...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Review of Scientific Instruments >Electron multiplier–scintillator detector for pulse counting positive or negative ions
【24h】

Electron multiplier–scintillator detector for pulse counting positive or negative ions

机译：电子倍增探测器检测器，用于对正离子或负离子进行脉冲计数

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A general‐purpose ion detector has been developed for fast pulse counting in mass spectrometry. It consists of a six‐stage electron multiplier joined to part of a scintillator detector. This novel arrangement combines the virtually noiseless pulse‐amplification response of an electron multiplier with the bipolar voltage flexibility of a scintillator detector. The resulting hybrid detector is superior in performance to either an electron multiplier or a conventional scintillator detector. It is designed to detect a beam of positive ions or negative ions focused to a line image or to a spot at the focal plane of a mass analyzer. Background counting noise is less than 1 count/min when the detector is used in either the positive ion or negative ion detecting mode. Mass‐resolved ions are post‐accelerated through an electric field to give them an additional kinetic energy of 10 keV before they strike the ion‐to‐electron converter in the electron multiplier. This allows low‐energy ions to be detected with an efficiency close to unity, over a range of ion masses from 1 amu up to several hundred amu. Randomly spaced pulses can be counted at rates from 0 Hz to 10 MHz. The design of the detector and its operating characteristics are discussed.
机译：已开发出一种通用离子检测器，用于质谱中的快速脉冲计数。它由一个六级电子倍增器组成，该倍增器与闪烁体检测器的一部分相连。这种新颖的装置将电子倍增器的几乎无噪声的脉冲放大响应与闪烁体检测器的双极电压灵活性相结合。最终的混合探测器的性能优于电子倍增器或常规闪烁器探测器。它设计用于检测正离子束或负离子束，聚焦到线图像或质量分析器焦平面上的点。当在正离子或负离子检测模式下使用检测器时，背景计数噪声小于1个计数/分钟。质量分解的离子在经过电子倍增器中的离子-电子转换器之前，会通过电场进行后加速，以使其具有10 keV的额外动能。这样可以在1 amu至数百amu的离子质量范围内以接近统一的效率检测低能离子。可以以0 Hz到10 MHz的速率对随机间隔的脉冲进行计数。讨论了探测器的设计及其工作特性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号