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Harwell, United Kingdom

Diamond and Steven Winter Associates, Inc. | Date: 2002-03-11


Diamond | Date: 1997-07-07

paper goods, namely, - posters, stationary paper, writing paper art paper, note paper, craft paper, shelf paper, bumper stickers, mounted and unmounted photographs, rubber stamps, playing cards, printed instructional and teaching material in the field of domestic and international politics; brochures, newsletters, magazines and books in the field of domestic and international political issues. clothing, namely, T-shirts, shirts, sweat shirts, pants, shorts, shoes, hats, coats, boots, and slippers.

Thomas C.,Diamond | Rehm G.,Diamond | Bartolini R.,Diamond | Delerue N.,University of Oxford | Bajlekov S.,University of Oxford
IPAC 2010 - 1st International Particle Accelerator Conference | Year: 2010

Single shot emittance measurement is essential to assess the performance of new generation light sources such as linac based X-ray FELs or laser plasma wakefield accelerators. To this end, we have developed a single shot transverse emittance measurement using at least 4 screens inserted in the beam at the same time, measuring the beam size at different positions in a drift space in one shot. We present here test measurements performed at Diamond in the transfer line from the Booster to the Storage Ring, using thin OTR screens. Additionally, we compare these measurements with results from the more conventional quadrupole scan method. The validity and limits of the new method are also discussed. Source

Wunderer C.B.,German Electron Synchrotron | Allahgholi A.,German Electron Synchrotron | Bayer M.,German Electron Synchrotron | Bianco L.,German Electron Synchrotron | And 51 more authors.
Journal of Synchrotron Radiation | Year: 2016

With the increased brilliance of state-of-the-art synchrotron radiation sources and the advent of free-electron lasers (FELs) enabling revolutionary science with EUV to X-ray photons comes an urgent need for suitable photon imaging detectors. Requirements include high frame rates, very large dynamic range, single-photon sensitivity with low probability of false positives and (multi)-megapixels. At DESY, one ongoing development project-in collaboration with RAL/STFC, Elettra Sincrotrone Trieste, Diamond, and Pohang Accelerator Laboratory-is the CMOS-based soft X-ray imager PERCIVAL. PERCIVAL is a monolithic active-pixel sensor back-thinned to access its primary energy range of 250 eV to 1 keV with target efficiencies above 90%. According to preliminary specifications, the roughly 10 cm × 10 cm, 3.5k × 3.7k monolithic sensor will operate at frame rates up to 120 Hz (commensurate with most FELs) and use multiple gains within 27 μm pixels to measure 1 to ∼ 100000 (500 eV) simultaneously arriving photons. DESY is also leading the development of the AGIPD, a high-speed detector based on hybrid pixel technology intended for use at the European XFEL. This system is being developed in collaboration with PSI, University of Hamburg, and University of Bonn. The AGIPD allows singlepulse imaging at 4.5 MHz frame rate into a 352-frame buffer, with a dynamic range allowing single-photon detection and detection of more than 10000 photons at 12.4 keV in the same image. Modules of 65k pixels each are configured to make up (multi)megapixel cameras. This review describes the AGIPD and the PERCIVAL concepts and systems, including some recent results and a summary of their current status. It also gives a short overview over other FEL-relevant developments where the Photon Science Detector Group at DESY is involved. © 2016 International Union of Crystallography. Source

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