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Optistat_DN

The OptistatDN enables optical spectroscopy experiments that require:

Base temperatures down to 77 K
Quick sample change via top loading, with sample in exchange gas
Hold time greater than 15 hours at 77 K, allowing a full working day's experiments to be run without refilling
Generous f1 radial optical access, with 4 radial windows and 1 axial window
Ability to integrate into commercial spectrometers
A compact and low-cost cryostat 

The OptistatDN cryostat cools samples using liquid nitrogen from an integral nitrogen reservoir. Liquid nitrogen, stored in the upper part of the cryostat, is gravity fed to a heat exchanger surrounding the sample tube. The sample is then cooled by conduction via a helium or nitrogen exchange gas in the sample space. Temperature control is achieved by a combination of manual nitrogen flow control and power dissipated in an electrical heater, regulated using an ITC temperature controller.

Applications:

UV / Visible spectroscopy: Experiments at low temperatures reveal the interaction between the electronic energy levels and vibrational modes in solids.

Infrared spectroscopy : Low temperature IR spectroscopy is used to measure changes in interatomic vibrational modes as well as other phenomena such as the energy gap in a superconductor below its transition temperature.

Raman spectroscopy : Lower temperatures result in narrower lines associated with the observed Raman excitations.

Photoluminescence : At low temperatures, spectral features are sharper and more intense, thereby increasing the amount of information available.

SPM, STM, AFM : Low temperatures decrease the thermal noise from the probes and reduce atomic vibrations.

Gas absorption : We have developed a special cryostat in partnership with Quantachrome Instruments to fit their autosorb-iQ gas sorption analyzers.

Download PDF datasheet – Optistat DN

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