Publications
Publication Information
| Title | The CLAS12 Backward Angle Neutron Detector (BAND) |
| Authors | Efrain Segarra, Florian Hauenstein, Axel Schmidt, Arie Beck, Sharon Beck, Reynier Cruz Torres, Andrew Denniston, Adin Hrnjic, Tyler Kutz, Anjali Nambrath, Jackson Pybus, K. Pryce, Caleb Fogler, Thomas Hartlove, Lawrence Weinstein, Juan Vega Vergara, Milan Ungerer, Hayk Hakobyan, William Brooks, Eliazer Piasetzky, Erez Cohen, Meytal Duer, Igor Korover, Jason Barlow, Edmundo Barriga Ruiz, Paul Eugenio, Alexander Ostrovidov, Or Chen |
| JLAB number | JLAB-PHY-20-3206 |
| LANL number | arXiv:2004.10339 |
| Other number | DOE/OR/23177-5007 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Nuclear Instruments & Methods in Physics Research, Section A Volume 978 Page(s) 164356 Refereed | |
| Publication Abstract: | The Backward Angle Neutron Detector (BAND) of CLAS12 detects neutrons emitted at backward angles of $155^\circ$ to $175^\circ$, with momenta between $200$ and $600$ MeV/c. It is positioned 3 meters upstream of the target, consists of $18$ rows and $5$ layers of $7.2$ cm by $7.2$ cm scintillator bars, and read out on both ends by PMTs to measure time and energy deposition in the scintillator layers. Between the target and BAND there is a 2 cm thick lead wall followed by a 2 cm veto layer to suppress gammas and reject charged particles. This paper discusses the component-selection tests and the detector assembly. Timing calibrations (including offsets and time-walk) were performed using a novel pulsed-laser calibration system, resulting in time resolutions better than $250$ ps (150 ps) for energy depositions above 2 MeVee (5 MeVee). Cosmic rays and a variety of radioactive sources were used to calibration the energy response of the detector. Scintillator bar attenuation lengths were measured. The time resolution results in a neutron momentum reconstruction resolution, $\delta p/p < 1.5$\% for neutron momentum $200\le p\le 600$ MeV/c. Final performance of the BAND with CLAS12 is shown, including electron-neutral particle timing spectra and a discussion of the off-time neutral contamination as a function of energy deposition threshold. |
| Experiment Numbers: | |
| Group: | Hall B |
| Document: | |
| DOI: | https://doi.org/10.1016/j.nima.2020.164356 |
| Accepted Manuscript: | 1-s2.0-S0168900220307531-main.pdf |
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