BEAM INSTRUMENTATION AND DIAGNOSTICS
THz radiation electron beam diagnostics
THz radiation generated by short electron bunches contains
an imprint of the electron bunches in its pulse structure.
THz radiation could become a useful diagnostic to experimentally
study the performance of the Jefferson Lab IR Upgrade.
Additional work would involve the use of this interesting
wavelength regime for imaging studies of materials and biological
systems.
Beam halo monitors for high-current linacs
In multi-GeV electron accelerators losses of the order of
100 nA can be excessive due to activation of components,
reduction of lifetime of electronics, heating of flanges
with possibility of leaks, etc. With energy-recovering
linacs operating with currents higher that 100 mA this
would imply monitoring and control of beam halo at least
6 orders of magnitude lower than the full current.
At present, no non-invasive technique exists that allows
the measurement of beam halo with such a dynamic range.
Beam diagnostics for high-average current electron beams
Future colliders and linac-based free electron lasers
will require small, low-emittance, high-charge electron
bunches. Non-invasive tools to measure the properties
of such beams do not exist, at present, and need to
be developed. Ideally these tools would allow full
6-dimensional characterization of the electron bunches.
Helicity correlated beam properties measurements
Experiments using polarized electron beams often require
alternating the helicity of the beam while maintaining
all its other properties constant (emittance, position,
current, etc) to a high degree. Highly accurate tools
to measure the constancy of these parameters are needed for these sensitive experiments.