Beam-position monitors in the X-ray undulator beamline at PETRA.
At the 12 GeV storage ring PETRA, the first synchrotron radiation beamline uses a 4 m-long undulator. The beamline, with a length of 130 m between source and sample, delivers hard X-ray photons usable up to 300 keV. The photon beam has a total power of 7 kW. Combined with the high brilliance, the powerful beam is very critical for all beamline components. Copper, located at a distance of 26 m, hit by the full undulator beam, melts within 20 ms. Different monitors are described for stable, safe and reliable operation of beam and experiments.
Hahn
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U
Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany.
Brefeld
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W
Hesse
M
M
Schneider
J R
JR
Schulte-Schrepping
H
H
Seebach
M
M
Werner
M
M