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使用双通道穆斯堡尔谱仪同时测得两个穆斯堡尔谱是提高工作效率的一种有效途径。如果在通常的单通道穆斯堡尔谱仪的驱动器两端各加一个放射源,用两个探测器分别测取两个样品的穆斯堡尔谱,同时存储于一台多道分析器中,则组成了所说的双通道穆斯堡尔谱仪。如果使用带有透射窗的背散射探测器,使用一个放射源就可组成另一种形式的双通道穆斯堡尔谱仪,且有利于吸收谱与背散射谱同时测量。可见,把单通道穆斯堡尔谱仪改装 相似文献
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本文描述了用8031单片机组成的穆斯堡尔谱仪的数据采集和传输系统的硬件和软件,系统道数为512道,每道计数容量为10^8-1。与IBMPC/XT及其兼容机相连构成计算机穆斯堡尔谱仪。 相似文献
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本文描述了用8031单片机组成的穆斯堡尔谱仪的数据采集和传输系统的硬件和软件。系统道数为512道,每道计数容量为10^8-1。系统直接与IBMPC/XT及其兼容机相连构成计算机穆斯堡尔谱仪。 相似文献
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本文叙述了背射式穆斯堡尔谱仪用的β共振探测器的工作原理、特点、结构和它的性能,通过实测得到了不锈钢、铁板、α铁的穆斯堡尔背散射谱。 相似文献
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基于LabVIEW软件平台,采用虚拟仪器技术,开发了上位机软件。该软件由通信模块、参数控制模块和能谱处理模块组成,实现了对γ谱仪进行采集控制和对谱数据进行能量刻度、寻峰、核素查找等分析。实验表明:基于LabVIEW的上位机软件设计,可缩短软件的开发周期、节约开发成本、增强灵活性。 相似文献
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简要介绍一个针对多路谱仪放大器的读出与数据采集方法与系统.该系统基于16通道门积分/选通输出电路和通用PⅪ-AQ卡构建.利用Lab Windows/CⅥ平台构建虚拟仪器,灵活地将计算机、硬件、软件结合起来,设计了一个读出与数据采集系统.在该系统中,一个ADC通道可以面对16个谱仪放大器的输出,有效地提高了系统的集成度,降低了数据采集系统的成本.该设计为利用通用型谱仪放大器构建数百参数的信号读出与数据采集系统提供了一种新的方法.通过实验验证,证明该系统具有智能化、可靠性高、实时性强、成本低等优点. 相似文献
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《IEEE transactions on nuclear science》2005,52(4):854-860
A complete four channel acquisition system for high-resolution spectroscopy has been designed and realized. The analog section is composed of four semi-Gaussian shaping amplifiers with two software-selectable shaping times. The shaping times (150 and 450 ns) were chosen to perform either high rate or best resolution XRF measurements with state-of-the-art multielement silicon drift detector. The pulses' amplitudes are caught by four large-bandwidth peak-stretchers whose outputs are multiplexed into a single 10 MHz 12-bit analog-to-digital converter (ADC). A field-programmable gate array (FPGA) operating at 24 MHz (or 48 MHz) clock frequency controls the whole process and stores the four spectra in the on-chip RAM, thus guaranteeing a maximum counting rate per bin of 332 kcps and an overall counting rate in excess of 4 Mcps. The system interfaces the host PC by means of the enhanced parallel port with a custom made control software for data visualization and analysis as in a conventional MCA system. If more than four channels have to be managed, various boards can be operated in parallel on the same EPP bus. 相似文献
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Pinot L. Sellem R. Cuzon J.C. Lesage A. Mastrippolito R. Valentin L. 《IEEE transactions on nuclear science》2003,50(2):272-277
TOHR is a high-resolution nuclear tomography system dedicated to imaging small live animals. We describe a fast PC-based data acquisition system used to acquire, assess, and store TOHR data. The system can handle high event rates (200 K quadruple-coincidence events/s) from the 15 TOHR photodetectors. High-level system control is provided by a Labview program running on a PC, while a fast, flexible data acquisition protocol is micromanaged by a digital signal processor (DSP) board housed in a PC. Essential hardware components, including detector-mounted charge-to-time converters, a data-routing multiplexer (FPGA based), and fast time-to-digital converters (225-ps resolution), are described in detail. This data acquisition system could be used in physics experiments. 相似文献
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Loureiro C.F.M. Morgado A.M.L.S. Correia C.M.B.A. 《IEEE transactions on nuclear science》1989,36(5):1475-1479
A VME-based multiprocessor system primarily designed as the data acquisition system for a position-sensitive, driftless, gas proportional scintillation counter for X-ray astronomy is described. The counter is built around a nine-photocathode photomultiplier tube. The system was specified so that an external signal triggers the acquisition of nine analog data channels at a 20-MHz rate, with all channels operating in parallel and synchronized. For each data frame a preprocessing algorithm runs in each processor and is followed by a validation routine in the tenth processor. According to the validation decision data may be discarded or collected by the host VME computer. For this purpose a special parallel architecture was developed in which a digital signal processor is dedicated to each data channel, taking care of the acquisition, the preprocessing, and the validation algorithms. Physically the system consists of a set of VME boards each containing two TMS320C26 DSPs and two 20-MHz data acquisition channels 相似文献
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激光诱导原子电离实验中的多定标数据获取系统 总被引:1,自引:0,他引:1
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. 相似文献
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阐述了基于虚拟仪器的采用LabVIEW和通用数据采集卡开发核能谱数据采集系统的全过程.它采取了连续采样和幅度提取的方法,直接对核探头输出的电压脉冲信号进行定性和定量分析.经测试,系统能满足实际测量的要求,并且可以根据需要进行扩展. 相似文献