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Estimation of Hourly and Daily Global Solar Radiation at Clear Days Using an Approach Based on Modified Version of Gaussian Distribution 被引量:4
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作者 S.M EI shazly 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1996年第3期349-358,共10页
The performance of two models,Jam and Baig,based on the modified version of Gaussian distribution function in estimating the daily total of global solar radiation and its distribution through the hours of the day from... The performance of two models,Jam and Baig,based on the modified version of Gaussian distribution function in estimating the daily total of global solar radiation and its distribution through the hours of the day from sunrise to sunset al any clear day is evaluated with our own measured data in the period from June 1992 to May 1993 in Qena Egypt The results show a high relative deviation of calculated values from measured ones,especially for Jain model,in the most hours of the day,except for those near to local noon.This misfit behavior is quite obvious in the early morning and late afternoon A new approach has been proposed in this paper to estimate the daily and hourly global solar radiation This model performs with very high accuracy on the recorded data in our region.The validity of this approach was verified with new measurements in some clear days in June and August 1994.The resultant very low relative deviation of the calculated values of global solar radiation from the measured ones confirms the high performance of the approach proposed in this work 展开更多
关键词 Glohal solar radiation . Measurements Models Gaussian distribution function Statistical treatment
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Research on Solar Simulation System for Test of Solar Radiation Measuring Instrument 被引量:5
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作者 ZhengRu Zhang Guoyu +3 位作者 Lyu Wenhua Yan Jiajun Su Shi Zhang Jian 《Instrumentation》 2017年第1期3-11,共9页
Since traditional solar simulators are mainly applied to spacecraft and photovoltaic industry,they are not suitable for solar radiation measuring instrument test. Therefore,a deep research is carried out on solar simu... Since traditional solar simulators are mainly applied to spacecraft and photovoltaic industry,they are not suitable for solar radiation measuring instrument test. Therefore,a deep research is carried out on solar simulators to test of solar radiation measuring instrument,so that obtain the requirements of performance test of solar radiation measuring instrument. With a combination of the requirements for national regulations of metrological verification and performance test of pyranometer and pyrheliometer,it lays emphasis on the research of design methods for improving radiation uniformity and stability of solar simulators; it also focuses on design methods of multidimensional detection workbench,which achieves different detection of solar radiation. After practical test,solar irradiation is within Φ60 mm; irradiation non-uniformity is better than ±0.8%; instability is better than ±0.72%;rotating angle precision is better than 0.09°. Then,solar simulator is used to carry out pyranometer sensitivity test,pyranometer directional response test,pyranometer tilt response test and non-linearity test for radiation instruments. Test results showthat the solar simulator meets the testing requirements of solar radiation measuring instruments. 展开更多
关键词 Solar Simulation System Irradiation Non-uniformity Irradiation Stability Solar radiation Measuring Instrument TEST
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The definition analyses of radiation temperature measurement area
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作者 Fu Tairan Cheng Xiaofang Zhong Maohua 《Engineering Sciences》 EI 2008年第2期42-45,共4页
In the research of primary spectrum pyrometry, this paper discussed the definition problem of radiation temperature measurement area based on the measurement coordinates. For the linear spectrum emissivity model and i... In the research of primary spectrum pyrometry, this paper discussed the definition problem of radiation temperature measurement area based on the measurement coordinates. For the linear spectrum emissivity model and improved monotonic spectrum emissivity model, the characteristics of radiation temperature measurement area restricted by the measurement coordinates were theoretically analyzed, through the investigations of the temperature and emissivity coordinate axes. Choosing the specific primary spectrum pyrometer as an example in applications, the theoretical area of radiation temperature measurement of this pyrometer was given and it was verified through blackbody experiments. The discussions of this paper will provide the necessary foundation for the theory research development of primary spectrum pyrometry and the realization of technical applications. 展开更多
关键词 temperature EMISSIVITY radiation temperature measurement the measurement coordinates
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Dynamics of Environmental Ionizing Radiation between May to September 2016 in the Region of S^o Jos~ dos Campos, SP, Brazil
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作者 Inacio M. Martin Marcelo P. Gomes +5 位作者 Mauro A. Alves Alessandro de Abreu Franklin A. Silva Rodrigo R. F.Carvalho Joao P. Correa Bogos N. Sismanoglu 《Journal of Environmental Science and Engineering(B)》 2016年第9期451-456,共6页
Measurements of gamma radiation (200 keV to 10 MeV) were performed between May 25 to September 30 2016 at ITA (Technological Institute of Aeronautics) in Sao Jose dos Campos, SP, Brazil. Detector and associated el... Measurements of gamma radiation (200 keV to 10 MeV) were performed between May 25 to September 30 2016 at ITA (Technological Institute of Aeronautics) in Sao Jose dos Campos, SP, Brazil. Detector and associated electronics were previously calibrated in the laboratory of ITA using radioactive sources Cs-137, Po-210 and Sr-90. These sources provide gamma-ray energies in 0.662 keV alpha particles of 5.4 MeV and 0.90 keV electrons, respectively. Detector is a scintillator Sodium Iodide activated with Thallium [NaI(Tl)] associated to a photomultiplier and electronic devices which gather, store, distribute and structure data so users can analyze them. During the period of May-September, the experimental set was installed in an open room on a tower 25 meters above the ground. Measurements indicated variations of ionizing radiation in function of dry weather, rain, cold fronts passes and presence of fog in the area; the sample time interval was minute by minute. This study discusses the analysis and the dynamics of how to measure meteorological parameters using an ionizing radiation system. 展开更多
关键词 Ionizing radiation environmental study gamma radiation measurements.
