We report on the prototyping of a plastic scintillator hodoscope with wavelengthshifting fibre read-out by a multi-anode photomultiplier as part of the development of a detector for cosmic ray muons to be carried aboard an aircraft. Light yield and light attenuation measurements on singleand double-clad wavelength-shifting fibres were performed. Low power, low-threshold, discriminators were des...

Sodium and potassium may be measured simultaneously, using a modified Eppendorf flame photometer. After automatic sampling and dilution of the plasma, the potassium content is measured, using the existing Eppendorf optical and photomultiplier system. The sodium emission is measured by three silicon photovoltaic cells mounted behind an interference filter for sodium, sited on the atomiser casing...

For the purpose of direct dark matter detection experiments, highly sensitive photodetectors are needed. The UCLA dark matter team is testing and developing a novel hybrid photodector called Silicon Geiger Hybrid Tube (SiGHT) that can potentially replace the currently used photomultiplier tube. The main component of SiGHT is the silicon photomultiplier. The characterization of the SiPM is being...

We are developing a new photon detector with micro pattern gaseous detectors. A semitransparent CsI photocathode is combined with 10cm×10cm GEM/μPIC for the first prototype which is aimed for the large liquid Xe detectors. Using Ar+C2H6 (10%) gas, we achieved the gas gain of 10 which is enough to detect single photoelectron. We, then, irradiated UV photons from a newly developed solid scintilla...