Radiation detection, using materials to convert high-energy photons to low-energy photons (X-ray imaging) or electrical charges (X-ray detector), has become essential for a wide range of applicatio

Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

Colloidal nanocrystals are nanometer-sized, solution-grown inorganic particles stabilized by a layer of surfactants attached to their surface. The inorganic cores exhibit useful properties controlled by composition as well as size and shape, while the surfactant coating ensures that these structures are easy to fabricate and process. It is this combination of features that makes colloidal nanocrystals attractive and promising building blocks for advanced materials and devices. But their full potential can only be exploited if we achieve exquisite control over their composition, size, shape, crystal structure and surface properties. Here we review what is known about nanocrystal growth and outline strategies for controlling it.

Colloidal nanocrystal synthesis and the organic-inorganic interface

Multifunctional broadband microwave absorption of flexible graphene composites

Halide perovskites for high-performance X-ray detector

Designing a dual-functional epoxy composite system with self-healing/barrier anti-corrosion performance using graphene oxide nano-scale platforms decorated with zinc doped-conductive polypyrrole nanoparticles with great environmental stability and non-toxicity

Enhanced X-ray photon response in solution-synthesized CsPbBr3 nanoparticles wrapped by reduced graphene oxide

The invention discloses an optical fiber image-transmitting bundle velocity interferometer, which comprises an imaging module, an optical fiber image-transmitting bundle, an interference module I and an interference module II. The invention further discloses a shock wave velocity calculation method based on the optical fiber image-transmitting bundle velocity interferometer. The shock wave velocity calculation method comprises the steps that firstly, a light source emits short-pulse probe laser light to the optical fiber image-transmitting bundle velocity interferometer, and the time difference of arrival of two laser pulse signals emitted from the interference modules and interference fringe images are recorded by using a streak camera; then, the light source emits short-pulse probe laser light to the optical fiber image-transmitting bundle velocity interferometer, and the time difference of arrival of laser pulse signals emitted by two single-mode optical fiber bundle branches corresponding to the interference modules is recorded by using the streak camera; and finally, the shock wave velocity is calculated. According to the equipment and method, the shock wave velocity in a large continuous range can be acquired. The optical fiber image-transmitting bundle velocity interferometer is simple in light path adjustment, not restricted by the experiment field and space, low in experiment cost and high in efficiency.

Optical fiber image-transmitting bundle velocity interferometer and shock wave velocity calculation method

The utility model discloses a multi -functional laser fusion measuring device, pass like the module, interfere module no 1 and interference module no 2 including illumination camera lens, beam splitter no 1, beam splitter no 2, imaging lens no 1, imaging lens no 2, imaging lens no 3, streak camera no 1, streak camera no 2, streak camera no 3, optical circulator module, probe light Adopt the utility model provides a multi -functional laser fusion measuring device, novel structure, the utility model provides a multi -target detection system of automotive anti -collision radar The multi -target detection system comprises a radio -frequency transmitting/receiving part, a data processing part and a power supply part, the radio -frequency transmitting/receiving part comprises a radar sensor and a medium frequency signal processing module, the data processing part comprises an analog -to -digital and digital -to -analog conversion module and a central control processing module FPGA, and the radar sensor is a radar receiver in K band with a voltage -controlled oscillator and is provided with an individual sending channel and two I/Q receiving channels The multi -target detection system of the automotive anti -collision radar is capable of alternatively emitting two triangular waves with different modulation periods, collecting echo wave data, and effectively excluding fake targets based on a corresponding algorithm so as to improve the detection accuracy of multiple moving targets in an environment of strong noises A hardware system structure is simplified and is easy to achieve, the bare way of receipts that can share line VISAR traditional, traditional line VISAR interferometry shock wave speed module has been kept, through the probe laser that has improved light path make full use of, tracking probe optical absorption intensity changes with the shock wave interface when obtaining the interference beat frequency to calculate shock wave surface speed, and cooperate suitable image processing means, can be with acquireing more physical state information, be favorable to further physical state diagnosis research

Multi -functional laser fusion measuring device

The invention discloses a multifunctional laser fusion diagnostic interferometer, which comprises a lighting lens, a beam splitter 1, a beam splitter 2, an imaging lens 1, an imaging lens 2, an imaging lens 3, a streak camera 1, a streak camera 2, a streak camera 3, an optical circulator module, a probe optical image transmitting module, an interference module 1 and an interference module 2. The multifunctional laser fusion diagnostic interferometer provided by the invention has the advantages of novel structure and easy implementation, can share a light receiving optical path of a traditional linear VISAR, reserves an interference measurement shock wave velocity module of the traditional linear VISAR, fully utilizes probe laser by means of an improved optical path, tracks probe light absorption intensity and shock wave interference verification while acquiring interference beat frequency to calculate a shock wave surface velocity, cooperates with the appropriate image processing means, can acquire more pieces of state-of-matter information, and is conductive to carry out further state-of-matter diagnostic research.

Multifunctional laser fusion diagnostic interferometer

The invention discloses a wide-range shock wave velocity diagnosis device and a measurement method. The device comprises a shooting module, a light splitting module, an interference module and an imaging recording module. The interference module comprises at least two interference optical paths. The delay time of each interference optical path is in a multiple change relationship. The shooting module focuses an incident probe laser on a target surface, and introduces a probe laser which is provided with difference frequency information and is reflected by the target surface into the light splitting module. The probe laser is split by the light splitting module, and is introduced into each interference optical path. Each interference optical path generates a coherent light which is imaged and recorded by the imaging recording module. The wide-range shock wave velocity diagnosis device and the measurement method can meet both the accuracy requirement and the wide-range requirement when the shock wave velocity is measured.

Wang Feng

Papers

Enhanced X-ray photon response in solution-synthesized CsPbBr3 nanoparticles wrapped by reduced graphene oxide

Optical fiber image-transmitting bundle velocity interferometer and shock wave velocity calculation method

Multi -functional laser fusion measuring device

Multifunctional laser fusion diagnostic interferometer

Wide-range shock wave velocity diagnosis device and measurement method