Charge-Reversal-Based Extraction of Muonic Ions
Charge-Reversal-Based Extraction of Muonic Ions
Song GUO1
作者信息
- 1. Insitute of Modern Physics, Chinese Academy of Sciences
- 折叠
摘要
Negative muon capture in matter is accompanied by Auger electron emission andthe formation of positively charged muonic ions. This charge reversal providesa possibility for electromagnetic extraction of the products of muon capture.Here we propose a charge-reversal-based extraction scheme for muonic ions, inwhich negative muons are moderated and confined in a dilute gas environmentbefore conversion, and the resulting muonic ions are subsequently acceleratedand extracted by electrostatic fields. The feasibility of the concept isinvestigated through order-of-magnitude estimates of the competing processes,including muon moderation, muonic-ion formation, charge exchange, andacceleration in the gas medium. A magnetic-electrostatic deceleration scheme isproposed to reduce the transverse phase space of practical low-energy muonbeams while retaining controlled longitudinal motion, and is directly matchedto the electrostatic capture region. The analysis indicates that muonic-ionformation and extraction within the muon lifetime are not excluded byfundamental timescale constraints, although the quantitative efficiency remainsuncertain because several relevant low-energy cross sections and charge-statepopulations are poorly constrained experimentally.
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 conditioning scheme is proposed to reduce the spatial and momentum spreads of practical low-energy muon beams while maintaining sufficient directed motion for transport into the 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 stopping, scattering, capture, and charge-state processes are poorly constrained experimentally.关键词
muon/Auger electron emission/muon CaptureKey words
muon/Auger electron emission/muon Capture引用本文复制引用
Song GUO.Charge-Reversal-Based Extraction of Muonic Ions[EB/OL].(2026-09-27)[2026-10-01].https://chinaxiv.org/abs/202609.00008.学科分类
粒子探测技术、辐射探测技术、核仪器仪表
