The Cryogen-free Measurement System. CryoAdvance, Inc.

Function

The optCRYO198 is universal nitrogen (helium) continuous flow cryostat with an external reservoir and with a temperature control system. Liquid nitrogen or helium is transferred from a storage dewar to a gas-generator which forms the cold vapor flow. The temperature controller stabilizes the flow rate and gas temperature.

The system is compact and easy to use for any optical experiments. The cryostat has two perpendicular optical channels with different spectral bands. In order to change the spectral band of measurement the cryostat has to be rotated by 90 degree.

1. Universal nitrogen cryostat

Number of windows

4

Angle between channel axes, degrees

1-2

90

2-3

90

3-4

90

Window material:

2 quartz windows
2 ZnSe windows

Window-to-window distance, mm

70

Diameter of the quartz window for laser excitation

standard

Aperture of every channel, degrees

45 (ZnSe)

Windows clear diameter, mm

20

Square cross-section of the cryostat, mm

60 x 60

Distance between windows optical axis and the cryostat bottom, mm

75

Windows height above the cryostat bottom, mm

75

Sample space, mm

45

Operational temperature range of the nitrogen cryostat, K

85 - 350

Operational temperature range of the helium cryostat, K

8 - 350

Temperature regulation accuracy, K

0.1

Cryostat height, mm

200

2. Double temperature controller system

2A. Manostat with electrical valve of evaporative helium flow control

2B. Temperature controller tSTAT335

Thermosensitive element graduation

RS-232 interface

Software for Windows™ OS

Connecting cables

3. The cryostat insert

Optional:

A) Perpendicular to the optical axis flat shift
B) 14-pin vacuum connector with cables

4. Nitrogen (helium) transfer line with flexible lateral bending

Bending 1: 1.2 m
Bending 2: 1.2 m

5. Adapter holder for transfer line

Dewar throat, 58 mm*