2010
DOI: 10.1063/1.3501386
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Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr3 scintillator detector and digital data acquisition

Abstract: A new high efficiency, high resolution, fast γ-ray spectrometer was recently installed at the JET tokamak. The spectrometer is based on a LaBr3(Ce) scintillator coupled to a photomultiplier tube. A digital data acquisition system is used to allow spectrometry with event rates in excess of 1 MHz expected in future JET DT plasmas. However, at the lower rates typical of present day experiments, digitization can degrade the energy resolution of the system, depending on the algorithms used for extracting pulse heig… Show more

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Cited by 73 publications
(75 citation statements)
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“…The signal coming from the detector was digitized by means of a 14 bit, 400 Ms/s custom digitizer based on the ATCA platform. 10 The spectrum of the detected radiation was then reconstructed in selected time intervals from charge integration of the digitized waveforms. An important feature of the detector is its capability to distinguish between neutrons and gamma-rays.…”
Section: Experimental Setup and Detector Calibrationmentioning
confidence: 99%
“…The signal coming from the detector was digitized by means of a 14 bit, 400 Ms/s custom digitizer based on the ATCA platform. 10 The spectrum of the detected radiation was then reconstructed in selected time intervals from charge integration of the digitized waveforms. An important feature of the detector is its capability to distinguish between neutrons and gamma-rays.…”
Section: Experimental Setup and Detector Calibrationmentioning
confidence: 99%
“…A new scintillator material, LaBr 3 (Ce) [11][12], meets many of the requirements for γ-ray measurements at ITER. This detector is resilient to neutron damage and first measurements at low counting rates at tokamak devices have been demonstrated [10,13]. High counting rate γ-ray measurements up to a few MHz were also shown at nuclear accelerators without any significant degradation of the energy resolution [9].…”
Section: Introductionmentioning
confidence: 92%
“…A commercially available 1 Gsample/second, 12 bit digitizer was used to record individual pulses from the PMT. The corresponding pulse height spectrum (PHS) was reconstructed off-line using dedicated software [13]. The spectrum measured at FNG is shown in figure 1 and can be compared with that of figure 2.…”
Section: Labr 3 Response Function To 25 Mev Mono-energetic Neutronsmentioning
confidence: 99%
“…It is proposed to use LaBr 3 scintillation detectors equipped with a digital acquisition system. Such choice combines a good energy resolution (R=50-75 keV at 5 MeV) [7] with low sensitivity to neutron background, good detection efficiency and high count rate capability (>MHz) [8]. The 5.02 MeV flux at the detector position along the vertical LOS has been estimated to be about 4⋅10 5 γ⋅s⋅cm -2 , which provides a time resolution for the measurement of T 3He in the range 25-100 ms with statistical uncertainties in the range 5-10%.…”
Section: Gamma Ray Spectroscopy Of 3 He Ionsmentioning
confidence: 99%