Germany - Laboratory equipment, optical instruments and precision equipment (except glasses)

Description

Two systems shall be rack-based cryogenic cryostats. Such a system will be called "rack-based cryostat" in the following. The third cryostat is also a cryogenic cryostat, but with extended technical requirements regarding vibrations and with free-beam optics. In the following, this cryostat will be called "Spectroscopy cryostat with free-beam access".The rack-based cryostats should in particular be compact in dimensions and easy to move around in the laboratory in order to enable different types of measurements and experiments. In addition, the cryostat must not be damaged by moving it in the laboratory, especially by mechanical shocks.The spectroscopy cryostat with free-jet access is used for special measurements, so it does not have to be easily movable in the laboratory. This cryostat is supplied including optical table for measurement.
Performance specification for three cryogenic cryostats to be installed at the Walter Schottky Institute (TU Munich) at the Chair of Semiconductor Nanostructures and Quantum Systems (Prof. J. J. Finley).1. General system requirements1.1.Design of the systemsTwo systems are to be rack-based cryogenic cryostats. One such system will be referred to as the "rack-based cryostat" below. The third cryostat is also a cryogenic cryostat, but with extended technical requirements regarding vibrations and with free-jet optics. In the following, this cryostat will be called "Spectroscopy cryostat with free-beam access".The rack-based cryostats should in particular be compact in dimensions and easy to move around in the laboratory in order to enable different types of measurements and experiments. In addition, the cryostat must not be damaged by moving it in the laboratory, especially by mechanical shocks.The spectroscopy cryostat with free-jet access is used for special measurements, so it does not have to be easily movable in the laboratory. This cryostat is supplied including optical stage for measurement.1.2.Performance Specifications1.2.1 Performance Specifications (Rack-based Cryostats)The cryostat must meet the following specifications:- Base temperature <3.0 K- Sample compartment >49mm (diameter)- Temperature sensor and readout electronics to measure base temperature integrated in the system- Cryostat and compressor mountable in rack (19 inch, industry standard)- Compressor height 30 cm maximum, overall height maximum- Moveable in space, long-term mechanical stability against shock (>= 5 yearsat average use)- Air-cooled (no need for cooling water)- Closed-loop cooling systemPhysical size of the system: A rack-based cryostat shall not exceed the following overall size:- Width: rack-based (19 in.), external dimensions max. 50 cm- Depth: max. 80 cm- Height: max. 50 cm (compressor and cryostat)Required infrastructure: The following infrastructure must be sufficient for operation:- Electrical power < 2 kW (220 V, 50 Hz, "standard socket") / cooling of the room by a standard air-conditioning system must be possible- Cooling water: explicitly excluded- Room height: 250 cmControl via PCAll electronically controlled functions (especially temperature and error messages) must be readable and controllable via PC (Ethernet).1.2.2 Performance Specifications (Spectroscopy Cryostat with Free Beam Access)The cryostat must meet the following specifications:- Base temperature < 4K- Time to cool a sample to 5K < 6h- Fully automatic temperature control- Sample chamber > 70mm (diameter)- Length of connection between cryostat and compressor > 12m- Closed cooling circuit- Vibration on cold plate <5nm in a bandwidth of at least 1.2kHz peak-to-peak- Compatible with existing setup with vacuum hoods for optical measurements with143mm inner diameterThe hood must meet the following specifications:- 5 vacuum windows (4 side and 1 top) o Top window:▪ transmission > 80% for wavelengths between 900-4000nm o 2 opposite side windows each:▪ transmission > 80% for wavelengths between 900-4000nm▪ transmission > 80% in the visible spectral range- Minimum working distance for perpendicular excitation and detectiono Top: < 13 mm o Side: < 18 mmThe optical stage must meet the following specifications:- Width: approx. 1500mm- Length: approx. 2700mm- Integration of the cryostat in or on the optical table possibleo Installation height up to a maximum of 120cmThe following infrastructure must be sufficient for operation:- Electrical power < 3.5kW- Cooling water: less than 4 liters per minute- Room height: 300cmControl via PCAll electronically controlled functions must be readable and controllable via PC.2Delivery,Acceptance Test,Testing2.1 Date of DeliveryThe cryostats must be delivered within 8 months after receipt of order and within another month the acceptance test at Walter Schottky Institute must be passed for all three systems. The total price must include the cost of delivery to the Walter Schottky Institute. Furthermore, at least two employees of the Walter Schottky Institute must be trained in the use of the system.2.2 WarrantyThe cryostats must each have a warranty period of 12 months from the date of passing the customer's acceptance test.2.3 Acceptance TestAfter installation at the Walter Schottky Institute, the system must be tested by a technician from the vendor accompanied by a member of the faculty. This must meet or exceed all specifications listed above.

Opportunity closing date

06 November 2022

Value of contract

£100k-1m