BS IEC 60462 pdf download – Nuclear instrumentation — Photomultiplier tubes for scintillation counting — Test procedures

BS IEC 60462 pdf download – Nuclear instrumentation — Photomultiplier tubes for scintillation counting — Test procedures
1 Scope and object
This International Standard establishes test procedures for photomultiplier tubes (PMT) forscintillation and Cherenkov detectors.
This standard is applicable to photomultiplier tubes for scintillation and Cherenkov detectors.
Photomultiplier tubes are extensively used in scintillation and Cherenkov counting, both in thedetection and analysis of ionizing radiation and for other applications. For such uses, variouscharacteristics are of particular importance and require additional tests to those conducted tomeasure the general characteristics of PMT. This has made desirable the establishment ofstandard test procedures so that measurements of these specific characteristics may have thesame significance to all manufacturers and users.
The tests described in this standard for PMT to be used in scintillation detectors aresupplementary to those tests described in lEC 60306-4, which covers the basic characteristicscommonly requiring specification for photomultiplier tubes.
This recommendation is not intended to imply that all tests and procedures described hereinare mandatory for every application，but only that those tests carried out on PMT forscintillation and Cherenkov detectors should be performed in accordance with the proceduresgiven in this standard.
2Normative references
The following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60306-4,Measurement of photosensitive devices – Part 4: Methods of measurement forphotomultipliers
3Terms, definitions, symbols and abbreviations3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
photomultiplier tubemultiplier phototubePMT (abbreviation)
vacuum tube consisting of a photocathode and an electron multiplier intended to convert lightinto an electric signal
[IEC 60050-394:2007,394-30-12]
3.1.2
Cherenkov detector
radiation detector designed to detect relativistic particles,using a medium in which theCherenkov effect is produced
NOTE The medium is optically coupled to a photosensitive device,either directly or through light guides.[IEC 60050-394:2007,394-29-17]
3.1.3
scintillation detector
radiation detector consisting of a scintillator that is usually optically coupled to aphotosensitive device, either directly or through light guides
NOTEThe scintillator consists of a scintillating material in which the ionizing particle produces a burst ofluminescence radiation along its path.
[IEC 60050-394:2007,394-27-01]
3.1.4
light guide
optical device designed to transmit light without significant loss
NOTE lt may be placed between a scintillator and a photomultiplier tube.[IEC 60050-394:2007,394-30-15]
3.1.5
dark current (of a photomultiplier tube)
electric current flowing from the anode circuit in the absence of light on the photocathode[IEC 60050-394:2007,394-38-14]
3.1.6
gain (of a photomultiplier tube)
ratio of the anode output current to the current emitted by the photocathode at statedelectrode voltages
[IEC 60050-394:2007,394-38-15]
3.1.7
collection efficiency (of a photomultiplier tube)
ratio of the number of measurable electrons reaching the first dynode to the number ofelectrons emitted by the photocathode
[IEC 60050-394:2007,394-38-16]
3.1.8
light sensitivity (of a photomultiplier)
ratio of a photomultiplier cathode current by the corresponding incident light flux of a givenwavelength
[lEC 60050-394:2007,394-38-62]
3.1.9
spectral sensitivity (of a photomultiplier)light sensitivity as a function of wavelength