Forward modeling of pile-up events in liquid scintillator detectors for neutron emission spectroscopy [Elektronisk resurs]
-
Sahlberg, Arne (författare)
-
Eriksson, Jacob, 1985- (författare)
-
Conroy, Sean (författare)
-
Ericsson, Göran (författare)
-
Hägg, Linus (författare)
-
Giacomelli, Luca (författare)
-
Belli, Francesco (författare)
-
Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
- Publicerad: AIP Publishing, 2021
- Engelska.
-
Ingår i: Review of Scientific Instruments. - 0034-6748. ; 92:8
-
Läs hela texten
-
Läs hela texten
-
Läs hela texten
Sammanfattning
Ämnesord
Stäng
- When using liquid scintillator detectors to measure the neutron emission spectrum from fusion plasmas, the problem of pile-up distortion can be significant. Because of the large neutron rates encountered in many fusion experiments, some pile-up distortion can remain even after applying traditional pile-up elimination methods, which alters the shape of the measured light-yield spectrum and influences the spectroscopic analysis. Particularly, pile-up events appear as a high-energy tail in the measured light-yield spectrum, which obfuscates the contribution that supra-thermal ions make to the energy spectrum. It is important to understand the behavior of such “fast ions” in fusion plasmas, and it is hence desirable to be able to measure their contribution to the neutron spectrum as accurately as possible. This paper presents a technique for incorporating distortion from undetected pile-up events into the analysis of the light-yield spectrum, hence compensating for pile-up distortion. The spectral contribution from undetected pile-up events is determined using Monte Carlo methods and is included in the spectroscopic study as a pile-up component. The method is applied to data from an NE213 scintillator detector at JET and validated by comparing with results from the time-of-flight spectrometer TOFOR, which is not susceptible to pile-up distortion. Based on the results, we conclude that the suggested analysis method helps counteract the problem of pile-up effects and improves the possibilities for extracting accurate fast-ion information from the light-yield spectrum.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Fusion, Plasma and Space Physics (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
- Fusion, plasma och rymdfysik (hsv)
- Fysik med inriktning mot tillämpad kärnfysik (uu)
- Physics with specialization in Applied Nuclear Physics (uu)
Genre
- government publication (marcgt)
Indexterm och SAB-rubrik
- Plasma heating
- Fusion experiments
- Neutron spectroscopy
- Tokamaks
- Plasma diagnostics
- Neutron emission
- Nuclear fusion
- Liquid scintillators
Inställningar
Hjälp
Ingår i annan publikation. Gå till titeln
Review of Scientific Instruments