Performance of an HRPPD in Tesla-scale magnetic fields
Abstract
High-Rate Picosecond Photodetectors (HRPPDs) are state-of-the-art microchannel-plate (MCP) photodetectors that offer excellent timing and spatial resolution, together with high single-photon detection efficiency. They are currently being considered for the ePIC experiment at the future Electron Ion Collider (EIC) at Brookhaven National Laboratory. A key requirement for the application of this technology is reliable operation in a strong magnetic field up to 1.5 T, with magnetic flux lines at an inclination of ≤15∘ to the normal of the MCP surface. Magnetic field-induced distortions of the collected charge in MCP-based detectors can be compensated by tuning the operating parameters; however, the objective of this study is to quantify this performance in the case of the EIC-HRPPD, a particular MCP stack-up specialized for operation within ePIC. This photosensor employs a high quantum efficiency photocathode, 10μm capillary pores, narrow transfer gaps, and a custom ceramic pixelated DC-coupled readout. This article explores the optimal operating parameters (mainly the voltages applied across the gaps and the MCPs) for single photon detection at various inclination angles in a uniform field up to 1.8 T. Ultimately, it was found that the gain and single photon detection efficiency of the HRPPD could be recovered over a range of polar inclination angles up to ±35∘.
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BibTeX
@misc{azmoun2026performance,
title = {{Performance of an HRPPD in Tesla-scale magnetic fields}},
author = {B. Azmoun and Y. Ilieva and Y. Jin and J. Kim and A. Kiselev and B. S. Page and M. Popecki and M. L. Purschke and A. Tamis and V. Teotia and C. P. Wong and C. Woody},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2608.07858},
eprint = {2608.07858},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.07858},
}
RIS
TY - UNPB
TI - Performance of an HRPPD in Tesla-scale magnetic fields
AU - B. Azmoun
AU - Y. Ilieva
AU - Y. Jin
AU - J. Kim
AU - A. Kiselev
AU - B. S. Page
AU - M. Popecki
AU - M. L. Purschke
AU - A. Tamis
AU - V. Teotia
AU - C. P. Wong
AU - C. Woody
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2608.07858
UR - https://arxiv.org/abs/2608.07858
AB - High-Rate Picosecond Photodetectors (HRPPDs) are state-of-the-art microchannel-plate (MCP) photodetectors that offer excellent timing and spatial resolution, together with high single-photon detection efficiency. They are currently being considered for the ePIC experiment at the future Electron Ion Collider (EIC) at Brookhaven National Laboratory. A key requirement for the application of this technology is reliable operation in a strong magnetic field up to 1.5 T, with magnetic flux lines at an inclination of ≤15^∘ to the normal of the MCP surface. Magnetic field-induced distortions of the collected charge in MCP-based detectors can be compensated by tuning the operating parameters; however, the objective of this study is to quantify this performance in the case of the EIC-HRPPD, a particular MCP stack-up specialized for operation within ePIC. This photosensor employs a high quantum efficiency photocathode, 10μm capillary pores, narrow transfer gaps, and a custom ceramic pixelated DC-coupled readout. This article explores the optimal operating parameters (mainly the voltages applied across the gaps and the MCPs) for single photon detection at various inclination angles in a uniform field up to 1.8 T. Ultimately, it was found that the gain and single photon detection efficiency of the HRPPD could be recovered over a range of polar inclination angles up to ±35^∘.
ER -