Abstract
Low TC AlMn transition-edge sensors (TESs) have been developed as sensitive thermometers for the Q-Array, which will use superconducting targets to measure the coherent elastic neutrino nucleus scattering spectrum in the RICOCHET experiment. The TESs are made of manganese-doped aluminum with a titanium and gold antioxidation layer. A prototype TES thermometer consists of two TESs in parallel, an input gold pad in metallic contact with the TESs and an output gold pad and gold thermal link meanders, which are each designed to control the flow of heat through the TESs. We have fabricated and measured low TC AlMn TES chips with or without thermal flow control structures. We present TC measurements of the TESs after the initial fabrication and further TC tuning by re-heating and summarize the thermal property studies of the prototype TES thermometer by measuring I-V curves and complex impedance.
Original language | English (US) |
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Pages (from-to) | 209-216 |
Number of pages | 8 |
Journal | Journal of Low Temperature Physics |
Volume | 215 |
Issue number | 3-4 |
DOIs | |
State | Published - May 2024 |
Funding
The work at the Argonne National Laboratory, including the use of facility at the Center for Nanoscale Materials, was supported in part by the Office of Science and in part by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract DE-AC02-06CH11357.
Keywords
- Coherent elastic neutrino nucleus scattering
- Complex impedance
- Cryogenic calorimeter
- Transition-edge sensor
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Materials Science
- Condensed Matter Physics