Cryostats – Cryomech AL125/AL200

 The cryostat is a closed cycle refrigerators that can achieve cryogenic temperature down to 25 K. It is very convenient to cool down very large sample or sample holder (see Figure 4). It is also used to cool down samples quickly.

 

Al125 1 Al125 2

Figure 1 – AL125 cold    head with vacuum chamber mounted on the support.

Figure 2 – Detail of the cold head.
Al125 3 Al125 4

Figure 3 – Typical sample cell used with this cryostat. N.B. the cell is fixed to the cold head by a strong magnet.

Figure 4 – AL125 cold head cooling down the high pressure large volume cell N. 1.

Characteristics :

Weight : 20 Kg (vacuum chamber and support included)
  N.B. Very often a counter weight is installed at the sample stage
Cooling time to 80 K : < 15 minutes
Compressor : CP640 compressor system water cooled
Working orientation : angles not bigger than 5°
Entrance windows : 25 Mum kapton foils
Temperature range : 25 K to 277 K
Thermometers : Si diode or Pt100
Vacuum: ~ 1.10-6 bar