Cosmic rays were discovered by Victor Hess at the start of the 20th century in a series of pioneering balloon experiments. Over the last hundred years cosmic ray researchers have climbed mountains, descended into mines, flew hot air balloons and travelled to the four corners of the Earth in order to understand more about these energetic particles from space. This research is ongoing with experiments such as the Pierre Auger Observatory in Argentina and the ANITA balloon experiment in Antarctica.
Energetic primary cosmic ray particles bombarding the upper atmosphere produce a non-stop flow of tiny subatomic particles, called muons, at the Earth's surface. On the order of 10,000 muons per square metre rain down every minute.
Could this flux of particles, provided by nature, be utilised in the areas as diverse as security and archaeology? The UCL CREAM TEA project intends to find out.
Cosmic Ray Extensive Area Mapping for Terrorism Evasion Application
At UCL we have initiated the CREAM TEA project to research the potential of using plastic scintillator based muon detectors to image large volumes (eg. sea containers, cargo vehicles, train stations, etc.). Muons are the most penetrating form of charged particle radiation, they can be absorbed or deflected as the pass through material. By detecting this absorption or scattering it is possible to build up a three dimensional image corresponding to material density, these images can be used to identify anomalous materials such as bombs or fissile material.
With longer exposure times muon tomography imaging techniques could be applied to other fields outside of security such as imaging the contents of nuclear silos or imaging old fragile relics unsuitable for x-ray interrogation.
There are a couple of potential routes into the CREAM TEA project for UCL undergraduate students or potential postgraduate students.
- We offer at least one fourth year undergraduate each year on the project, see the UCL HEP group's undergraduate project page for details of the project and other HEP projects.
- UCL SECReT is a new national centre for PhD training in security and crime science. One of the available PhD research projects within UCL SECReT is a CREAM TEA related project.
For further details please contact Dr Ryan Nichol (rjn AT hep.ucl.ac.uk).
Last Modified : 16:10:52 12 Jan 2010