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Accelerator Optics

Electron accelerators use magnets to direct and focus the electron beam (e-beam) through the accelerator.  Electromagnets (EMs) are commonly used for these e-beam optics.  However, there are applications where EMs are not suitable.  Examples are compact bends and chicanes where there is not enough space available for the EM optics due to the room needed to accommodate their coils.

STI has patented designs for compact accelerator optics (e.g., dipoles, quadrupoles, sextupoles), which are based upon permanent magnets (PM).  An important capability is their magnetic fields are adjustable.  Motors attached to the PM optics can remotely tune the field.  Manual adjustment is also available.  Another noteworthy feature is the ability to easily adjust the magnetic centerline position independent of the field strength.  Centerline adjustment is typically difficult to do with EM optics once they are locked into position.

Our PM optics eliminate the need for high-current power supplies and cooling water, and are inherently shorter in length than EMs at the same field strengths (see PM-based optics reprint).  We delivered the triplet shown in the upper-right to the Radiological Research Accelerator Facility (RARAF) at Columbia University.  Examples of other PM-based devices can be found in our Magnetic Devices Brochures.  We would be happy to provide a quote for the most cost-effective PM optic to satisfy your needs.

For more information contact Stephen C. Gottschalk (see Contacting Us).

PM tripletCompact bend

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