| Paper |
Title |
Page |
| WEPB16 |
First prototype of an optical cross-correlation based fiber-link stabilization for the FLASH synchronization system
|
265 |
| |
- F. Löhl, H. Schlarb
DESY, Hamburg
- J. Chen, F. X. Kaertner, J. Kim
MIT, Cambridge, Massachusetts
|
|
| |
A drift free synchronization distribution system with femtosecond accuracy is of great interest for free-electron-lasers such as FLASH or the European XFEL. Stability at that level can be reached by distributing laser pulses from a mode-locked erbium-doped fiber laser master oscillator over actively optical-length stabilized fiber-links. In this paper we present a prototype of a fiber-link stabilization system based on balanced optical cross-correlation. The optical cross-correlation offers drift-free timing jitter detection. With this approach we were able to reduce the timing jitter added by a 400 m long fiber-link installed in a noisy accelerator environment to below 10 fs (rms) over 12 hours.
|
|
| TUPB30 |
Applications of IEEE-1394 and GigE Vision Digital Camera in the TLS
|
138 |
| |
- C. H. Kuo, J. Chen, P. C. Chiu, K. T. Hsu, S. Y. Hsu, D. Lee, C. Y. Wu
NSRRC, Hsinchu
|
|
| |
Digital cameras comply with IEEE-1394 and GigE Vision standard are applied for beam diagnostic applications at NSRRC. These cameras provide low distortion for image transmission over long distance and flexible camera parameters adjustment with remote interface. These digital interfaces include of FireWire and gigabit Ethernet. The wide bandwidth bus can reduce latency time and timing jitter effectively and provides high quality image transportation. It also provides lossless compressed image with high update rate. Experiences accompany with both kind of cameras will be summarized. System integration with control system, analysis and application will also include in the report.
|
|
| WEPC17 |
Fast Orbit Feeback System Upgrade with New Digital Bpm and Power Supply in the Tls
|
346 |
| |
- C. H. Kuo, J. Chen, P. C. Chiu, K. T. Hsu, K. H. Hu, K.-B. Liu
NSRRC, Hsinchu
- A. Bardorfer
Instrumentation Technologies, Solkan
|
|
| |
The BPMs of orbit feedback loop use analogy type in the TLS that is more than 10 years. The analogy type BPM provides high resolution position detection after signal processing. The new generation digital beam position monitor (DBPM) was performed recently. The BPM electronics are commercial available by using direct RF sampling technology, FPGA, and embedded control environment running GNU/Linux. The programmable nature of DBPM system is beneficial for multi-mode high precision beam diagnostics purposes. Sub-micron resolution is achieved for averaged beam position measurement with high update rate. The DBPM are seamless integrated with existed control system and is compatible with old BPM in the orbit feedback loop. In the same time, the corrector power-supply is also upgraded for wide bandwidth control. The integration of old and new BPM, power-supply control for fast orbit feedback will be discussed in this report.
|
|