The Cryogen-free Measurement System. CryoAdvance, Inc.

Function

The optCRYO108cont is a compact continuous flow optical cryostat. A cooling agent (liquid helium or liquid nitrogen) is transferred from a storage dewar through a vacuum isolated tube to the heat exchanger. The sample is mounted directly on the heat exchanger. The heat exchanger with the sample is positioned in a pumped out chamber. The sample temperature is controlled by a temperature regulation block. This block forms a continuous flow of cooling agent from the dewar and controls the temperature of the heat exchanger.

The design of the cryostat enables the high magnification objectives for microscopy studies as well as the reflectivity measurements at high incidence angles. The sample position can be changed to meet optimal conditions for reflectivity measurements and microscopy. Modifications for transmission and reflection measurements are available. Spectroscopy cryostats can be equipped with IR, visible and UV windows.

Modification

optCRYO108cont

optCRYO108contN2

Cooling agent

He

N2

Maximal sample dimensions, mm

Ø15 x 1

Ø15 x 1

Windows diameter, mm

20

20

Window material

Quartz

Quartz

Clear diameter for transmission, mm

10

10

Angle of acceptance for reflectivity measurements, degrees

100

110

Cryostat height, mm

350

350

Cryostat diameter, mm

80

80

Length of cooling agent transfer tubes, mm

250

250

Temperature range, K

4 - 300

78 - 300

Temperature stability in the interval 4 - 300 K, K*

±0.1

Temperature stability in the interval 80 - 300 K, K

±0.1

Cool down time (to 4.2 K or to 80 K), min

15

15

Sample change time, min

20

20

He consumption at 4.2 K, L/h

1

N2 consumption at 80 K, L/h

1.1

He dewar (recommended), L

40

N2 dewar (recommended), L

35

Cryostat weight, kg

4

4