Tevatron progress: Aug04 to Feb05

1
Tevatron progress Aug04 to Feb05

• Luminosity (average initial peak L)
• Aug.04 (7 stores 3657-3678)
  L84.4
• End of Jan (9 stores 3925-3953) L92.9 (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, ?eff 16?17 hrs
  N_pbar 25?22hrs, N_p 90hrs
• Int L is about same (15-18.5 then ?16 pb-1/wk
  now)
• FY05 goal integral 470 pb-1 (now 100 pb-1)

2
Shutdowns

• FY04 shutdown 12 weeks, 28 jobs, including
• SNEG pipes at D0 and CDF LB Q columns BH, McGee
• 2 separators _at_D17polarity 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 Feb05 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 L60e30 after 9 stores
• Suffered from separator sparks for 12 days in
  Dec04
• 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 ? Q0 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/emma2at
  (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 April05
• Noisy MUX removed? better 1.7GHz spectra
  (Andreas, Ralph)
• 7 um FWs _at_E11 acceptable for CDFD0 (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 OKd FY05 plan (VS, ZXL,
  et al)
• CDF/D0 lumi ratio still unresolved, D0 admitted
  errors (Vaia et al)
• BTeV cancelled
• 6 invited speakers for PAC05 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
  (TanAndreas active)
• Letter of recognition to Mike McGee

7
Next Steps

• Increase Np 230?250?280 (same Emm) ? 1020 in L
  Tev coord
• Lifetime improvements at HEP ?
  6-12 in ?L
• Octupoles_at_HEP to reduce chromas Petr/Yuri
• Stabilize pbar tunes in stores Ron
• Explore new proton WPs 7/12 lt Q lt 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)

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