2002 Structures Meetings
These meetings are organised on a weekly basis and are chaired by the group leader Juwen Wang.
Week 12-26-02 and Week 1-2-03 No meeting. Merry Xmas and a Happy New Year for 2003!
Week 12-19-02 (Valery -Dark currents H60 and H90, Chris -H60VG3S matching cup design, Jim - H60VG3R Beadpull measurements)
Week 12-12-02. No meeting. Many attend ISG9
Week 12-5-02 (Jim -H60VG3N Beadpull tuning results)
Week 11-28-02. No meeting. Happy Thanksgiving!
Week 11-21-02 (Juwen -MC coupler, Perry -1.5 TeV design TW vs. SW, Nicoleta -DESY HOM measurements trip report)
Week 11-14-02 (Zenghai -H75VG4 a/lambda 0.18 vs 0.17, Roger -H75VG4 Wakefield damping with opt coupling + Beam dynamics)
Week 11-07-02. All attend MAC meeting. Note there was also a NLC Collaboration Meeting a few days afterwards.
Week 10-31-02 (Ron - Comments on breakdown features of a/lambda ~.18 vs .17, Dave -Global schedule, Valery - Dark currents in H60VG3, Zenghai -Structure studies incl. H75VG4, Roger -M100VG6 DDS wakes, M100VG6 choke mode options
Week 10-24-02 (Juwen - Long-range planning (2003),Valery - CAD choke pic, Zenghai -a/lambda ~0.17, 135 & 150 deg. comparison
Week 10-17-02 (Jim - H90VG3 beadpulls/tuning status,Chris -T53VG3MC (Operating at 92 MV/m) + H60VG3 breakdown update, Zenghai -Comparison of Es, Vg for H60VG3/DS1/H90VG5 + others)
Week 10-10-02 (Jim - H90VG3 beadpulls/QC status,Roger -Beam loading compension via pulse shaping, Roger -H90VG5 tolerances for optimized 3-fold interleaved,Chris -Designing a/lambda structure with low Vg)
Week 10-3-02 (Dave -Overall fabrication schedule, Zenghai -135 degree,a/lambda=0.17 structure, Valery -Pulse temp simulation I/P + coupler H60VG3 )
Week 9-26-02 (Frederic -Breakdown SEM of T53VG3R & T53VG3RA, Roger -Ramped pulse propagation through H60VG3, Nicoleta -Wire measurement progress)
Week 9-19-02 (Juwen -Coupler design at Fermi Lab, Chris -Review of several SLAC couplers, Cho -Pulse heating, Roger -Beam loading and energy minimization via pulse shaping, Roger M -Equations for minimizing energy spread due to dispersion, Nicoleta -Wire measurement progress)
Week 9-12-02 (Valery - T53MC breakdown, Jim -Phase measurement before and after high grad processing with systematic freq adjustment, Roger -Beam loading and energy spread along bunch train for H60VG3, Zenghai -135 degree structure + 1 meter structure)
Week 8-5-02. No meeting
Week 8-29-02 (Valery - Approx formulae for breakdown +PIC simulations, Jim -Phase measurement before and after high grad processing, Roger -Beam energy gain for H60VG3, Zenghai -135 degree structure)
Week 8-22-02. No meeting. Many attend LINAC2002
Week 8-15-02 (Roger -BBU + Emittance dilution for H60VG3, Nicoletta -Simulation of wire tilt, Roger M + Zenghai -135 degree structure)
Week 8-8-02 (Roger -Optimized H60VG3 Manifold damped "pie" slots + Interleaved Wakes, Nicoleta -Wire measure update, Valery -trapped modes in Chris N. coupler)
Week 8-1-02 (Jim -T53VG3RA Phase measurement, Roger - Single HDDS1 non-interleaved well damped!, Valery -Arnie's gun, Nicoleta -Wire measurement update)
Week 7-25-02 (Valery -SW565 + Arnie's gun freq sensitivity, Roger -Dispersion + pulse propagation thru H60VG3, Zenghai - 6 cells of pie slotted HDDS1, Nicoleta -Wire measurement update)
Week 7-18-02 (Juwen -Phase+S11+Smith chart T53VG3MC, Zenghai -Dispersion curves HDDS1 )
Week 7-11-02. No transparencies available
Week 7-04-02. National holiday, July 4th.
