A Faraday cup is a metal (conductive) cup designed to catch charged particles. The resulting current can be measured and used to determine the number of ions or electrons hitting the cup. [1] The Faraday cup was named after Michael Faraday who first theorized ions around 1830.

法拉第杯是一种金属制设计成杯状，用来测量带电粒子入射强度的一种真空侦测器。 测得的电流可以用来判定入射电子或离子的数量。 法拉第杯是用在电学有卓著贡献的麦可·法拉第的姓氏来命名 [1]。 Faraday杯与质谱仪的其他部分保持一定电位差以便捕获离子，当离子经过一个或多个抑制栅极进入杯中时，将产生电流，经转换成电压后进行放大记录。 当离子或电子进入法拉第杯以后，会产生电流或电子流。 对一个连续的带单 电荷 的离子束来说： 其中，N是离子数量、t是时间 ( …

法拉第杯可以在sem、微探针或fib系统上精确测量束流；选择系统上的点模式，将光束聚焦到法拉第杯的100µm小孔中。 孔的空腔几乎吸收了所有的电子或离子。

The PELCO ® Faraday Cup allows for precise measurement of the beam current on SEM, MicroProbe or FIB systems; select point mode on your system and focus the beam into the small 100µm aperture hole of the PELCO ® Faraday Cup. The cavity under the aperture hole absorbs virtually all electrons or ions.

The PELCO ® Faraday Cup is made from brass with overall dimensions of 2.5mm diameter and 2mm height. The aperture size in the top is 100um. The cavity size is approximately 1.5 x 1.5mm. The PELCO ® Faraday Cup is either supplied on a SEM mount or can be mounted on a SEM mount, sample holder or even the SEM stage by the customer.

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The EM-Tec B100 Faraday cup has been designed to enable precise beam current measurements on SEM, FESEM, FIB, EPMA or Microprobe systems. Precise beam current measurement are useful for quantititive X-ray analysis and for consistent and reproducible X-ray mappings and line scans.

A Faraday cup is a useful tool for precise measurements of the electron or ion beam. It consists of an enclosed cavity with a small opening through which the beam can be directed. Sometimes beam measurements are made on graphite (carbon) or an electron beam aperture glued with carbon cement is used.

The EM-Tec B100 Faraday cup has been designed to enable precise beam current measurements on SEM, FESEM, FIB, EPMA or Microprobe systems. Precise beam current measurement are useful for quantitive X-ray analysis and for consistent and reproducible X-ray mappings and line scans.

The PELCO® Faraday Cup is designed for mounting on the specimen stage and uses the existing electrical connections built in the SEM, Microprobe or FIB stage for measuring or displaying absorbed current.