The Cryogen-free Measurement System. CryoAdvance, Inc.

The xrayCRYO105 enables all kinds of X-ray measurements. The xrayCRYO105 is universal helium/nitrogen cryostat for X-ray studies in temperature region 1.8 - 300 K. The cryostat is designed to work with common goniometer heads. Using our inserts you can apply mechanical stress or electric field to the sample during a low temperature experiment. The xrayCRYO105 is a combi cryostat which uses advantages of bath and continuous flow cryostats. Cooling agent is placed in a storage reservoir inside of the cryostat body and is flowing into the sample room through the capillary to cool the sample. The low cryogen consumption (typically < 0.1 L/h) enables long operation time more than 20 hours. The temperature control is based both on the heat exchanger temperature and helium or nitrogen gas flow rate regulation. The helium xrayCRYO105 can be used as a nitrogen cryostat when the helium reservoir is filled by liquid nitrogen. Modification xrayCRYO105N2 is the nitrogen cryostat only.

All cryostats of the xrayCRYO105 family use temperature regulation system with tSTAT320 controllers.

Function

The cryostat has the liquid nitrogen and helium reservoirs. The nitrogen bath cools the outer radiation screen. Liquid cooling agent flows through the capillary into the sample room and evaporates on the heat exchanger. The helium (nitrogen) gas temperature is regulated by the electric power of the heat exchanger. The probe is placed in a gas flow directed upwards. The flow rate of the cryogen gas is electronically regulated by differential pressure regulator outside of the cryostat. The combined gas flow and heat exchanger temperature regulation results in high temperature stability of the sample and in a low cryogen consumption. The temperatures below 4.2 K to 1.8 K can be reached by helium gas pumping. Samples are top loading by the use of sample holders.

Modification

xrayCRYO105-40

xrayCRYO105-50

Sample space, mm

40

50

He-reservoir, L

2.2

3.5

N-reservoir, L

2,5

4

Windows height above the cryostat bottom, mm

65

70

Sample-to-windows aperture, degrees

horizontal

360

360

vertical

50

80

Windows

Beryllium cylinder

Beryllium cylinder

Length of cryostat tail, mm

140

140

Diameter of the cryostat tail, mm

65

65

Temperature range, K

1.8 - 300

1.8 - 300

Temperature stability in the interval 4 - 50 K, K*

±0.05

±0.05

Temperature stability in the interval 50 - 300 K, K

±0.1

±0.1

Cool down time (to 4.2 K), min

30

30

Sample change time, min

5

5

He consumption at 4.2 K, L/h

0.1

0.12

He volume to cool the cryostat down to 4.2 K, L

1.2

1.4

Cryostat weight, kg

10

12

Complete system

1. xrayCRYO105 cryostat.

2. Temperature controller tSTAT320 with Manostat.

3. Vacuum isolated transfer tube.

4. Sample holder.

Optionally

1. Optimization of windows configuration for X-ray experiments.

2. Windows material

• Beryllium.

• Mylar.

• Other materials on request.

3. Additional optical windows above the beryllium windows: maximal aperture of an optical window is 32°. Clear diameter of an optical window up to 20 mm.

4. Height of windows above the cryostat bottom from 65 to 400 mm.

5. Elliptical cryostat tail for experiments in magnetic field. Minimal distance between magnet poles is 40mm.

Additional equipment

1. Sample holder

• Goniometer head on the sample holder.

• X, Y, Z adjustment unit of samples ±15mm.

• Sample rotation by 360° around vertical axis.

• Up to 200 kg mechanical stress applied at helium temperatures.

2. XYZ cryostat support adjustable to the X-Ray apparatus.

3. He-transfer tube

• Variable length connection.

• Flexible connection.

4. Tubes connections.

5. Sample rod with a universal flange.

6. Measuring heads for sample holder.

7. 10-pin electrical connections on the sample holder.

8. Storage He or N2 dewar.

9. Dewar transport platform.

Key benefits

• Mechanical stress application.

• Goniometer head inside of the cryostat.

• Optical access to the sample.