[en] After a review of the temporal properties of photomultipliers used in single photoelectron experiments, the main problems encountered in the applications to measurement of the shape of fast light pulses and to the determination of the statistical characteristics of light beams are examined

[en] The purpose of this invention is to provide a dynode for a type of photomultiplier that makes it possible to reduce the variations in the multiplication factor which previously could be attributed to the mechanical dip of the surfaces of the dynodes. The other aim concerns the design of a photomultiplier tube comprising at least two dynodes in succession and in which the tendency of the electrons emitted by the first dynode not to hit the second has been reduced. This type of dynode that can be manufactured at low cost can be used in standard photomultiplier tubes without their having to undergo significant modifications

[en] Full text of publication follows: Double Chooz detectors have each 390 inner photomultiplier tubes (PMT) with 10 inch diameter. With Hamamatsu, we have succeeded to produce very low background glass. PMTs were tested in Japan and sent to MPIK (Germany) for new testing, cleaning and assembling the structure. After delivery to Chooz, we installed side and bottom PMTs in far detector. All PMTs will be installed by November. This poster shows the long way of PMTs until detector. (author)

[en] Detectors for high-energy physics make use of photomultipliers in a variety of ways. They include high resolution time-of-flight measurements, Cerenkov light detection, precise pulse-height measurements, etc. In particular, the use of large numbers of photomultipliers in total-energy (or ''calorimetry'') detectors requires high stability, reliability and low-cost. This aspect is illustrated by the example of a new large detector built to observe proton-antiproton collisions at very high energies

[en] Apparatus for measuring radioactive emission from a sample includes: a housing; parallel elongate scintillation crystal radiation detectors; elongate photomultipliers each arranged adjacent and attached to a detector and disposed such that the detector lies between the photomultiplier and the passage for the sample; light transmitting means joining the multipliers to their detectors; and means for connecting electronic measuring means to the photomultipliers. The light transmitting means may comprise optical prisms associated with each photomultiplier and detector. The prism may be octagonal in shape in a direction transverse to the elongate axes of the detector and multiplier. In separate claims: the housing is a lead tunnel; the inside of the housing is lined with lead which has a lower level of radioactive emission than the lead of the tunnel; the wall on the inside of the housing is lined with a metal having a lower atomic number than lead; and the detectors, their multipliers and prisms are held in position within two U-shaped sleeves which surround the passage through the opening

[en] Photomultiplier with lateral outlets, said outlets being arranged along one and the same generatrix of the tube-envelope. In view of the very small diameter of that photo-multiplier and because of its lateral outlets, it is possible to combine a large number of such photo-multipliers for forming a scintiscanning matrix, the required connections being made in the space left between four photomultipliers. The thus defined matrix provides a satisfactory resolution of the detected image

[en] The time resolution capabilities of prototype microchannel plate and static crossed-field photomultipliers have been investigated. Measurements were made of electron transit time, rise time, time response, single phtoelectron time spread and multiphotoelectron time spread for LEP HR350 proximity focused high gain curved microchannel plate and VPM-154A/1.6L static crossed-field photomultipliers. The experimental data have been compared with results obtained with conventionally designed high speed photomultipliers. Descriptions are given of both the measuring techniques and the measuring systems. 16 refs

[en] The photomultipliers comprise multi-alkali or bi-alkali photocathodes (types Sb-K-Cs and Sb-Na-K) and box and venetian-blind multiplier systems. THe dynodes consist of either a AgMg alloy or an antimony-cesium emitter on a nickel backing. The system is described of photomultiplier designations set by Czechoslovak standards. The specifications are shown in table of Czechoslovak photomultipliers. (H.S.)

No abstract available

No abstract available