環境量測服務及改善解決方案

New SC24 cancelling system

SITE SURVEY - Magnetic Fields, Vibrations and Acoustics


Pre-installation

Spicer Consulting offers a site survey service in Europe using the SC11 Analysis System. The standard survey provides data about a proposed site for equipment such as a Scanning Electron Microscope. We measure magnetic fields and floor vibrations in X, Y and Z directions and acoustic levels in units appropriate for direct comparison with the environmental specifications of the equipment to be installed.

The latest high resolution TEMs on the market require low levels of magnetic field and magnetic field gradients along the entire column length. Spicer Consulting is uniquely able to offer surveys measuring ththe field simultaneously to obtain this gradient information for both DC and AC fields.

Trouble-shooting

If you are experiencing interference on existing SEM equipment, we can diagnose the cause and recommend solutions.

Magnetic Field Cancelling Systems


Protecting your Investment in Electron Beam Technology


The SC24

Today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. Fields which exceed the tool manufacturer enviromental specification are common, created by nearby machinery and equipment as well as by external sources. Operation in such fields prevents the tools from reaching their full performance. The Spicer Consulting Field Cancelling systems stabilise the ambient magnetic field to restore the resolution and accuracy of the electron beam tool. Spicer Consulting field cancelling systems are recognised by equipment manufacturers and leading users as the simplest and most effective way to to resolve problems associated with magnetic interference, enabling greater flexibility in the siting of SEMs,TEMs and FIBs and allowing them to perform to their full potential.


The SC22


Typical SEM Installation

The Spicer Consulting Magnetic Field Cancelling Systems comprise a Magnetic Field Control Unit,AC or DC Magnetic Field Sensors and three multicore cables which are installed in the room where the field is to be cancelled.

The Control Unit power amplifiers drive currents through the cables to create a field which is the opposite sign to the changes in the ambient field. The magnetic field sensors measure the resulting field and real time negative feedback reduces the ambient field by the loop gain of the system.

The systems are dynamic, automatically responding to field changes within 100 µs.


Magnetic Field Cancelling

DC cancelling of the field from magnetic stirrers and lifts