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MO: Fachverband Molekülphysik
MO 20: Poster – Molecular Collisions and Kinetics
MO 20.1: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG
MOCCA: A molecule camera for the position and energy resolved detection of neutral molecule fragments — •N. Fiedler1, A. Fleischmann1, C. A. Jakob2, D. Kreuzberger1, A. Özkara1, D. Hengstler1, A. Reifenberger1, L. Gastaldo1, P. Martini3, S. Rosén3, H. Zettergren3, O. Novotný2, H. T. Schmidt3, and C. Enss1 — 1Kirchhoff Institute for Physics, Heidelberg University — 2Max Planck Institute for Nuclear Physics, Heidelberg — 3Department of Physics, Stockholm University
The MOCCA detector is a high-resolution camera for neutral molecule fragments with kinetic energies in the keV range. It features several thousand pixels based on metallic magnetic calorimeters and is read out using SQUIDs. To reconstruct the kinematics of electron-ion and ion-ion reactions, MOCCA measures both the energy and the impact position of molecular fragments incident on the detector, even with multiple particles hitting the detector simultaneously. The latest fabricated version is currently being deployed at the Cryogenic Storage Ring (CSR) at the Max Planck Institute for Nuclear Physics in Heidelberg, where molecular ions are stored and prepared in their rotational and vibrational ground states, allowing detailed studies of electron-ion interactions. We present plans for integrating the 11.5k-pixel MOCCA-Quattro detector system into the Double ElectroStatic Ion Ring ExpEriment (DESIREE) at Stockholm University, which enables mutual neutralization of ions at extremely small relative velocities. This will significantly enhance studies of neutralization processes in complex molecules prepared in their quantum ground state.
Keywords: Metallic Magnetic Calorimeter; Neutral Molecule Detector; Cryogenic Ion Storage Ring