Focusing of a relativistic electron beam with a microfabricated quadrupole magnet

The application of microfabrication techniques to beam physics responds to a need in the particle accelerator community for miniature, economical components that can be used in a range of diverse applications. In this work, we show the first reported results of relativistic (3.2 MeV kinetic energy) electron beam focusing using a microfabricated Panofsky-like quadrupole. The measurements revealed a spurious vertical steering dipole field which was corrected by asymmetrically exciting the currents in the device. The differences between experimental data and expected results are investigated with the help of RADIA simulations.