| Issue |
EPJ Web Conf.
Volume 134, 2017
Subnuclear Structure of Matter: Achievements and Challenges
|
|
|---|---|---|
| Article Number | 03007 | |
| Number of page(s) | 5 | |
| Section | Hadron dynamics | |
| DOI | https://doi.org/10.1051/epjconf/201713403007 | |
| Published online | 26 January 2017 | |
https://doi.org/10.1051/epjconf/201713403007
Recoil polarization measurements
II. Physikalisches Institut, Justus-Liebig-Universität Gießen
* e-mail: Kai-Thomas.Brinkmann@exp2.physik.uni-giessen.de
Published online: 26 January 2017
Polarization observables in photon-induced meson production off nucleons have long been recognized to hold the promise of a detailed understanding of the excited states in the excitation spectrum of the nucleon. Photon beam and proton target polarization are routinely used at the ELSA facility in the Crystal Barrel/TAPS experiment and have yielded a wealth of data on contributing partial waves and nucleon resonances. A detector study on how to complement these ongoing studies by recoil polarization measurements that offer an orthogonal approach with otherwise unmeasurable observables in the field of non-strange meson photoproduction has been performed.
Building on experience with silicon detectors operated in the photon beamline environment, first possible layouts of Si detector telescopes for recoil protons were developed. Various geometries, e.g. Archimedean spiral design of annular sensors, sector shapes and rectangular sensors were studied and have been used during test measurements. A prototype for the recoil polarimeter was built and subjected to performance tests in protonproton scattering at the COSY-accelerator in Jülich.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.