
Magnetic Shielding in a Cryogenic Environment
February 14, 2023Each new wave of technological advancement introduces new challenges, and quantum computing is no exception.
Quantum computing systems operate in environments where even weak magnetic interference can impact function, making advanced shielding an essential part of reliable performance.
At Ad-Vance Magnetics Inc., we design and manufacture precision magnetic shielding solutions to help solve this challenge. Our multi-layer shielding is engineered to protect quantum computing systems by optimizing permeability and supporting reliable performance.
What is Quantum Computing?
Quantum computing is an emerging form of computing that uses qubits instead of traditional binary bits.
Though quantum computing technology is much faster than traditional computing, it does not come without its own unique considerations.
The Challenge
Qubits can exist in a state of superposition. This means they can balance between both zero and one at the same time. This behavior supports efficient calculations, but also makes qubits highly sensitive to external factors.
Qubits are affected by even weak magnetic interference, including Earth’s magnetic field. This “magnetic noise” causes a loss of stability, known as decoherence, and disrupts computational functions.
Because qubits are so sensitive, quantum computing systems must be protected from magnetic noise to ensure optimal performance and reliability.
The Ad-Vance Solution: Multi-Layer Magnetic Shields
To address this, Ad-Vance manufactures specialized barriers. We combine material science and precision fabrication to produce nested, multi-layer shielding systems that reduce magnetic field strength before it reaches sensitive components.
We use multiple shielding layers, each optimized for a specific role in reducing field strength, to ensure peak permeability and protect performance.
Outer Layer of Shielding
The outer layer is fabricated from high-saturation Ad-Mu alloys, such as Ad-Mu-48.
This layer is designed to handle stronger external fields. By absorbing and redirecting a significant portion of the magnetic noise, it prevents saturation of the inner shielding layers.
Inner Layers of Shielding
Inner layers are fabricated using high-permeability materials, such as Ad-Mu-80.
These layers pull remaining magnetic field lines into the material and away from the protected quantum computing environment, ensuring function is not compromised.
Annealing
To achieve peak performance, shielding components undergo annealing. This is a controlled heat treatment process that restores and optimizes magnetic permeability, essential for quantum-grade shielding.
DFM for Quantum Systems: Form, Fit, and Function
Although quantum computing is an emerging field, our team has the expertise to provide design for manufacturability (DFM) suggestions to ensure the manufacturability of shielding systems without compromising function.
We consistently work toward one goal: reducing even small ambient fields (such as 0.5 gauss) to a non-factor to provide ideal conditions for quantum computing systems.
To ensure proper fabrication, we prioritize:
- Weld Integrity:
Precision TIG welding is used to maintain magnetic continuity. This is critical because even a small gap or inconsistency in a welded seam can act as a path for magnetic leakage from the Earth’s field.
- Thermal Stability and Fit-Up:
Our team provides feedback on tolerances to account for thermal behavior during design and fabrication. Because these systems often operate in cryogenic environments, material movement due to extreme temperature changes is a real possibility. We account for this to ensure components remain aligned and properly nested after processing.
Building Stable Environments for Quantum Systems
As quantum computing continues to evolve, the need for highly controlled electromagnetic environments will only increase.
At Ad-Vance Magnetics, we are already equipped to take on this challenge.
Our team is actively supporting this next generation of technology with precision-engineered magnetic shielding solutions designed to reduce interference and improve system stability with ultra-low, near-zero-gauss environments.
For support with magnetic shielding solutions for quantum computing applications, request a quote from Ad-Vance Magnetics today.
