Aktuelle Forschungsprojekte

Image Swirl-free on the move...
Image Energy efficiency consulting - cogeneration systems
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Innovative Manufacturing Technologies for Cryosorption Systems
Image Performance tests of refrigerant compressors
Image Lifetime prediction of hermetic compressor systems
Image Laseroptical measurement
Image Investigation of materials
Image Verification of storage suitability of cryo tubes
Image Non- invasive flow measurements
Image Software modules
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Refrigerants, lubricants and mixtures
Image Combined building and system simulation
Image Software for test rigs
Image Software for technical building equipment

You are here:  Home /  Testing Equipment


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

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

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

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 - Testing Equipment