Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 29: Poster Session: Cryogenic Particle Detectors and Cyotechnique
TT 29.9: Poster
Monday, March 12, 2018, 15:00–19:00, Poster B
MOCCA: A 4k-pixel molecule camera for the position and energy resolving detection of neutral molecule fragments at the Cryogenic Storage Ring CSR — •Dennis Schulz1, Steffen Allgeier1, Christian Enss1, Andreas Fleischmann1, Lisa Gamer1, Loredana Gastaldo1, Sebastian Kempf1, Oldřich Novotný2, and Andreas Wolf2 — 1Kirchhoff-Institute for Physics, Heidelberg — 2Max Planck Institute for Nuclear Physics, Heidelberg
The Cryogenic Storage Ring CSR at the Max Planck Institute for Nuclear Physics in Heidelberg can be used to prepare and store molecular ions in their rotational and vibrational ground states, enabling state-resolved studies on electron-ion interactions. The use of Metallic Magnetic Calorimeters for particle detection allows for identifying all neutral reaction products, using the deposited energy of incident particles into MMC absorbers as a measure of the particle mass. To resolve the complete reaction kinematics, a position sensitive coincident detection of multiple reaction products is necessary.
For those 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, multi-hit capability, cross-talk and the integration of its 3He/4He dilution refrigerator into the setup of the CSR. We show first measurements and the expected energy resolution.