The width of the ribbon ion beam increases through most of the beamline.

The width of the fan- shaped beam is substantially similar to the width of the detector.

A variable beamwidth stage light having an axially movable reflector (18) for changes in beamwidth.

The coils are positioned above and below the beam, respectively, and extend along a width of the beam.

The projection system comprises a beam expander for expanding the width of the beam, and a focussing device for focussing the projected beam.

This beamwidth (A) is a measure of the width of the illumination pattern.

The two beams are scanned (24, 22) in synchronism in the direction of the narrow dimension of the line beam to create a narrow heating pulse from the line beam when activated by the larger beam.

In particular, the width of the illumination beam is narrowed such that the size of the projected illumination beam is smaller than the field of view of the microscope.

An adjustable collimator varies the width of the imaging beam in the scan direction.

The time taken for the beam to move between two points during the scan can also be measured from the sampled beam stop current.

The resulting stitch should be quick small and perfectly vertical.

The resulting stitch should be quite small and perfectly vertical.

At the point of focus an optical element exchanges the converging and collimated angles of the beam over a period approximately less than or equal to the width of the focused beam.

In another embodiment, the dimension is at least one of a length or width of the bundle.

A source, such as an x-ray tube, generates a fan beam of radiation effectively emanating from a source axis, with the width of the fan beam collimated by a width collimator, such as a clamshell collimator.