A fast timing light pulser for scintillation detectors

Kapustinsky, J.; DeVries, R.M.; DiGiacomo, N.J.; Sondheim, W. E.; Sunier, J. W.; Coombes, H.

doi:10.1016/0168-9002(85)90622-9

Cited by 84 publications

(46 citation statements)

References 4 publications

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“…The LED flasher follows the design reported in [20], which originates from the one by J.S. Kapustinsky in 1985 [21]. For the POCAM in STRAW, the parameters of the components have been adjusted in order to achieve a pulse FWHM of < 10 ns and maximum light intensity.…”

Section: Flasher Circuitmentioning

confidence: 99%

STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean

et al. 2019

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The instrumentation for a pathfinder mission towards a possible large scale neutrino telescope named "STRings for Absorption length in Water" (STRAW) is presented in terms of design and performance. In June 2018 STRAW was deployed at the Cascadia Basin site operated by Ocean Networks Canada and has been collecting data since then. At a depth of about 2600 meters, the two STRAW 120 meters tall mooring lines are instrumented by three "Precision Optical Calibration Modules" (POCAM) and five Digital Optical Sensors (sDOM). The main objectives of STRAW are the measurement of light extinction in different wavelength bands and bioluminescence at Cascadia Basin. We describe the instrumentation deployed in the Pacific Ocean and show some data from the first measurements.

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Section: Flasher Circuitmentioning

confidence: 99%

STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean

et al. 2019

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“…The 1mm 2 SiPM device was positioned near the centre of the inner chamber hanging from an optical fibre cable as shown in figure 2. A pulsing circuit based on that of Kapustinsky [20] was connected to an externally mounted light emitting diode (LED) producing 5ns rise-time 15ns decay-time light pulses of variable intensity, which were passed through the fibre optic cable to the SiPM device. The output of the optical fibre was positioned less than 1mm from the SiPM device so that the total area was illuminated.…”

Section: Methodsmentioning

confidence: 99%

Characterisation of a silicon photomultiplier device for applications in liquid argon based neutrino physics and dark matter searches

et al. 2008

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The performance of a silicon photomultiplier has been assessed at low temperature in order to evaluate its suitability as a scintillation readout device in liquid argon particle physics detectors. The gain, measured as 2.1×10 6 for a constant over-voltage of 4V was measured between 25°C and -196°C and found to be invariant with temperature, the corresponding single photoelectron dark count rate reducing from 1MHz to 40Hz respectively. Following multiple thermal cycles no deterioration in the device performance was observed.The photon detection efficiency (PDE) was assessed as a function of photon wavelength and temperature. For an over-voltage of 4V, the PDE, found again to be invariant with temperature, was measured as 25% for 460nm photons and 11% for 680nm photons.Device saturation due to high photon flux rate, observed both at room temperature and -196°C, was again found to be independent of temperature. Although the output signal remained proportional to the input signal so long as the saturation limit was not exceeded, the photoelectron pulse resolution and decay time increased slightly at -196°C.

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“…The Nanobeacon electronics consists of two components, the Pulser and the Control Electronics (see figure 2): The Pulser circuit is based on an original design from Kapustinsky [4] that has been modified for KM3NeT (see figure 2). The trigger is provided by a 1.5 V negative square pulse of around 150 ns superimposed on a negative DC bias that can be varied from 0 to 24 V. The DC component charges the capacitor and the rising edge of the differentiated 1.5 V pulse switches on the pair of transistors, triggering the fast discharge of the 100 pF capacitor through the low impedance path that includes the LED.…”

Section: Electronicsmentioning

confidence: 99%

Nanobeacon: A low cost time calibration instrument for the KM3NeT neutrino telescope

Calvo¹

2014

AIP Conference Proceedings

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The KM3NeT collaboration aims at the construction of a multi-km3 high-energy neutrino telescope in the Mediterranean Sea consisting of a matrix of pressure resistant glass spheres holding each one a set (31) of small area photomultipliers. The main goal of the telescope is to observe cosmic neutrinos through the Cherenkov light induced in sea water by charged particles produced in neutrino interactions with the surrounding medium. A relative time calibration between photomultipliers of the order of 1 ns is required to achieve an optimal performance. Due to the high volume to be covered by KM3NeT, a cost reduction of the different systems is a priority. To this end a very low price calibration device, the so called Nanobeacon, has been designed and developed. At present one of such devices has already been integrated successfully at the KM3NeT telescope and eight of them in the Nemo Tower Phase II. In this article the main properties and operation of this device are described.

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A fast timing light pulser for scintillation detectors

Cited by 84 publications

References 4 publications

STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean

STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean

Characterisation of a silicon photomultiplier device for applications in liquid argon based neutrino physics and dark matter searches

Nanobeacon: A low cost time calibration instrument for the KM3NeT neutrino telescope

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