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Microstat HiResII

A liquid helium cooled, vacuum loading continuous flow (CF) optical cryostat with extremely low sample vibration and sample drift at both constant and changing temperatures.

Extremely low sample vibration and drift to maintain high resolution measurements over many hours
2.7 - 500 K temperature range
Very short working distance - only 2.2 mm
Compact, light weight system - only 1.5 kg, and less than 49 mm deep
Operation in any orientation
Choice of reflectance (one window) or transmission (two windows) configuration

The MicrostatHiRes2 optical cryostat works on a continuous flow principle using an oil-free pump to draw liquid helium from a storage vessel along a transfer tube to the heat exchanger ("pull mode"). Temperature control is achieved by a combination of automatic or manual helium flow control and power dissipated in an electrical heater, regulated using a temperature controller. The cryostat can also be used in "push mode", in that case the flow of liquid helium is generated by pressurising the storage dewar. The advantage is that the need for a gas flow pump is removed, eliminating the vibration and noise generated by the pump and reducing system cost.

Applications:

Micro-Raman and micro-photoluminescence (µPL) mapping of semiconductor microstructures with sub-micron spatial resolution
µPL quantum dot (QD) measurements - even down to single-photon counting

Download PDF datasheet – Microstat HiResII

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