title: Measurements of harmonic wake fields excited by rough surfaces.
abstract: An experiment has been carried out at the TESLA Test Facility linac to investigate the wake fields generated by picosecond electron bunches in narrow beam pipes with an artificially roughened inner surface. The energy structure imposed on the bunches by the wake fields has been analyzed with a magnetic spectrometer. Strong harmonic-wake-field effects are observed as expected from simulations in which the rough surface is modeled by a dielectric layer.
authors.affiliation: RWTH Aachen-Physikzentrum, Physikalisches Institut IIIa, Sommerfeldstrasse 26-28, D-52056 Aachen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Hüning
authors.forename: H
authors.initials: H
authors.lastname: Schlarb
authors.forename: P
authors.initials: P
authors.lastname: Schmüser
authors.forename: M
authors.initials: M
authors.lastname: Timm