Run II Operational Issues

1
Run II Operational Issues

• Elvin Harms
• Antiproton Source

2
Engineering Run summary

• mechanics of 36 X 36 were demonstrated and
  refined
• luminosity provided - 57.6 nb-1 delivered to CDF
• lessons continuously learned
• kudos to all involved

3
Operational Issues for Run II

• Mechanics
• Physics

4
Mechanics Issues

• Personnel
• Set up time
• Time Line Generator (TLG)
• Reliability
• Sequenced Data Acquisition (SDA)
• Sequencer

5
Mechanics - Personnel

• shot teams to provide around the clock coverage
  necessary at onset of run
• expanded cadre of experts necessary, but...
• experts cannot do shots forever
• experts needed for analysis, luminosity
  improvements, Run IIb, and
• keep the complex working

6
Mechanics - Personnel

• Operations team is an invaluable commodity
• concerted effort to train/assimilate MCR crews -
  variety of ways
• teamwork communication

7
Mechanics - Set up time

• set up time reduced from gt 1 shift to 3 hours,
  can do better
• how much better?
• Identify shortcuts
• routine express lane set up
• detailed check-ups as needed

8
Mechanics - Set up time

• Successes already
• loading protons 9 seconds per bunch X 36 bunches
  324 seconds
• loading antiprotons 33.6 seconds per transfer X
  9 transfers (4 bunches/transfer) 302.4 seconds

9
Mechanics - Set up time

• Bottlenecks
• beam lines tune up
• Accumulator reverse proton TBT tune-up
• diagnostics set up, working, data archived
• Tevatron energy

10
Mechanics - TLG

• new paradigm needed
• can we move further away from canonical 220
  second Supercycle?
• Greater use of specialized Timelines
• Modules developed during Engineering Run
• more discipline/planning a priori
• how many times has this been discussed?

11
Mechanics - TLG

• Meijer Timelines are not efficient!
• editing
• machine operation
• planning
• recalling previous modes of running
• frustration

12
Mechanics - TLG
Meijer Timeline
Shot Set-up Timeline
Load Pbars Timeline
Load Protons Timeline
13
Mechanics - TLG

• learn new TLG features
• revisit old plans
• implement expanded TLG capabilities
• continue looking at additional possibilities

14
Mechanics - Reliability

• pay attention to problems no matter how minor
• anticipate/learn from past experience
• new Fermilab attitude?
• document
• disseminate information/2-way communication

15
Mechanics - Reliability

• address known sources of problems
• LLRF processors, infrastructure
• P1 ? AP3 reproducibility
• Beam loss

16
Mechanics - SDA

• Java SDA works to 0th order
• continue to input devices SDA Editor
• fully commission SDA viewers
• fold in data from Applications/remote diagnostics

17
Mechanics - Sequencers

• Sequencers foster consistent shots
• Machine sequencers must be coordinated - Master
  Sequencer/States?
• Sequencer code becoming more generic
• rely less on special commands
• enhance Applications to handshake with Sequencer

18
Physics Issues

• Run II goals
• Current performance
• Tools
• Shortcomings
• Areas of Focus

19
Physics Issues - Run II parameters
20
Physics Issues - Current performance
TOR910/AIBEAM 89 TOR105/AIBEAM
92 IIBEAMS/AIBEAM 84
TOR105/AIBEAM ?? TORF16/AIBEAM
100 IIBEAMS/AIBEAM 84
ITOR902/IIBEAMS 91 ITOR914/IIBEAMS
69 TIBEAMS/IIBEAMS 57
Acceleration efficiency 96
21
Physics Issues - Current performance
coalescing
Uniform Pbar bunches
Loaded Tevatron
Collider Protons
22
Physics Issues - Areas of Focus
23
Physics Issues - Tools

• make the most of new tools, share ideas and
  techniques

AP1 Wall Current Monitor TDS 640 Scope
Accumulator Core Vector Signal Analyzer
24
Physics Issues - Tools
P1?AP3 tuner
Accumulator TBT
Were sorry no Tevatron BLT display available
Main Injector BLT
25
Physics Issues - Tools

• flying wires
• Ion Profile monitors
• BPMs

26
Physics Issues - Shortcomings

• flying wires
• Beam line BPMs - must overcome timing
  overlap/conflicts
• MI BPMs - must be able to detect Pbars
• Auto-tuning using developed tools
• intensity monitor cross-calibration

27
Physics Issues - Areas of Focus

• Emittance growth during unstacking
• Pbar injection into MI
• Coalescing
• efficiency
• maximum bunch limit
• performance as a function of bunch intensity
• Main Injector to Tevatron efficiency for Pbars

28
Physics Issues - Unanswered question

• Recycler - when/how to integrate

29
Conclusion

• Accomplishments to date
• re-established the Tevatron as a Collider
• assimilated the Main Injector into the Collider
  complex
• commissioned a new Accumulator unstacking scheme
• succeeded at 36 X 36 bunch operation
• delivered luminosity to users

30
Conclusion

• What we need to do by 1 March
• SDA up and running
• Intensity monitors calibration
• reduce longitudinal emittance during unstacking
• improve coalescing efficiency
• MI to Tevatron improved transmission
• training
• teams in place

31
Conclusion

• Assuring success in Run IIa
• see above
• sweat the details
• were the only show on earth
• collisions, luminosity, Higgs, etc.