For X-ray technology

We using emission cathodes based on oriented carbon nanotubes. In use oriented carbon nanotubes in X-ray Tubes we can get localization of radiation. Emission threshold field for our material based on CNTs is 1-3 V / m, the emission current remains stable at current densities up to 1 A/cm ^2.

Carbon nanotubes (CNTs) are ideal electron field emitters due to their high aspect ratio, superior electrical and thermal conductivity, and relatively high chemical and mechanical stability.

Needs:

  • Flat light sources of large area, high brightness and high conversion efficiency of electrical energy into light
  • Compact X-ray tubes

Implementation:

Using the effect of cathode field emission of carbon nanotubes is one of the promising directions for these technologies.

Investigations:

The mechanism of field emission, VAC peculiarity, relationship with the CNTstructure, field cathode structure, the use of systems with CNT to create electronic devices.

Applications:

  • X-ray sources (scientific equipment, medicine, lithography, security systems)
  • Air ionizers (sanitation, recycling, industry-ESD protection, electron microscopy)
  • Sources of beta radiation (industry- width meter, monitoring integrity, diology - impact on biological objects)
  • Flat screens (electronics, wearable gadget)

Material

The threshold field (V / m)

Mo

50–100

Si

50–100

The semiconductive p-type diamond

130

Undoped defective CVD diamond

30–120

Amorphous diamond

20–40

Cs coated diamond

20–30

Graphite powder (<1 mm in size)

17

Nanostructured diamond

3-5 (unstable> 30 mA/cm2)

CNT

1-3 (stable at 1A/cm2)


Customer consumer benefits:
● New generation of x-ray sources;
● Minimization of radiation area for end users;
● Stable technical parameters;
● Savings in energy consumption;
● Lifetime prolongation of X-ray tube in 2 times.

Benefits of using emission cathodes:
● Low voltage threshold issue;
● A high current density emission (intensity);
● High efficiency;
● Reduced energy consumption;
● The minimum size (mobility);
● Reliability;
● Easy manufacturing field emission cathodes;
● The availability and low cost of production equipment;
● Environmental and safety.
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