SC22 Magnetic Field Cancelling System0 pages

SPICER CONSULTING

SYSTEM SC22

SC22 Magnetic Field Cancelling System

Cancels and monitors the AC field

Low cost, high performance system

Intelligent user interface

Automated set up

Cancels AC fields from 2.5 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

Overview
Today’s high performance electron beam tools
are very sensitive to changing ambient magnetic
fields. The fields move the beam causing loss of
resolution and measurement accuracy. The SC22
system reduces the ambient AC field and restores
the resolution and accuracy.
The SC22 system comprises a Magnetic Field
Control Unit, an AC Magnetic Field Sensor and
three multicore cables, which are installed in the
room where the field is to be cancelled.
Each power amplifier in the control unit drives a
current through its cable to create a field of the
opposite sign to the change in ambient field. The
magnetic field sensor measures the resulting
field and real time negative feedback reduces the
ambient field by the loop gain of the system.
The system is dynamic, automatically
responding to field changes within 100 µs. AC
Line fields (50/60 Hz) are reduced by 50 x.
The SC22 does not cancel DC field changes
from sources such as elevators, trains and traffic.
The larger SC20 system is available to cancel
both AC and DC fields.

Protects your investment in electron
beam technology by stabilising the
magnetic field environment

USB monitoring port

SPICER CONSULTING, Eden Laboratory, Broadmead Road, Stewartby, Bedfordshire, England MK43 9ND
Tel: +44 1234 765773 Fax: +44 1234 765778 E-mail: enq@spicerconsulting.com Web: www.spicerconsulting.com
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11-Mar-2015