RF distribution from timing system CanvasFormat.CV5NLC RF Distribution System
The NLC RF phase is distributed using the same fiber optic system used for timing distribution. The X-Band reference phase is derived from an oscillator locked to a harmonic of the 714 MHz RF signal from the timing system.
RF distribution from timing system CanvasFormat.CV5
System Components:
SFOR Stable Fiber Optic Receiver.
Mixer: The mixer will need a phase stability of 0.03 degrees. This requirement can be met with conventional mixers.
Low Level RF phase and amplitude control: This system is described in the LLRF meeting notes.
High Power RF, klystron, distribution, and accelerator structure: Discussed in various areas of the NLC web site.
VCXO: Based on the results of initial fiber optic phase transmission system phase noise measurements (performed at 120MHz) of about -115dB/Hz phase noise, the VCXO will need to have a phase noise better than about -110dB/Hz at 1KHz offset. Crystal oscillators are available with phase noises of better than -130dB/Hz at a 1KHz offset are available, however, non-crystal VCOs will not meet the phase noise requirements.
Beam vs. Klystron phase comparison: Discussed in NLC Beam Phase Monitor.
Page by Josef Frisch frisch@slac.stanford.edu 04/22/2002
Links to: the NLC Home Page, the SLAC and KEK Institutional Home Pages.