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Study of a Portable Experimental Set for the Monitoring of Ionizing Radiation in the Tropical Region of Brazil
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作者 Inacio Malmonge Martin Marcelo Pego Gomes +1 位作者 Rodrigo Rezende Fernandes Carvalho and Rafael Gomes 《Journal of Environmental Science and Engineering(A)》 2017年第3期144-148,共5页
The Geiger is a proportional counter that detects the ambient ionizing radiation using a sensor tube and an associated electronics that allows feeding the desired voltage to the tube and acquiring the data in a certai... The Geiger is a proportional counter that detects the ambient ionizing radiation using a sensor tube and an associated electronics that allows feeding the desired voltage to the tube and acquiring the data in a certain time interval. With a sensor tube of Chinese and Russian origin and associated electronics based on the Arduino system, an experimental set of very low cost and easy handling for the monitoring of the local environmental ionizing radiation was set up. The main objective of this work is to disseminate this very low cost technique for the environmental study in secondary schools in Brazil. 展开更多
关键词 Ionizing radiation environmental study gamma radiation measurements.
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Editorial:Special issue on solar radiation measurement
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作者 Lyu Wenhua 《Instrumentation》 2017年第1期1-2,共2页
Solar energy is the electromagnetic energy emitted by the sun,w hich is the dominant energy driving the Earth’s climate system[1-2],the radiation fluxes to and from the Earth’s surface are crucial to the heat econom... Solar energy is the electromagnetic energy emitted by the sun,w hich is the dominant energy driving the Earth’s climate system[1-2],the radiation fluxes to and from the Earth’s surface are crucial to the heat economy of the Earth,tiny variations in solar radiation w ill produce natural forcing of Earth’s climate w ith global-and regional-scale responses[3-4],therefore,accurate solar radiation measurements are significant for the energy balance that determines the Earth’s climate[5].M oreover,w ith global energy crisis intensifies,the utilization of solar energy resource has been putting on more and more 展开更多
关键词 World In Editorial:Special issue on solar radiation measurement
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Measurements of non-equilibrium and equilibrium temperature behind a strong shock wave in simulated martian atmosphere 被引量:4
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作者 Xin Lin Xi-Long Yu +3 位作者 Fei Li Shao-Hua Zhang Jian-Guo Xin Xin-Yu Zhang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第5期1296-1302,共7页
Non-equilibrium radiation measurements behind strong shock wave for simulated Martian atmosphere are presented in this paper. The shock wave is established in a hydrogen oxygen combustion driven shock tube. Time- reso... Non-equilibrium radiation measurements behind strong shock wave for simulated Martian atmosphere are presented in this paper. The shock wave is established in a hydrogen oxygen combustion driven shock tube. Time- resolved spectra of the Av = 0 sequence of the B^2∑^+ → X^2∑^+ electronic transition of CN have been observed through optical emission spectroscopy (OES). A new method, which is based on fitting high resolution spectrum for rotational and vibrational temperatures measurement, is proposed to diag- nose temperature distribution behind the shock wave. It is estimated that the current scheme has the maximum deviation less than 8% (lσ) for vibrational temperature measurement through detailed analysis of the influence of the uncertainties of spectroscopic constants and spectral resolution. Radiation structure of the shock layer, including induction, relaxation and equilibrium process, and corresponding rotational and vibrational temperatures are obtained through time gating OES diagnostics with sub-microsecond temporal resolution. The present extensive results will strongly benefit the reaction rate estimation and computational fluid dynamics (CFD) code validation in high enthalpy Mars reentry chemistry. 展开更多
关键词 radiation measurements - Shock wave Marsre-entry Rotational temperature Vibrational temperature
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A Study of Linke Turbidity Factor over Qena / Egypt
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作者 Sayed M. Elshazly 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1996年第4期519-532,共14页
