38 research outputs found
Prolonged duration of surgery is not a risk factor for postoperative complications in patients undergoing total thyroidectomy: a single center experience in 305 patients
Get PDFSurface and intracardiac ECG for discriminating conduction disorders after CoreValve implantation
Get PDFImproved Functional Activity of Bone Marrow Derived Circulating Progenitor Cells After Intra Coronary Freshly Isolated Bone Marrow Cells Transplantation in Patients with Ischemic Heart Disease
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Increasing Safety of Liver Resection in Cirrhotic Livers. An Initial Experience Combining Autologous CD 133+ Stem Cell Application With in-Situ Splitting and Two Stage Hemihepatectomy
No full textShort SASE-FEL Pulses at FLASH
No full textFLASH is a high-gain free-electron laser (FEL) in thesoft x-ray range. This paper discusses the generation ofvery short FEL pulses in the Self-Amplified SpontaneousEmission (SASE) - mode without an external seeding signal.In the optimal case a SASE-FEL can be operated inthe so-called single-spike mode. At FLASH a new photoinjectorlaser has been commissioned, which allows thegeneration of shorter bunches with low bunch charge directlyat the photo-cathode. This shorter injector laser reducesthe required bunch compression for short pulses andthus allows a stable SASE performance with shorter pulses.First SASE performance using the new injector laser hasbeen demonstrated and electron bunch and FEL radiationproperties have been measured. These measurements arepresented and next steps towards single spike operation arediscussed
