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Abstract:
The majority of particles in a beam are located close to
the beam axis, called the beam core. However, particles
in the tail distribution of the transverse beam profile can
never be completely avoided and are commonly referred to
as beam halo.
The light originating from or generated by the particle
beam is often used for non- or least destructive beam profile
measurements. Synchrotron radiation, optical transition,
or diffraction radiation are examples of such measurements.
The huge difference in particle density between the
beam core and its halo, and therefore the huge intensity ratio
of the emitted light is a major challenge in beam halo
monitoring.
In this contribution, results from test measurements using
a flexible core masking technique are presented indicating
way to overcome present limitations. This technique is
well-known in e.g. astronomy, but since particle beams are
not of constant shape in contrast to astronomical objects,
a quickly adjustable mask generation process is required.
The flexible core masking technique presented in this paper
uses a micro mirror array to generate a mask based on
an automated algorithm.
