Chimera - the cooling and heating chamber for powder diffraction
Unlike traditional cooling and heater chambers, the Chimera works by incorporating our single stage GM cooler, meaning that no liquid nitrogen is required.
With a temperature range of 70- 525 K, and excellent stability of 0.1 K, the Chimera is our super reliable variable temperature chamber for flat plate powder samples.
Our team of experts are on hand to advise you on the integration of the Chimera with your powder diffractometer. Get in touch today to arrange a free, no obligation chat.
Features & Tech Specs
The compact design means the Chimera can be easily fitted to a vertical goniometer from the front with a specific adapter plate designed for each type of goniometer.
The key features boasted by the Chimera are:
- Incorporates single stage Oxford Cryosystems GM coldhead, so no consumption of cryogens
- Temperature range of 70- 525 K and excellent stability of 0.1 K
- Ramp rates of 1-360 K/hour for complete temperature control
- Cooldown to 100 K from RT in 35 minutes
- Warm up to 525 K from RT in 40 minutes
Designed with ease of use in mind
A single stage Gifford McMahon (GM) closed cycle cooler made by Oxford Cryosystems is mounted within the body of the Chimera and operates using compressed helium gas provided by the Cryodrive compressor. Note that that there is no helium gas consumption in this system and the helium gas circuit in the Cryodrive/Coldhead combination is sealed. The sample stage is cooled by conduction between the sample stage and the cold stage of the Coldhead. The Chimera sample temperature is measured at the sample stage. Heat leaks within the coldhead are reduced by a radiation shield incorporating Aluminised Kapton windows, and the robust Chimera lid incorporates X-ray transparent windows of carbon fibre. A number of 20mm diameter chromium plated copper sample stages are provided with the Chimera system, however different materials may be available at an additional charge. A vacuum system is used to continuously pump the space around the cryostat to minimise unwanted heat leaks into the system
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Innovative coolers for the global scientific community
Whether cooling samples in capillaries in transmission geometry or flat-plate powder samples in reflection geometry, we have a solution to meet your needs. Our range of coolers now includes systems specifically designed for powder diffraction.