TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR

Līga Avotiņa; Mihails Haļitovs; Patrīcija Kalniņa; Gunta Ķizāne; Andris Leščinskis; Elīna Pajuste; Anete Stīne Teimane; Aigars Vītiņš; Rūdolfs Jānis Zabolockis; Artūrs Zariņš; JET Contributors

doi:10.1016/j.nima.2023.168126

TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR

Līga Avotiņa
, Mihails Haļitovs
, Patrīcija Kalniņa
, Gunta Ķizāne
, Andris Leščinskis
, Elīna Pajuste
, Anete Stīne Teimane
, Aigars Vītiņš
, Rūdolfs Jānis Zabolockis
, Artūrs Zariņš
, JET Contributors

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

TOFOR is a time-of-flight (TOF) neutron spectrometer located at the Joint European Torus (JET) with a vertical sightline of the JET plasma. It consists of 5 start (denoted S1) and 32 stop (denoted S2) plastic scintillation detectors which can be used in coincidence to generate a TOF spectrum. Spectroscopic analysis of the neutron TOF spectra produced by the JET plasma is regularly performed to determine, e.g., the fuel ion ratio and the presence of fast ion species in the fusion plasma. TOFOR has been upgraded with a new digital data acquisition (DAQ) system, denoted TOFu, which consists of 10 waveform digitizers with a total of 40 channels, 37 of which are connected to the photomultiplier output of the different S1 and S2 detectors. This paper presents a technical overview of the TOFu system and describes the offline analysis capabilities of TOFu which were not available with the previous DAQ system. Two experimental JET discharges are studied and used to show that the signal-to-background ratio is improved by almost 200% for the 2.5 MeV neutron signal and almost 400% for the 14 MeV neutron signal using the new offline analysis capabilities.

Original language	English
Article number	168126
Pages (from-to)	1-10
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1049
DOIs	https://doi.org/10.1016/j.nima.2023.168126
Publication status	Published - Apr 2023

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SDG 7 Affordable and Clean Energy

Keywords

Data acquisition system
Joint European Torus
Neutron spectrometry
Time-of-flight
TOFOR
TOFu

Access to Document

10.1016/j.nima.2023.168126

Cite this

Avotiņa, L., Haļitovs, M., Kalniņa, P., Ķizāne, G., Leščinskis, A., Pajuste, E., Teimane, A. S., Vītiņš, A., Zabolockis, R. J., Zariņš, A., & Contributors, JET. (2023). TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1049, 1-10. Article 168126. https://doi.org/10.1016/j.nima.2023.168126

@article{1d0fc1183d0e4431930eec5e8857fb3f,

title = "TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR",

abstract = "TOFOR is a time-of-flight (TOF) neutron spectrometer located at the Joint European Torus (JET) with a vertical sightline of the JET plasma. It consists of 5 start (denoted S1) and 32 stop (denoted S2) plastic scintillation detectors which can be used in coincidence to generate a TOF spectrum. Spectroscopic analysis of the neutron TOF spectra produced by the JET plasma is regularly performed to determine, e.g., the fuel ion ratio and the presence of fast ion species in the fusion plasma. TOFOR has been upgraded with a new digital data acquisition (DAQ) system, denoted TOFu, which consists of 10 waveform digitizers with a total of 40 channels, 37 of which are connected to the photomultiplier output of the different S1 and S2 detectors. This paper presents a technical overview of the TOFu system and describes the offline analysis capabilities of TOFu which were not available with the previous DAQ system. Two experimental JET discharges are studied and used to show that the signal-to-background ratio is improved by almost 200\% for the 2.5 MeV neutron signal and almost 400\% for the 14 MeV neutron signal using the new offline analysis capabilities.",

keywords = "Data acquisition system, Joint European Torus, Neutron spectrometry, Time-of-flight, TOFOR, TOFu",

author = "Līga Avotiņa and Mihails Haļitovs and Patrīcija Kalniņa and Gunta Ķizāne and Andris Le{\v s}{\v c}inskis and Elīna Pajuste and Teimane, \{Anete Stīne\} and Aigars Vītiņ{\v s} and Zabolockis, \{Rūdolfs Jānis\} and Artūrs Zariņ{\v s} and JET Contributors",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

month = apr,

doi = "10.1016/j.nima.2023.168126",

language = "English",

volume = "1049",

pages = "1--10",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

}

Avotiņa, L, Haļitovs, M, Kalniņa, P, Ķizāne, G, Leščinskis, A, Pajuste, E , Teimane, AS, Vītiņš, A, Zabolockis, RJ , Zariņš, A & Contributors, JET 2023, 'TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1049, 168126, pp. 1-10. https://doi.org/10.1016/j.nima.2023.168126

TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR. / Avotiņa, Līga; Haļitovs, Mihails; Kalniņa, Patrīcija et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1049, 168126, 04.2023, p. 1-10.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR

AU - Avotiņa, Līga

AU - Haļitovs, Mihails

AU - Kalniņa, Patrīcija

AU - Ķizāne, Gunta

AU - Leščinskis, Andris

AU - Pajuste, Elīna

AU - Teimane, Anete Stīne

AU - Vītiņš, Aigars

AU - Zabolockis, Rūdolfs Jānis

AU - Zariņš, Artūrs

AU - Contributors, JET

PY - 2023/4

Y1 - 2023/4

N2 - TOFOR is a time-of-flight (TOF) neutron spectrometer located at the Joint European Torus (JET) with a vertical sightline of the JET plasma. It consists of 5 start (denoted S1) and 32 stop (denoted S2) plastic scintillation detectors which can be used in coincidence to generate a TOF spectrum. Spectroscopic analysis of the neutron TOF spectra produced by the JET plasma is regularly performed to determine, e.g., the fuel ion ratio and the presence of fast ion species in the fusion plasma. TOFOR has been upgraded with a new digital data acquisition (DAQ) system, denoted TOFu, which consists of 10 waveform digitizers with a total of 40 channels, 37 of which are connected to the photomultiplier output of the different S1 and S2 detectors. This paper presents a technical overview of the TOFu system and describes the offline analysis capabilities of TOFu which were not available with the previous DAQ system. Two experimental JET discharges are studied and used to show that the signal-to-background ratio is improved by almost 200% for the 2.5 MeV neutron signal and almost 400% for the 14 MeV neutron signal using the new offline analysis capabilities.

AB - TOFOR is a time-of-flight (TOF) neutron spectrometer located at the Joint European Torus (JET) with a vertical sightline of the JET plasma. It consists of 5 start (denoted S1) and 32 stop (denoted S2) plastic scintillation detectors which can be used in coincidence to generate a TOF spectrum. Spectroscopic analysis of the neutron TOF spectra produced by the JET plasma is regularly performed to determine, e.g., the fuel ion ratio and the presence of fast ion species in the fusion plasma. TOFOR has been upgraded with a new digital data acquisition (DAQ) system, denoted TOFu, which consists of 10 waveform digitizers with a total of 40 channels, 37 of which are connected to the photomultiplier output of the different S1 and S2 detectors. This paper presents a technical overview of the TOFu system and describes the offline analysis capabilities of TOFu which were not available with the previous DAQ system. Two experimental JET discharges are studied and used to show that the signal-to-background ratio is improved by almost 200% for the 2.5 MeV neutron signal and almost 400% for the 14 MeV neutron signal using the new offline analysis capabilities.

KW - Data acquisition system

KW - Joint European Torus

KW - Neutron spectrometry

KW - Time-of-flight

KW - TOFOR

KW - TOFu

UR - https://www.sciencedirect.com/science/article/pii/S016890022300116X

UR - https://www.scopus.com/pages/publications/85147983383

U2 - 10.1016/j.nima.2023.168126

DO - 10.1016/j.nima.2023.168126

M3 - Article

SN - 0168-9002

VL - 1049

SP - 1

EP - 10

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 168126

ER -

Avotiņa L, Haļitovs M, Kalniņa P, Ķizāne G, Leščinskis A, Pajuste E et al. TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2023 Apr;1049:1-10. 168126. doi: 10.1016/j.nima.2023.168126

TOFu: A fully digital data acquisition system upgrade for the neutron time-of-flight spectrometer TOFOR

Abstract

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Keywords

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