July 29, 2022 Dataset Restricted Access

Hensel, Thomas; Weinberger, David; Bemmerer, Daniel; Boretzky, Konstanze; Gasparic, Igor; Stach, Daniel; Wagner, Andreas; Zuber, Kai

MARC21 XML Export

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    <subfield code="a">&lt;p&gt;The NeuLAND (New Large-Area Neutron Detector) plastic scintillator based time of flight detector for 0.2-1.6 GeV&lt;br&gt;
neutrons is currently under construction at the Facility for Antiproton and Ion Research (FAIR), Darmstadt, Germany.&lt;br&gt;
In its final configuration, NeuLAND will consist of 3,000 2.7 m long plastic scintillator bars that are read out on each&lt;br&gt;
end by fast timing photomultipliers.&lt;br&gt;
Here, data from a comprehensive study of an alternative light readout scheme using silicon photomultipliers (SiPM)&lt;br&gt;
are reported.&amp;nbsp; For this purpose, a typical NeuLAND bar was instrumented on each end with a prototype of the same&lt;br&gt;
geometry as a 1&amp;rdquo; photomultiplier tube, including four 6&amp;times;6 mm2 SiPMs, amplifiers, high voltage supply, and micro-&lt;br&gt;
controller.&lt;br&gt;
Tests were carried out using the 35 MeV electron beam from the ELBE superconducting linac with its ps-level time jitter in two different modes of operation, namely parasitic mode with one electron per bunch and single-usermode with 1-60 electrons per bunch, using Acqiris fast digitizers. In addition, offline tests using cosmic rays and the NeuLAND data acquisition scheme were carried out.&lt;br&gt;
Typical time resolutions of &amp;sigma;&amp;le;120 ps were found for &amp;ge; 95% efficiency, improving on previous work at ELBE and exceeding the NeuLAND timing goal of &amp;sigma; &amp;lt;150 ps. Over a range of 10-300 MeV deposited energy in the NeuLAND bar,&amp;nbsp; the&amp;nbsp; gain&amp;nbsp; was&amp;nbsp; found&amp;nbsp; to&amp;nbsp; deviate&amp;nbsp; by &amp;le; 10%&amp;nbsp; (&amp;le;20%)&amp;nbsp; from&amp;nbsp; linearity&amp;nbsp; for&amp;nbsp; 35&amp;mu;m&amp;nbsp; (75&amp;mu;m)&amp;nbsp; SiPM&amp;nbsp; pitch,&amp;nbsp; respectively, satisfactory for calorimetric use of the full NeuLAND detector.&amp;nbsp; The dark rate of the prototype studied was found to&lt;br&gt;
be 70-200 s-1, comparable with the unavoidable cosmic-ray induced background.&lt;/p&gt;

&lt;p&gt;The dataset contains the with the Acqiris Digitzier recorded waveforms and analysis scripts for interpretation of the data. Also GEANT4 simulations of the light propagation in a NeuLAND bar and the electron beam propagation are included.&lt;/p&gt;</subfield>
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