An instrument for the measurement of troposphric OH radical concentrations using a laser-induced fluorescence technique has been developed. Ambient air is expanded through a pinhole into a low-pressure fluorescence cell and irradiated by the second harmonic of a dye laser at a high repetition rate of 1 kHz. The OH radicals are electronically excited using A 2 Σ + ( ν ′ = 0) ← X 2 Π ( ν ′′ = 0) ...

1 Abstract This report presents some recent data on tests on photomultiplier tubes (PMT's) carried out at the University of Oxford. The standardized testing procedures have been extensively documented in another report [1] which describe the 'Mortar' apparatus and the conditions used.

A facility to test the photomultiplier tubes (PMTs) for the solar neutrino detector Borexino was built at the Gran Sasso laboratory. Using the facility 2200 PMTs with optimal characteristics were selected from the 2350 delivered from the manufacturer. The details of the hardware used are presented. r 2004 Published by Elsevier B.V.

Magnetic iron oxide nanoparticle clusters (mnpc) coated with organic stabilizers were investigated using scanning transmission x-ray microscopy (STXM). Simultaneous surface and bulk sensitive Fe L3 edge absorption spectra, obtained using a photomultiplier tube and a channeltron, were used to detect subtle changes in the oxidation state in the surface and bulk of Iron Oxide mnpc. The effectivene...

–PARISROC is a complete read out chip, in AMS SiGe 0.35 m technology, for photomultipliers array. It allows triggerless acquisition for next generation neutrino experiments and it belongs to an R&D program funded by the French national agency for research (ANR) called PMm 2 : " Innovative electronics for photodetectors array used in High Energy Physics and Astroparticles " (ref.ANR-06-BLAN-018...

The 17 m diameter MAGIC telescope aims for gamma-ray astronomy above 15 GeV. The technical concept and status of the detector component developments for the first phase with a classical photomultiplier camera (threshold 30 GeV) will be given. The physics program will be reviewed in a separate contribution.

The ANTARES collaboration is building a deep sea neutrino telescope in the Mediterranean Sea. This detector will cover a sensitive area of typically 0.1 km and will be equipped with about 1000 optical modules. Each of these optical modules consists of a large area photomultiplier and its associated electronics housed in a pressure resistant glass sphere. The design of the ANTARES optical module...