September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 1 DR Kicker R&D: Goals and Work Scope Michael S. Zisman and Tom Mattison

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 2 Caveats This is the first pass, not the final story Proposed activities not (yet) based on funding realities The global DR R&D effort will be defined and assessed by the S3 task force All WPs except last 2 have “very high priority”

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 3 R&D Goals Specify component performance parameters –rise time, fall time, tolerances can any be relaxed to make the system more robust or cheaper? –acceptable impedance, vacuum properties, ECI issues Demonstrate one or more technologies that meet specs –bench tests of pulser short-term, long term, abuse-tolerance verify burst mode operation –bench tests of kicker structure –bench tests of pulser+structure+load system –beam tests of pulser+kicker+load+controls system measure system pulse shape (can be single-pulse, should be high- resolution) verify beam interaction properties (ideally in realistic ring) –emittance preservation

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 4 Institutions Involved U.S. –Cornell, FNAL, LBNL, LLNL, SLAC, UIUC Japan –KEK Europe –INFN-LNF It would be good to involve other groups in this “very high priority” effort

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 5 Work Packages (1) Inductive Adder FET Pulser –Cook, Burkhart, Cassel, Krasnykh, Larson, Ross, Naito Plans: –FY07: Modulator prototype development –FY08: Modulator prototype testing; HA element design –FY09: High Availability testing Comments –beam testing planned in context of ATF2 program –need to improve intrinsic rise time before High Availability becomes the main issue

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 6 Work Packages (2) Drift Step Recovery Diode Pulsers –Krasnykh, Burkhart, Gollin, Meller, Urakawa, De Santis, ?? Plans: –FY07 continued testing of commercial (FID GmbH) limited voltage and rep- rate devices (bench, beam) pulser development (SLAC + SBIR) –FY08 DSRD as pulse-sharpener for other pulsers Comments –existing “FID” tests seem to have been DSRD pulsers! –concerns about robustness –single-source issues SLAC+SBIR effort helps address that

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 7 Work Packages (3) Collaborate with FID GmbH –?? Plans –FY07 determine switching technology used in what we have tested test pulsers with real FID used as final switching element understand proposal for high-voltage, high rep-rate pulser –switching technology –other technical issues being addressed –level of information sharing decide how to proceed –FY08 proceed

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 8 Work Packages (4) Stripline structures Plans –FY07 EM simulations (field uniformity, matching, tapers, fins, etc) –De Santis, Krasnykh, LNF, ?? feedthrough development (matching, voltage, manufacturing) –Krasnykh, LNF, ?? structure fabrication –LNF for DAΦNE (already done for ATF2) structure bench tests –could be done with beam test structure –FY08 structure tests with beam –DAΦNE, ATF2

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 9 Work Packages (4) cont’d Comments –systematic studies of kicker structure and feed- through design need to be expedited –need to look for trapped modes in structure with computer codes with wire measurements (LBNL?) develop damping methods for structure if needed

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 10 Work Packages (5) Beam Tests at Fermilab A0 –Gollin, Meller, Edwards, ?? Plans: –FY07 continue tests with FID pulser: time & amplitude stability, reliability systematics of time measurements kicker measurement sensitivity to AØ beam stability –FY08 investigate possibility of tests with other pulser technologies investigate AØ reconfiguration: redundant measurements; two phase detectors; better BPMs; lower fringe field magnets –FY09 reconfigure AØ for measurements of realistic system

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 11 Work Packages (6) Beam tests at ATF –Urakawa, DeSantis, Meller Plans: –FY07 improve instrumentation for kicker tests –bpms; laser wire emittance measurements; DAQ retest system with multiple bunches –plan to complete test program during 2007 may preclude tests of other candidate systems Comments –most realistic test under “combat” conditions

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 12 Work Packages (7) Beam tests at DAΦNE –Alesini, Guiducci, Marcellini, Raimondi, DeSantis Plans: –FY07 Feedthru development, stripline fabrication, bench tests –FY08 Install and operate in DAΦNE production running –FY09 test with alternative pulser systems ?

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 13 Work Packages (8) Examination of other pulser technologies –Mattison, ?? Plans: –FY07 bench-test ferrite shockline with (FET?) pulser explore other technologies to see if any have promise in terms of performance, cost, reliability, tech transfer –FY08 develop and bench test other systems if promising candidate identified –FY09 test with beam? Comments –ferrite shock lines, avalanche transistors, hard tube pulsers are candidate technologies identified to date

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 14 Work Packages (9) Outside the box –Gollen, Meller, Willeke, Wolski, Rubin, ?? Possibilities –Fourier transform scheme –RF separator for kicker-septum region –off-axis injection with slow kickers for electrons –big slow bump and small fast kick for electron extraction

September 28, 2006-Cornell (Zisman/Mattison) Global Design Effort 15 Summary We have begun task of planning and prioritizing DR R&D kicker program for the TDR phase Still lots to do –develop priority list reconciled with RDB priorities –develop effort and M&S requirements much of this exists already at least partially –develop critical milestone list based on assumption that required resources will be provided indicate what key questions will be answered each year and why they are important Costs matter: should we focus on least expensive technology?