Patent ID: 9188552
Filing Date: 2015-11-17
Classification: G01N,G01T,H01J

Abstract:
1. An X-ray spectrometer comprising: an X-ray detector for detecting X-rays and outputting a staircase waveform having steps whose heights correspond to energy levels of the X-rays; a first differential filter having a time constant and operative to convert the staircase waveform into a first pulsed signal having peaks whose heights correspond to the heights of the steps; an event detection portion for making a decision as to whether the first pulsed signal has exceeded a threshold value; a noise event detection portion for making a decision as to whether a period during which the first pulsed signal is in excess of the threshold value is shorter than a given time; a second differential filter having a time constant longer than the time constant of the first differential filter and operative to convert the staircase waveform into a second pulsed signal having peaks whose heights correspond to the heights of the steps; a maximum value detection portion which, if the first pulsed signal is judged to be in excess of the threshold value, starts to detect a maximum value of the second pulsed signal; and a decision portion for making a decision as to whether information about the maximum value is output, based on the decision made by the noise event detection portion.