Data on instantaneous atmospheric Linke turbidity factor TL (m) are reported for clear days at Qena/Egypt in the period from June 1992 to May 1993.TL(m) is determined using the values of irradiance of direct solar rad... Data on instantaneous atmospheric Linke turbidity factor TL (m) are reported for clear days at Qena/Egypt in the period from June 1992 to May 1993.TL(m) is determined using the values of irradiance of direct solar radiation (I),which are calculated from global (G) and diffuse (D) - solar radiation measurements.Monthly and seasonally variations of both diurnal and daily average values of TL (m) increases steadily in the direction of sunset in the months from June to December 1992 as well as Summer and Autumn seasons,while it falls generally in this direction for the months from January to March and Winter season.In April and May,TL (m) fluctuates obviously through the day hours,it is also shown that the average values of TL(m) are particularly large during Summer months compared to other months of the year.This behavior of TL(m) is discussed in view of the variations of some weather elements,which affect the content of water vapor and dust particle in the atmosphere of the study region.It seems t be of similar trends to that of other locations inside and outside Egypt.The virtual variation of TL(m) is eliminated by reducing its value to relative optical air mass m=2,according to Kasten formula.The resulting TL (2) is more representative for the content of dust particles and water vapor in the atmosphere. 展开更多
关键词 TURBIDITY Linke turbidity factor Seasonal and diurnal variations Solar radiations components measurements AEROSOL
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Polarization Projection for 3D Geometry-Based Stochastic Channel Model
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作者 PANG Lihua ZHANG Yang +5 位作者 GONG Fengkui WANG Anyi XIAO Liyuan LIANG Xiao WANG Qiaofeng LI Jiandong 《China Communications》 SCIE CSCD 2015年第10期52-63,共12页
Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system designs.Being currently supported within3 D geometr... Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system designs.Being currently supported within3 D geometry-based stochastic channel models(GSCM),field patterns are technically obtained by chamber measurement(or by its best fitting).However,in some channel related performance analysis scenarios,design insight can be crystallized better by starting the derivations with theoretical co-polarization and cross-polarization components.Specifically,these two components are mathematically linked with field patterns through the proposed polarization projection algorithm.In this manuscript,we focus on revealing the transformation criterion of polarization states between the antenna plane and the propagation plane.In practice,it makes retrieving the field patterns by electromagnetic computation possible.Meanwhile,the impact imposed by distinct antenna orientations is geometrically illustrated and consequently incorporated into the proposed algorithm.This will further facilitate flexible performance evaluation of related radio transmission technologies.Our conclusions are verified by the closed-form expression of the dipole field pattern(via an analytical approach) and by chamber measurement results.Moreover,we find that its 2D degenerative case is aligned with the definitions in 3^(rd) generation partnership project(3GPP)technical report 25.996.The most obvious benefit of the proposed algorithm is to significantly reduce the cost on generating channel coefficients in GSCM simulation. 展开更多
关键词 polarization 3D geometry-based stochastic channel model antenna orientation radiation characteristics dipole chamber measurement channel simulation
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Research on the measurement and shielding methods of the spatial electromagnetic radiation of the BEPCⅡLinac 被引量:1
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作者 Hua Shi Xiang He +2 位作者 Jing-Dong Liu Jing-Ru Zhang Xiao-Ping Li 《Radiation Detection Technology and Methods》 CSCD 2022年第2期187-193,共7页
Purpose The research focuses on the related measurement and shielding works for solving the spatial electromagnetic radiation and interference problems of the BEPCⅡLinac.Methods The radiation frequency and intensity ... Purpose The research focuses on the related measurement and shielding works for solving the spatial electromagnetic radiation and interference problems of the BEPCⅡLinac.Methods The radiation frequency and intensity can be determined by using a set of antennas connected with a spectrum analyser.Results The source of the radiation is located on the cable connectors of some device panels.The radiation intensity is significantly reduced after wrapping the connectors with the radiation shielding tape.Conclusions The entire research process includes the selection of a domestically made ultra-wideband antenna,the proposal of the measurement methods,the locating of the radiation source,the performance measurement of the radiation shielding tape and the shielding of the radiation.It provides a whole set of feasible solutions for similar problems in accelerators. 展开更多
关键词 BEPCⅡ LINAC Spatial electromagnetic radiation radiation measurement radiation shielding Ultra-wideband antenna
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Bernoulli particle flter with observer altitude for maritime radiation source tracking in the presence of measurement uncertainty
