In scanning electron microscopy, a thermionic electron source such as a tungsten filament is usually used. The subject of this tutorial, the Hitachi S-4700 FE-SEM, utilizes a cold cathode field ...

Ubiquitous in the field of electric propulsion, thermionic hollow cathodes are electron sources which utilize thermionic emission from a low work function insert material to achieve large extracted ...

It is equipped with a secondary electron detector, backscatter electron detector, low vacuum secondary detector and silicon drift x-ray detector. The thermionic electron gun can be set from 1-20kV.

Since the mid-20th century, the Conventional Thermionic Electron Gun (TEG) has provided the basis for a variety of specialized applications in surface treatments (hardening, annealing, tempering ...

THE thermionic valve has long been recognized ... Voltage is measured by its controlling action on the electron current in the valve, while current may be determined by measuring the voltage ...

FEI Tecnai 20 The Wolfson Bioimaging Facility houses an FEI Tecnai T20 equipped with a 200 kV LaB6 thermionic electron source and Eagle 2k CCD detector. It enables ambient temperature and ...

The Thermo Fisher Apreo 2 Variable Pressure Field Emission Scanning Electron Microscope (FE-SEM) is a thermionic field emission high resolution scanning electron microscope. The Apreo 2 FE-SEM is an ...

However, [Nick Poole] wanted to investigate an alternative method, using thermionic converters for solar power generation. [Nick] has been gearing up to produce various styles of vacuum tubes ...

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