CHELSI: Recent developments in the design and performance of a high-energy neutron spectrometer

Mclean, Thomas Donaldson; Olsher, R. H.; Devine, R. T.; Romero, Leonard L.; Fallu-Labruyere, A.; Grudberg, P.; Tan, Hui; Chu, Y.X.

doi:10.1016/j.nima.2006.02.057

Cited by 4 publications

(17 citation statements)

References 8 publications

(9 reference statements)

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“…The prototype probe was also evaluated on the 90m flight path at the WNR/LANSCE facility (11) using the measurement methods described earlier (2) . In-line beam filters were again employed to harden the beam and reduce the incident gamma and neutron fluence rate.…”

Section: Methodsmentioning

confidence: 99%

“…The CsI probe assembly can be readily removed from the housing and used in conjunction with Polaris, a bench top digital spectrometer as described previously (1)(2) .…”

Section: Probe Descriptionmentioning

confidence: 99%

“…When a charged particle event is detected and validated, the DSP determines the particle identification index (2) (PID), which describes the shape of the pulse, and calculates the net pulse energy before writing both values to memory. The memory is divided in two 8 kbyte buffers, which are addressed alternately; one buffer is filled, while the host reads the other buffer.…”

Section: Firmwarementioning

confidence: 99%

“…The optimum grid structure has yet to be determined but the example shown in Figure 2 includes 28 separate zones. Time-of-flight data previously collected (2) for a 1"x1" CsI scintillator provided a convenient set of empirical response functions with which to evaluate the feasibility of applying the UMG unfolding codes.…”

Section: Deconvolutionmentioning

confidence: 99%

“…In previous publications (1)(2) , we have detailed the evolution of a novel neutron spectrometer for use in high-energy neutron fields. It is designed to be lightweight and portable while providing real time dose data to the operator.…”

Section: Introductionmentioning

confidence: 99%

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CHELSI: a portable neutron spectrometer for the 20-800 MeV region

Mclean

Olsher

Romero

et al. 2007

Radiation Protection Dosimetry

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CHELSI is a CsI-based portable spectrometer being developed at Los Alamos National Laboratory for use in highenergy neutron fields. Based on the inherent pulse shape discrimination properties of CsI(Tl), the instrument flags charged particle events produced via neutron-induced spallation events. Scintillation events are processed in real time using digital signal processing and a conservative estimate of neutron dose rate is made based on the charged particle energy distribution. A more accurate dose estimate can be made by unfolding the 2D charged particle versus pulse height distribution to reveal the incident neutron spectrum from which dose is readily obtained. A prototype probe has been assembled and data collected in quasi-monoenergetic fields at the The Svedberg Laboratory (TSL) in Uppsala as well as at the Los Alamos Neutron Science Center (LANSCE). Preliminary efforts at deconvoluting the shape/energy data using empirical response functions derived from time-of-flight measurements are described.

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Section: Methodsmentioning

confidence: 99%

“…The CsI probe assembly can be readily removed from the housing and used in conjunction with Polaris, a bench top digital spectrometer as described previously (1)(2) .…”

Section: Probe Descriptionmentioning

confidence: 99%

Section: Firmwarementioning

confidence: 99%

Section: Deconvolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CHELSI: a portable neutron spectrometer for the 20-800 MeV region

Mclean

Olsher

Romero

et al. 2007

Radiation Protection Dosimetry

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CsI(Tl) pulse shape discrimination with the Belle II electromagnetic calorimeter as a novel method to improve particle identification at electron–positron colliders

Longo

Roney

Cunliffe

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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This paper describes the implementation and performance of CsI(Tl) pulse shape discrimination for the Belle II electromagnetic calorimeter, representing the first application of CsI(Tl) pulse shape discrimination for particle identification at an electron-position collider. The pulse shape characterization algorithms applied by the Belle II calorimeter are described. Control samples of γ, µ + , π ± , K ± and p/p are used to demonstrate the significant

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Hadronic vs. electromagnetic pulse shape discrimination in CsI(Tl) for high energy physics experiments

Longo

Roney

2018

J. Inst.

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A: Pulse shape discrimination using CsI(Tl) scintillators to perform neutral hadron particle identification is explored with emphasis towards application at high energy electronpositron collider experiments. Through the analysis of the pulse shape differences between scintillation pulses from photon and hadronic energy deposits using neutron and proton data collected at TRIUMF, it is shown that the pulse shape variations observed for hadrons can be modelled using a third scintillation component for CsI(Tl), in addition to the standard fast and slow components. Techniques for computing the hadronic pulse amplitudes and shape variations are developed and it is shown that the intensity of the additional scintillation component can be computed from the ionization energy loss of the interacting particles. These pulse modelling and simulation methods are integrated with GEANT4 simulation libraries and the predicted pulse shape for CsI(Tl) crystals in a 5 × 5 array of 5×5×30 cm 3 crystals is studied for hadronic showers from 0.5 and 1 GeV/c K 0 L and neutron particles. Using a crystal level and cluster level approach for photon vs hadron cluster separation we demonstrate proof-of-concept for neutral hadron detection using CsI(Tl) pulse shape discrimination in high energy electron-positron collider experiments.

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CHELSI: Recent developments in the design and performance of a high-energy neutron spectrometer

Cited by 4 publications

References 8 publications

CHELSI: a portable neutron spectrometer for the 20-800 MeV region

CHELSI: a portable neutron spectrometer for the 20-800 MeV region

CsI(Tl) pulse shape discrimination with the Belle II electromagnetic calorimeter as a novel method to improve particle identification at electron–positron colliders

Hadronic vs. electromagnetic pulse shape discrimination in CsI(Tl) for high energy physics experiments

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