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作者 Luo Xiaobo Fan Hongqi +1 位作者 Song Zhiyong Fu Qiang 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2013年第6期1459-1470,共12页
For maritime radiation source target tracking in particular electronic counter measures(ECM)environment,there exists two main problems which can deteriorate the tracking performance of traditional approaches.The frs... For maritime radiation source target tracking in particular electronic counter measures(ECM)environment,there exists two main problems which can deteriorate the tracking performance of traditional approaches.The frst problem is the poor observability of the radiation source.The second one is the measurement uncertainty which includes the uncertainty of the target appearing/disappearing and the detection uncertainty(false and missed detections).A novel approach is proposed in this paper for tracking maritime radiation source in the presence of measurement uncertainty.To solve the poor observability of maritime radiation source target,using the radiation source motion restriction,the observer altitude information is incorporated into the bearings-only tracking(BOT)method to obtain the unique target localization.Then the two uncertainties in the ECM environment are modeled by the random fnite set(RFS)theory and the Bernoulli fltering method with the observer altitude is adopted to solve the tracking problem of maritime radiation source in such context.Simulation experiments verify the validity of the proposed approach for tracking maritime radiation source,and also demonstrate the superiority of the method compared with the traditional integrated probabilistic data association(IPDA)method.The tracking performance under different conditions,particularly those involving different duration of radiation source opening and switching-off,indicates that the method to solve our problem is robust and effective. 展开更多
关键词 Bernoulli flter Maritime radiation source Measurement uncertainty Passive tracking Random fnite set
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Experimental measurement of radiation dose in a dedicated breast CT system
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作者 申善威 王燕芳 +5 位作者 舒航 唐晓 魏存峰 宋玉收 史戎坚 魏龙 《Chinese Physics C》 SCIE CAS CSCD 2014年第3期91-97,共7页
Radiation dose is an important performance indicator of a dedicated breast CT(DBCT).In this paper,the method of putting thermoluminescent dosimeters(TLD) into a breast shaped PMMA phantom to study the dose distrib... Radiation dose is an important performance indicator of a dedicated breast CT(DBCT).In this paper,the method of putting thermoluminescent dosimeters(TLD) into a breast shaped PMMA phantom to study the dose distribution in breasts was improved by using smaller TLDs and a new half-ellipsoid PMMA phantom.Then the weighted CT dose index(CTDI_w) was introduced to average glandular assessment in DBCT for the first time and two measurement modes were proposed for different sizes of breasts.The dose deviations caused by using cylindrical phantoms were simulated using the Monte Carlo method and a set of correction factors were calculated.The results of the confirmatory measurement with a cylindrical phantom(11 cm/8 cm) show that CTDI_w gives a relatively conservative overestimate of the average glandular dose comparing to the results of Monte Carlo simulation and TLDs measurement.But with better practicability and stability,the CTDI_w is suitable for dose evaluations in daily clinical practice.Both of the TLDs and CTDI_w measurements demonstrate that the radiation dose of our DBCT system is lower than conventional two-view mammography. 展开更多
关键词 dedicated breast CT radiation dose experimental measurement
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Optically stimulated luminescence of Dy^3+-doped NaCaPO4 glass-ceramics 被引量:3
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作者 Jie Xu Zhaoyang Chen +2 位作者 Minqiang Gai Yanwei Fan Chengfa He 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第9期927-932,I0001,共7页
Dy^3+-doped glass-ceramics containing NaCaPO4 crystals were successfully fabricated by heat treatment at base glass,and the luminescence properties were investigated for potential applications in radiation measurement... Dy^3+-doped glass-ceramics containing NaCaPO4 crystals were successfully fabricated by heat treatment at base glass,and the luminescence properties were investigated for potential applications in radiation measurements.The photo luminescence(PL)excitation and emission spectra exhibit transitions related to Dy^3+ions corresponding to the strongest excitation and emission wavelengths at 351 and 575 nm,respectively.The CW-OSL properties as a function of dopant concentration,pre-heating temperature,pre-heating time and signal fading were investigated.The most appropriate Dy^3+ion concentration was found to be 0.25 mol%.The TL glow curves have a broad peak feature peaking at 195±5℃.The fading of the OSL signal would keep stable in five days with the intensity value of about 76.11%.The samples also exhibit good signal reusability and a broad linear dose response range(0.02-1000 Gy). 展开更多
