Conveners
Advanced photon detectors X-rays and Gamma ray
- Richard Plackett (University of Oxford (GB))
Compton imaging is an important gamma-ray imaging method with wide-band energy measurement and large field-of-view in medical, astrophysics and environmental applications. One of the drawbacks of Compton imaging is its low signal to noise ratio (SNR) and electron tracking of Compton recoil electrons may help to improve SNR to limit the Compton cones to Compton arc. We have designed and...
Compton imaging can visualize a radioactive source visualization without any mechanical collimators based on the Compton scattering kinematics. The conventional imaging method confines the source location only on a conical surface with a calculated scattered angle from the energy depositions and interaction positions in a scatterer and an absorber. However, Compton cones causes an artifact in...
In this contribution, we present a proof-of-concept, fine-granularity particle detector constructed from plastic scintillating fibres (SFs) readout with a Single-Photon Avalanche Diode (SPAD) array sensor, intended for the next generation of neutrino experiments. These experiments will be limited by systematic uncertainties, of which many can be constrained by having a precise knowledge of the...
The HEXITEC$_{MHz}$ detector system is the latest generation of the STFC’s HEXITEC spectroscopic X-ray imaging detector systems. When coupled to Cd(Zn)Te sensor material, the original HEXITEC system delivers high-resolution X-ray spectroscopy (50 electrons RMS) per 250 μm pitch pixel for hard X-rays with energies 2 - 200 keV. However, a 9.1 kHz frame rate and the need to identify...
Low Gain Avalanche Diodes (LGADs) are silicon sensors with an internal gain in the order of 10 obtained via the impact ionization process.
The initial technological implementation of the sensors constrains their minimum channel size to be larger than 1 mm$^2$ in order to reduce inefficiencies due to the segmentation of the gain structure. In photon science, the gain provided by LGAD sensors...
