Liquid Helium and Liquid Nitrogen Cooling Stages

To better understandelectronic and electric materials, cryogenic or temperature-dependent studies are monitored using helium and liquid nitrogen stages.

Features:

Stabilization of beam-sensitive materials under high beam currents

Low-temperature phases can be analyzed

Improved spectroscopy and imaging, mainly for cathodoluminescence (CL)

Table No.1: Liquid Helium Cooling Stage

Model #	Basetemp.	Cool down time	Max. operating temp.		Tilt	Rotate	Additional electrical feedthrough option
C1001	-185 °C	10 min	50 °C		45°	±5°	√
C1002	-185 °C	10 min	200 °C		45°	±5°	√
C1003	-185 °C	10 min	400 °C		45°	±5°	√
CF302	6 K	45 min	140 K				√
CF302M	8 K	55 min	140 K			±5°	√

Table 1. Source: Gatan Inc.

Liquid Nitrogen Cooling Stages C1001, C1002, C1003

Nitrogen gas coolsstages to less than −185 °C

Straightforward installation/removal permits the utilization of standard SEM stage

Quick cool down and stable temperatures are ensured by efficient thermal design

Higher upper-temperature options allow more flexibility in experiments

Vibration due to boiling of LN₂ is removed by the external liquid nitrogenheat exchanger

High-precision control through temperature sensor and integral heater

Liquid Helium Cooling Stages CF302, CF302M

CF302M — a helium-cooled stage module — attaches to the SEM goniometer and requires more care than the CF302

Complete replacement SEM stage and door assembly with X, Y, and Z axis manual micrometers

Exclusively engineered vibration and low drift, while reducing the consumption of liquid helium

Depending on the configuration and intended use, an optional radiation shield can be included

Complete system includes top fitting with bladder and valve, flexible transfer tube storage vessel, gas flow pump, gas flow controller, and digital temperature controller

Dual Fuel Option

Works by forcing cold nitrogen gas through the circuit that is similar to the successful C1002 product

Allows operation of liquid helium cold stages with both helium and nitrogen

Accessories — Anti-Contaminators

Anti-contaminatorsC1005, C1006, or C1007 are included as accessories

Table No.2: Liquid Nitrogen Cooling Stage

Model #	Basetemp.	Cool downtime max	Max. operatingtemp.	Heatercontrol individual individual	Individual coolingcircuit
C1005	Less than -185 °C	10 min	50 °C
C1005B	Less than -185 °C	10 min	50 °C		√
C1006	Less than -185 °C	10 min	50 °C		√
C1007	Less than -185 °C	10 min	50 °C	√

Table 2. Source: Gatan Inc.