关键词 Optically stimulated luminescence GLASS-CERAMICS radiation measurements PHOTOLUMINESCENCE Rare earths
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The application analyses for primary spectrum pyrometer 被引量:2
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作者 FU TaiRan CHENG XiaoFang ZHONG MaoHua 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2007年第6期753-765,共13页
In the applications of primary spectrum pyrometry,based on the dynamic range and the minimum sensibility of the sensor,the application issues,such as the measurement range and the measurement partition,were investigat... In the applications of primary spectrum pyrometry,based on the dynamic range and the minimum sensibility of the sensor,the application issues,such as the measurement range and the measurement partition,were investigated through theoretical analyses. For a developed primary spectrum pyrometer,the theoretical predictions of measurement range and the distributions of measurement partition were presented through numerical simulations. And the measurement experiments of high-temperature blackbody and standard temperature lamp were processed to further verify the above theoretical analyses and numerical results. Therefore the research in the paper provides the helpful supports for the applications of primary spectrum pyrometer and other radiation pyrometers. 展开更多
关键词 primary spectrum pyrometry radiation temperature measurement temperature EMISSIVITY measurement range measurement partition
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Measuring boundary-layer height under clear and cloudy conditions using three instruments 被引量:2
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作者 Chenggang Wang Hongrong Shi +2 位作者 Lianji Jin Hongbin Chen Huayang Wen 《Particuology》 SCIE EI CAS CSCD 2016年第5期15-21,共7页
Boundary-layer height (BLH) under clear, altostratus and low stratus cloud conditions were measured by GPS sounding, wind profiler radar, and micro-pulse lidar during the atmospheric radiation measurement experiment... Boundary-layer height (BLH) under clear, altostratus and low stratus cloud conditions were measured by GPS sounding, wind profiler radar, and micro-pulse lidar during the atmospheric radiation measurement experiment from Sep. to Dec. 2008 in Shouxian, Anhui, China. Results showed that during daytime or nighttime, regardless of cloud conditions, the GPS sounding was the most accurate method for measuring BLH. Unfortunately, because of the long time gap between launchings, sounding data did not capture the diurnal evolution of the BLH. Thus, wind profile radar emerged as a promising instrument for direct and continuous measurement of the mixing height during the daytime, accurately determining BLH using the structure parameter of the electromagnetic refractive index. However, during nighttime, radar was limited by weak signal extraction and did not work well for determining the BLH of the stable boundary layer, often recording the BLH of the residual layer. While micro-pulse lidar recorded the evolution of BLH, it overestimated the BLH of the stable boundary layer. This method also failed to work under cloudy conditions because of the influence of water vapor. Future work needs to develop a method to determine BLH that combines the complimentary features of all three algorithms. 展开更多
关键词 Boundary-layer height Atmospheric radiation measurement experiment GPS sounding Wind profile radar Micro-pulse lidar
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Direct measurement of the linear energy transfer of ions in silicon for space application 被引量:2
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作者 CHEN HongFei YU XiangQian +7 位作者 SHAO SiPei SHI WeiHong CUI ZhanGuo XIANG HongWen HAO ZhiHua ZOU JiQing ZHONG WeiYing ZOU Hong 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2016年第1期128-134,共7页
The single event effect(SEE) is an important consideration in electronic devices used in space environments because it can lead to spacecraft anomalies and failures. The linear energy transfer(LET) of ions is commonly... The single event effect(SEE) is an important consideration in electronic devices used in space environments because it can lead to spacecraft anomalies and failures. The linear energy transfer(LET) of ions is commonly investigated in studies of SEE. The use of a thin detector is an economical way of directly measuring the LET in space. An LET telescope consists of a thin detector as the front detector(D1), along with a back detector that indicates whether D1 was penetrated. The particle radiation effect monitor(PREM) introduced in this paper is designed to categorize the LET into four bins of 0.2–0.4, 0.4–1.0, 1.0–2.0 and 2.0–20 Me V·cm^2/mg, and one integral bin of LET>20 Me V·cm^2/mg. After calibration with heavy ions and Geant4 analysis, the LET boundaries of the first four bins are determined to be 0.236, 0.479, 1.196, 2.254, and 17.551 Me V·cm^2/mg, whereas that of the integral bin is determined to be LET>14.790 Me V·cm^2/mg. The acceptances are calculated by Geant4 analysis as 0.452, 0.451, 0.476, 0.446, and 1.334, respectively. The LET accuracy is shown to depend on the thickness of D1; as D1 is made thinner, the accuracy of the measured values increases. 展开更多
