Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Neutrino Physics II

T 17.5: Vortrag

Montag, 31. März 2025, 17:45–18:00, VG 3.104

Neutron Detection with SANDI II in ANNIE — •Amala Augusthy, Noah Goehlke, Philipp Kern, David Maksimovic, Johann Martyn, Daniel Schmid, Michael Wurm, and Dorina Zundel for the ANNIE collaboration — Institut für Physik and EC PRISMA+, JGU Mainz, Mainz 55128, Germany

ANNIE is an accelerator neutrino experiment at the Booster Neutrino Beam at Fermilab. It is a 26-ton Gadolinium-loaded water Cherenkov detector designed to measure CC interaction cross-sections and neutron multiplicity. In addition, ANNIE serves as a testbed for novel detector technologies amongst which is Water-based Liquid Scintillator (WbLS). WbLS is a novel detection medium that allows the simultaneous detection of scintillation and Cherenkov light. To test the detection capabilities with WbLS, a 366 L cylindrical vessel, filled with Gadolinium (Gd) loaded WbLS, dubbed SANDI II was deployed in ANNIE, in fall 2024. Neutrons are a major source of systematic uncertainty in long baseline neutrino oscillation experiments, hence it is very important to tag neutrons efficiently. To investigate the enhanced neutron detection capabilities of Gd loaded WbLS, an AmBe neutron calibration source was deployed in ANNIE. This talk gives an overview of the preliminary results of the analysis of AmBe data with Gd loaded WbLS. This project is supported by DFG ANNIE and DFG Graduate School GRK 2796: Particle Detectors.

Keywords: Neutrons; Water-based liquid scintillator; Gadolinium; Beam neutrino experiments