Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr3 scintillator detector and digital data acquisition

Nocente, M.; Tardocchi, M.; Chugunov, I.N.; Pereira, Rita; Edlington, T.; Fernandes, A.; Gin, D.; Grosso, G.; Kiptily, V.; Murari, A.; Neto, A.; Perelli-Cippo, E.; Pietropaolo, A.; Proverbio, I.; Shevelev, A.; Sousa, J.; Syme, B.; Gorini, G.; Contributors, Jet‐Efda

doi:10.1063/1.3501386

Cited by 71 publications

(75 citation statements)

References 7 publications

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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%

Neutron measurements from beam-target reactions at the ELISE neutral beam test facility

Xie

Nocente

Bonomo

et al. 2014

Review of Scientific Instruments

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Measurements of 2.5 MeV neutron emission from beam-target reactions performed at the ELISE neutral beam test facility are presented in this paper. The measurements are used to study the penetration of a deuterium beam in a copper dump, based on the observation of the time evolution of the neutron counting rate from beam-target reactions with a liquid scintillation detector. A calculation based on a local mixing model of deuterium deposition in the target up to a concentration of 20% at saturation is used to evaluate the expected neutron yield for comparison with data. The results are of relevance to understand neutron emission associated to beam penetration in a solid target, with applications to diagnostic systems for the SPIDER and MITICA Neutral Beam Injection prototypes

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Section: Experimental Setup and Detector Calibrationmentioning

confidence: 99%

Neutron measurements from beam-target reactions at the ELISE neutral beam test facility

Xie

Nocente

Bonomo

et al. 2014

Review of Scientific Instruments

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“…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%

Response of LaBr3(Ce) scintillators to 2.5 MeV fusion neutrons

Cazzaniga¹,

Nocente²,

Tardocchi³

et al. 2013

Review of Scientific Instruments

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Measurements of the response function of LaBr 3 (Ce) to 2.5 MeV neutrons have been carried out at the Frascati Neutron Generator and at tokamak facilities with deuterium plasmas. The observed spectrum has been interpreted by means of a MCNP model. It is found that the main contributor to the measured response is neutron inelastic scattering on 79 Br, 81 Br and 139 La. An extrapolation of the count rate response to 14 MeV neutrons from deuterium-tritium plasmas is also presented. The results are of relevance for the design of γ-ray diagnostics of fusion burning plasmas.carlo.cazzaniga@mib.infn.it 1

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“…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%

Production and diagnosis of energetic particles in FAST

Tardocchi¹,

Bruschi²,

Figini³

et al. 2012

Nucl. Fusion

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Abstract. The Fusion Advanced Study Torus (FAST) has been proposed as a possible European satellite facility to study in deuterium plasmas fast ion physics in conditions relevant to a burning plasma. Energetic 3 He particles, with dimensionless parameters close to those of the fusion-born alphas in ITER, can be produced in FAST via 30 MW power ICRH minority heating. This work provides a first assessment of the extent to which the 3 He fast ion population can be diagnosed in FAST with a set of dedicated confined fast particle diagnostics. Neutron Emission Spectroscopy (NES), Gamma-Ray Spectroscopy (GRS) and Collective Thomson Scattering (CTS) diagnostics have been reviewed with a description of the state-of-the-art hardware and a preliminary analysis of the required lines of sight. The results of the analysis, based on numerical simulations of the spatial and energetic particle distribution function of the ICRH-accelerated ions for the standard FAST H-mode scenario, suggest that NES and GRS measurements can provide an information on the anisotropy of the fast 3 He population and a l measurement of its effective tail temperature, with time resolutions in the range 20-100 ms. The proposed CTS diagnostic can measure the fast ion parallel and perpendicular temperature with a spatial resolution of 5-10 cm and a time resolution of 10 ms. The paper provide a scientific basis for the predictions of FAST capability in the production and diagnosis of energetic ions.

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Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr3 scintillator detector and digital data acquisition

Cited by 71 publications

References 7 publications

Neutron measurements from beam-target reactions at the ELISE neutral beam test facility

Neutron measurements from beam-target reactions at the ELISE neutral beam test facility

Response of LaBr3(Ce) scintillators to 2.5 MeV fusion neutrons

Production and diagnosis of energetic particles in FAST

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