20 Kelvin Vacuum Cryostat

The MSSL 20 Kelvin vacuum cryostat is a multi shroud design.

The vacuum cryostat is 900 mm long by 600 mm diameter and comprises of:

• Outer stainless steel (type 304) chamber
• An outer electroless nickel plated aluminium chamber
• An outer G10 chamber
• An inner electroless nickel plated aluminium chamber
• An inner G10 chamber
• An electroless nickel coated aluminium chamber which houses the flight hardware
• A pulse cooler with extended cold head
• A single piece construction gold coated copper strap which acts as an interface between the pulse cooler cold head and the instrument mounting base
• An inner and outer beam CaF2 input/output window system designed to minimise the external environment influences

 This type of chamber design allows for efficient thermal de-coupling of the external environment to the flight harware instrument mounted in the cryostat.

Specification

Dimensions: 1m diameter by 1.1m long.

Hardware mounting area: 0.4m diameter by 0.6m height

Base vacuum pressure: 5 x 10-5 mBar.

Temperature range: 20K to 360K

Temperature control: Closed loop PID control, +0.2K -0.2K.

Temperature measurement: Eight Cernox sensors.

Temperature and pressure logging: 8 channel plus pressure logging, user set logging interval.

Electrical feedthroughs: Various Micro D-Sub connectors

Resources:

Vacuum Test Facility:
Thermal Vacuum
20k Cryostat
77K Cryostat
Vacuum Bakeout

Vibration Test Facility:
Ling Dynamics Vibration Test

Coating Facility:
Laser & Sputter Coating Facility

Cleanroom Facility:
ISO class 5 Cleanroom
ISO class 6 Cleanroom
ISO class 8 Cleanroom

Calibration Facility:
Low Energy Plasma Instrument Calibration
Optical Calibration
Thermal Vacuum & Electron calibration

Head of Facilities:

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Name
0208 1234 4567
email@ucl.ac.uk