Conveners
Session 1: Detector Development
- Chris Allwork
The detection of neutrons with a variety of energies has impact that spans the realms of fundamental and applied physics. At the University of Surrey, we undertake research into both novel detector materials and the application of more established materials for neutron detection, with a focus on scintillator detectors.
A summary of recent work performed by the group will be presented, with...
This presentation will give an overview of current work at the STFC Detector Development Group to produce a new generation of X-ray imaging detectors for hard X-rays (5 - 600keV) utilising modern compound semiconductor sensor materials such as HF-CdZnTe for photon science applications.
These developments include HEXITEC-MHz, a new generation of our High Energy X-ray Imaging Technology that...
Current existing semiconductor radiation detection technologies, such as Cadmium Telluride (CdTe), Cadmium Zinc Telluride (CZT), High-purity Germanium (HpGe) and Silicon (Si), suffer from several limitations. These include high production costs, the need for cryogenic cooling (for HpGe), and insufficient stopping power in materials composed of low-atomic-number elements (such as Si). These...
Noble gases are chemically unreactive and therefore the easiest fission fragments to extract from fissioned samples. Krypton and xenon isotopes are relatively highly produced making them good candidates for measurement. Sitting in different mass peaks, their ratio can also be used to differentiate between fission sources. Using a beta-gamma system to measure the extracted gases improve...
In recent years a great deal of research has been devoted to the development of so-called spectroscopic plastic scintillator. The addition of high-Z materials increases the stopping power and photopeak efficiency of plastic scintillator albeit generally with a reduction in light yield. Common elements used for this development include tin (Z=50) and lead (Z=82), and such metal-loaded plastics...
Lens-based imaging detectors such as those typically used for MeV X-ray imaging and synchrotron-based imaging suffer greatly from poor collection efficiency, typically recording only ~1% of light emitted by the scintillator. However, spatially periodic, sub-wavelength photonic structures provide a means to modify the emission, transport and outcoupling of photons in a crystal. Nanoscale...