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SC22
Today’s high performance electron beamtools are very sensitive to changing ambient magnetic fields. The fields movethe beam causing loss of resolution and measurement accuracy. The SC22 systemreduces the ambient AC field and restores the resolution and accuracy.
The SC22 system comprises a Magnetic FieldControl Unit, an AC Magnetic Field Sensor and three orthogonal multicorecables, which are installed in the room where the field is to be cancelled. TheSC22 can drive single loop and double loop room size cables. It also works withHelmholtz cables that are attached to a frame around the column. Each poweramplifier in the control unit drives a current through its cable to create afield of the opposite sign to the change in ambient field. The magnetic fieldsensor measures the resulting field and real time negative feedback reduces theambient field by the loop gain of the system. The system is dynamic,automatically responding to field changes within 100 µs. AC Line fields (50/60Hz) are reduced by 50 x.
The SC22 does not cancel DC field changesfrom sources such as elevators, trains and traffic. The larger SC24 system isavailable to cancel both AC and DCfields.
SC22 Features
- Protects your investment in electron beam technology by stabilising the magnetic field environment
- Cancels and monitors the AC field
- Low cost, high performance system
- Intelligent user interface
- Automated set up
- Cancels AC fields from 10 Hz to 5 kHz
- 50 x field improvement at 60Hz
- Full 3 axis (X, Y, Z) system
- Up to 60 mG (6.0 µT) pk-pk range
- Adapts to field changes within 100 µs
- Supports dual sensors for TEMs and high gradient fields
- USB monitoring port
SC22 Product Guides (pdf)
Brochure for the full SC22 system
Monitor software option for Windows PC
AC magnetic field sensor
Column sensor mount option for AC sensor
Sensor mount option for SEM
Sensor mount option for TEM
Single loop room cable option for SEM
Double loop room cable option for TEM
Frame-mounted Helmholtz cable option for SEM
Rectangular frame option for SEM