TescanTechnology Accessories Peltier cooling and heating stage

Peltier cooling and heating stage

The Peltier stage allows for lowering the temperature of the sample by placing it on a temperature-controllable stage.

The temperature of the stage is manipulated by creating a gradient of temperature between two dielectric plates which are separated by a semiconductor. A voltage is applied between the two electrodes connected to the semiconductor and a gradient in temperature is created. This phenomenon is known as the Peltier effect. The gradient can be reversed by switching the direction of the current. This method is excellent for small-scale heat extracting/transferring (cooling/heating) from a sample. The Peltier stage helps to preserve the delicate structure of the sample by controlling water evaporation. For example, when the chamber pressure is set to 100 Pa, the temperature of the sample needs to be lower than -20 ̊C in order to prevent water evaporation. The Peltier stage can be combined with the Water Vapor Inlet for the imaging of wet samples in low vacuum conditions. The Peltier stage is also suitable for high vacuum operations. The stage can cool a sample down to -50 ̊C at a rate of 30 ̊C per minute.

The Peltier cooling and heating stage can be installed in any TESCAN SEM or FIB-SEM system (except VEGA SB/SB Easy Probe).

Key specs:

Temperature range: -50°C to +70°C
Temperature accuracy: ± 0.5°C
Temperature stability: ± 0.2°C
Maximum cooling speed: 30 °C per minute
Regulation of the cooling/heating process: automatic, set by the microscope software

Cooling of the Peltier module: closed loop cooling system (filled with proprietary coolant)
Diameter of the specimen holder: 12.5 mm
Power Input of Peltier cell: 50 W