Introducing a New Solution for Cryostat Connection Panels
Revolutionizing Signal Transmission in Vacuum Environments
Greetings! Currently, I am in the process of developing a cutting-edge connection-panel for a cryostat samplestick. This project entails the transmission of 24-30 coaxial signals from a vacuum environment (~0.1-10mbar or 1ATM of He) to the external world.
One of the key challenges I face is the need to maintain separate grounds for each signal, particularly to establish a star-ground configuration near the sample within the cryostat. To achieve this, it is crucial that the connectors’ ground remains isolated from its mount. However, the search for vacuum-sealed isolated connectors has proven to be a daunting task.
One alternative approach involves utilizing standard connectors such as SMA and implementing an isolating panel. While feasible, this method may not offer optimal shielding capabilities.
Considering these constraints, an innovative idea emerged: Why not employ a PCB as the interface panel? By soldering PCB-mount connectors and managing the cabling internally, this solution presents a promising opportunity. Additionally, utilizing a two-layer PCB with a dedicated groundplane can significantly enhance RF shielding.
Now, a critical question arises: Can a standard FR-4 PCB maintain air/He-tight integrity at room temperature?
Your insights, comments, and inquiries are highly valued as I embark on this groundbreaking endeavor.
- Explore more about PCB fabrication here.
