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.