e-Black Surfaces

STFC's Accelerator Science department has developed a method of laser ablation to reduce secondary as well as photo-electron yields in particle accelerators and RF waveguides to less than 1.



Secondary electron emission is an unwanted effect limiting the performance of high energy colliders, storage rings and dumping rings such as the Large Hadron Collider. The effect on performance results in a variety of ways including vacuum pressure, beam instability and beam losses. However, the electron cloud (e-cloud) is not limited to just particle accelerators. Electronics and other equipment on space crafts and satellites also experience the e-cloud due to increased presence of charged particles and higher levels of radiation.

STFC’s patented technology utilises surfaces ablated with ultra-short pulsed lasers to create highly organised surface microstructures. Using this technique, the secondary electron yield δmax is reduced to less than 1 with values around 0.76 for blackened metals.




•       Greater ease and reliability in implementation compared to surface coating

•       Process flexibility




•       Scientific facilities and equipment

•       Satellites

•       Medical lasers


Patent Information:
Country Serial No.
United Kingdom 1410593.6
European Patent Office 15729928.0
For Information, Contact:
Liam Brennan
Innovation Manager
STFC Innovations
02.j. Aerospace Technology
03.c. Apparatus Engineering
03.c1 Wave-guides
03.c2 Klystrons
04.c. Energy transmission and conversion
04.e. Nuclear Fission/Nuclear Fusion
05.f1 Accelerators