LLE Review, Volume 91 103 Introduction The OMEGA facility is LLE’s 60-beam, 30-kJ (UV) laser system for performing inertial confinement fusion (ICF) experiments. One of the main features of the OMEGA laser is a flexible optical pulse–shaping system1 that produces 0.1to 5-ns, complex-shaped, low-energy pulses that must be amplified to ~1-mJ level before being injected into power amplifiers. Rege...

A new model for the interaction between the acoustic wave in an enclosed air cavity and the transversal motion of a flexible beam is proposed in this paper. This new boundary condition for the coupled wave and Euler-Bernoulli beam equations introduces sufficient damping of the energy of the system to gain uniform exponential stability. Careful physical justification of the boundary condition is...

This report describes a methodology to classify layout geometry as a beam structural element where geometric recognition fails due to shape complexity. FEA-based results are used to detect various structural elements in the layout. FEA-based simulation is applied to parts of the MEMS device layout to identify the relative stiffness of various elements in the layout. These stiffness maps provide...

Due to countless orthogonal eigenstates, light beams with orbital angular momentum(OAM) have a large potential information capacity. Recently, deep learning has been extensively applied in recognition of OAM mode. However, previous methods require constant distance between laser and receiver. The accuracy will drop quickly if the testing set deviates from training set. Previous also difficulty ...

<p>A flexible beam is recognized as a lightweight structure that prone to excessive vibration, resulting in poor performance. Thus, controlling unwanted vibration necessary maintain the system’s Therefore, this study presents technique suppress undesired by introducing active control (AVC). However, develop an effective controller, appropriate model must first be obtained. In recent times...

In this paper, the physical behaviors of the interaction between a spark-generated bubble and a rubber beam are studied. Both numerical and experimental approaches are employed to investigate the bubble collapse near the rubber beam (which acts as a flexible boundary) and the corresponding large deformation of the beam. Good agreement between the numerical simulations and experimental observati...