Summary
This work demonstrates the integration of ultra-thin monolithic Si-pixel detectors into muon-spin spectroscopy (µSR) to achieve sub-millimeter spatial resolution and high-rate measurements. It also explores triggerless pump-probe µSR techniques for advanced quantum material studies.
Highlights
- Use of ultra-thin Si-pixel detectors for precise muon stopping position reconstruction.
- Enhanced measurement capability at higher muon rates overcoming current spectrometer limits.
- Development of triggerless pump-probe µSR data acquisition system.
- Sub-millimeter spatial resolution surpassing existing µSR instruments.
- Simulation and prototype tests validating detector design and performance.
- Ability to correlate muon and positron tracks to reduce background signals.
- Potential for continuous, high-rate real-time data streaming without external triggers.
Key Insights
- Si-Pixel Detector Integration: Employing ultra-thin monolithic silicon pixel detectors enables precise vertex reconstruction of muon stopping points, significantly improving spatial resolution beyond traditional scintillator-based setups.
- Higher Muon Rate Measurements: The proposed detector system can handle muon rates exceeding the current 40–120 kHz limitation of existing instruments, addressing challenges posed by future high-intensity muon beams.
- Triggerless Data Acquisition: Introducing a triggerless DAQ scheme allows continuous streaming of muon and positron event data, removing the need for external triggers and enabling advanced pump-probe experiments with improved temporal resolution.
- Background Suppression: By tracking both muons and decay positrons and correlating their trajectories, the system effectively suppresses uncorrelated background, enhancing signal fidelity.
- Simulation and Experimental Validation: Simulation results of energy deposition and position reconstruction demonstrate the detector’s ability to resolve muon stopping within millimeter precision, validated by prototype measurements.
- Pump-Probe Measurement Capability: The system paves the way for synchronizing external stimuli (e.g., laser pulses) with muon detection, facilitating studies of transient magnetic and electronic states with high temporal accuracy.
- Advancement in µSR Spectroscopy: Overall, this approach represents a significant technological advancement for muon-spin spectroscopy, broadening its applicability to novel quantum materials and dynamic phenomena.
Mindmap
If MindMap doesn't load, please try refreshing the page.
Citation
Augustin, H., Berger, N., Doll, A., Isenring, P., Köppel, M., Krieger, J. A., … Salman, Z. (2025). New Frontiers in Muon-Spin Spectroscopy Using Si-Pixel Detectors (Version 1). arXiv. http://doi.org/10.48550/ARXIV.2504.12993