Paper | Title | Page |
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MOPB009 | Jitter Analysis at CW Repetition Rate With Large Spectral Range and High Resolution | 43 |
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At the superconducting CW accelerator ELBE electron bunch diagnostics has been installed recently, enabling the investigation of bunch arrival-time jitter and electron energy fluctuations for varying bunch compression states. Using these diagnostic systems, a comprehensive investigation has been performed that reveals the influence of the bunch compression to spectral noise components up to a frequency of 100 kHz (i.e. 200 kHz bunch repetition rate). The transformation of arrival-time jitter into energy jitter and vice versa can be observed. The perfomances of a DC thermionic and a SRF photoinjector at the CW- SRF Linac ELBE are compared and an interpretation for different noise components is presented. | ||
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MOPB011 | Trigger Generator for the Superconducting Linear Accelerator ELBE | 46 |
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Funding: none The Center for High-Power Radiation Sources ELBE at HZDR in Germany runs a superconducting linear electron accelerator for research applications. A recent machine upgrade enabled new time resolved experiments and made a replacement of the current trigger system necessary. The requirements focused on centralisation, trigger quality, and versatile trigger pattern generation. To address these needs digital delay generators developed by Bergmann Messgeräte Entwicklung have been evaluated. Each of the FPGA-based PCI boards has 6 independent trigger channels with a resolution of 25 ps. PCI modules can be connected by a dedicated trigger bus to ensure extensibility. The boards are installed in an industrial Windows 7 PC. Trigger generation runs stand-alone in an FPGA making it independent of operating system timing and ensuring stable phase relation between individual channels. FPGA control is possible via C and LabVIEW APIs. The ELBE control system is built with Siemens PLCs and WinCC HMI. A LabVIEW application will offer a GUI for local and remote control via OPC. The contribution will show the layout of the trigger generation system and the status of software development activities. |
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