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Advancing Beam Dynamics: Analyzing Initial Results and Next Steps for Optimized Performance

The first results from our recent high-charge push are in, showcasing significant insights. We've successfully generated a 16-bunch train with a total charge of 560 nC and a 32-bunch train at 600 nC. As we proceed, the focus shifts to systematically characterizing the maximum charge across various train configurations and improving the beam's performance. Actions include maximizing Q, enhancing measurements, designing beam imaging telescopes, and increasing beam energy to 19 MeV. The collaborative effort marks the dawn of a new era in beam dynamics research.

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Advancing Beam Dynamics: Analyzing Initial Results and Next Steps for Optimized Performance

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  1. The dawn of a new era Beams! Beams! Beams!

  2. The first results are in Below are the results of our very first push to high Q • 16 bunch train • Qtot = 560 nC • Bbunch = 35 nC • 32 bunch train • Qtot = 600 nC • Bbunch = 19 nC Now it is time to step back and consider what to do next

  3. Low Q lambda (32 bunches) 4 lambda 8 lambda 16 lambda

  4. Raise the Q Total = 160 nC 5 nC per bunch Total = 352 nC 11 nC per bunch Total = 480 nC 15 nC per bunch

  5. brainstorm: next steps • Systematically characterize the max Q for various trains • Lengths: { 1, 2, 4, 8, 16, 32} • Charge: {100, 150, 250, 400, 560, 600} • Charges separated by 2*lambda, ?? • Improve balance of train • Begin to make careful measurements of the trains • Compare laser intensity to charge of each bunch • Install the rest of the multisplitter flags • Finish upgrade of mutlisplitter hardware to make room for flags. • Measure and improve profile at virtual cathode (integrate light to get laser intensity; • Finish design of and order beam imaging telescope. • Increase beam energy to 19 MeV • Power accel cavity #1 • Chiller cavity test #1 & #2 • Single beam into gatevalve

  6. brainstorm: next steps • talk to bergoz, try filter, check max charge for ICT, 1000nC?? • Calibrate the inflange ICT to an out flange ICY by installing an ICT at the location of the YAG screen • Make a QE measurement (check 5 points) • Consider raising vacuum trip point to get above 500 nC • Look at rf probe in gun for beam loading • Comprae probe and fct on fast scope

  7. Action items (near term) • Systematic measurements • Compare rf probe and fct • (ch 2) Look at rf probe in gun for beam loading • (ch 3) Comprae probe and fct on fast scope • Measure laser intensity photodiode; fix the iris • Add flags to multisplitter • Add laser profile camera at virtual cathode • Compare fct and laser intensity • (ch2) Fast photodiode, ET-2000, for shot-by-shot laser intensity/beam charge comparison • (ch3) FCT

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