1 / 9

UED at ASTA: LLRF and triggers

UED at ASTA: LLRF and triggers. Need < 100 fs jitter Currently we measure > 500 fs RMS phase noise in 10 Hz to 10 MHz bandwidth at 476 MHz Excessive phase noise is due to the dirty reference from LCLS (which conveniently provides AC power fiducials for triggering) Suggested improvements:

etta
Télécharger la présentation

UED at ASTA: LLRF and triggers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. UED at ASTA: LLRF and triggers • Need < 100 fs jitter • Currently we measure > 500 fs RMS phase noise in 10 Hz to 10 MHz bandwidth at 476 MHz • Excessive phase noise is due to the dirty reference from LCLS (which conveniently provides AC power fiducials for triggering) • Suggested improvements: • Import clean 476 MHz from linac • Local source with local trigger generation

  2. Courtesy J. Dusatko

  3. Fiber from LCLS

  4. Clean 119 MHz from LI30 • Relic of E-144 FFTB experiment: TW laser synced to beam time with 0.5 ps stability • Recommission LI30 RF fiber optic diode laser transmitter (30 mW laser hazard) • Adapt to standard SLC fiber • Fiber patch LI30 to B44 • Relocate the receiver (from B407) • No need for a new timing system!

  5. Local source, local triggers Locked 562 fsec RMS jitter Unlocked 50 fsec RMS jitter

  6. Local source, local triggers • The unlocked PLL has a relatively clean 476 MHz source • Still need triggers: Rebuild/borrow spare HW to reproduce LCLS fiducial generation in the klystron test lab

  7. Courtesy J. Dusatko

  8. LINAC triggers

  9. Courtesy J. Dusatko

More Related