Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Focus Session: Frontiers in Cryogenic Particle Detection

TT 39.8: Vortrag

Mittwoch, 18. März 2020, 18:15–18:30, HSZ 03

MOCCA: operating a full 4k-pixel molecule camera for the position and energy resolved detection of neutral molecular fragments — •Dennis Schulz1, Steffen Allgeier1, Christian Enss1, Andreas Fleischmann1, Lisa Gamer1, Loredana Gastaldo1, Julia Hauer1, Sebastian Kempf1, Oldřich Novotný2, Sebastian Spaniol2, and Andreas Wolf21Kirchhoff-Institute for Physics, Heidelberg University — 2Max-Planck-Institute for Nuclear Physics, Heidelberg

The MOCCA detector is a high-resolution, large-area molecule camera based on metallic magnetic calorimeters and read out with SQUIDs that has the ability to detect neutral molecule fragments with keV kinetic energies. MOCCA is an array of 64 × 64 quadratic pixels with a side length of 700 µm and covers a total detection area of 4.5 cm × 4.5 cm with a filling factor of 99.5 %. It will be deployed at the Cryogenic Storage Ring CSR at the Max Planck Institute for Nuclear Physics in Heidelberg, a storage ring built to prepare and store molecular ions in their rotational and vibrational ground states, enabling studies on electron-ion interactions. To reconstruct the reaction kinematics, MOCCA is able to measure the energy and position of multiple incident particles hitting the detector simultaneously.

We present the fabrication of Through-Wafer Vias together with new measurements of a full-scale MOCCA detector, demonstrating the readout principle, multi-hit capability, and energy resolution of less than 200 eV, combined with a very low cross-talk between pixels.

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