TECH FRONT
Lasers to Help Take Large Hadron Collider to the Next Level
N
ew pioneering laser technology could soon boost the performance of the Large Had-
ron Collider (LHC) at CERN (Geneva, Switzerland) to new levels of effi ciency, helping unlock some of science’s great- est mysteries going back to the Big Bang, researchers say.
The technology for the surface
modifi cation of metals known as LESS (Laser Engineered Surface Structures) for this specifi c application is the result of a collaboration between the Univer- sity of Dundee (Dundee, Scotland) and the Science and Technology Facilities Council (STFC; Swindon, UK). Dundee and STFC have now entered into part- nership with CERN to employ the new technology, which is aimed at clearing the electron cloud that develops in the LHC and limits the range of experi- ments that it can handle.
“Large particle accelerators such as the Large Hadron Collider suffer from a fundamental limitation known as the electron cloud,” said Professor Amin Abdolvand, chair of Functional Materials & Photonics, University of Dundee. “This cloud of negative particles under certain conditions may degrade the perfor- mance of the primary proton beams that circulate in the accelerator, which is central to its core experiments. “Current efforts to limit these ef- fects involve applying composite met- al or amorphous carbon coatings to the inner surfaces of the LHC vacuum chambers,” Abdolvand said. “These are expensive and time-consuming processes that are implemented under vacuum.”
In the frame of the High Luminos- ity LHC project, CERN is preparing to upgrade the collider from 2019
and a new solution is needed to reduce the electron cloud problem to much lower levels than are expected as the upgraded collider will use proton beams of double the intensity of the current ones.
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