A5101540884- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Advanced optical system design
- Advanced Optical Imaging Technologies
- Radiation Effects in Electronics
- Photoacoustic and Ultrasonic Imaging
- Advanced Optical Sensing Technologies
- Adaptive optics and wavefront sensing
- Ocular and Laser Science Research
- Magnetic confinement fusion research
- Optical measurement and interference techniques
- Astronomical Observations and Instrumentation
- Acoustic Wave Resonator Technologies
- Optical Coherence Tomography Applications
- Advancements in PLL and VCO Technologies
- Microwave Engineering and Waveguides
- Photocathodes and Microchannel Plates
- Advanced Fiber Laser Technologies
- Random lasers and scattering media
- Gyrotron and Vacuum Electronics Research
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Atomic and Subatomic Physics Research
- Image Enhancement Techniques
Beijing Aerospace Flight Control Center
2023-2024
Institute of Modern Physics
2018-2023
Chinese Academy of Sciences
2018-2023
University of Chinese Academy of Sciences
2020-2023
Institute of Microelectronics
2023
University of Electronic Science and Technology of China
2021
Institute of Optics and Electronics, Chinese Academy of Sciences
2021
Double microlens arrays (MLAs) in series can be used to divide and superpose laser beam so as achieve a homogenized spot. However, for homogenization with high coherence, the periodic lattice distribution spot will generated due periodicity of traditional MLA, which greatly reduces uniformity To solve this problem, monolithic highly integrated double-sided random array (D-rMLA) is proposed purpose achieving homogenization. The MLA disturbed by closely arranged structures apertures. And...
When the high coherence laser beam is homogenized by microlens array (MLA), interference fringes will be generated reducing uniformity of spot. A novel close packed random rectangular (rRMLA) proposed to solve this problem. By designing MLA with apertures and focal lengths sub-lenses, phase regulation can realized, so as disturb coherent superposition for improving uniformity. To realize dense arrangement a aperture, an iterative segmentation method design structure rRMLA controllable...
Micro-Doppler time-frequency analysis has been regarded as an important parameter extraction method for conical micro-motion objects. However, the micro-Doppler effect caused by can modulate frequency of lidar echo, leading to coupling between structure and parameters. Therefore, it is difficult extract parameters cones. We propose a new combining range profile cone spectrum. This effectively decouple accurately Compared with traditional methods, accuracy higher, information richer. Firstly,...
Microlenses can be widely used in integrated micro-optical systems. However, some special applications, such as light field imaging systems, multifocal microlens arrays (MLA) are expected to improve resolution. For the fabrication of MLA, traditional method is no longer applicable. To solve this problem, a MLA by one step exposure process proposed. Through analyses and research photoresist AZ9260, nonlinear relationship between dose depth established. In design mask, mask pattern corrected...
The new wide-range readout electronics with a self-calibration function are designed for ionization chambers (ICs) in the slow extraction of high-intensity heavy-ion accelerator facility (HIAF), booster ring (BRing). These consist programmable trans-impedance amplifier (TIA), circuit, an 18-bit analog-to-digital converter (ADC), and ZYNQ-7015 field-programmable gate array (FPGA). It is capable monitoring weak current signals 40 pA–4 mA sampling rate 5 MHz. FPGA manages operation mode analog...
A new 128-channel readout system is designed for a multistrip ionization chamber (MSIC) of the Proton radiation effects facility (PREF) end station. This consists 128 ultralow noise analog front-ends (AFEs), 16 eight-channel 60 Msps simultaneous sampling analog-to-digital converters (ADCs), 8 Kintex-7 field-programmable gate arrays (FPGA), and Zynq FPGA. It capable monitoring weak current signals 25 pA– <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
3D imaging technology has wide applications in fields such as autonomous driving and engineering surveying. Among them, TOF (Time of Flight) binocular vision are the two most commonly used methods. This study investigated influence distance light intensity on ranging accuracy methods theoretically experimentally. An adaptive weighting-based high-precision range image generation method for entire was proposed. The basic idea to assign different weights at intervals use prior weight fitting...
Abstract A novel all-optical scheme for fast modulation of Fano-like resonance using Er/Yb doped fiber (EYDF) is proposed and demonstrated experimentally. In the integrated system, an apodized Bragg grating (AFBG) inserted into one arm Mach–Zehnder interferometer (MZI), asymmetric resonances generated by interference between MZI mode AFBG mode. addition, a section EYDF other to control phase difference two arms MZI. By adjusting power optical pump applied EYDF, transmission spectrum...
To meet the high time-resolution requirements of a fast ionization profile monitor (IPM), 64-channel electrical signal acquisition system with response frequency 1 MHz has been developed. This article initially describes an ultralow noise transimpedance amplifier, which is analog front-end (AFE) electronics aiming to achieve balance between accuracy and bandwidth, as well truly reflect microstructure short beam pulses. Subsequently, synchronized multichannel data transmission based on...
The development, performance, and testing of the longitudinal bunch shape monitor, namely, Fast Faraday Cup (FFC), are presented in this paper. FFC is an invasive instrument controlled by a stepper motor, its principle operation based on strip line structure. was determined sampling small part beam hitting through 1-mm hole. rise time detector reached 24 ps. To accommodate experiments that utilize high-intensity beams, materials monitor were chosen to sustain high temperatures. Water cooling...
Beam energy is a key property to determine the accelerator performance. A real-time and non-destructive method should be used for measurement. In this paper, an measurement system based on Experimental physics industrial control systems (EIPCS) designed developed proton LINAC. The original signals are from beam position monitor, which give us phase information through its electronics. An algorithm deduced. Based EPICS, client completes data acquisition, IOC achieves algorithms, last whole...
A new digital beam position and phase measurement (BPM) system was designed for the ion-Linac accelerator at high intensity heavy ion facility. The fundamental second harmonic signals are retrieved from BPM electrodes to simultaneously calculate their respective positions phases. All data acquisition signal processing algorithm routines performed in a field programmable gate array (FPGA). information obtained by using in-phase quadrature demodulation method. practical straightforward method...
In this paper, a new 0.15-2 GHz broadband phase shifter with 9-bit resolution is presented. This digital adjustable implemented by utilizing the signal vector summation technology. The consists of one 90° hybrid coupler, two attenuators, 180° couplers, microwave switches, and combiner. By adjusting attenuation value device creates minimum 0.7° stepped shift. addition, switching 360° range shift achieved while almost keeping amplitude constant. measurement results show that proposed achieves...