Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 55: Poster Session: Superconductivity 2
TT 55.18: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P2-OG3
MOCCA: A 4k-pixel molecule camera for the position and energy resolving detection of neutral molecule fragments at the Cryogenic Storage Ring CSR — •S. Allgeier1, C. Enss1, A. Fleischmann1, L. Gamer1, L. Gastaldo1, S. Kempf1, C. Krantz2, O. Novotný2, D. Schulz1, and A. Wolf2 — 1Heidelberg University — 2MPIK Heidelberg
The Cryogenic Storage Ring CSR at the Max Planck Institute for Nuclear Physics in Heidelberg is designed to prepare and store molecular ions in their rotational and vibrational ground states. A key requirement for the study of electron-ion interactions within CSR is the identification of reaction products. The use of metallic magnetic calorimeters (MMCs) allows for identifying all neutral products since the deposited kinetic energy of incident particles into MMC absorbers can be used as a measure of the particle mass. To actually resolve the full reaction kinematics, a position sensitive coincident detection of multiple reaction products is necessary.
For these measurements we designed MOCCA, a 4k-pixel molecule camera based on MMCs with a detection area of 45 mm × 45 mm, which is segmented into 64×64 absorbers and read out using only 32 SQUIDs. We discuss the detector design and its microfabrication as well as its multi-hit capability, cross-talk and expected energy resolution for photons and massive particles. In addition, we outline our plans for integrating MOCCA and its 3He/4He dilution refrigerator into CSR.