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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 17: Instrumentation III

AKBP 17.1: Vortrag

Donnerstag, 23. März 2023, 17:30–17:45, CHE/0183

Tracing Ionoacoustic Modulations of Broad Energy Distributions — •Alexander Praßelsperger, Felix Balling, Hans-Peter Wieser, Julia Liese, Anna K. Schmidt, Florian Schweiger, Ina Hofrichter, Katia Parodi, and Jörg Schreiber — LMU München, Fakultät für Physik - Medizinische Physik, Am Coulombwall 1, 85748, Garching

Modern laser-plasma based ion accelerators challenge particle detectors with very high beam intensities, strong EMP emission and tens of Hz repetition rates. This calls for new detector types for characterising ion-bunch characteristics. A first step towards this ambition is the ion-bunch energy acoustic tracing (I-BEAT) detector which measures the ionoacoustic signal generated by the energy deposition of energy-selected ion bunches in a water reservoir to reconstruct the incident energy spectrum [1]. Here we propose a new detector concept which expands the I-BEAT approach to arbitrary ion spectra by tracing ionoacoustic modulations of broad energy distributions (TIMBRE). By inserting modulator foils into the water reservoir the deposited energy distribution and the ionoacoustic wave are modulated which allows to reconstruct the ion spectrum on-line by measuring these modulations. The detector is placed within centimetre range behind the laser target to collect most of the accelerated particles. It inherently is EMP and saturation resistant and allows re-usability as the water reservoir does not suffer from major radiation damage. A minimum sensitivity to ion fluences of ≈ 10⁴ protons/mm²/bunch is predicted.

[1] D. Haffa et al. Sci. Rep. 9 (2019) 6714