Aktuelle Forschungsprojekte

Image Range of services laboratory analyses
Image Pulse-Tube-Refrigerator with sealed compressor
Image Certifiable connection types in cryogenics
Image Reduction of primary noise sources of fans
Image Software for technical building equipment
Image Calibration of Low Temperature Sensors
Image Corrosion inhibitor for ammonia absorption systems
Image Computational fluid dynamics CFD
Image Helium extraction from natural gas
Image Non- invasive flow measurements
Image Micro fluidic expansion valve
Image 3D - Air flow sensor
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Refrigerants, lubricants and mixtures
Image Combined building and system simulation
Image Innovative small helium liquefier

You are here:   /  Home


Low noise and non metallic liquid-helium cryostat

Industry and Research Institutes

Dr. rer. nat. Andreas Kade

+49-351-4081-5117

Low-noise Magnetic Field Cryostat for SQUID-Applications

Technical Data for the Cryostats

parametervalue
volume of liquid helium5 to 12 litre (other volume possible)
time to complete evaporation of helium3 to 7 days (depends on size)
heat load0.1 W (in standby operation)
rate of helium evaporation≤ 3 litre / day
holding time of the liquid heliumup to 4 days without refilling
initial noise of the cryostat< 3 fT / Hz½
helium leak test (He-vessel)< 1 × 10-11 mbar l / s

ILK Dresden developed low noise magnetic field and non metallic helium cryostats made of GRP (glass reinforced plastics) with a high helium and vacuum holding time.

The cryostats can operate in a direction independent operation mode (tiltable arrangement) and hence they are suitable for a plurality of several applications.

The ILK concept offers much lower permeation rates inside the He-reservoir as comparable models from other manufacturers and is therefore perfect for SQUID (superconducting quantum interference device) applications and other long-term measurements.
 
The technical design of the cryostats is thus predestined for future sensor generation.

Specification

  • suitable for the cooling of SQUID-Sensors
  • non-metallic (GRP)
  • fast filling with LHe via thermosiphon
  • GRP exhaust gas cooled radiation shield for high efficiency.
  • small cold-warm distance feasible
  • low maintenance 
  • other design variants possible on costumer request

Low noise magnetic field

The low-noise magnetic field of the cryostat was tested in the magnetically shielded room BMSR-1 of PTB Berlin and is smaller than the lowest resolution limit of the measurement system used, see figure below.


Your Request

Further Projects

Image

Brine (water)-water heat pump

Test according DIN EN 14511 and 14825

Image

High temperature heat pump

Using waste heat from industrial processes

Image

Air-water heat pumps

Test according DIN EN 14511 and 14825

Image

Micro heat exchangers in refrigeration

3D-printing of micro heat exchangers

Image

Electrochemical decontamination of electrically conducting surfaces „EDeKo II“

Improvement of sanitary prevention by electrochemical decontamination