ACCURACY OF MEASUREMENT OF NATURAL GAMMA RAY SPECTRA BY HD－8004 NaI（T1）GAMMA SPECTROMETER

ＡＣＣＵＲＡＣＹ　ＯＦ　ＭＥＡＳＵＲＥＭＥＮＴ　ＯＦ　ＮＡＴＵＲＡＬ　ＧＡＭＭＡ　ＲＡＹ　ＳＰＥＣＴＲＡ　ＢＹ　ＨＤ－８００４　ＮａＩ（Ｔ１）ＧＡＭＭＡ　ＳＰＥＣＴＲＯＭＥＴＥＲＺｈｕＧｕｏｑｉｎ（朱国钦）ａｎｄＺｈｅｎｇＲｅｎｓｈｕ（郑仁淑）（Ｄｅ...     

STUDY ON BEHAVIOUR OF CR FORMULATION OF THIOBENCANB IN A MODEL PADDY FIE

ＳＴＵＤＹＯＮＢＥＨＡＶＩＯＵＲＯＦＣＲＦＯＲＭＵＬＡＴＩＯＮＯＦＴＨＩＯＢＥＮＣＡＮＢＩＮＡＭＯＤＥＬＰＡＤＤＹＦＩＥＬＤＳｕｎＪｉｎｈｅ（孙锦荷）；ＬｉＸｉｎｇｍｉｎｇ（李兴明）；ＣｈｅｎＺｉｙｕａｎ（陈子元）ａｎｄＺｈａｎｇＱｉｎｚｈｅｎｇ（张...     

DETERMINATION OF SUPERFICAL ABSORBED DOSE FROMEXTERNAL EXPOSURE OF WEAKLY PENETRATING RADEATIONS

ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＳＵＰＥＲＦＩＣＡＬＡＢＳＯＲＢＥＤＤＯＳＥＦＲＯＭＥＸＴＥＲＮＡＬＥＸＰＯＳＵＲＥＯＦＷＥＡＫＬＹＰＥＮＥＴＲＡＴＩＮＧＲＡＤＥＡＴＩＯＮＳＣｈｅｎＬｉｓｈｕ（陈丽姝）（ＣｈｉｎａＩｎｓｔｉｔｕｔｅｏｆＡｔｏｍｉｃＥｎ...     

A DYNAMIC FOOD CHAIN MODEL FOR HONG KONG BASED ON RADFOOD MODEL AND BIRCHALL－JAMES ALGORITHM

Ａ　ＤＹＮＡＭＩＣ　ＦＯＯＤ　ＣＨＡＩＮ　ＭＯＤＥＬ　ＦＯＲ　ＨＯＮＧ　ＫＯＮＧ　ＢＡＳＥＤ　ＯＮ　ＲＡＤＦＯＯＤ　ＭＯＤＥＬ　ＡＮＤ　ＢＩＲＣＨＡＬＬ－ＪＡＭＥＳ　ＡＬＧＯＲＩＴＨＭＫ．Ｎ．Ｙｕ（余君岳）；Ｋ．Ｐ．Ｎｇ（吴国斌）；Ｔ．Ｃｈｅｕｎｇ（...     

BODY SURFACE EXPOSURE DISTRIBUTION OF EXAMINEES RECEIVED UPPER G．I．T．X－RAY EXAMINATION

ＢＯＤＹ　ＳＵＲＦＡＣＥ　ＥＸＰＯＳＵＲＥ　ＤＩＳＴＲＩＢＵＴＩＯＮ　ＯＦ　ＥＸＡＭＩＮＥＥＳ　ＲＥＣＥＩＶＥＤ　ＵＰＰＥＲ　Ｇ．Ｉ．Ｔ．Ｘ－ＲＡＹ　ＥＸＡＭＩＮＡＴＩＯＮＦｅｎｇＤｉｎｇｈｕａ（冯定华）ａｎｄＣｈｅｎｇＱｉｊｕｎ（程祺钧）（Ｆａｃｕ...     

SPECT心血池显像评价阿霉素心肌毒性的价值

选择４９例非何杰金淋巴瘤和小细胞肺癌等患者，采用常规ＣＨＯＰ和ＣＡＶ方案进行的治疗，定期用ＳＰＥＣＴ检测患者左心功能，评价阿霉素（ＡＤＭ）对心肌的毒性作用，结果表明，化疗前后ＥＦ（射血分数）ＰＥＲ（高峰射血率）和ＰＦＲ（高峰充盈率）值比较，差别有显著性（Ｐ〈０．０５），体内的ＡＤＭ累积量愈大，ＥＦ，ＰＥＲ和ＰＦＲ值下降愈大，并以ＰＦＲ变化最敏感，提示ＳＰＥＣＴ心功能测定是评价患者ＡＤＭ心肌毒性的每     

OVERVIEW OF ENVIRONMENTAL ASSESSMENT FOR CHINANUCLEAR POWER INDUSTRY AND COAL－FIRED POWER INDUSTRY

ＯＶＥＲＶＩＥＷＯＦＥＮＶＩＲＯＮＭＥＮＴＡＬＡＳＳＥＳＳＭＥＮＴＦＯＲＣＨＩＮＡＮＵＣＬＥＡＲＰＯＷＥＲＩＮＤＵＳＴＲＹＡＮＤＣＯＡＬ－ＦＩＲＥＤＰＯＷＥＲＩＮＤＵＳＴＲＹＺｈａｎｇＳｈａｏｄｏｎｇ（张少东）；ＰａｎＺｉｑｉａｎｇ（潘自强）ａｎｄＺ...     

