We evaluate the performance of single-clad wavelength-shifting fibers newly developed by Luxium Solutions, BCF-92XL, BCF-9929AXL, and BCF-9995XL and compare them with the multi-clad Kuraray Y-11 fiber. The BCF-XL fibers exhibit faster decay times (92XL: 2.10±0.01 ns, 9929AXL: 2.10±0.02 ns, 9995XL: 2.41±0.03 ns) than Y-11 (7.44±0.06 ns). The attenuation lengths are comparable to that of Y-11 within the measurement range up to 3.2 m. When coupled to an EJ-204 plastic scintillator, the BCF-XL fibers achieve superior time resolution while maintaining light yields comparable to those expected for a single-clad Y-11 fiber.
@article{arxiv.2601.06784,
title = {Performance evaluation of Luxium Solutions BCF-XL wavelength-shifting fibers},
author = {Tatsuki Yamazumi and Yota Endo and Shoma Kodama and Kota Nakagiri and Yasuhiro Nakajima and Minoru Sekiyama and Masashi Yokoyama},
journal= {arXiv preprint arXiv:2601.06784},
year = {2026}
}