Abatement of Ionizing Radiation for Superconducting Quantum Devices
- URL: http://arxiv.org/abs/2403.01032v1
- Date: Fri, 1 Mar 2024 23:38:56 GMT
- Title: Abatement of Ionizing Radiation for Superconducting Quantum Devices
- Authors: B. Loer (1), P. M. Harrington (2), B. Archambault (1), E. Fuller (1),
B. Pierson (1), I. Arnquist (1), K. Harouaka (1), T. D. Schlieder (1), D. K.
Kim (c), A. J. Melville (c), B. M. Niedzielski (3), J. K. Yoder (3), K.
Serniak (2 and 3), W. D. Oliver (2 and 3), J. L. Orrell (1), R. Bunker (1),
B. A. VanDevender (1), M. Warner (1) ((1) Pacific Northwest National
Laboratory, (2) Research Laboratory of Electronics, Massachusetts Institute
of Technology, (3) MIT Lincoln Laboratory)
- Abstract summary: Ionizing radiation has been shown to reduce the performance of superconducting quantum circuits.
We present a shallow underground facility to reduce the flux of cosmic rays and a lead shielded cryostat to abate the naturally occurring radiogenic gamma-ray flux.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Ionizing radiation has been shown to reduce the performance of
superconducting quantum circuits. In this report, we evaluate the expected
contributions of different sources of ambient radioactivity for typical
superconducting qubit experiment platforms. Our assessment of radioactivity
inside a typical cryostat highlights the importance of selecting appropriate
materials for the experiment components nearest to qubit devices, such as
packaging and electrical interconnects. We present a shallow underground
facility (30-meter water equivalent) to reduce the flux of cosmic rays and a
lead shielded cryostat to abate the naturally occurring radiogenic gamma-ray
flux in the laboratory environment. We predict that superconducting qubit
devices operated in this facility could experience a reduced rate of correlated
multi-qubit errors by a factor of approximately 20 relative to the rate in a
typical above-ground, unshielded facility. Finally, we outline overall design
improvements that would be required to further reduce the residual ionizing
radiation rate, down to the limit of current generation direct detection dark
matter experiments.
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