基于DSP的智能模数变换插件设计

介绍了一个基于ＤＳＰ，用于采集北京谱仪实验数据的智能模数变换插件的设计方法。此插件是为替代ＳＬＡＣ于８０年代生产的类产品而设计的。插件上的ＤＳＰ实现了实时数据预处理功能。同时使用了ＦＰＧＡ构造ＶＭＥ总线接口，提高了集成度。     

EFFECT OF THE RATIO Th/U ON TL DATING ACCURACY

ＥＦＦＥＣＴＯＦＴＨＥＲＡＴＩＯＴｈ／ＵＯＮＴＬＤＡＴＩＮＧＡＣＣＵＲＡＣＹ￥Ｐ．Ｌ．Ｌｅｕｎｇ（梁宝鎏）；ＭｉｃｈａｅｌＪ．Ｓｔｏｋｅｓ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓａｎｄＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ，ＣｉｔｙＰｏｌｙｔｅｃｈｎｉｃｏ...     

STUDY ON RESIDUES OF ~（14）C－FENITROTHION IN MODEL RICE－FISH ECOSYSTEM AND FIELD RICE－FISH ECOSYSTEM

ＳＴＵＤＹＯＮＲＥＳＩＤＵＥＳＯＦ~（１４）Ｃ－ＦＥＮＩＴＲＯＴＨＩＯＮＩＮＭＯＤＥＬＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＡＮＤＦＩＥＬＤＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＺｈａｎｇＺｈｏｎｇｌｉａｎｇ（张仲良）；ＷａｎｇＨｕａｘｉｎ（王化新）；Ｇ?..     

New data acquisition system for the focal plane polarimeter of theGrand Raiden spectrometer

This paper describes a new data acquisition system for the focal plane polarimeter of the Grand Raiden spectrometer at the Research Center for Nuclear Physics (RCNP) in Osaka, Japan. Data are acquired by a Creative Electronic Systems (CES) Starburst, which is a CAMAC auxiliary crate controller equipped with a Digital Equipment Corporation (DEC) J11 microprocessor. The data on the Starburst are transferred to a VME single-board computer. A VME reflective memory module broadcasts the data to other systems through a fiber-optic link. A data transfer rate of 2.0 Mbytes/s between VME modules has been achieved by reflective memories. This rate includes the overhead of buffer management. The overall transfer rate, however, is limited by the performance of the Starburst to about 160 Kbytes/s at maximum. In order to further improve the system performance, we developed a new readout module called the Rapid Data Transfer Module (RDTM). RDTM's transfer data from LeCroy PCOS III's or 4298's, and FERA/FERET's directly to CES 8170 High Speed Memories (HSM) in VME crates, the data transfer rate of the RDTM from PCOS III's to the HSM is about 4 Mbytes/s     

PandaX-nT暗物质探测实验读出电子学预研系统的研制

PandaX-nT升级对电子学系统提出了诸多新的挑战,如更多的通道数、高速高精度的波形数字化、灵活的触发算法和更高的数据带宽要求等。本文介绍一种为未来PandaX-nT暗物质直接探测升级实验预研的读出电子学系统。该电子学系统主要由前置放大电路模块、波形数字化模块(FDM)、数据获取模块(DAQ)和时钟分发模块等组成。FDM集成8路14 bit@1 GS/s ADC,具有较高集成度,可实现对探测器信号波形数字化,并通过光纤与DAQ通信。DAQ可汇总多块FDM数据,实现全数字化的触发算法,并通过基于TCP协议的千兆以太网与计算机通信,保证了数据传输的可靠与稳定。目前已完成了整个读出电子学系统设计,并对整个电子学系统进行了功能验证,以及与探测器进行了初步的联合测试。整个电子学系统具有较高的可扩展性,并能实现更复杂的触发算法,能满足下一代升级的需求。     

New CAMAC based data acquisition and beam control system for Lund nuclear microprobe

A new CAMAC based data acquisition system has been installed at the Lund Nuclear Microprobe facility. This paper reports on the development and present status of the data acquisition system. The system is a true multiparameter CAMAC based system with fast Fera bus readout and in crate memory buffer. The user interface is based on Sparrow Kmax software for a Power Macintosh platform. The system read out and tag the event data with position on-line, which make fast on-line monitoring of spectra or element maps possible.Simultaneously, all data can be saved event by event for off-line analysis. The beam scanning part is software controlled through a timed D/A converter, this allows fast scanning of the beam. With a CCD-camera and video card the area to be analysed could be defined directly from the image, and the sample position can be moved. Any kind of irregular scan patterns could be defined.     

