Custom Assemblies

We design and manufacture custom assemblies that optimize the performance of our cathodes in the high-temperature, high-voltage, and ultra-high vacuum environments in which they operate.

The APT Advantage in Custom Assemblies

  • Decades of engineering expertise and deep understanding of the physics of electron emission and charged particle optics.

  • We work closely with our customers to first understand their requirements, then develop innovative, optimized, and practical solutions.

Contact us for standard or custom inquiries

Featured Product: Carbon Embedded Cathode


  • Crystals embedded in carbon are protected from source environment ions, which can shorten cathode lifetime

  • Can be used in X-ray and ion source environments where bombardment is a factor

  • Graceful aging of crystals within the embedded carbon allows for continuous alignment as the crystal is in use

* Not recommended for CeBix® crystals

Featured Product: Monolithic Graphite


  • An alternative for thermionic emitters, monolithic graphite provides even heating in a single graphite heater

  • Crystal mounts are customizable for various crystal ships and sizes

* Not recommended for CeBix® crystals

FREE THE ELECTRON