Joule-Thomson Cryostats (JT)

The Entropy cryostat with Joule-Thomson stage offers continuous operation at temperatures around 1K and a cooling power of a few Milliwatt.

Entropy JT cryostats are available as M- and L-series based on pulse-tube coolers with a cooling power of 0.5W or 1.0W at 4.2K and various sample space.

JT stage with turbo pump:

  • Base temperature: < 0.9K
  • Cooling power: a few mW at 1.0K

JT stage with fore pump only:

  • Base temperature: < 1.2K
  • Cooling power: a few mW at 1.3K

Sample space at 4K:

  • Ø 230 x 300mm (M-series)
  • Ø 300 x 300mm (L-series)
  • Or completely custom-made
Hauptflansch JT M-Serie 64xSMA   0167_Entropy_05_Ausschnitt 400x331dpi

Application example:

Cryostat for operating 64 Superconducting Single Photon Detectors (SSPDs) below 1K.

JT M-Serie offen   0167_Entropy_01 315x790dpi

The systems come fully featured up with temperature sensors, heaters, electronics and software with TCP/IP interface for remote control.

Several accessories such as DC cables, coax cables, circuit boards, fibers, optical ports and sample magnets are available on request.