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General improvements Upgrades

In the recent CTF3 working meeting, various improvements were discussed including BPM sensitivity updates, gain separation for TL1 and CR, and enhancements to PLC and RF systems. Key points include increasing sensitivity for BPRs 0290 and 0475, addressing noise issues in TL1, and the implementation of a remote reset for phase control interlocks. Additionally, plans for TWT modifications and installation of upgraded power supplies were outlined, emphasizing efficiency and reliability. These updates are vital for optimizing performance and ensuring system stability.

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General improvements Upgrades

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  1. General improvementsUpgrades Loose collection of items Changed – being changed – to be changed CTF3 working meeting

  2. BPMs: BPR sensitivity – DL BPIs • BPRs 0290 and 0475 have low sensitivity for phase measurement • BPR0290: whole range ~8 ADC counts • BPR0475: whole range ~32 ADC counts • Asked for increase by factor 100/10 if possible • 2 adjacent DL BPIsmissing- 0292/0308 • 0308 taken out toreplace another • 0292 to be checked CTF3 working meeting

  3. BPMs: Gain separation TL1 andCR • Noise on the BPIs in TL1 very high • Set to low gain with attenuator on as in the CR (high current) • Can we separate them for the gain setting? • Can we have thecalibration applicationfor the CR to loadcalibrations fordifferent gain settings? Charge stability – Factor 4 with noise estimate (T.Persson) CTF3 working meeting

  4. BPMs: Sampler • Asked CO for proxy for TL2 and CLEX BPMs • HW trigger of Sampler acquisition to be installed • Properly separated for Drive and Probe beam for CLEX • Should fix timestamp uncertainties • Can we include the droop correction for (DL) BPIs in the real-time software? CTF3 working meeting

  5. LLRF / PLC upgrades • PLC upgrade and software upgrade for phase control • Should avoid slow phase response as we had last year • Includes remote reset of PEI interlock • Start with a few and upgrade gradually • Remote setting of CK.GUN-AUTH RF interlocks • Will need to stop ½ - 1 day beginning of March – during CR safety chain test? • Should be transparent for the control system • PLC upgrade and maintenance of CK.MKS02-ATTN/PHAS • Will fix the limited range for pre-buncher phase • Foreseen for next shut-down CTF3 working meeting

  6. TWTs for SHBs • One back from repair soon with phase droop modification=> should decrease stored energy and improve failure rate • Need to program I/Q modulator to correct phase • Others to be sent one at the time for modification=> still left with two SHBs • New systems will be ordered - one to test, more after success • What to do against changing power level??? Use I/Q amplitude? • On/Off remote indication / switch? CTF3 working meeting

  7. High power RF • Splitter and load being installed for CR RF deflector network=> can optimize deflector bump • New charging supplies for MKS11/MKS15 (+heater supplies)=> can go to higher repetition rate (10 Hz) • MKS PLC control for old CAMAC system in development • Stability of MKL02 (low power) • Install higher power amplifier / wave guide splitter and load? • Install WFG (but standing wave cavity) • New klystron for ACS14 foreseen for next shutdown CTF3 working meeting

  8. Various • Power supply for Frascati bend CT.BHB0205 upgraded • CR/DL light interlocked with access system • Local shielding around DL/CR access door • DL injection region survey campaign next week • Faster radiation level reading for software gun interlock • Can we improve the water station regulation for RF pulse compression? • Segmented dump in CTS line – when? CTF3 working meeting

  9. … CTF3 working meeting

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