Feb 7 – 9, 2017
Radisson Hotel Lansing
US/Eastern timezone

A Charged Particle Veto Wall for the Large Area Neutron Array (LANA)

Feb 7, 2017, 4:45 PM
1h 15m
Radisson Hotel Lansing

Radisson Hotel Lansing

111 N Grand Ave, Lansing, MI 48933
Poster [Main Conference] Poster session

Speaker

Mr kuan zhu (National Superconducting Cyclotron Laboratory)

Description

Comparison of neutrons and protons emitted in heavy ion collisions is one of the observables to probe the density dependence of symmetry energy [Cou16], which is related to the properties of neutron star. In general, neutrons are difficult to measure and neutron detectors are not as easy to use or as widely available as charged particle detectors. Two neutron walls (NW) called LANA exist at the National Superconducting Cyclotron Laboratory. The dimension of the wall is about 2x2 m2. Each NW is made of 25 Pyrex tubes filled with liquid Scintillator NE213 which detects the recoil protons when neutron interact with the scintillator. Although it attains excellent discrimination of γ rays and neutron utilizing Pulse Shape Discrimination (PSD) technique, it fails to discriminate charged particles from neutrons. To ensure near 100% rejection of charged particles, we are building a Charged Particle Veto wall (VW), placed about 0.4 meters in front of one Neutron Wall. To increase efficiency in detecting neutrons, the second neutron wall is stacked behind it. In this presentation, I will discuss the exact design of the VW using simulations with NPTool (based on Geant4 and Root) [Mat16] and the progress of the construction of the VW in preparation of two approved NSCL experiments. This work is supported by the US National Science Foundation Grant No. PHY-1565546 . [Cou16] D. D. S. Coupland et al, Physical Review C 94, 011601(R) (2016) [Mat16] A. Matta et al, J. Phys. G: Nucl. Part. Phys. 43 (2016) 045113

Primary author

Mr kuan zhu (National Superconducting Cyclotron Laboratory)

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