| Paper | Title | Page |
|---|---|---|
| TUPF05 | Production Process for the European XFEL Re-Entrant Cavity BPM | 307 |
|
||
| As In-Kind contributor to the E-XFEL project, CEA is committed to the procurement of around one third (31) cold beam position monitors (BPM) of the re-entrant RF cavities type and to the assembly on the Saclay site of the 101 cryomodules of the superconducting linac. Each cryomodule is equipped with a beam position monitor connected to a quadrupole at the high-energy end of the cavity string. The industrial process of those BPMs, used in an ultra-clean environment at cryogenic temperature, includes several steps and involves a quality control in collaboration with industrial partners. This paper describes the different steps of the re-entrant cavity BPM fabrication process: machining, copper coating, thermal treatment, EB welding, cleaning and mounting in clean room on the quadrupole. Problems encountered and the lessons learnt will be also reported. | ||
| Export • | reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml) | |
| TUPF07 | FLASH Undulator BPM Commissioning and Beam Characterization Results | 315 |
|
||
|
Recently, the commissioning of FLASH2 has started, a new soft X-ray FEL undulator line at the DESY FLASH facility. In the FLASH2 undulator intersections, the beam positions are measured by 17 cavity beam position monitor (CBPM) pick-ups and electronics* developed for the European XFEL (E-XFEL). In addition four CBPMs are available at FLASH1 for test and development. The new CBPM system enables an unprecedented position and charge resolution at FLASH, thus allowing further analysis and optimization of the FLASH beam quality and overall accelerator performance. Results of first beam measurements as well as correlations with other FLASH diagnostics systems are reported.
* M. Stadler et al., “Low-Q Cavity BPM Electronics for E-XFEL, FLASH-2 and SwissFEL”, this conference. |
||
|
Poster TUPF07 [1.112 MB] | |
| Export • | reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml) | |
| TUPF11 | Mechanical Design of Cryogenic Vacuum Feedthroughs for X-FEL Button BPMs | 332 |
|
||
| The European XFEL is a 4th generation synchrotron radiation source, currently under construction in Hamburg. Based on different Free-Electron Laser and spontaneous sources and driven by a superconducting accelerator, it will be able to provide several user stations with photons simultaneously. Due to the superconducting technology in the accelerators modules many components have to operate at liquid helium temperature. This poster will concentrate on high frequency ultra high vacuum feedthrough used for the beam position monitors of the cryogenic accelerator modules. Main emphasis will be put on the design of these feedthroughs, their material composition and the production process. The capability to be used under these very special conditions was investigated with FEM simulations, as well as with a test procedure. The results of these simulations will be presented; the tests and their results will be explained in detail. | ||
|
|
Poster TUPF11 [0.407 MB] | |
| Export • | reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml) | |
| WEPD12 | Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL | 670 |
|
||
| PSI has developed BPM electronics for low-Q cavity BPMs that will be used in the E-XFEL and FLASH-II undulators, as well as in SwissFEL injector, linac and transfer lines. After beam tests at the SwissFEL test injector and FLASH, a pre-series of the electronics has been produced, tested and commissioned at FLASH-II [1]. The design, system features, signal processing techniques, lab-based test and calibration system as well as latest measurement results are reported. | ||
| Export • | reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml) | |