Cri/oFlex®

Scalable Room Temperature Interface

Cri/oFlex® features a high-density vacuum feedthrough that provides a room-temperature interface for up to 256 lines, ensuring seamless connectivity across all loader configurations—whether fully populated (256 channels), half populated (128 channels), or quarter populated (64 channels). This interface is always included, supporting modular system design and allowing users to scale their setup according to specific quantum application needs.

Cri/oFlex® Platform and Connectors

Cri/oFlex® flex platforms are tailored for specific quantum control needs: Silver (Ag) is used for microwave drive lines, while superconducting Niobium Titanium (NbTi) is used for flux bias lines below the 4K stage. It offers bandwidths up to 12 GHz, with microwave drive lines operating up to 8 GHz and flux bias lines up to 1 GHz. Each flex is equipped with SMP connectors at both the room temperature and mixing chamber stage, ensuring reliable high-frequency connectivity across thermal stages.

Optimized Heat Management and Noise Control

Cri/oFlex® integrates a carefully distributed attenuation profile across thermal stages to optimize both heat load distribution and noise control. For microwave drive lines, attenuation is applied as follows: -10 dB at 4K, -20 dB at 100 mK, and -20 dB at 10 mK, in addition to the cable’s inherent attenuation. Flux bias lines feature -20 dB attenuation at 4K.

Each line type also includes integrated low-pass filters: 8 GHz for microwave drive lines at 100 mK, and 1 GHz for flux bias lines at 50K. To further suppress infrared noise, Cri/oFlex® incorporates infrared filters at 10 mK: -1 dB/GHz for microwave drive lines and -1.5 dB/GHz for flux bias lines.

Efficient Thermalization

The flexible cables are thermalized using precision clamping, ensuring uninterrupted signal integrity. This method provides an elegant and highly efficient solution for managing thermal load.