2025 ALS LINAC and SHB Characterization

1. RF power levels and waveforms of all signals provided at cable output in the racks
2. Amplitude and phase stability of the RF system and components - intra pulse and inter pulse
3. Latency breakdown

Peak Power and Waveform Summary

• All data stored here
• Time estimate - request 4 hrs for margin
  • Peak power measurements: 0.5 hr
  • Scope measurement:
    • Validate trigger: 0.5 hr
    • Waveform alignment: 0.5 hr
    • Take data, moving cart with scope around, capturing overlays: 1 hr
      • TODO: add desired timing overlay captures
  • Restore all cables and confirm normal operation
• TODO: confirm all cables installed; has cable 107 been replaced?

LINAC Stability Summary

• Disconnect SMA100B MO output
• Replace with FSWP Reference output
• Use LMX1214 frequency divider to divide the 2,997.8 MHz signal back to 499.634 MHz MO reference
• Measure phase and amplitude additive noise
• Time estimate: 3 hr
  • Disconnect MO and confirm nominal operation with FSWP output as MO: 15 min
  • Confirm pulsed RF signal on high speed scope: 30 min
  • Measure additive and absolute amplitude and phase noise: 1 hr
  • Restore all connections and confirm nominal operation: 30 min
• TODO:
  • Lay down required cable runs and check losses
  • Setup measurement infrastructure, power supply, cart, etc