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Alto 2100
The ALTO 2100 is a complementary model to our world renowned ALTO 2500 with its high resolution cryo results on Field Emission SEMs. Both systems are quick and easy to use - from initial rapid freezing to final imaging of the cryo-prepared sample takes just a few minutes.
The ALTO 2100 system uses a high-stability SEM cold stage with a cooling circuit that is independent of the SEM vacuum and therefore compatible with low vacuum and environmental modes of operation. A completely new cryo-preparation chamber, with a large integral nitrogen dewar, gives all-day hold time, cold fracturing and excellent cryo-pumping of water vapour.
Specification of Alto 2100
Nitrogen cold stage (-185°C to +100°C) and interface to SEM stage
Anticontaminator and lamp assembly
Nitrogen 'heat exchange' dewar and gas feedthroughs to SEM chamber
Ball valve incorporating microswitches plus mechanical interlock and interface to SEM chamber
High vacuum cryo preparation chamber, with integral nitrogen dewar, sample platform
Cold knife fracturing device
Sputter coating source (supplied with Au target)
Airlock gate valve with interface for vacuum transfer device
Keypad control unit for vacuum, coating and temperature control, also system logic status
Vacuum transfer device
'2-pot' freezing station for producing nitrogen slush and loading pre-frozen samples
Multi-functional two stage rotary pump, with exhaust filter, flexible pumping lines, foreline trap
Power electronics and solenoid valves, mounted in floor standing cabinet
Specimen holder including a range of stubs and rivets
Options
Binocular viewer, x10 and x20 magnification
Additional specimen holders
Self pressurising N2 dewar with gas flow regulator
for cooling SEM cold stage and gas purging
Rotary knife with micrometer control
