Cryogenic
Preparation System
EMS 1250 Cryogenic Preparation System
The EMS 1250 Cryogenic Specimen Preparation System is fully integrated, having all the facilities for L.T.S.E.M. This includes the Preparation Unit with its control instrumentation, together with the Low Temperature Stage adaption to the existing SEM stage, together with actively pumped vacuum transfer system.
The preparation Unit has a freezing chamber and preparation chamber. The freezing chamber can be used to produce sub-cooled (slushy) liquid nitrogen. The frozen specimen can be transferred to the Preparation Chamber, and subsequently the SEM, using a Transfer Unit which maintains Cryogenic Protection.
The Preparation Chamber has facilities for fracturing the specimen, which can be coated with gold or carbon, without the need to change heads. The dual carbon head also has facilities for surface etching using a radiant source, or metal evaporation. The system has two controlled heaters, both accurately temperature controlled, and with timing facilities. One heater is located in the Preparation Chamber, the other heater is located in the SEM Coldstage. This allows the temperature to be raised to allow controlled ‘bulk’ etching of the specimen. The Preparation Chamber and SEM stage are maintained below - 160°C, which allows a good margin to -130°C, the point for ice recrystallization.
It is important to avoid contamination of the frozen specimen, and the system has protective shielding. However, more significantly, the system has a clean, contamination-free vacuum by using a hydrocarbon-free Turbo Molecular pumping system backed by a two-stage rotary vacuum pump. The system’s unique cylindrical design of Preparation Chamber ensures high efficiency of the turbo unit, together with ease of use of all the chamber facilities.
Features
- Independent preparation system.
- Turbomolecular pumping system contamination and hydrocarbon free.
- Transfer unit (actively evacuated) with gate valve.
- ‘Slushing’ chamber for Liquid Nitrogen.
- Cylindrical preparation chamber for efficient operation with gate valve.
- Low voltage ‘cool’ sputtering head with high repeatability (Gold as standard).
- Cooled probe facility.
- Cooled knife facility.
- Carbon fiber ‘flash’ evaporation with radiant heater head with variable control and evaporation pulse button.
- Liquid Nitrogen dewar for preparation chamber with long term stability.
- Liquid Nitrogen dewar for SEM with long term stability.
- Temperature and timed preparation chamber sublimation stage.
- SEM cooled stage with temperature and timed sublimation heater.
- SEM gate valve to facilitate efficient transfer.
- Modular electronics, full push button and automatic control of pumping and valving sequence.
- Clean line design.
- Polycarbonate safety shield.
Specifications (Preparation Unit)
|
Specifications (Control Unit)
| Instrument Case | 450mm (W) x 350mm (D) x 175mm (H) |
| Fitted with: | Control Electronics |
| Weight | 28Kg |
Specifications (Tranfer Unit with)
| Vacuum Gate Valve | (Vacuum Pumped) |
| SEM Coldstage | With Vacuum Gate Valve and Liquid Nitrogen Dewar 1 Litre Capacity |
| Weight | 16Kg |
| Total weight of system | 82Kg |
| Sputter Coating | 22mm (Dia.) x 0.1mm (T) Target (Gold fitted as standard) |
| Timer | 0-4 mins |
| Sputter Gauge | 0-50mA |
| Carbon Coating (With Integral Radiant Heater) |
*Deposition 0-10nm/Min Carbon String/Carbon Cord |
| Ammeter Gauge | 0-50 Amps |
| Evaporate Button Outgas Control | 0-25 Amps |
| Cooled Knife Assembly | |
| Cooled Probe Assembly | |
| Specimen Transfer Stub for Multipurpose Application | (Special Stubs Available) |
| Vacuum Gauge | 1 x 10-2 mbar |
| High Vacuum Condition Indicator | |
| Turbo Molecular Pump Unit | Better than 1 x 10-5 mbar |
| Preparation Stage Temperature | Better than -160ºC |
| Temperature Monitor and Control | -200ºC to 0ºC |
| Timer | 0-20 minutes |
| Viewing Light Source Supply | 115V 60Hz (6 Amp Max) 230V 50Hz (3 Amp Max) |
Services
| Argon (for Sputtering) | Nominal 4 psi |
| Nitrogen (for Sputtering) | Nominal 4 psi (Argon can be used if only one gas is required) |
| Vacuum Pump (Recommended) | Complete with vacuum hose and oil mist
filter 135L/Min |
| Size | 470mm (L) x 150mm (W) x 250mm (H) |
| Weight | 23Kg |
Ordering Information
| 92000 | EMS 1250 Preparation System complete with interface to SEM (Specify Microscope Stage to Suit) | POR | Request Quote |
| 91025 | RV8 Rotary Vacuum Pump | $2,808.00 | Add to Cart |
| 92010 | Binocular Microscope | POR | Request Quote |
| 92001 | Trolley | POR | Request Quote |
Replacement Sources
| 91045 | Carbon String 1 Meter | $25.00 | Add to Cart |
| 91046 | Carbon Cord 1 Meter | $28.00 | Add to Cart |
Replacement Targets
| 92020 | Gold Target | POR | Request Quote |
| 92021 | Gold/Palladium Target | POR | Request Quote |
Replacement Accessories
| 92022 | Specimen Stub | POR | Request Quote |
| 92023 | Fracture Rivets 10/pack | $25.00 | Add to Cart |
| 72592 | TFM Freezing Medium 100 ml (OCT-Compound) | $19.50 | Add to Cart |
Ask about our Installation and Training Program.
Cryogenic Specimen Preparation Principles
