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readout electronics of a prototype time-of-flight ion composition analyzer for space plasma

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Nuclear Science and Techniques 2018年第4期29卷 98-107页

作者： Di Yang Zhe Cao Xin-Jun Hao Yi-Ren Li Shu-Bin Liu Chang-Qing Feng Qi An State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Division of Space Physics University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Geospace Environment Hefei 230026 China

readout electronics is developed for a prototype time-of-flight(TOF) ion composition spectrometer for in situ measurement of the mass/charge distributions of major ion species from 200 to 100 ke V/e in space plasma.By utilizing a constant fraction discriminator(CFD) and time-to-digital converter(TDC), challenging dynamic range measurements were performed with high time resolution and event rates. CFD was employed to discriminate the TOF signals from the micro-channel plate and channel electron multipliers. TDC based on the combination of counter and OR-gate delay chain was designed in a highreliability flash field programmable gate array. Owing to the non-uniformity of the delay chain, a correction algorithm based on integral nonlinearity compensation was implemented to reduce the time uncertainty. The test results showed that the electronics achieved a low timingerror of readout electronic.

关键词： Space plasma Ion composition analyzer readout electronics Constant fraction discriminator Time-to-digital converter

readout electronics for a high-resolution soft X-ray spectrometer based on silicon drift detector

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Nuclear Science and Techniques 2017年第1期28卷 94-99页

作者： Er-Lei Chen Chang-Qing Feng Shu-Bin Liu Chun-Feng Ye Dong-Dong Jin Jian Lian Hui-Jun Hu State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China 705 Research Division Electronic Engineering InstituteHefei 230037 China Shandong Aerospace Electro-technology Institute Yantai 264670 China

The readout electronics for a prototype soft X-ray spectrometer based on silicon drift detector(SDD),for precisely measuring the energy and arrival time of X-ray photons is presented in this paper.The system mainly consists of two parts,i.e.,an analog electronics section(including a pre-amplifier,a signal shaper and filter,a constant fraction timing circuit,and a peak hold circuit)and a digital electronics section(including an ADC and a TDC).Test results with X-ray sources show that an energy dynamic range of 1-10 keV with an integral nonlinearity of less than 0.1%can be achieved,and the energy resolution is better than 160 eV @ 5.9 keV FWHM.Using a waveform generator,test results also indicate that time resolution of the electronics system is about 3.7 ns,which is much less than the transit time spread of SDD(<100 ns)and satisfies the requirements of future applications.

关键词： Energy and time measurement Soft X-ray detection Silicon drift detector readout electronics

Noise and mismatch optimization for capacitive MEMS readout

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Journal of Semiconductors 2009年第11期30卷 88-93页

作者：张翀吴其松尹韬杨海钢 Institute of Electronics Chinese Academy of Sciences Graduate University of the Chinese Academy of Sciences

This paper presents a high precision CMOS readout circuit for a capacitive MEMS gyroscope. A continuous time topology is employed as well as the chopper noise cancelling technique. A detailed analysis of the noise and mismatch of the capacitive readout circuit is given. The analysis and measurement results have shown that thermal noise dominates in the proposed circuit, and several approaches should be used for both noise and mismatch optimization. The circuit chip operates under a single 5 V supply, and has a measured capacitance resolution of 0.2 aF/√Hz. With such a readout circuit, the gyroscope can accurately measure the angular rate with a sensitivity of 15.3 mV/°/s.

关键词： high precision readout capacitive MEMS

Design of fast adaptive readout system for wire scanners

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Nuclear Science and Techniques 2018年第1期29卷 45-51页

作者： Qian-Shun She Yi Qian Jie Kong Hai-Bo Yang Hong-Yun Zhao Jing-Zhe Zhang Xiao-Yang Niu Jun-Xia Wu Hong Su Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049China

A new wide-range fast readout system capable of adaptive identification is designed for wire scanners,which are used to measure beam profiles and emittance.This system is capable of handling varying current signals with Gaussian distributions and current pulses up to 1000 counts/s, as well as an input current range of 1 n A–1 m A. When tested, the resolution was found to exceed 3.68% for full scale, the nonlinearity was found to be less than 0.11%, and the measurement sensibility was found to be less than 5 p A. We believe that the system will play a crucial role in improving the measurement accuracy of beam diagnosis and the efficiency of accelerator operation,as well as decreasing the time required for beam tuning.This system was applied to the beam diagnosis of an injector II prototype for an accelerator-driven subcritical system and produced excellent measurement results. A description of the adaptive fast readout system for wire scanners is presented in this paper.

