Welcome to the Liverpool ATLAS homepage.
The ATLAS SCT end-cap production at Liverpool is the largest current user of the
Liverpool Semiconductor Detector Centre.
This facility underpins activities in the High Energy and Nuclear Physics
Groups at the University of Liverpool and the Astrophysics Research Institute of the
Liverpool John Moores University. The ATLAS project is concerned with the construction of a very large array of sensors for
charged particle detection and accurate track measurement at the 14 TeV Large Hadron Collider
(LHC) 27km superconducting accelerator which is presently under construction at CERN,
At the LHC, ATLAS will be the largest experiment, measuring 46m long by 22m high and
designed (along with its sister experiment CMS) to identify the new fundamental
particles produced at the unprecedented collision energies. These measurements are
expected to give answers to many leading theoretical questions such as the origin of
mass and the deep connections between all the different forces, matter and space-time.
Cutaway view of the ATLAS Detector.
Within ATLAS, the UK’s largest contribution is to the 60m^2 silicon micro-strip
based Semi-Conductor Tracker (SCT), composed of a 4 layer Barrel section and two 9
layer End-Cap sections. The tracker is composed of 4000 modules, each of 1536 channels
with spatial resolution ~10µm and is being built by an international collaboration of
30 institutes with 11 UK groups contributing.
The ATLAS Semi-Conductor Tracker (SCT).
The End-Cap which is being assembled at
Liverpool with help particularly from colleagues based in the northern Universities and
CLRC, represents roughly half the UK’s deliverables to the tracker. The high spatial
resolution of the silicon detectors will be required to identify and accurately measure
the hundreds of charged particle tracks produced every 25ns by the ultra-high energy
head-on collisions of protons at the LHC. From this information, evidence for the
Higgs and/or Supersymmetric particles, etc, will be extracted from the Pbytes of data
to be recorded by the experiment.