Tevatron Beam Physics Progress Update: Aug 2004 to Feb 2005

1. Tevatron progress: Aug’04 to Feb’05 • Luminosity: (average initial peak L) • Aug.04 (7 stores #3657-3678) L=84.4 • End of Jan (9 stores #3925-3953) L=92.9 (+10%) • -6% N_p, +6% N_pbar, (*eff ) reduced -10% • record L as of Aug.04 103e30 store #3657 record after FY04 shutdown 105.2e30 store #3952 • ~Same lifetimes: L 8.18.7 hrs, eff1617 hrsN_pbar 2522hrs, N_p ~90hrs • Int L is about same (15-18.5 then 16 pb-1/wk now) • FY’05 goal integral 470 pb-1 (now ~100 pb-1)

2. Shutdowns • FY’04 shutdown : 12 weeks, 28 jobs, including • SNEG pipes at D0 and CDF LB Q columns BH, McGee • 2 separators @D17+polarity switches RM et al • 412 dipoles reshimmed D.Harding • 7 um FWs at E11 N.Eddy et al • Kaiser coil and roll measmnts JA, J.Volk • B0 and D0 HLS systems installed J.Volk et al • 4 houses warmed up MechSupport • Short 3 days shutdown Feb’05: 15 jobs including • F17 kicker magnet replaced Bruce • Crystal collimator fixed Dean • Vacuum leak A49 fixed Scott

3. Highlights on Operations/Reliability: • Beam startup took 24 shifts ( ~ as planned) • A bit slowed by troubles with vacuum valves Dean! • Reached pre-shutdown L~60e30 after 9 stores • Suffered from separator sparks for ~12 days in Dec’04 • 3 stores lost , 2 damaged • lowered voltages by 10% on Dec 18, 2004  one spark since then • Mixed source shots regular  very long stores (record 45.3hrs in #3920) • Stores lost due to QFA4, cryo(1), controls(1), RF trips (5 trips, 1 lost), longitudinal damper off (1) • D0 and (less) CDF halo rates are down, LOSTP spiky after 20hrs, no motion at 12 Hz • Superb lifetimes at 150, ramp losses low • Losses in squeeze 1-2% p/pbars, dropped Q’ 208, still… • Scallops – were regular, disappeared after dQ -0.002 change • No transv-dampers at injection  either higher Q’ or Octupoles • CDF and D0 IP positions and angles corrected (upto 3mm) –with correctors or by alignment of B0 LB quadrupoles • Lifetime at 150 is great, losses on ramp smaller • P-lifetime at LB wandering 60hrs160hrs60hrs…

4. Tevatron Beam Physics Progress: • Octupoles: O1 O2 commisioned for differential chromaticity control, OZF OZD for stability at 150  chromaticit reduced as well as losses (esp pbar) (Petr, Yuri and Jerry) • Longitudinal blowup is multibunch mode 1 (Tan) • Lattice re-measured after shutdown at 150 & LB = OK (Valery) • WP scan at EoS  better proton tunes (ZXL, VS, JPC) • Pbar bunch-by-bunch orbits at 150 as modeled (Sasha Valishev) • Tev B-Beam Phenomena paper in progress (many) • Wake field effects seen in head-tail motion (Vahid) • Beam-beam modeling  Q’=0 and 23 RFC idea (Velery, Sasha Valishev) • Theory of b-b resonance diffusion with noise (Yuri) • P-loss rate analysis at HEP and 150 ~ Na/emma^2at (VS) • IBS emittance growth study, 2100 hrs lifetime (Vladimir, Alvin) • Analysis of losses of pbars from RR and AA (Aimin, Tanaji) • MP9 studies of separator sparking  10 times /10kV (Prokofiev)

5. Diagnostics: • Abort gap monitor operational (Randy, Eugene) • New BPMs at A3 and B3, see pbars, TBT (SW, JS, BW, et al), finish in April’05 • Noisy MUX removed better 1.7GHz spectra (Andreas, Ralph) • 7 um FWs @E11 acceptable for CDF&D0 (Nathan Eddy) • SBD reports dP/P and long-Emittance (Bob Flora) • First results from long phase detector (Aisha, BW, JPC) • BBQ shows 60 Hz lines here and there (Tan) • HLS systems at B0 ~works (Jim Volk) • 90% of p-SLite found, nice modeling, progress toward more believable data (Randy) • Q’ from 21MHz Schottky under test (TSen, Paul) • IPM electronics to be ready at the end of March (AJ et al)

6. Misc: • MTF measurement mini-review : 0.7 unit b1 drift, broken anchors not a problem (Pierre B. et al) • BBCompensation review –OK’d FY’05 plan (VS, ZXL, et al) • CDF/D0 lumi ratio still unresolved, D0 admitted errors (Vaia et al) • BTeV cancelled • 6 invited speakers for PAC’05 from Tevatron • Personnel: Out Aimin Xiao  AID Claudio Rivetta Vinay Boocha Sasha Valishev Kip Bishofberger (Mar) • In: Jean-Paul Carneiro (Jan) Elmie Peoples (Jan) Seva Kamerdzhiev (~end of March) Eliana Wendt (~mid March) Sasha Valishev (~April) Alex Koschik (offer sent) • Part-timers MM  Run II Upgr, TSLARP (Tan+Andreas active) • Letter of recognition to Mike McGee

7. Next Steps • Increase Np 230250280 (same Emm)  10…20% in L Tev coord • Lifetime improvements at HEP  6-12% in L • Octupoles@HEP to reduce chroma’s Petr/Yuri • Stabilize pbar tunes in stores Ron • Explore new proton WPs 7/12 < Q < 3/5 Jerry et al • Reduce * 35 28 cm 8-12% in L Sasha/Val • Reduce p-loss at 150 helix (octupoles, tunes)  2-4% in L coord • Fly only E11 Wires at 150 to save 1 pi 1-2% in L Nathan Other items: • Finish BPM installation and Commissioning (BPM project team) • Pbar SL mirror move in/out (Randy, Stephen, Todd) • Commission tune-tracker (CYTan) • Commission head-tail monitor and orbit stabilization (Vahid Ranjbar) • Test magnets, assemble and test TEL-2 (BBC team) • Install IPMs and OTRs (Andreas, Vic et al) • Minor SBD improvements, and FWs OAC with AT dP/P (Flora et al) • Commission Long Phase Monitor (Aisha, Jean-Paul) • Replace RF cavity water-heaters (JohnReid) • Make B0 & D0 HLS systems operational (Jim Volk) • First tests of Crystal Collimator (Dean)

8. Next Three Months: Expectations • Over the next 3 months, I expect: • stable operation at 90-100 e30, combined shots • D0 luminosity monitor fixed (+6% in AVG lumi) • less study time as reliability improves • possible improvements • 10-20% increase in proton intensity with ~same emittance • 5-10% more pbars from RR  smaller Emm, 120mA stash • 5-10% lumi-lifetime improvements WPs, octupoles, etc • * 35 28 cm studies to start and may be even cashed in • As the result, I expect peak CDF luminosity to be around 120-130e30 by May 1, 2004