A low mass optical grid for the PROSPECT reactor antineutrino detector
2019
PROSPECT, the Precision Reactor Oscillation and SPECTrum experiment, is a short-baseline reactor antineutrino experiment designed to provide precision measurements of the $^{235}$U product $\
overline{\nu}_e$ spectrum of utilizing an optically segmented 4-ton liquid scintillator detector. PROSPECT's segmentation system, the optical grid, plays a central role in reconstructing the position and energy of $\
overline{\nu}_e$ interactions in the detector. This paper is the technical reference for this
PROSPECTsubsystem, describing its design, fabrication, quality assurance, transportation and assembly in detail. In addition, the dimensional, optical and mechanical characterizations of optical grid components and the assembled
PROSPECTtarget are also presented. The technical information and characterizations detailed here will
inform geometry-related inputs for
PROSPECTphysics analysis, and can guide a variety of future particle detection development efforts, such as those using optically reflecting materials or filament-based 3D printing.
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