The STRASSE liquid hydrogen target system

Madalina Enciu; Christina Xanthopoulou; Alexandru Enciu; Hongna Liu; Alexandre Obertelli; Alexandra I. Stefanescu; Frank Wienholtz

doi:10.1016/j.nima.2026.171754

arXiv · 2606.12582

The STRASSE liquid hydrogen target system

Madalina Enciu·Christina Xanthopoulou·Alexandru Enciu·Hongna Liu·Alexandre Obertelli·Alexandra I. Stefanescu·Frank Wienholtz

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Abstract

A compact liquid hydrogen target system has been developed for the Silicon Tracker for RAdioactive nuclei Studies at SAMURAI Experiments (STRASSE) at the RIKEN Nishina Center. This target, designed for proton-induced quasi-free scattering measurements in inverse kinematics, features a customizable cylindrical cell with a volume up to 125~mL which increases the reaction rate/luminosity, and thin Mylar walls to minimize the protons' angular straggling. The cryogenic system, operated at 20~K, is optimized for rapid cool-down ($\leq$ 5~h) and empty-target measurements, avoiding long experimental dead time. This new setup will allow for high-precision studies of nuclear structure using both missing-mass and in-flight prompt $\gamma$-ray spectroscopy techniques at the RIBF facility.

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Madalina Enciu, Christina Xanthopoulou, Alexandru Enciu, Hongna Liu, Alexandre Obertelli, Alexandra I. Stefanescu, Frank Wienholtz. 2026-06-10. The STRASSE liquid hydrogen target system. https://doi.org/10.1016/j.nima.2026.171754

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