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The dawn of a new era

The dawn of a new era. Beams! Beams! Beams!. 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. Low Q.

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The dawn of a new era

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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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