[559] Two (2) 3He/4He Dilution Cryostat Inserts

Design and manufacture two (2) 3He/4He Dilution Cryostat Inserts (two identical examples). The Dilution Insert will be used for neutron scattering experiments with temperatures below 1 K on a wide range of instruments as part of the sample environment pool equipment. Each dilution insert will operate in conjunction with a top loading "wet" 4He-type cryostat or cryomagnet equipped with a variable temperature insert (VTI). The scope of delivery consists of: • Two systems of the dilution insert in the temperature range down to 50 mK. • Each system contains the dilution cryostat insert and the remotely controllable 3He gas handling system, including 2 LN2 cold traps. • 3He/4He mixture must be provided • All electronic devices for the measurement and control of the dilution stick temperature, 3He/4He gas handling parameters, and the environmental cryostat system shall be capable of remote operation. • Full documentation, drawings and source code. Delivery by 30 November 2026 or earlier.

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