激光诱导原子电离实验中的多定标数据获取系统

简要介绍了一套应用于激光诱导原子电离实验中的多定标数据获取系统,获取系统分为前端CAMAC自动获取与通过网络连接的后台数据存储两部分,其特点是用户更改数据读出表文件而可以任意添加CAMAC前端中的定标器个数,也可以增加用于能量测量的ADC等实现多参数在线获取,获得的数据按照列表型ASCⅡ格式存放在微机硬盘中.     

Computer Controlled CAMAC Systems at Argonne

Several computer controlled CAMAC systems are presently being developed at Argonne for data acquisition in low-energy nuclear physics. This paper discusses four of these. The systems are designed around 8K, 16-bit, Lockheed MAC-16 computers. A typical system includes two CAMAC crates and a complement of 15 modules. The crate controller in each crate serves as interface between the computer I/O bus and the CAMAC dataway. Up to 14 individual crates can be addressed in addition to a Teletype and other peripheral devices. The CAMAC modules being developed include Crate Controller, Dual ADC Controller, ADC Coincidence Unit, Dual Stabilizer, Quad Pre-Scaler, Clock, Display Controller, Readout Selector, Magnetic Tape Controller and Disk Controller. Most units are built in double-width modules using computer controlled wire-wrap construction.     

Summary of CAMAC: Status and Outlook

Is everyone going to use CAMAC? Probably not. Does CAMAC represent the latest thinking in data handling? Again the answer is no. However, one must remember that the time from conception to delivery of a computer makes it partially obsolete before it is ever used. This is the price of progress. A similar gestation time is inevitable for CAMAC. If we were to begin today, CAMAC would be different, but at this point in time we cannot start over. CAMAC is the only system with any chance of wide-spread acceptance in the near future. We intend to take advantage of its opportunities right away.     

FASTBUS—CAMAC数据采集系统在宇宙线EAS实验中的应用

本文以中日合作西藏羊八井宇宙线ＥＡＳ实验所使用的ＦＡＳＴＢＵＳ－ＣＡＭＡＣ混合数据采集系统为例，介绍了ＦＡＳＴＢＵＳ总线的主要特点，功能模块、控制模块以及与ＰＣ的接口功能和控制方法，并对ＦＡＳＴＢＵＳ的具体应用进行了深入的分析。     

Development of readout electronics for bunch arrival-time monitor system at SXFEL

A bunch arrival-time monitor(BAM) system,based on electro-optical intensity modulation scheme, is under study at Shanghai Soft X-ray Free Electron Laser.The aim of the study is to achieve high-precision time measurement for minimizing bunch fluctuations. A readout electronics is developed to fulfill the requirements of the BAM system. The readout electronics is mainly composed of a signal conditioning circuit, field-programmable gate array(FPGA), mezzanine card(FMC150), and powerful FPGA carrier board. The signal conditioning circuit converts the laser pulses into electrical pulse signals using a photodiode. Thereafter, it performs splitting and low-noise amplification to achieve the best voltage sampling performance of the dual-channel analog-to-digital converter(ADC) in FMC150. The FMC150 ADC daughter card includes a 14-bit 250 Msps dual-channel high-speed ADC,a clock configuration, and a management module. The powerful FPGA carrier board is a commercial high-performance Xilinx Kintex-7 FPGA evaluation board. To achieve clock and data alignment for ADC data capture at a high sampling rate, we used ISERDES, IDELAY, and dedicated carry-in resources in the Kintex-7 FPGA. This paper presents a detailed development of the readout electronics in the BAM system and its performance.     

Sumary of CAMAC: Status and Outlook

Is everyone going to use CAMAC? Probably not. Does CAMAC represent all the latest thinking in data handling? Again the answer is no. However, one must remember that the time from conception to delivery of a computer makes it partially obsolete before it is ever used. This is the price of progress. A similar gestation time was inevitable for CAMAC. If we were to begin today, CAMAC would be different, but at this point in time we are glad we don't have to start over again. CAMAC has proved its worth in many experimental research situations. Also CAMAC is dynamic; as new technology beccmes available it will obviously be incorporated into the system. Now is the time to take it to the industrial market place. The predominant use of CAMAC should be in industrial data-acquisition and control environments.     

γ-γ符合测量系统的新型前端读出电路研制

研制了一种新型前端读出电路,用于重离子治癌装置中符合测量原型系统的研究和测试。电路主要包括能量链、时间链和数据处理单元。能量链由截止频率7 MHz的抗混叠滤波器和模数转换器(ADC)组成,形成波形采样电路;时间链由高速比较器构成的定时甄别电路和时间数字转换器（TDC）组成;数据处理单元基于现场可编程门阵列(FPGA)设计实现。电路的线性度优于0.8%,噪声小于0.8 mV（RMS）。配合LaBr3单晶体条测试,能量分辨为4.5%（FWHM）,在与LYSO晶体阵列配合测试时,位置映射散点图清晰。该前端读出电路性能优于CAMAC系统,具有较好的实际应用前景。