Ramp-Wave Compression Experiment with Direct Laser Illumination on ShenGuang-III Prototype Laser Facility

Abstract

Ramp-wave compression experiment to balance the high compression pressure generation in aluminum and x-ray blanking effect in transparent window is demonstrated with an imaging velocity interferometer system for any reflector (VISAR) on ShenGuang-III prototype laser facility. The highest pressure is about 500 GPa after using the multilayer target design Al/Au/Al/LiF and 1013 W/cm2 laser pulse illuminated on the planar Al target, which generates the spatial uniformity to over 500 μm on the ablation layer. A 2-μm-thick Au layer is used to prevent the x-ray from preheating the planar ablation Al layer and window material LiF. The imaging VISAR system can be used to record the abrupt loss of the probe beam ( nm) caused by absorption and reflection of 20-μm, 30-μm and 40-μm-thick Al, i.e., the blanking effect. Although there are slight shocks in the target, the peak pressure 500 GPa, which is the highest data up to now, is obtained with ramp-wave compression.

Reference-frame-independent quantum key distribution of wavelength division multiplexing with multiple quantum channels*

“…Unlike classical cryptography, security of quantum cryptography does not depend on mathematical complexity, but rather, is based on the fundamental principles of quantum physics. [1][2][3][4][5] However, during the implementation of a quantum key distribution (QKD) system, equipment defects lead to vulnerability of the security vulnerability of the QKD protocol. [6,7] To improve the security of a QKD system, many QKD protocols have been proposed.…”