# Presentation: 130997

## Run II Operational Issues

- Elvin Harms
- Antiproton Source

## 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

## Operational Issues for Run II

- Mechanics
- Physics

## Mechanics Issues

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

## 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**

## Mechanics - Personnel

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

## Mechanics - Set up time

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

## 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

## Mechanics - Set up time

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

## 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?*

## Mechanics - TLG

***‘******Meijer’ Timelines are not efficient!***
- editing
- machine operation
- planning
- recalling previous modes of running
- frustration

## Mechanics - TLG

- Meijer Timeline

- Load Pbars Timeline

- Load Protons Timeline

- Shot Set-up Timeline

## Mechanics - TLG

- learn new TLG features
*revisit ‘old’ plans*
- implement expanded TLG capabilities
- continue looking at additional possibilities

## Mechanics - Reliability

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

## Mechanics - Reliability

- address known sources of problems
- LLRF processors, infrastructure
- P1  AP3 reproducibility
- Beam loss

## 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

## 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

## Physics Issues

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

## Physics Issues - Run II parameters

## Physics Issues - Current performance

- TOR910/A:IBEAM = 89%
- TOR105/A:IBEAM = 92%
- I:IBEAMS/A:IBEAM = 84%

- TOR105/A:IBEAM = ??%
- TORF16/A:IBEAM = 100+%
- I:IBEAMS/A:IBEAM = 84%

- I:TOR902/I:IBEAMS = 91%
- I:TOR914/I:IBEAMS = 69%
- T:IBEAMS/I:IBEAMS = 57%

- Acceleration efficiency = 96%

## Physics Issues - Current performance

- Uniform Pbar bunches

- coalescing

- Collider Protons

- Loaded Tevatron

## Physics Issues - Areas of Focus

## 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

## Physics Issues - Tools

- P1AP3 tuner

- Accumulator TBT

- Main Injector BLT

- We’re sorry
- no Tevatron BLT display available

## Physics Issues - Tools

- flying wires
- Ion Profile monitors
- BPM’s

## Physics Issues - Shortcomings

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

## 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

## Physics Issues - Unanswered question

- Recycler - when/how to integrate

## 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

## 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

## Conclusion

- Assuring success in Run IIa
- see above
- sweat the details
- we’re the only show on earth
- collisions, luminosity, Higgs, etc.