Monitoring the SNS basement neutron background with the MARS detector

Collaboration, COHERENT

Akimov, D

An, P

Awe, C

Barbeau, PS

Becker, B

Belov, V

Bernardi, I

Blackston, MA

Bock, C

Bolozdynya, A

Browning, J

Cabrera-Palmer, B

Chernyak, D

Conley, E

Daughhetee, J

Detwiler, J

Ding, K

Durand, MR

Efremenko, Y

Elliott, SR

Fabris, L

Febbraro, M

Rosso, A Gallo

Galindo-Uribarri, A

Green, MP

Heath, MR

Hedges, S

Hoang, D

Hughes, M

Johnson, BA

Johnson, T

Khromov, A

Konovalov, A

Kozlova, E

Kumpan, A

Li, L

Link, JM

Liu, J

Mann, K

Markoff, DM

Mastroberti, J

Mueller, PE

Newby, J

Parno, DS

Penttila, SI

Pershey, D

Rapp, R

Ray, H

Raybern, J

Razuvaeva, O

Reyna, D

Rich, GC

Ross, J

Rudik, D

Runge, J

Salvat, DJ

Salyapongse, AM

Scholberg, K

Shakirov, A

Simakov, G

Sinev, G

Snow, WM

Sosnovstsev, V

Suh, B

Tayloe, R

Tellez-Giron-Flores, K

Tolstukhin, I

Ujah, E

Vanderwerp, J

Varner, RL

Virtue, CJ

Visser, G

Wongjirad, T

Yen, Y-R

Yoo, J

Yu, C-H

Zettlemoyer, J

2023-09-07T12:48:00Z

2023-09-07T12:48:00Z

2021-12-05

2023-09-07T12:47:59Z

We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) background for the COHERENT collaboration. MARS was positioned next to the COH-CsI coherent elastic neutrino-nucleus scattering detector in the SNS basement corridor. This is the basement location of closest proximity to the SNS target and thus, of highest neutrino flux, but it is also well shielded from the BRN flux by infill concrete and gravel. These data show the detector registered roughly one BRN per day. Using MARS' measured detection efficiency, the incoming BRN flux is estimated to be $1.20~\pm~0.56~\text{neutrons}/\text{m}^2/\text{MWh}$ for neutron energies above $\sim3.5$ MeV and up to a few tens of MeV. We compare our results with previous BRN measurements in the SNS basement corridor reported by other neutron detectors.

https://hdl.handle.net/10161/28977

JINST

physics.ins-det

physics.ins-det

hep-ex

Monitoring the SNS basement neutron background with the MARS detector

Journal article

Barbeau, PS|0000-0002-8891-8988

Scholberg, K|0000-0002-7007-2021

P03021

Duke

Trinity College of Arts & Sciences

Physics

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