Yujong Kim: Start-To-End (S2E) Simulation and Diagnostic Section of 250 MeV Injector with CTF3 Gun Type V Room: WBGB 020 RB (re p. 5): How do you get 0.2 mm mrad thermal emittance with 32 A? YK: I am using a k value of 0.4 eV, you probably use a larger value. MP (re p. 5): At 120 MV/m you will need more power, more like 30-31 MW! RB: In the original design the energy chirp was chosen such that the remaining chirp exactly matches the wakefields of the 6 GeV linac - did you consider this in your solution? YK: In the case of the rf gun, it is quite easy to control the chirp in the downstream region (easier than for the pulser solution). RB (re p. 19): The diagnistics should be specified to work also for 0.1 emittance, since this range still is the utlimate aim of the project! RB (re p. 21): Would the growth in projected emittance at the end go away with a shorter pulse form? YK: It looks like this is a combined effect from space charge, CSR, but also wake fields. RI (re p. 28): Does the optics of the second half of the injector now depend on the source or not? YK: The positions of the devices are the same, but the settings may change! RB: One should keep in mind that the beta function for the pulser solution followed from a certain choice, namely to keep the rho parameter above 1, so we can use solenoids for focussing. RI: The quadrupole positions follow from an optimization made with the CTF3 gun - would these positions be different if you had used the pulser in your opimization? YK: The question is irrelevant. The main difference between the two solutions is the initial beta/alpha function in the third accelerator structure, the rest is almost the same. The optics can easily be rematched in the case of the pulser. MP wonders if CSR is affecting the matching problem.

AOB Room: WBGB 020 RB: We now need a meeting to reach a consensus on source parameters etc. for further work! TG: We should also perform tolerance studies: e.g. what if you don't achieve the 120 MV/m? TS: Should we also invite RF experts in such a meeting? TG: Not necessarily, we know the relevant gun parameters. RB transmits two items of information from AA (who has already left): Steve Russel is still simulating the injector (CDR design) with OPAL. The FELSIM cluster is in house, installation should be finished this week. BO, on the second item: the requests for library installations on FELSIM have been transmitted to Valeri Markushin. Not all of requested libraries, however, can be installed next week (there are too many). RI inquires about the availability of matlab on FELSIM.