欧米茄（OMEGA）装置上的单视线、时间分辨X射线成像诊断仪

The single-line-of-sight, time-resolved x-ray imager diagnostic on OMEGA.

作者信息

Theobald W, Sorce C, Bedzyk M, Ivancic S T, Marshall F J, Stoeckl C, Shah R C, Lawrie M, Regan S P, Sangster T C, Campbell E M, Hilsabeck T J, Englehorn K, Kilkenny J D, Morris D, Chung T M, Hares J D, Dymoke-Bradshaw A K L, Bell P, Celeste J, Carpenter A C, Dayton M, Bradley D K, Jackson M C, Pickworth L, Nagel S R, Rochau G, Porter J, Sanchez M, Claus L, Robertson G, Looker Q

机构信息

Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.

General Atomics, San Diego, California 92121-1122, USA.

出版信息

Rev Sci Instrum. 2018 Oct;89(10):10G117. doi: 10.1063/1.5036767.

DOI:10.1063/1.5036767

PMID:30399700

Abstract

The single-line-of-sight, time-resolved x-ray imager (SLOS-TRXI) on OMEGA is one of a new generation of fast-gated x-ray cameras comprising an electron pulse-dilation imager and a nanosecond-gated, burst-mode, hybrid complementary metal-oxide semiconductor sensor. SLOS-TRXI images the core of imploded cryogenic deuterium-tritium shells in inertial confinement fusion experiments in the ∼4- to 9-keV photon energy range with a pinhole imager onto a photocathode. The diagnostic is mounted on a fixed port almost perpendicular to a 16-channel, framing-camera-based, time-resolved Kirkpatrick-Baez microscope, providing a second time-gated line of sight for hot-spot imaging on OMEGA. SLOS-TRXI achieves ∼40-ps temporal resolution and better than 10-m spatial resolution. Shots with neutron yields of up to 1 × 10 were taken without observed neutron-induced background signal. The implosion images from SLOS-TRXI show the evolution of the stagnating core.

摘要

欧米茄（OMEGA）装置上的单视线时间分辨X射线成像仪（SLOS - TRXI）是新一代快速门控X射线相机之一，它由电子脉冲扩展成像仪和纳秒门控、脉冲模式、混合互补金属氧化物半导体传感器组成。在惯性约束聚变实验中，SLOS - TRXI利用针孔成像仪，在约4至9千电子伏特的光子能量范围内，对低温氘 - 氚靶丸内爆的核心进行成像，成像到光阴极上。该诊断设备安装在一个固定端口上，几乎垂直于基于16通道分幅相机的时间分辨柯克帕特里克 - 贝兹显微镜，为欧米茄装置上的热点成像提供了第二条时间选通视线。SLOS - TRXI实现了约40皮秒的时间分辨率和优于10微米的空间分辨率。在中子产额高达1×10的实验中拍摄时，未观察到中子诱导的背景信号。SLOS - TRXI的内爆图像显示了停滞核心的演化过程。