Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.81: Poster

Donnerstag, 19. März 2009, 14:00–16:00, Audi-Max

Conceptual Design of a Luminosity Monitor for the PANDA Experiment using Elastic Antiproton-Proton Scattering — •Tsitohaina Randriamalala, James Ritman, and Tobias Stockmanns — Institute for Nuclear Physics, Forschungszentrum Jülich, Germany

The PANDA experiment requires a very precise measurement of both the absolute and relative the luminosity. This will be achieved by luminosity monitor by measuring the elastic pp scattering process at low momentum transfer. Taking the detector and the accelerator system geometry into consideration, the detector will measure the forward outgoing antiproton. As a result, it will be located at about 10m downstream of the target. At this position the luminosity monitor measures particles emitted at 3-8mrad with respect to the beam axis. The detector consists of a sequence of four planes of double sided silicon strip detectors. The planes are separated by 20 cm along the beam direction. Each plane consists of 4 wafers 2cm x 5cm x 300µm, with 50 µm pitch arranged radially to the beam axis and together placed in the vacuum. Simulations have been done in order to reconstruct the angle of the scattered antiprotons. Most of the charge deposited in one sensor is collected by no more than two strips. After smearing the charge deposited, the reconstruction of the mean position of the hit in the cluster were carried out. Position resolutions of about 15µm for strip multiplity one and about 3µm for strip multiplicity two are achieved.

Supported in part by the DAAD and FZ-Jülich