# Presentation: 679898

## Week in Review: 02/17/03 –02/23/03

**  ****Ron Moore – FNAL**

- Store Summary
- Failed Tev dipole disassembly
- Schedule for Week

- All Experimenters' Mtg - 24 Feb 03

## Store Summary

| Store | Initial
Lumi | Deliv’d
Lumi | Termination | Comments |
| --- | --- | --- | --- | --- |
| 2236 | 19.2 | 370 | Abort | Com Ed glitch tripped Tev RF |
| 2256 | 30.1 | 148 | Quench | D0 low beta quad trim regulator failure |
| 2260 | 24.2 | 863 | Intentional | Shot from 100 mA; proton length blow-up
TeV transverse dampers on @ 150 GeV |
| 2262 | 28.4 | 1145 | Intentional | ARF4 caused wide disparity in pbar intensities |
| 2264 | 30.8 | 582 | Quench | F3 CC tripped off (again, as in store 2221) |
| 2270 | 20.0 | 785 | Quench | Shot from 100 mA; ARF4 woes continue
E1 CC tripped off (as in 2264) |
| 2271 | 23.2 |  | ongoing | Shot from 143 mA; ARF4 really misbehaved |

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Slide 3

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Slide 4

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Operational Issues

- Continued great running of proton source
- Routinely provide 4.8-4.9 E12 protons/pulse on pbar target
- Saw 5.3 E12 protons/pulse from Booster, but MI lost at transition
- Sustained 3 E16 protons / hour to MiniBoone while stacking
- Pbar
- Have had several 140 mA stacks
- Partial retreat on impedance increase last week
- Pbar coalescing 85-90% when ARF4 OK
- Try longitudinal damper to prevent beam shaking when unstacking
- Tev luminosity improved
- DC beam losses on ramp @ B26, B38 moved with orbit bumps
- Transverse dampers operational again
- Back to pre-shutdown proton intensities
- Cryo cold-compressor trips
- 3 stores lost prematurely in past 2 weeks
- Electronic noise from heater affecting relays in controller?  Replace relays

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## MI proton intensity during stacking cycles

- MI DC beam  E12
- Protons on pbar target E12

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Last 4 stores

- 5 stores prior to
- last week’s studies

-  Back to pre-shutdown proton intensities

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

##  Not yet back to typical intensities 800-900 E9

- One of the best stores pre-shutdown

-  Not yet back to typical intensities 800-900 E9

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Failed Tev Dipole from C34

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## This Week’s Schedule

- Shoot pbars to Recycler tonight (first since shutdown)
- CDF 2-4 shift access to repair COT starting Tuesday 06:00
- Pbar 1 shift access to repair
- 4-8 GHz momentum pickups
- sextupole water leak (replace magnet? – does not break vacuum)
- Tevatron 3-5 shifts of maintenance/studies
- Cryo to replace relays to prevent cold-compressor trips
- Pbar to address ARF4 misbehavior
- Shoot next HEP store Thursday evening
- Stack & store over weekend
- Resume fast pbar shots to Recycler after HEP store begins

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Weekly Schedule

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03

## Summary

- Delivered luminosity better than last week 4.1 pb-1
- Tev proton intensity back to pre-shutdown levels
- ARF4 cavity still degrading pbar coalescing, intensity in Tev
- Proton source continues to run very well
- 4.9 E12 protons/pulse on target routinely
- Recycler getting first pbars since shutdown, ready for regular shots after HEP stores begin
- CDF 2-4 shift access to repair COT, 3-5 shifts Tev studies
- Next HEP store Thursday evening
- Stack and store through the weekend

- R. Moore - FNAL

- All Experimenters' Mtg - 24 Feb 03