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arXiv · 1705.03912

A short-orbit spectrometer for low-energy pion detection in electroproduction experiments at MAMI

D. Baumann·M. Ding·I. Friščić·R. Böhm·D. Bosnar·M. O. Distler·H. Merkel·U. Müller·Th. Walcher·M. Wendel
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Abstract

A new Short-Orbit Spectrometer (SOS) has been constructed and installed within the experimental facility of the A1 collaboration at Mainz Microtron (MAMI), with the goal to detect low-energy pions. It is equipped with a Browne-Buechner magnet and a detector system consisting of two helium-ethane based drift chambers and a scintillator telescope made of five layers. The detector system allows detection of pions in the momentum range of 50 - 147 MeV/c, which corresponds to 8.7 - 63 MeV kinetic energy. The spectrometer can be placed at a distance range of 54 - 66 cm from the target center. Two collimators are available for the measurements, one having 1.8 msr aperture and the other having 7 msr aperture. The Short-Orbit Spectrometer has been successfully calibrated and used in coincidence measurements together with the standard magnetic spectrometers of the A1 collaboration.

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D. Baumann, M. Ding, I. Friščić, R. Böhm, D. Bosnar, M. O. Distler, H. Merkel, U. Müller, Th. Walcher, M. Wendel. 2017-08-22. A short-orbit spectrometer for low-energy pion detection in electroproduction experiments at MAMI. https://doi.org/10.1016/j.nima.2017.08.052

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