Peculiar behavior of Si cluster ions in a high-energy-density solid Al plasma

Abstract

A peculiar ion behavior is found in a Si cluster, moving with a speed of ∼ 0.22c(c: speed of light) in a solid Al plasma: the Si ion, moving behind the forward moving Si ion closely in a severalÅ distance in the cluster, feels the wake field generated by the forward Si. The interaction potential on the rear Si may balance the deceleration backward force by itself with the acceleration forward force by the forward Si in the longitudinal moving direction. The forward Si would be decelerated normally. However, the deceleration of the rear Si, moving behind closely, would be reduced significantly, and the rear Si may catch up and overtake the forward moving Si in the cluster during the Si cluster interaction with the high-density Al plasma.

Observation of a high degree of stopping for laser-accelerated intense proton beams in dense ionized matter

“…Such beams provide experimental opportunities to investigate the beam-driven complex collective phenomena [54][55][56][57][58][59] . In particular, the stopping power for these intense beam could be orders of magnitude higher than that for individual particles if the beam intensity is high enough [60][61][62][63] . In our previous experiment, we sent the laser-accelerated ion beams directly into the plasma target, and observed that the energy spectra of the ions were significantly downshifted after passing though the dense plasma 64 .…”

Direct-drive heavy ion beam inertial confinement fusion: a review, toward our future energy source

“…In addition to single heavy ions as HIF driver, it would be valuable to mention cluster ion beam for ICF. We presently see a reevaluation of the cluster ion beam (CIB) approach to ICF, including cluster ion acceleration, cluster fragmentation and target correlated stopping of cluster ions [87][88][89][90]. The CIB drive HIF demonstrates a potential for ICF through the enhanced and correlated ion stopping together with a lower q/A [87,88], which may relax the accelerator design further, compared with that for the conventional HIB accelerators.…”

“…The CIB drive HIF demonstrates a potential for ICF through the enhanced and correlated ion stopping together with a lower q/A [87,88], which may relax the accelerator design further, compared with that for the conventional HIB accelerators. At the same time, the cluster ion source and the stable cluster acceleration should be further studied experimentally [90].…”

“…Studies at HIAF include EOS, material phase transitions, hydrodynamic behavior of matter, ion interaction with materials in the HED state [22]. At KEK, Japan, HEDP and ICF based on a cluster ion beam (CIB) are being considered [12,[87][88][89][90]103,116]. For example, Si clusters are efficiently formed in an ellipsoidal-shaped cell with a Si crystal at the focal point of the cell.…”

Wake potential in graphene-insulator-graphene composite systems

“…The first evidence of the wake effect was provided shortly afterward in an experiment demonstrating the so-called vicinage effect in the energy loss of swift ion clusters in solids [2,3]. The vicinage effect due to the plasmon wake was also predicted to give rise to strongly asymmetric Coulomb explosion patterns of fast clusters in metals and plasmas [4,5]. Moreover, the wake effect was shown to play an important role in the dynamic screening of the core exciton in the electron energy loss spectroscopy (EELS) data for semiconductors and insulators measured in a scanning transmission electron microscope (STEM) [6].…”