TY  - CONF
AU  - Visser, Lino
AU  - Neis, Marc
AU  - Guimaraes, Jeferson R.
AU  - Jerger, Markus
AU  - Bushev, Pavel
AU  - Mourik, Vincent
AU  - Barends, Rami
TI  - Two-stage magnetic shielding for superconducting circuits in an adiabatic demagnetization refrigerator
PB  - RWTH Aachen
M1  - FZJ-2025-00485
PY  - 2024
AB  - Adiabatic demagnetization refrigeration (ADR) is a promising technology for future quantum technology applications. Cooling units for ADRs are cheap and reliable while enabling base temperatures comparable to those obtained in dilution refrigerators. A challenge are the residual magnetic fields originating from the magnet used for recharging the paramagnetic salts, as these lower the operation fidelity of superconducting circuits. Here, we present the design of a 4 Kelvin two-stage mu-metal and Niobium magnetic shield with ports for 4 RF wires, and 48 DC lines. The lowest temperature stage enters the magnetic shield through a feedthrough, and contains an additional Copper infrared shield around the sample space. Using finite element simulations, we quantify the magnetic shielding factor before manufacturing. To benchmark the ADRs shielding performance, we characterize a set of Niobium resonators, measuring their quality factor. First results indicate a competitive performance of these resonators in our customized set-up.
T2  - 87. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM)
CY  - 17 Mar 2024 - 22 Mar 2024, Berlin (Germany)
Y2  - 17 Mar 2024 - 22 Mar 2024
M2  - Berlin, Germany
LB  - PUB:(DE-HGF)24
DO  - DOI:10.34734/FZJ-2025-00485
UR  - https://juser.fz-juelich.de/record/1037138
ER  -