Dresden 2026 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: Plasma Accelerators, Diagnostics I

AKBP 10.4: Talk

Wednesday, March 11, 2026, 16:00–16:15, SCH/A117

Time-Resolved Interferometry Measurement of Ultrasound Pulses generated by Laser-Accelerated Ions in Water — •Hannah Forsthuber, Julia Liese, Florian Schweiger, Alexander Praßelsperger, Sonja Gerlach, Xiang Chen, Kumudini Pagare, and Jörg Schreiber — LMU München, Fakultät für Physik - Medizinische Physik, Am Coulombwall 1, 85748 Garching

Recent progress in laser-driven ion acceleration and its applications in radiation-therapy research demands sensitive techniques to probe processes like ionoacoustic pressure waves. Building on earlier work using optical detection of refractive-index changes caused by ion beams in water, this project investigates a Mach-Zehnder interferometric approach operated near destructive interference. By combining high optical intensities with a balanced-detection scheme, the setup aims to enhance sensitivity to the weak acoustic signatures generated by laser-accelerated ion bunches at LMU's Center for Advanced Laser Applications. The method targets temporally and spatially resolved measurements of the pressure-wave evolution within the interaction volume, providing complementary information to transducer-based diagnostics [1]. The performance of the interferometric system will be evaluated in forthcoming experiments, with initial results expected by the time of the conference. Ultimately, this optical technique aims to deepen the understanding of ion-induced acoustic phenomena and to advance diagnostic capabilities for laser-accelerated ion sources in radiation-research environments.[1] S. Gerlach et al., High Power Laser Science and Engineering 11, 38 (2023)

Keywords: Interferometry; Ionoacoustics; Pressure-wave; Balanced detector; Laser Ion-Acceleration