Ultrafast Melting of Carbon Induced by Intense Proton Beams

We report on the first results of experiments with a new laser-based proton beam line at the GSI accelerator facility in Darmstadt. It delivers high current bunches at proton energies around 9.6 MeV, containing more than 10 9 particles in less than 10 ns and with tunable energy spread down to 2.7% (ΔE=E 0 at FWHM). A target normal sheath acceleration stage serves as a proton source and a pulsed solenoid provides for beam collimation and energy selection. Finally a synchronous radio frequency (rf) field is applied via a rf cavity for energy compression at a synchronous phase of −90 deg. The proton bunch is characterized at the end of the very compact beam line, only 3 m behind the laser matter interaction point, which defines the particle source.

show abstract

“…They range from fusion science [1], warm dense matter creation [2][3][4], and diagnostic [5][6][7] up to medical applications [8,9].…”

Section: Introductionmentioning

confidence: 99%

Commissioning of a compact laser-based proton beam line for high intensity bunches around 10 MeV

Busold

Schumacher

Deppert

et al. 2014

Phys. Rev. ST Accel. Beams

Self Cite

View full text Add to dashboard Cite

show abstract

“…In previous work, a range of materials has been studied that now includes hydrogen [8,9,10], lithium [4,11], beryllium [3], boron [7] and carbon [12] as well as aluminium [1] mixtures such as CH [13] and LiH [14]. In this experiment, we have extended the range to include Fe, an element of primary importance in planetary science due to its abundance in telluric planets.…”

Section: Introductionmentioning

confidence: 99%

X-ray scattering from warm dense iron

White¹,

Nersisyan²,

Dzelzainis³

et al. 2012

2012 Abstracts IEEE International Conference on Plasma Science

Self Cite

View full text Add to dashboard Cite

We have carried out X-ray scattering experiments on iron foil samples that have been compressed and heated using laser-driven shocks created with the VULCAN laser system at the Rutherford-Appleton Laboratory. This is the highest Z element studied in such experiments so far and the first time scattering from warm dense iron has been reported. Because of the importance of iron in telluric planets, the work is relevant to studies of warm dense matter in planetary interiors. We report scattering results as well as shock breakout results that, in conjunction with hydrodynamic simulations, suggest the target has been compressed to a molten state at several 100 GPa pressure.Initial comparison with modelling suggests more work is needed to understand the structure factor of warm dense iron.

show abstract

“…In many cases of high energy density physics researches, the temperature of the target may reach 1-100 eV while still maintaining the near-solid density, the original cold target becomes warm dense matter (WDM) [1][2][3]. Until now, however, the properties of WDM are not well understood.…”

Section: Introductionmentioning

confidence: 99%

“…Energetic, i.e., MeV, ion-beam-solid interactions provide a much more efficient heating mechanism, i.e., isochoric heating, which is usually of deep (100s µm) and localized energy depositions [12]. Thus, understanding the energetic ion beam dynamics in the matter is of importance for the wide range of potential applications, such as medicine physics including tumour therapy [13], creation of the WDM [1][2][3], and the ion fast ignition concept of inertial confinement fusion [10].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo approach to calculate proton stopping in warm dense matter within particle-in-cell simulations

et al. 2017

Phys. Rev. E

View full text Add to dashboard Cite

A Monte-Carlo approach to proton stopping in warm dense matter is implemented into an existing particle-in-cell code. The model is based on multiple binary-collisions among electron-electron, electron-ion and ion-ion, taking into account contributions from both free and bound electrons, and allows to calculate particle stopping in much more natural manner. At low temperature limit, when "all" electron are bounded at the nucleus, the stopping power converges to the predictions of BetheBloch theory, which shows good consistency with data provided by the NIST. With the rising of temperatures, more and more bound electron are ionized, thus giving rise to an increased stopping power to cold matter, which is consistent with the report of a recently experimental measurement [Phys. Rev. Lett. 114, 215002 (2015)]. When temperature is further increased, with ionizations reaching the maximum, lowered stopping power is observed, which is due to the suppression of collision frequency between projected proton beam and hot plasmas in the target.

show abstract

Ultrafast Melting of Carbon Induced by Intense Proton Beams

Cited by 103 publications

References 30 publications

Commissioning of a compact laser-based proton beam line for high intensity bunches around 10 MeV

Commissioning of a compact laser-based proton beam line for high intensity bunches around 10 MeV

X-ray scattering from warm dense iron

Monte Carlo approach to calculate proton stopping in warm dense matter within particle-in-cell simulations

Contact Info

Product

Resources

About