|
The development of future free electron lasers (FEL) and linear colliders requires high brightness electron beams with bunch lengths on the order of 100-fsec. Reliable measurement of such a short bunch is not a trivial problem. Furthermore, x-ray FELs will require the ability to observe variable electron beam characteristics, such as emittance and peak current, within the length of the bunch. A simple way to measure bunch length and possibly unfold beam quality variations over the bunch length is to ''streak'' the bunch using a transverse RF deflecting structure at its zero-crossing phase. Several S-band deflecting structures were constructed and tested at SLAC in the 1960's. One of these 2.4-m long structures has been installed in the SLAC linac for beam testing. We report on bunch length measurements performed using this structure and comment on future methods and applications.
|
