Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 51: Instrumentation 16
HK 51.1: Gruppenbericht
Donnerstag, 26. März 2015, 14:30–15:00, M/HS2
Status of the neutron detector NeuLAND in 2014 — •Kenjiro Miki1, Thomas Aumann1,2, Konstanze Boretzky2, Christoph Caesar1, Igor Gasparic3, Michael Heil2, Heiko Scheit1, and Haik Simon2 for the R3B collaboration — 1IKP, TU-Darmstadt, Darmstadt, Germany — 2GSI, Darmstadt, Germany — 3RBI, Zagreb, Croatia
We report on the present status of the new neutron detector NeuLAND designed for the R3B facility at FAIR. The NeuLAND is a segmented large-volume plastic scintillation detector with a designed volume of 2.5 (width) × 2.5 (height) × 3.0 (depth) m3, which will provide high efficiency, good timing resolution and high multi-neutron resolving power. Ten planes of scintillator walls, corresponding to the depth of 0.5 m, have been constructed and tested so far. The performance of this NeuLAND demonstrator was studied with fast neutrons from heavy-ion beams in GSI. The 48Ca, 58Ni and 236,238U beams with incident energies from 400 to 800 MeV/u were impinged on C, Pb, or U target, and neutrons produced around 0 degrees were detected by the NeuLAND. Neutron hit distributions were obtained for one and multiple neutron events, allowing us for detailed response studies. An excellent timing resolution of typically 150 psec (σ) was determined online. The presentation will include the detailed explanation of the experimental setups and obtained results. The outlook comprises further NeuLAND construction and data taking during the next year.
This work is supported by HIC for FAIR, GSI–TU Darmstadt cooperation, ENSAR, and the BMBF project 05P12RDFN8.