Higher emission density electron emitter for use in medical X-ray equipment

Request Number N784801
Need details

Siemens Healthcare GmbH is seeking an Electron Emission Technology for cathodes in x-ray tubes, allowing us to extract more than 4.5 A/cm² for at least a 5s time period.



Electron Emission Technology for cathodes in x-ray tubes is a core enabler for high image quality in diagnostic x-ray imaging. With conventional technology, (i.e. tungsten filaments or flat emitters) and upcoming new technologies (i.e. Cabo-Nano Tube/ field emission), the design of cathodes is limited by the emission current density of approximately 3 A/cm².


The advancements in medical imaging equipment are constantly asking for an increase in power – both for very short and longer periods of time. Therefore we are seeking methods or technologies which would allow us to extract substantially more than 3 A/cm² for at least a 5s time period.


Key Success Criteria
  • Substantially more than 3 A/cm² electron emission density (~ + 50% )
  • At reasonable lifetime  (>100.000 sec.) of the emitting material;
  • The effective area (100% contributing to emission) should be larger than 0.5 cm²
  • Electron emission preferably directed  


Possible Approaches

Thermal emission of tungsten, dispenser cathodes like LaB6


Approaches not of interest
Siemens is interested in all possible solutions that can meet the requirements.
Preferred Collaboration types
  • Joint Development
  • Contract Research
  • Technology Licensing
  • Technology Acquisition
  • Supply Agreement
  • To Be Negotiated
Items to be submitted

We are looking for concise, non-confidential proposals. The proposal should:

  • Describe the technical approach
  • Include a description of the responding organization or team and their experience.

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Point of Contact
Stephen Clulow
Area of Interest
  • Aerospace & Defense
  • Electronics & Electronic Components
  • Electrical Products
  • Electronic Component Manufacturing
  • Manufacturing & Fabrication
  • Medical Products & Services
Due Date
March 15, 2018
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