Public Note / ACCDT / CONTROLS ILC-NOTE-2007-025

Timing and RF Phase Reference for ILC Reference Design

Lenkszus, F. (Argonne National Laboratory) ; Chase, B. (Fermi National Accelerator Laboratory) ; Simrock, S. (DESY) ; Carwardine, J. (Argonne National Laboratory)

Abstract: Precision timing is needed throughout the machine to control RF phase and time-sampling beam instrumentation. The Timing System is envisaged to emulate the architecture of the control system with a centrally located dual redundant source distributed via a dedicated star network by dual-redundant fiber links to all machine sector nodes. Timing receivers will distribute timing references intra-sector. Timing is phase locked to the RF system and stability at the point of RF measurement and control has to be ~10 picoseconds. The more demanding bunch compressors require a short-term stability of ~100 femtoseconds. The system will be designed to auto-failover in the event of a link failure between main control and a remote node. The fibers are temperature compensated to achieve phase stability by use of a shorter series section of fiber in a temperature controlled environment. The system builds on prior investigations done at NLC and TELSA and uses commercial off-the-shelf components.

The record appears in these collections:
Accelerator Design & Technology > ILC Global Systems > Controls
Documentation > Publications & Notes > ILC Notes
Accelerator Design & Technology > ILC General

 

 Record created 2007-06-21, last modified 2008-09-22


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