Aktuelle Forschungsprojekte

Image Energy efficiency consulting - cogeneration systems
Image Low Temperature Measuring Service
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Software for technical building equipment
Image Micro heat exchangers in refrigeration
Image Swirl-free on the move...
Image High temperature heat pump
Image Low noise and non metallic liquid-helium cryostat
Image Micro fluidic expansion valve
Image Ice Slurry Generation
Image Hydrogen and methane testing field at the ILK
Image Performance tests of condensing units
Image Testzentrum PLWP at ILK Dresden
Image Humidifier System for High-Purity Gases
Image Innovative small helium liquefier
Image 3D - Air flow sensor

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

Image

Cryostats, Non-Metallic and Metallic

position indenpendent, highest endurance, tiltable for liquid helium and liquid nitrogen

Image

Ice Slurry Generation

Using Direct Evaporation

Image

Pulse-Tube-Refrigerator with sealed compressor

for mobil use in the hydrogen technology

Image

3D - Air flow sensor

Anemometer for determination of 3d-air flow