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@INPROCEEDINGS{Visser:1037138,
      author       = {Visser, Lino and Neis, Marc and Guimaraes, Jeferson R. and
                      Jerger, Markus and Bushev, Pavel and Mourik, Vincent and
                      Barends, Rami},
      title        = {{T}wo-stage magnetic shielding for superconducting circuits
                      in an adiabatic demagnetization refrigerator},
      school       = {RWTH Aachen},
      reportid     = {FZJ-2025-00485},
      year         = {2024},
      abstract     = {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.},
      month         = {Mar},
      date          = {2024-03-17},
      organization  = {87. Jahrestagung der DPG und
                       DPG-Frühjahrstagung der Sektion
                       Kondensierte Materie (SKM), Berlin
                       (Germany), 17 Mar 2024 - 22 Mar 2024},
      subtyp        = {After Call},
      cin          = {PGI-11 / PGI-13},
      cid          = {I:(DE-Juel1)PGI-11-20170113 / I:(DE-Juel1)PGI-13-20210701},
      pnm          = {5221 - Advanced Solid-State Qubits and Qubit Systems
                      (POF4-522) / EXC 2004:  Matter and Light for Quantum
                      Computing (ML4Q) (390534769)},
      pid          = {G:(DE-HGF)POF4-5221 / G:(BMBF)390534769},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.34734/FZJ-2025-00485},
      url          = {https://juser.fz-juelich.de/record/1037138},
}