关键词： Wire scanner Weak current measurement Adaptive identification Front-end readout electronics Beam diagnosis

Study of readout and cross-talks for multi-strip RPC with PSpice simulation

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Chinese Physics C 2008年第10期32卷 825-830页

作者：王亚平贺小春蔡勖 Institute of Particle Physics Central China Normal University Department of Physics and Astronomy Georgia State University

An electrical model for multi-strip resistive plate chamber （RPC） is presented, and a comparison between simulation results and test data is carried on. Based on the model, the influences of the RPC＇s design parameters on the readout are studied with PSpice simulation. Cross-talk （CT） phenomenon is observed and the relative amplitudes of the CT are studied for different design parameters.

关键词： RPC PSpice readout CT

A Low-Noise readout Circuit for Gyroscopes

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 42-45页

作者： Guanshi Wang Xiaowei Liu Changchun Dong Micro-Electromechanical System Center Harbin Institute of Technology

In order to suppress the noise of gyroscopes,the method based on lock-in amplifier and capacitor matching of the low-noise readout circuit is proposed. Firstly,the principle to suppress the noise by lock-in amplifier is analyzed,and the noise model of front end is proposed. Secondly,the noise optimization for the charge amplifier is presented according to the noise model of front end. Finally,a readout circuit is constructed by this approach. The measurement results show that the parasitic capacitance of front end is 18 p F,and the noise at resonant frequency( 4 k Hz) is 133 n V / Hz1 / 2,and the overall bias stability is 30° /h,and the noise level is 0. 003° /( s·Hz1 / 2). The noise of the gyroscope with the low-noise readout by this method is suppressed effectively.

关键词： low-noise noise optimization charge amplifier gyroscope readout

Super-Resolution Recording by an Organic Photochromic Mask Layer

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Chinese Physics Letters 2007年第4期24卷 994-997页

作者：石明赵生敏易家祥赵福群牛丽红李忠玉张复实 Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education Department of Chemistry TsJnghua University Beijing 100084 Lab of Printing & Packaging Material and Technology-Beijing Area Major Laboratory BeJjing Institute of Graphic Communication Beijing 102600

By using the super-resolution near-field structure （super-RENS） method, the super-resolution recording marks are obtained practically by an organic photochromic diarylethene mask layer, under much lower recording laser power of 0.45roW. The size of recording marks is decreased by 60% （from 1.6μm to 0.7μm） for a diarylethene （photo-mode） recording layer by the optical detection method （limited by optical diffraction）, or decreased by 97% （from 160Onto to 5Onto） for a heptaoxyl copper phthalocyanine （thermo-optical） recording layer, the latter is much smaller than the limitation of optical diffraction. In order to obtain a desirable result, a proper extent of photochemistry reaction in the mask layer is needed. Thus, the super-resolution recording marks can be obtained by adjusting the concentration of diarylethene in the mask layer, the recording laser power, and the moving speed of the sample disc.

关键词： OPTICAL DISKS FIELD APERTURE DENSITY STORAGE MEMORY FILM readout DYE

A novel family of diarylethene-phthalocyanine dyad systems for nondestructive data processing

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Science China Chemistry 2008年第3期51卷 263-268页

作者： CHEN ZiHui LI ZhongYu BIN YueJing HUANG Lei ZHANG FuShi Key Lab of Organic Optoelectronics&Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

A novel family of diarylethene (DTE)-phthalocyanine (Pc) dyad systems were designed and synthesized. It was found that the significant change in the extension of the linear π-conjugation of DTE when irradiated by 254 nm UV light directly made the absorption of the Q-band of phthalocyanine decrease. Detecting the absorption changes of the Q-band would not induce the reversible photochromic reaction. Therefore, non-destructive readout was feasible based on the spectral changes of the Q-band when such materials were used as storage media.

关键词： photochromism diarylethene phthalocyanine non-destructive readout

A 12-bit multichannel ADC for pixel detectors in particle physics and nuclear imaging

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Science China(Technological Sciences) 2010年第5期53卷 1208-1214页

作者： WEI Wei1,2,3,WANG Zheng1,3 & ZHAO JingWei1,3 1 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Key Lab of Nuclear Detection Technology and Nuclear Electronics of Chinese Academy of Sciences,Beijing 100049,China Institute of High Energy Physics Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China Key Lab of Nuclear Detection Technology and Nuclear Electronics of Chinese Academy of Sciences Beijing China

Modern pixel detectors in nuclear and particle physics experiments and also in nuclear imaging,starve for highly integrated application specified integrated circuit(ASIC),whereas in China the study of ASIC still stays far away from practical application.The lack of ASIC strictly limits the research and development of domestic high energy physics field.A 12-bit multichannel ADC designed for high density readout is introduced as a major candidate for solution.A precise model is discussed and the simulation fully agrees with the model,which indicates a key principle of design.Design is performed according to the given rule,and novel layout techniques are carried out.Measurement results in all aspects are also obtained,showing an excellent real performance,which satisfies the practical requirement.

关键词： application specified integrated circuit high density readout Wilkinson ADC multi-channel ADC