关键词 linear energy transfer measurement LET single event effect space radiation
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Measurement of acoustic field radiated by low frequency power ultrasonic transducer with laser-interferometer 被引量:2
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作者 QIAN Menglu GAO Wen HU Wenxiang (Institute of Acoustics, Tongji University Shanghai 200092) 《Chinese Journal of Acoustics》 2000年第4期299-308,共10页
Based on the piezo-optic effect of medium, the refractive index of medium is the function of its density, and so it's also the function of acoustic pressure. Therefore, acoustic pressure in the optical path everyw... Based on the piezo-optic effect of medium, the refractive index of medium is the function of its density, and so it's also the function of acoustic pressure. Therefore, acoustic pressure in the optical path everywhere can be determined absolutely by laser-interferometric technique and relative distribution of pressure in the middle and far acoustic field, which can be obtained from theory or experiment respectively. Theory and experiment of measurement of pressure in acoustic field with laser-interferometer are introduced. Distribution of pressure radiated by a power ultrasonic transducer is determined by laser interferometric technique. The theoretical and experimental results are in good agreement. The receiving sensitivity of a PVDF (Polyvinylidene fluoride) transducer in free field is also calibrated absolutely due to above results and its sensitivity is -118.5 dB. 展开更多
关键词 Measurement of acoustic field radiated by low frequency power ultrasonic transducer with laser-interferometer
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Dose-rate dependence of optically stimulated luminescence signal
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作者 卫平强 陈朝阳 +2 位作者 范艳伟 孙玉润 赵云 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2010年第10期1-4,共4页
Optically stimulated luminescence (OSL) is the luminescence emitted from a semiconductor during its exposure to light. The OSL intensity is a function of the total dose absorbed by the sample. The dose-rate dependen... Optically stimulated luminescence (OSL) is the luminescence emitted from a semiconductor during its exposure to light. The OSL intensity is a function of the total dose absorbed by the sample. The dose-rate dependence of the OSL signal of the semiconductor CaS doped Ce and Sm was studied by numerical simulation and experiments. Based on a one-trap/one-center model, the whole OSL process was represented by a series of differential equations. The dose-rate properties of the materials were acquired theoretically by solving the equations. Good coherence was achieved between numerical simulation and experiments, both of which showed that the OSL signal was independent of dose rate. This result validates that when using OSL as a dosimetry technique, the dose-rate effect can be neglected. 展开更多
关键词 optically stimulated luminescence DOSE-RATE numerical simulation radiation measurement
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Parallel readout of two-element CdZnTe detectors with real-time digital signal processing
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作者 施朱斌 王林军 +6 位作者 秦凯丰 闵嘉华 张继军 梁小燕 黄健 唐可 夏义本 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2010年第12期83-86,共4页
Readout electronics, especially digital electronics, for two-element CdZnTe (CZT) detectors in parallel are developed. The preliminary results show the detection efficiency of the two-element CZT detectors in parall... Readout electronics, especially digital electronics, for two-element CdZnTe (CZT) detectors in parallel are developed. The preliminary results show the detection efficiency of the two-element CZT detectors in parallel with analog electronics is as many as 1.8 and 2.1 times the single ones, and the energy resolution (FWHM) is limited by that of the single one by the means of analog electronics. However, the digital method for signal processing will be sufficiently better by contrast with an analog method especially in energy resolution. The energy resolution by the means of digital electronics can be improved by about 26.67%, compared to that only with analog electronics, while their detection efficiency is almost the same. The cause for this difference is also discussed. 展开更多
关键词 CdZnTe detectors detectors in parallel digital method radiation measurement
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