Gas detectors for x-ray lasers

• DOI: 10.1063/1.2913328
• Publication Date: 2008-05-08T22:44:29Z
• Authors: K. Tiedtke; J. Feldhaus; U. Hahn; U. Jastrow; T. Nunez; T. Tschentscher; S. V. Bobashev; A. A. Sorokin; J. B. Hastings; S. Möller; L. Cibik; A. Gottwald; A. Hoehl; U. Kroth; M. Krumrey; H. Schöppe; G. Ulm; M. Richter
• Keywords: Picosecond; Photon energy; Upgrade

We have developed different types of photodetectors that are based on the photoionization a gas at low target density. The almost transparent devices were optimized and tested for online photon diagnostics current future x-ray free-electron laser facilities shot-to-shot basis with temporal resolution better than 100 ns. Characterization calibration measurements performed in laboratory Physikalisch-Technische Bundesanstalt electron storage ring BESSY II Berlin. As result, measurement uncertainties 10% photon-pulse energy below 20 μm photon-beam position achieved Free-electron LASer Hamburg (FLASH). An upgrade detection hard x-rays was Sub-Picosecond Photon Source Stanford.