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Monitoring the electron beam position at the TESLA test facility free electron laser

Abstract

The operation of a free electron laser working in the Self Amplified Spontaneous Emission mode (SASE FEL) requires the electron trajectory to be aligned with very high precision in overlap with the photon beam. In order to ensure this overlap, one module of the SASE FEL undulator at the TESLA Test Facility (TTF) is equipped with a new type of waveguide beam position monitor (BPM). Four waveguides are arranged symmetrically around the beam pipe, each channel couples through a small slot to the electromagnetic beam field. The induced signal depends on the beam intensity and on the transverse beam position in terms of beam-to-slot distance. With four slot--waveguide combinations a linear position sensitive signal can be achieved, which is independent of the beam intensity. The signals transduced by the slots are transferred by ridged waveguides through an impedance matching stage into a narrowband receiver tuned to 12 GHz. The present thesis describes design, tests, and implementation of this new type of BPM. (orig.)
Authors:
Publication Date:
Jun 14, 2000
Product Type:
Thesis/Dissertation
Report Number:
INIS-DE-0381
Resource Relation:
Other Information: TH: Diss. (Dr.rer.nat.)
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM MONITORING; ELECTRON BEAMS; FREE ELECTRON LASERS; WIGGLER MAGNETS; WAVEGUIDES; BEAM POSITION; BEAM TRANSPORT; MICROWAVE EQUIPMENT; CALIBRATION
OSTI ID:
20988041
Research Organizations:
Humboldt-Universitaet, Berlin (Germany). Mathematisch-Naturwissenschaftliche Fakultaet 1
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
TRN: DE08F2631
Availability:
Commercial reproduction prohibited; INIS; OSTI as DE20988041
Submitting Site:
DEN
Size:
114 pages
Announcement Date:
Apr 04, 2008

Citation Formats

Kamps, T. Monitoring the electron beam position at the TESLA test facility free electron laser. Germany: N. p., 2000. Web.
Kamps, T. Monitoring the electron beam position at the TESLA test facility free electron laser. Germany.
Kamps, T. 2000. "Monitoring the electron beam position at the TESLA test facility free electron laser." Germany.
@misc{etde_20988041,
title = {Monitoring the electron beam position at the TESLA test facility free electron laser}
author = {Kamps, T}
abstractNote = {The operation of a free electron laser working in the Self Amplified Spontaneous Emission mode (SASE FEL) requires the electron trajectory to be aligned with very high precision in overlap with the photon beam. In order to ensure this overlap, one module of the SASE FEL undulator at the TESLA Test Facility (TTF) is equipped with a new type of waveguide beam position monitor (BPM). Four waveguides are arranged symmetrically around the beam pipe, each channel couples through a small slot to the electromagnetic beam field. The induced signal depends on the beam intensity and on the transverse beam position in terms of beam-to-slot distance. With four slot--waveguide combinations a linear position sensitive signal can be achieved, which is independent of the beam intensity. The signals transduced by the slots are transferred by ridged waveguides through an impedance matching stage into a narrowband receiver tuned to 12 GHz. The present thesis describes design, tests, and implementation of this new type of BPM. (orig.)}
place = {Germany}
year = {2000}
month = {Jun}
}