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TUOBI1 |
SACLA (XFEL/SPring-8) Project -Status of Beam Commissioning- |
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- H. Tanaka
RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
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The Japanese XFEL at SPring-8, which was named SACLA (Spring-8 Angstrom Compact free electron LAser), was completed in FY2010. After RF full-power aging the beam commissioning of SACLA has been started since 21 February 2011. About one month later, in 23 March a design beam energy of 8 GeV was achieved and a spontaneous undulator radiation of 0.8 Angstrom was observed. The beam commissioning has proceeded smoothly and since the middle of April we have entered to a tuning phase towards SASE lasing. We have already achieved critical beam performances, a peak current of 3 kA and project normalized emittance of a few mm mrad. In the end of May we started fine tuning of the undulator beamline, which is expected as a final hurdle before SASE lasing. This talk will report the beam commissioning overview of SACLA including SASE XFEL performance, key tuning-processes and critical issues for achieving SASE XFEL.
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Slides TUOBI1 [2.536 MB]
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| TUOBI2 |
First Lasing in the Water Window with 4.1nm at FLASH |
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- S. Schreiber
DESY, Hamburg, Germany
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The free-electron laser facility FLASH at DESY, Germany has been upgraded. The electron beam energy has been increased from 1 to 1.25 GeV by adding a 7th superconducting accelerating module. In September 2010, for the first time, lasing in the water window at a fundamental wavelength of 4.1 nm has been achieved. The water window is a wavelength region between 2.3 and 4.4 nm in which water is transparent for light. This remarkable achievement opens the possibility for new class of experiments, especially for biological samples in aqueous solution.
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Slides TUOBI2 [6.481 MB]
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Operational Experience at LCLS |
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- H. Loos
SLAC, Menlo Park, California, USA
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Funding: *Work supported by DOE contract DE-AC02-76SF00515
The Linac Coherent Light Source (LCLS) X-ray FEL has been operational since 2009 and is delivering soft and hard x-rays to users now in the 4th user run. Reliable operation to deliver x-rays to users, quick machine turn on after shutdowns, and fast configuration changes for the wide range of user requests are particularly important for a facility serving a single user at a time. This talk will discuss procedures to set-up and optimize the accelerator and FEL x-ray beam for user operation. The emphasis will be on the most relevant diagnostics and tuning elements as well as the experience with feedback systems and high level support software to automate FEL operation.
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Slides TUOBI3 [3.074 MB]
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