Hybrid photon detectors

New Developments in Hybrid Photon Detectors

New developments in HPD design are presented, triggered by applications in high energy physics and astrophysics. The presented HPD designs are based on three innovations. (i) In order to achieve the highest possible surface coverage in a RICH detector, we introduced a photoelectron focussing method which is efficient to the periphery of the photocathode. (ii) To prevent positive ion feedback in...

Pixel hybrid photon detectors for the LHCb-RICH system

The baseline option for the photon detectors of the LHCb Ring Imaging Cherenkov (RICH) subsystem is the pixel hybrid photon detector (HPD) [1]. Commercially available pixel HPDs do not fully meet the LHCb RICH requirements, namely wide area coverage over 2.6 m, single photon sensitivity in the wavelength range of 200600 nm, channel size of 2.5 x 2.5 mm and a speed compatible with the LHC bunchc...

Novel Cherenkov photon detectors

Gaseous detectors using multiple gas electron multiplier (GEM) electrodes permit to attain large amplification factors with a strong suppression of photon and ion-mediated feedback. With the first GEM in a cascade coated with a photosensitive layer, they provide efficient and fast single photon detection, with excellent position resolution. General performances of CsI-coated multi-GEM detectors...

Semiconductor Photon Detectors

Semiconductor optical single-photon detectors

Avalanche Photodiodes (APDs) connected with quenching circuits can be used for single photon detection. This semiconductor photon detector has a better performance than photomultiplier. The principles and applications of APDs are presented. Features, performance of different commercial devices are introduced and compared. Recent research progress based on the improvement of quenching circuits a...