Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 21: Superconductivity: Poster Session
TT 21.51: Poster
Montag, 16. März 2015, 15:00–18:00, Poster B
A large-area 4k-pixel detector for position and energy resolving detection of neutral molecular fragments — •D. Schulz1, L. Gamer1, A. Fleischmann1, L. Gastaldo1, S. Kempf1, C. Krantz2, O. Novotny3, A. Wolf2, and C. Enss1 — 1KIP Heidelberg University. — 2MPI-K Heidelberg. — 3Columbia Astrophysics Laboratory, New York, USA.
To investigate reactions like dissociative recombination in a laboratory environment, the Max Planck Institute for Nuclear Physics in Heidelberg is commissioning the Cryogenic Storage Ring to prepare molecular ions in their rotational and vibrational ground state. The full kinematics of these processes can be resolved by a position and energy sensitive detection of the produced neutral molecular fragments.
We present the design of a new large-area multi-pixel detector using metallic magnetic calorimeters for position and energy sensitive detection of massive particles with kinetic energies of up to a few hundred keV. The detector encompasses an array of 4096 quadratic absorbers, each with a side length of 700 µm, amounting to a total detection area of about 20 cm2. Groups of four absorbers are thermally connected to one paramagnetic sensor, using different thermal links for pixel discrimination. A temperature change in the paramagnetic sensor leads to a change of magnetization in the sensor. Thanks to a novel readout scheme, all 4096 sensors can be read out using at total of 32 SQUIDs only.