SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 4: Instrumentation III

HK 4.5: Vortrag

Montag, 20. März 2023, 17:45–18:00, SCH/A117

Revision of the AGATA Triple Cluster detectors — •Rainer Abels, Jürgen Eberth, Kai Henseler, Herbert Hess, Rouven Hirsch, Darius Luyken, Peter Reiter, and Jasper Wehlitz — IKP Universität zu Köln, Cologne, Germany

The Advanced GAmma Tracking Array (AGATA) is a 4π position sensitive γ-ray spectrometer based on the principle of γ-ray tracking. It provides high energy resolution, high efficiency and position resolution for in beam γ-ray spectroscopy. A high reliability of the AGATA Triple Cluster (ATC) detectors is mandatory for continues long term operation without maintenance of ATC detectors. For this purpose the following modifications were implemented. The HPGe crystals are encapsulated in a new reusable aluminum housing using a temperature resistant full-metal elastic seal. To recover the energy resolution of detectors suffering from neutron damage, a reliable annealing procedure was developed. New vacuum feedthroughs are implemented in order to increase the longevity of the ATCs. To improve the vacuum properties the position of getter materials inside the cold part was put close to the capsules. Novel test procedures for cold j-FETs were developed and new cold core preamplifiers replace obsolete electronic components. After the physics campaign at GANIL, France, AGATA was erected with the revised ATCs at LN Legnaro, Italy. Successful commissioning and first experiments were performed with improved performance values. Supported by BMBF Projects 05P18PKFN9, 05P21PKFN9.