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手持式光谱仪专业术语

日期:2019-10-8(原创文章,禁止转载)

  手持式光谱仪专业术语

  多道分析器MCA Multi-Channel Analyzer

  数字多道分析器DMCA Digtal Multi-Channel Analyzer

  单道分析器SCA Single-Channel Analyzer

  输入计数率Input Count Rate (ICR) The measured input count rate (ICR) is displayed in units of thousands ofcounts per second [kcps]. The FPGA applies internal correction procedures sothat the measured ICR is very close to the true ICR, especially for longerpeaking time settings.

  测量的输入计数率(ICR)以千计/秒[kcps]为单位显示。 FPGA应用内部校正程序,使得测量的ICR非常接近真实的ICR,特别是对于较长的峰化时间设置。

  输出计数率Output Count Rate (OCR) The output countrate is also displayed in units of thousands of counts per second [kcps]. TheOCR is simply the武汉中医如何治癫痫 total number of detected events that did not pile up dividedby the real time elapsed. Detected events that do not pile up, but whosemeasured energy falls outside the spectrum upper and lower limits, are calledoverflows and underflows, respectivel安阳正规癫痫病医院y. Both overflows and underflows areincluded in the OCR.

  输出计数率也以千计/秒[kcps]为单位显示。 OCR仅仅是未被堆积的检测到的事件的总数除以所经过的实际时间。不累积,但其测量的能量落在频谱上限和下限之外的检测事件分别称为溢出和下溢。溢出和下溢都包括在OCR中。

  注:Throughput (OCR)

  The OCR depends only on the ICR and the deadtime per event

  To increase the OCR at a given ICR, the deadtime per event must be reduced. The obvious first step is to reduce the energypeaking time tp. Further improvements can be made by reducing the gap time tg.

  为了在给定的ICR下增加OCR,必须减少每个事件的死区时间。明显的第一步是减少能量峰值时间tp。可以通过减小间隙时间tg进行进一步的改进。

  死时间Dead Time TheDead Time Percentage (%) is calculated as the OCR divided by the ICR multipliedby the real time.

  死区时间百分比(%)计算为OCR除以ICR乘以实际时间。

  实时时间Real Time

  活时间Live Time

  分辨率FWHM

  Peaking Time(Energy Filter)

  Thepeaking time is the energy filter l武汉有治疗癫痫医院ength, or integration time, i.e. the rampinginterval of the trapezoid. It is the primary setting in determining the balancebetween count rate performance and energy resolution.

  峰值时间是能量滤波器长度或积分时间,即梯形的斜坡间隔。它是确定计数率性能和能量分辨率之间的平衡的主要设置。

  Theoutput response of the Energy Filter with peaking time (ramping time) = 20.16μsand gap time (flattop time) = 0.96μs. The trapezoid is the response to anx-ray.

  能量滤波器的输出响应峰值时间(斜坡时间)=20.16μs,间隙时间(平顶时间)=0.96μs。梯形是对x射线的响应。

  Gap Time (Top Time)(EnergyFilter)

  Thegap time of the energy filter sets the flattop length of the output trapezoid.Because the gap time directly affects the dead time, it is advantageous to setthe gap time as short as possible.

  Reducingthe gap time can significantly increase the data throughput at a given peakingtime.

  SDD  Silicon Dri武汉哪里看癫痫病最好?ft Detector

  SI-PIN Siliconpositive-intrinsic-negative photodiode P型-本征型-N型硅光电二极管

  X-RAY Tube X射线光管

  EDX EnergyDispersive X-Ray Spectroscopy能量色散X射线光谱仪

  XRF X手持式光谱仪(X Ray Fluorescence)

  DPP 数字脉冲处理器 Digital Pulse Processor

  CPS 计数率 Count per Second

  FP算法基本参数法 Sherman法

  经验系数法 EC法

  定性分析

  定量分析

  半定量分析

  脉冲高度分析器

  逃逸峰

  基体效应

  元素间吸收-增强效应

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