Charge-Reversal-Based Extraction of Muonic Ions
Abstract
Negative muon capture in matter is accompanied by Auger electron emission and the formation of positively charged muonic ions. This charge reversal provides a possibility for electromagnetic extraction of the products of muon capture. Here we propose a charge-reversal-based extraction scheme for muonic ions, in which negative muons are moderated and confined in a dilute gas environment before conversion, and the resulting muonic ions are subsequently accelerated and extracted by electrostatic fields. The feasibility of the concept is investigated through order-of-magnitude estimates of the competing processes, including muon moderation, muonic-ion formation, charge exchange, and acceleration in the gas medium. A magnetic-electrostatic deceleration scheme is proposed to reduce the transverse phase space of practical low-energy muon beams while retaining controlled longitudinal motion, and is directly matched to the electrostatic capture region. The analysis indicates that muonic-ion formation and extraction within the muon lifetime are not excluded by fundamental timescale constraints, although the quantitative efficiency remains uncertain because several relevant low-energy cross sections and charge-state populations are poorly constrained experimentally.
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BibTeX
@misc{guo2026chargereversalbased,
title = {{Charge-Reversal-Based Extraction of Muonic Ions}},
author = {Song Guo},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.06923},
eprint = {2611.06923},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.06923},
}
RIS
TY - UNPB
TI - Charge-Reversal-Based Extraction of Muonic Ions
AU - Song Guo
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.06923
UR - https://arxiv.org/abs/2611.06923
AB - Negative muon capture in matter is accompanied by Auger electron emission and the formation of positively charged muonic ions. This charge reversal provides a possibility for electromagnetic extraction of the products of muon capture. Here we propose a charge-reversal-based extraction scheme for muonic ions, in which negative muons are moderated and confined in a dilute gas environment before conversion, and the resulting muonic ions are subsequently accelerated and extracted by electrostatic fields. The feasibility of the concept is investigated through order-of-magnitude estimates of the competing processes, including muon moderation, muonic-ion formation, charge exchange, and acceleration in the gas medium. A magnetic-electrostatic deceleration scheme is proposed to reduce the transverse phase space of practical low-energy muon beams while retaining controlled longitudinal motion, and is directly matched to the electrostatic capture region. The analysis indicates that muonic-ion formation and extraction within the muon lifetime are not excluded by fundamental timescale constraints, although the quantitative efficiency remains uncertain because several relevant low-energy cross sections and charge-state populations are poorly constrained experimentally.
ER -