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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Instrumentation VI

HK 27.1: Gruppenbericht

Dienstag, 12. März 2024, 17:30–18:00, HBR 19: C 1

The PANDA Luminosity Detector — •René Hagdorn¹, Niels Boelger¹, Stephan Bökelmann¹, Achim Denig², Florian Feldbauer¹, Miriam Fritsch¹, Roman Klasen¹, Heinrich Leithoff², Jinxin Li¹, Stephan Maldaner¹, Christof Motzko³, Jannik Petersen², and Gerhard Reicherz¹ for the PANDA collaboration — ¹Ruhr-Universität Bochum — ²Johannes-Gutenberg-Universität Mainz — ³Helmholtz-Institut Mainz

The PANDA experiment is primarily focused on hadron spectroscopy. It will be situated at the FAIR accelerator complex, currently under construction in Darmstadt. In order to determine the cross sections of occurring processes a precise knowledge of the luminosity is crucial. The luminosity will be measured with the Luminosity Detector. This detector is a tracking detector, which provides the angular distribution of the tracks of elastically scattered antiprotons at small scattering angles. This way, a precision of < 5 % for the absolute time-integrated luminosity can be reached.

The detector consists of four layers of silicon pixel sensors (HV-MAPS) which combine the sensitive detection area and the readout electronics on the same chip. The sensors are glued to both sides of CVD-diamond carriers and mounted to a movable holding structure. To prevent disturbances of the primary beam the whole setup is operated in vacuum, introducing the need of an active cooling system.

The concept of the luminosity determination at PANDA is explained and the detector components including the sensor modules, cooling system, vacuum control, and data acquisition system are presented.

Keywords: PANDA experiment; Hadron spectroscopy; Luminosity; Tracking detectors; HV-MAPS