Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$

Josef Sorenson; Martin Hoeferkamp; Gregor Kramberger; Sally Seidel; Jiahe Si

Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$

Instrumentation and Detectors 2024-01-01 v2 High Energy Physics - Experiment

Authors: Josef Sorenson , Martin Hoeferkamp , Gregor Kramberger , Sally Seidel , Jiahe Si

Abstract

Low gain avalanche detectors (LGADs) deliver excellent timing resolution, which can mitigate mis-assignment of vertices associated with pileup at the High Luminosity LHC and other future hadron colliders. The most highly irradiated LGADs will be subject to $2.5 \times10^{15} \mathrm{n}_\mathrm{eq} \mathrm{cm}^{-2}$ of hadronic fluence during HL-LHC operation; their performance must tolerate this. Hamamatsu Photonics K.K. and Fondazione Bruno Kessler LGADs have been irradiated with 400 and 500 MeV protons respectively in several steps up to $1.5 \times10^{15} \mathrm{n}_\mathrm{eq} \mathrm{cm}^{-2}$ . Measurements of the acceptor removal constants of the gain layers, evolution of the timing resolution and charge collection with damage, and inter-channel isolation characteristics, for a variety of design options, are presented here.

Keywords

low gain avalanche detectors proton irradiation hadronic fluence timing resolution charge collection acceptor removal inter-channel isolation

Cite

@article{arxiv.2311.02027,
  title  = {Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$},
  author = {Josef Sorenson and Martin Hoeferkamp and Gregor Kramberger and Sally Seidel and Jiahe Si},
  journal= {arXiv preprint arXiv:2311.02027},
  year   = {2024}
}

Investigation of low gain avalanche detectors exposed to proton fluences beyond 10$^{15}$ n$_\mathrm{eq}$cm$^{-2}$

Abstract

Keywords

Cite

Related papers