https://doi.org/10.1140/epja/s10050-023-01018-3
Special Article - New Tools and Techniques
STRASSE: a silicon tracker for quasi-free scattering measurements at the RIBF
1
Institut für Kernphysik, Technische Universität Darmstadt, 64289, Darmstadt, Germany
2
Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, 100875, Beijing, China
3
Normandie University, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000, Caen, France
4
RIKEN Nishina Center, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
5
Department of Physics, Technical University of Munich, 85748, Garching, Germany
6
LTU, Kharkiv, Ukraine
7
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, 152-8551, Meguro, Tokyo, Japan
8
GSI Helmoltzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
9
Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, 172-8501, Toshima, Tokyo, Japan
10
RIKEN, High Energy Nuclear Physics Laboratory, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
Received:
31
December
2022
Accepted:
29
April
2023
Published online:
1
June
2023
Silicon Tracker for RAdioactive nuclei Studies at SAMURAI Experiments is a new detection system under construction for quasi-free scattering (QFS) measurements at 200–250 MeV/nucleon at the RIBF facility of the RIKEN Nishina Center. It consists of a charged-particle silicon tracker coupled with a dedicated thick liquid hydrogen target (up to 150-mm long) in a compact geometry to fit inside large scintillator or germanium arrays. Its design was optimized for two types of studies using QFS: missing-mass measurements and in-flight prompt 
-ray spectroscopy. This article describes (i) the resolution requirements needed to go beyond the sensitivity of existing systems for these two types of measurements, (ii) the conceptual design of the system using detailed simulations of the setup and (iii) its complete technical implementation and challenges. The final tracker aims at a sub-mm reaction vertex resolution and is expected to reach a missing-mass resolution below 2 MeV in 
for (p, 2p) reactions when combined with the CsI(Na) CATANA array.
© The Author(s) 2023
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