Categories of exhibits
Feedthrough for PMT detector
Exhibit no. 651
The operation of a vacuum instrument, such as a mass spectrometer often requires the transmission of electrical currents, voltages or signals across the walls of vacuum chambers.This is possible with electrical feedthroughs.
They often consist of ceramic-to-metal assemblies, where the ceramic serves as an electrical insulator between the conductor and the connection flange. In addition to providing leak-tightness in high and ultra-high vacuum, some feedthroughs are resistant to high temperatures used during bake-out cleaning.
This exhibit is a 64mm CF flange that held a photomultiplier detector in the ZAB-EQ sector mass spectrometer manufactured by VG Analytical LTD. in 1986. It also served as a feedthrough for connecting wires to the detector (pin connector for the first dynode, BNC connector for the collector) and wires for resistance heating.
