with the laser-driven LIGHT beamline

Nazary,

Metternich,

Schumacher

et al. 2024

J. Plasma Phys.

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The main emphasis of the Laser Ion Generation, Handling and Transport (LIGHT) beamline at GSI Helmholtzzentrum für Schwerionenforschung GmbH are phase-space manipulations of laser-generated ion beams. In recent years, the LIGHT collaboration has successfully generated and focused intense proton bunches with an energy of 8 MeV and a temporal duration shorter than 1 ns (FWHM). An interesting area of application that exploits the short ion bunch properties of LIGHT is the study of ion-stopping power in plasmas, a key process in inertial confinement fusion for understanding energy deposition in dense plasmas. The most challenging regime is found when the projectile velocity closely approaches the thermal plasma electron velocity ( $v_{i}\approx v_{e,\text {th}}$ ), for which existing theories show high discrepancies. Since conclusive experimental data are scarce in this regime, we plan to conduct experiments on laser-generated plasma probed with ions generated with LIGHT at a higher temporal resolution than previously achievable. The high temporal resolution is important because the parameters of laser-generated plasmas are changing on the nanosecond time scale. To meet this goal, our recent studies have dealt with ions of lower kinetic energies. In 2021, laser accelerated carbon ions were transported with two solenoids and focused temporally with LIGHT's radio frequency cavity. A bunch length of 1.2 ns (FWHM) at an energy of 0.6 MeV u $^{-1}$ was achieved. In 2022, protons with an energy of 0.6 MeV were transported and temporally compressed to a bunch length of 0.8 ns. The proton beam was used to measure the energy loss in a cold foil. Both the ion and proton beams will also be employed for energy loss measurements in a plasma target.

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