https://doi.org/10.1140/epja/i2014-14156-0
Special Article - Tools for Experiment and Theory
A recoil detector for the measurement of antiproton-proton elastic scattering at angles close to 90°
1
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
2
Institut für Kernphysik, Forschungszentrum Jülich, 52425, Jülich, Germany
3
Ruhr-Universität Bochum, 44780, Bochum, Germany
4
Zentralinstitut für Engineering, Elektronik und Analytik, Forschungszentrum Jülich, 52425, Jülich, Germany
5
Institut für Kernphysik, Universität Münster, 48149, Münster, Germany
6
University of Chinese Academy of Sciences, 100049, Beijing, China
* e-mail: h.xu@fz-juelich.de
Received:
26
August
2014
Revised:
30
September
2014
Accepted:
3
October
2014
Published online:
23
October
2014
The design and construction of a recoil detector for the measurement of recoil protons of antiproton-proton elastic scattering at scattering angles close to 
are described. The performance of the recoil detector has been tested in the laboratory with radioactive sources and at COSY with proton beams by measuring proton-proton elastic scattering. The results of laboratory tests and commissioning with beam are presented. Excellent energy resolution and proper working performance of the recoil detector validate the conceptual design of the KOALA experiment at HESR to provide the cross section data needed to achieve a precise luminosity determination at the PANDA experiment.
© SIF, Springer-Verlag Berlin Heidelberg, 2014