Week 6-20-02. All attend Fermi/KEK/SLAC collaboration meeting: ISG8
Week 6-20-02 (Valery -SW breakdown images + pulse heating, Jim -T53VG3MC time domain S11, Gordon- HDDS1 "pie" shaped slot, Roger -Limited local damping H60VG3, Nicoleta -Wire measurement initial exp.)
Week 6-13-02 (Transparencies not available)
Week 6-06-02 (Several attend EPAC2002 in Paris, France)
Week 5-30-02 (Juwen -Phase T53VG3RA, Valery -Pulse heating SW565 + field phase and ampl in T53VG3RA, Roger -H60VG3 alignment tolerance LR + SR wake imposed for 10% emittance growth)
Week 5-23-02 (Juwen -SW565 Gradient vs. power, Nicoleta -Wire measurement, Roger -SW fund mode freq. tolerances, SWPi20_565 wake, HDDS90VG3 wake)
Week 5-16-02 (Nicoleta -Single coupler S11, Zenghai -Pulse heating in (R)DDS, Valery -Choke mode SW)
Week 05-9-02 (No meeting - many attend FNAL/SLAC Collaboration workshop at FNAL)
Week 5-02-02 (Valery+Nicoleta+Nicolay -Coupler S11, Valery-Coupler slot pulse temp rise)
Week 4-25-02 (Nicoleta+Juwen+Roger - Coupler S11, Valery -Pulse heating + coupler discussion)
Week 4-18-02 (Cho + Nicoleta - H60VG3OUT Coupler S11, Valery -Pulse heating in I/P iris in H60VG3N coupler)
Week 4-11-02 (Cho + Nicoleta -Detailed coupled design S11, Roger+Valery -SW Wake, Ron+Juwen -Transient effects on breakdown)
Week 4-04-02 (Roger -HDDS1 Sum wake RMS and sigma for Gaussian vs. sech1.5 wake, Zenghai -Power density on slot edge, Valery -Detailed SW 3-band intial coupler-damped wake)
Week 3-28-02 (Roger -HDDS1 Gaussian vs. sech1.5 wake + upper band wakes, Valery -Detailed SW coupler-damped wake)
Week 3-21-02 (Roger -HDDS1 Sech^1.5 wake + results of optimisation code for coupling, Nicoleta -DESY trip report and Sept exp proposed on "superstructures", Valery -SW damping with emphasis on multi-band kick factors
Week 3-14-02 (Juwen -SWPIL Pair S11 & S21 measurment, Roger -BesselJ1(x)/x) wake + min at 4 zeros of envelope
Week 3-07-02 (Roger -Reduced bandwidth design for HDDS1, Valery -2D + initial 3D Const. Impedance SW damping)
Week 2-28-02 (Roger - HDDS1 reduced slot penetration wake, Roger -SW final tuning exp + impedance theory )
Week 2-21-02 (Chris N. - TM01 mode launcher coupler, Zenghai -SW20365 tuned field)
Week 2-14-02 (Rod -SW20565 final tune measurements, Zenghai -Cup indexing and lengths, Roger J. -SWPI tuning, Valery -surface field calc., Nicoleta -Wire measurement dispersion curves, Roger J. -Short range wake alignment tolerances)
Week 2-07-02 (No meeting - many attend the LC02 workshop at SLAC)
Week 1-31-02 In two sections (Session 1: Valery -SW high grad. measurements, Roger J./Juwen -SW20565a-II Levenberg-Marquardt χ2 tuning, Nicoleta -Wire measurement theory DS2S dispersion curves. Session 2: Roger J. -Extended session on wakes in H60DDSVG3)
Week 1-24-02. (Juwen -SW20565 tuning measurement. Mistuning correction will be reported next week. No transparencies available.)
Week 1-17-02 (Juwen /Rod -H60VG3R Tuning, Roger -H60DDSVG3 Deeper Slots + 4-Fold Interleaved Wake)
Week 1-10-02. (Juwen -wire measurement. Completed result to be discussed next week. No transparencies available for this week.)
All the above meetings are archived in Adobe "pdf" format unless otherwise indicated. The suffix "ppt" refers
to Microsoft powerpoint.
R.M. Jones