This is a comprehensive review that examines Interplanetary Coronal Mass Ejections (ICMEs) as critical drivers of energetic particle dynamics across the heliosphere, influencing both solar energetic particle (SEP) acceleration at ICME-driven shocks and the modulation of galactic cosmic rays (GCRs). The interaction of these heliospheric transients with planetary magnetospheres provides a natural laboratory for studying acceleration and transport processes in complex plasma environments. Saturn’s magnetosphere, while internally dynamic, allows partial penetration of heliospheric energetic particles into the outer and middle magnetosphere, enabling indirect solar wind diagnostics and revealing ICME-induced variations such as Forbush decreases and SEP-driven transient radiation belts. In contrast, Jupiter’s much stronger and rapidly rotating magnetosphere presents a fundamentally different regime. External solar particles—particularly SEPs—encounter significant barriers to entry due to the planet’s intense magnetic field and dense, internally sourced plasma environment, limiting direct penetration into the inner magnetosphere. Instead, Jupiter sustains high-efficiency internal acceleration processes, including wave–particle interactions and rotationally driven transport. These mechanisms energize particles to MeV and, in some cases, relativistic energies, producing radiation belts and current systems that largely mask signatures of heliospheric transients. Comparative examination of these two systems provides insight into the regulation of energetic particle acceleration, transport, and modulation in strong-field planetary environments.
This research investigates crater formation during laser ablation of polymerized UDMA–TEGDMA composites, focusing on the quantitative analysis of crater volume and depth under varying laser intensities. Two types of samples were examined: composites without gold nanorods (Au0, reference sample) and composites containing resonant gold nanorod dipole antennas (Au2, plasmonic sample), with the nanorod dimensions tuned to the frequency of the incident laser irradiation. These resonant plasmonic targets were originally developed and investigated within the NAPLIFE (Nano-Plasmonic Laser Induced Fusion Energy) Collaboration, initiated in 2019. The incorporation of resonant gold nanorods enhanced the laser-induced ablation response, resulting in larger crater volumes and greater crater depths at higher laser pulse energies. In contrast, gold nanorods with non-resonant dimensions did not exhibit comparable enhancement, demonstrating that the observed effect is associated with the resonant geometry of the nanorod dipole antennas rather than simply with the presence of gold nanoparticles. Reference-line values were used to establish baseline comparisons, while the average crater depth served as a key indicator of material removal. Building on these experimental findings, the study further integrates artificial intelligence for automated crater analysis. A deep transfer learning approach using a fine-tuned ResNet-18 model was implemented to classify high-resolution crater images of Au0 and Au2 samples. By retraining the final fully connected layer while freezing the convolutional feature extractor, the model achieved a validation accuracy of 98.7 percent, demonstrating stable convergence. The results confirm that deep learning offers a powerful and reproducible framework for high-precision classification and analysis of laser-induced surface structures, paving the way for intelligent materials diagnostics and laser-process optimization.
In this study, corrections to the dispersion relation in Kaluza–Klein theory with one extra compactified spatial dimension were analyzed in a static, spherically symmetric case. The Ricci scalar curvatures of spacetime and phase space in the Einstein conformal frame were studied with respect to the parameter space of the model and for different observers. The presence of a non-zero phase space curvature and/or shift vector modifies the Heisenberg uncertainty relation of massive particles, as well as their dispersion relation, leading to an effective mass.
Future gravitational-wave observatories such as Einstein Telescope and Cosmic Explorer will require a substantial evolution of the laser frequency stabilization strategies currently employed in second-generation interferometric detectors. In Advanced Virgo and Advanced LIGO, residual laser frequency noise is strongly suppressed by feedback from the interferometer common-arm degree of freedom, whose long baseline provides an excellent frequency reference over most of the observation band. In third-generation detectors, however, the much longer arm cavities significantly reduce both the free spectral range and the coupled-cavity pole frequency, limiting the achievable bandwidth of the common-arm control loop and degrading the sensing-noise performance at high frequencies. As a consequence, the interferometer itself may no longer provide the broadband frequency stabilization presently achieved in second-generation instruments. This shifts a much larger fraction of the stabilization burden toward the input-optics system. In this review the implications of such a transition are discussed, with particular emphasis on long suspended input mode cleaners, multi-stage stabilization architectures, higher-order optical mode coupling, sensing-noise limitations, and optical layout considerations relevant for future detectors.
