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

被引：3
|
作者：
Eriksson, B. [1 ]
Conroy, S. [1 ]
Ericsson, G. [1 ]
Eriksson, J. [1 ]
Hjalmarsson, A. [1 ]
Weiszflog, M. [1 ]
Ghani, Z. [2 ]
Maslov, M. [2 ]
JET Contributors
机构：
[1] Uppsala Univ, Dept Phys & Astron, Lagerhyddsvagen 1, S-75237 Uppsala, Sweden
[2] Culham Sci Ctr, Culham Ctr Fus Energy, UKAEA, Abingdon OX14 3DB, England
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2023年 / 1049卷
关键词：
TOFOR; Data acquisition system; TOFu; Time-of-flight; Neutron spectrometry; Joint European Torus;
D O I：
10.1016/j.nima.2023.168126
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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.
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页数：10
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