Tevatron progress: May03 to Aug03

1
Tevatron progress May03 to Aug03

• Luminosity (average initial peak L)
• mid-May (6 stores 2538-2555) L42.8
• End of July (5 stores 2815-2826) L40.1
• 6 drop in peak luminosity
• 3 in protons,3 in pbars,-12 in emmittance
  (blown)
• record L as of May.30 44.9e30 store 2555
• record L as of Aug.8 45.3e30 store 2824
• lifetimes of N_p, N_pbar somewhat worse , L the
  same, eff-emittance lifetime improved (19?27hrs)

2
Operations/Reliability

• 9.7 pb-1/week (record), July 21-27
• helpful operational orbit smoothing (CYTan)
• Differential chromaticity reduced ?
  luminosity(Yuri)
• Lower inj energy for pbars ? efficiency (Bruce)
• various problems with RF system (3 stores)
• TEL HV modulator repair 16 hrs access
• collimators control (1 store) fixed (Dean)
• PSs trips too frequent, A2?A3 change
• flaws with C49 tables reloading (doubled lines)
• large pbar losses on ramp, regular scallops,
  P10 unstable after seq.25

3
Tevatron Beam Physics Progress

• Lattice measurements (Valeri, Petr) reveal
  ?-drifts
• Ring wide aperture and dQ scans (Yuri, )
• S6 sextupole detuning, diff Chroma fixed (YA, )
• V4YA ramp helix in process (Yuri, Ron, Jerry, )
• Pbar b-by-b orbits as in model (TSen)
• 1 unit b_0 drift observed at MTF (PBauer)
• 5 injection helix set aside
• not much progress with emittance at inj

4
Tevatron Diagnostics

• Progress with new Schottky for Qv,h
  ,Cv,h,emm(AJ,JS,RP)
• QXR quads tested with beam (Andreas)
• Cv,h from tunefitter progress gt½ done (Paul)
• Interesting results with Ekotech BPMs (Webber,
  Sheppert)
• SBDP(A)IS calibrated to1 (Alvin, Bob Flora)
• Slow progress in understanding SL/FW/Collim
  (AJ,JS,SP)

5
Misc.

• Passed DoE review with B mark (many people)
• Shutdown work reviews A48 (Ron, Wolff), F0
  (PeterI,JimV,Jerry), Alignment (Ray, PeterG)
• Letters of Recognition Ranjbar, Alexahin, Hanna
• New BPM project launched (JimS, Steven Wolbers)
• Upgrade of beam studies Web page again! (Dean)
• Tough situation with time for studies, need to
  show discipline and progress, McGinnis approach

6
Next Two Months

• Operation/Maintenance
• Install, commission inj-dampers (JimS, Tan)
• Finish preparations and start 7(10)wk shutdown
• F0 liner (Peter, Jim Volk)
• A48 (Ron)
• Alignment rolls, quads, stands, smart bolts,
  HLSs (Ray,J V)
• Vacuum (Bruce) to be reviewed
• CDF shield wall (JimV) to be reviewed
• Rewire octupoles (BPhys, Petr, Jerry) decide
  upon details
• Beam studies before shutdown
• New helix ? reduce loss on ramp (Yuri, )
• Emm at injection (Tev, beamlines) (DaveJ,Val,JA)
  
• Studies which may affect shutdown work
• Lattice, diagnostics (C_v,h), etc

7
Next Two Months (contd)

• Diagnostics
• Tev BMP review by Oct 1(JimS)
• Tev IPM review by Oct.1 (Andreas)
• Cv,h and coupling from tunefitter (Paul L)
• Cv,h Qv,h and coupling from head-tail (Vahid)
• Pbar tunes from old Schottky (Markus, Paul L)
• Abort gap monitor (H.Cheung)
• Continue on SL vs FW vs coll (AJ, JS, Stephen)
• Misc
• New helix/separators review in Aug (Ron)
• BBC with wires review in Sep (Tanaji)

8
Next Two Months Expectations

• Last time it was we are around 45-51 by Aug 1
  - we are at 45.3e30
• Over next 2-2½ months, I expect
• shutdown to start Sep 8
• we will get 225 pb-1 over FY03
• possible improvements
• 5-10 more p and pbars due to new helix
  commissioning
• As the result, I expect well be around 45-51e30
  by Sep.8, 2003