High-Resolution X-Ray Backlight Radiography Using Picosecond Petawatt Laser

Weimin, 周维民 Zhou; Minghai, 于明海 Yu; Tiankui, 张天奎 Zhang; Chao, 田超 Tian; Lianqiang, 单连强 Shan; Yuchi, 吴玉迟 Wu; Feng, 张锋 Zhang; Bi, 毕碧 Bi; Genbai, 储根柏 Chu; Min, 税敏 Shui; Jianting, 辛建婷 Xin; Leifeng, 曹磊峰 Cao; Yuqiu, 谷渝秋 Gu; Shaoping, 朱少平 Zhu; Feng, 景峰 Jing; Baohan, 张保汉 Zhang

doi:10.3788/cjl202047.0500010

Cited by 4 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…从上述研究可以看出, 利用激光等离子体射流碰撞可以驱动平面性好、温升较低的飞片, 这一点相比传统的激光驱动带窗口约束的飞片具有明显的优势 [9−13] . 然而, 目前对于飞片平面性和完整性的表征, 主要依赖线VISAR测量 [7,8] 和验证板 [13,14] 的结果, 对飞片的飞行姿态和表观形貌(平面性和完整性)都缺乏直接的观测结果, 而这很大程度上决定了激光驱动飞片能否在EOS甚至更多的研究领域(如激光驱动飞片起爆 [10] )得到广泛和深入的应用. 近两年, 基于皮秒拍瓦激光的高分辨Ｘ射线背光照相技术 [15] 由于具有高亮度、高时空分辨的特点, 在惯性约束聚变内爆过程和冲击加载材料微喷过程研究 [16−19] 光与背光靶作用产生X光对飞片姿态进行侧向透视照相(HXI), 结合阴影照相 [20] 和界面冲击波诊 [18] , 研究飞片的加速过程、表观形貌和飞行姿态演化(翻滚、弯曲、倾斜等).…”

Section: 引言利用激光烧蚀有机材料(以下简称气库膜)形unclassified

Laser-plasma jet driven sub-millimeter diameter aluminum flyer and its gesture diagnosis

税敏¹

2022

Acta Phys. Sin.

View full text Add to dashboard Cite

Laser-driven flyer has been studied for decades as it is promising in many application areas, such as EOS measurements under ultrahigh pressure, material dynamic properties under high strain rate, high-speed impact simulation for aircraft protection, as well as explosive ignition. However, the planarity and integrity of flyers are determined by indirect VISAR or witness slab results due to its high speed and small dimension. For further and widely application, it is very important to obtain direct experimental proof of the flyer gesture and configuration. Thus, the acceleration and gesture investigation of aluminum flyer driven by laser plasma was studied at Xingguang-III laser facility. X-ray radiography was achieved by irradiation of picosecond laser upon the copper wire target. Shadowgraph of flyer and plasma was realized by incidence of a bunch of infrared laser through the flyer flight path. In additon, PDV was employed to measure flyer velocity simultaneously. Radiography, shadowgraph and velocity of typical small aluminum flyer was obtained. By optimizing the thickness of both CH ablation layer and vacuum gap, the flyer is slowly accelerated via consecutive stress wave produced by plasma colliding. The aluminum flyer has a thickness of 20μm and diameter of about 500μm, respectively. The whole flyer still sustains integrated shape after a great angle of rotation due to uneven plasma loading. The flight distance is about 400μm, giving an average velocity of 2.2km/s. The planarity of the flyer is good except a little bend at the two sides due to side rarefaction of plasma. The study verifies that the laser plasma collision can generate sub-millimeter-diameter metal flyer with integrated shape and several km/s of velocity, shows promising in EOS and explosive ignition application.

show abstract

Section: 引言利用激光烧蚀有机材料(以下简称气库膜)形unclassified

Laser-plasma jet driven sub-millimeter diameter aluminum flyer and its gesture diagnosis

税敏¹

2022

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

“…How to effectively suppress the fast nonlinear growth and improve the near-field quality of the output beam in picosecond laser systems has become a hot topic of interest. The research found that the specific range of MHFs around the millimeter scale had the fastest nonlinear gain rate [1] . These frequencies will grow rapidly with the transmission distance of the beam, and further lead to SSSF effect, which will reduce the output performance of the high-power laser system [2][3][4][5][6] .…”

Section: Introductionmentioning

confidence: 98%

“…

The high-power picosecond laser systems have been used in many fields, such as materials dynamics research, cancer treatment, and high spatial and temporal resolution backlight radiography [1] . Compared to nanosecond laser, picosecond laser with higher peak intensity can generate more serious fast nonlinear growth, which leads to the small-scale autofocusing (SSSF) effect and the beam splitting into filament, affecting the safe operation of the laser system and limiting its output capability.

…”

mentioning

confidence: 99%

The control of fast nonlinear growth in picosecond laser

Zheng,

Zhang,

Yuan

2023

AOPC 2023: Laser Technology and Applications; And Optoelectronic Devices and Integration

View full text Add to dashboard Cite

“…X-ray sources have many applications in fields such as radiography [1], nondestructive testing (NDT) [2][3] and plasma hydrodynamic diagnostics [4] [5]. Laserplasma-based X-ray sources have attracted considerable attention in recent years owing to their compact size, short duration and broadband spectrum [6] [7][8] [9].…”

Section: Introductionmentioning

confidence: 99%

Diagnostics for ultrashort X-ray pulses using silicon trackers

Wen,

Yu,

et al. 2021

Preprint

View full text Add to dashboard Cite

The spectrum of laser-plasma generated X-rays is very important, it characterizes electron dynamics in plasma and is basic for applications. However, the accuracies and efficiencies of existing methods to diagnose the spectrum of laserplasma based X-ray pulse are not very high, especially in the range of several hundred keV. In this study, a new method based on electron tracks detection to measure the spectrum of laser-plasma produced X-ray pulses is proposed and demonstrated. Laser-plasma generated X-rays are scattered in a multi-pixel silicon tracker. Energies and scattering directions of Compton electrons can be extracted from the response of the detector, and then the spectrum of X-rays can be reconstructed. Simulations indicate that the energy resolution of this method is approximately 20% for X-rays from 200 to 550 keV for a silicon-oninsulator pixel detector with 12 µm pixel pitch and 500 µm depletion region thickness. The results of a proof-of-principle experiment based on a Timepix3 detector are also shown.

show abstract

High-Resolution X-Ray Backlight Radiography Using Picosecond Petawatt Laser

Cited by 4 publications

References 0 publications

Laser-plasma jet driven sub-millimeter diameter aluminum flyer and its gesture diagnosis

Laser-plasma jet driven sub-millimeter diameter aluminum flyer and its gesture diagnosis

The control of fast nonlinear growth in picosecond laser

Diagnostics for ultrashort X-ray pulses using silicon trackers

Contact Info

Product

Resources

About