# Presentation: 680875

## Week in Review: 07/14/03 –07/21/03

**  ****Keith Gollwitzer – FNAL**

- Stores and Operations Summary
- Standard Plots

- All Experimenters' Mtg - 21 Jul 03

## Stores Summary

| Store | Initial
Lum.
(E30) | Deliv’d
Lum. (nb-1) | Termination | Time
(hr) | Stack
Size
(mA) | Comments |
| --- | --- | --- | --- | --- | --- | --- |
| 2786 | 30.9 | 1224 | Abort | 18.2 | 140 | Abort due to TeV proton RF stations |
| 2792 | 30.6 | 105 | Abort | 1.0 | 158 | Aborted due to cryo; bad cryo vacuum |
| 2795 | 22.9 | 496 | Abort | 8.0 | 109 | Aborted due to power glitch 
(lightning on ComEd Northern Ill. grid) |
| 2800 | 30.7 | 670 | Abort | 8.3 | 125 | Abort due to JT valve cycled (quench) |
| 2801 | 25.7 | 1058 | Intentional | 18.7 | 122 | Two lost pbar transfers:
1st due to MI PSLOOP failure; 
2nd unsynchronized sequencers |
| 2803 | 30.5 | 1306 | Intentional | 19.4 | 149 |  |
| 2805 | 8.8 | - | Intentional | - | 165 | Separator spark during lightning |

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Integrated Luminosity for the Week

**Integrated Luminosity for the Week**

- Experiment Access

- Abort: TeV proton stations off

- Experiment Access

- Lightning hits C4 frig building

- C4 recovery (cryo; controls; inst.)

- Abort: cryo vacuum

- Quench during checkout

- Power glitch

- Lost stack

- TeV studies

- Quench: JT valve cycle

- Separator spark and lightning

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## A Summary

- Troubles
- Booster RF vacuum trips, TeV proton RF turning off, A:IKIK, B:Q10, I:Q703 “fire”, lightning strike of C4 frig building, C4 recovery, cryo vacuum, power glitch, pbar instability (lost 60mA), JT valve cycle, lost pbar transfers (MI PSLOOP)
- TeV Beam Maintenance Studies
- Investigated 150GeV lifetime as a function of chromaticities; lattice measurements; reducing current in S6 feed down circuit and orbit
- Some semi-parasitic studies
- Slip stacking started accelerating beam
- SY120 has sent beam to the meson target train
- MI injection damper commissioning;  2.5MHz acceleration; field reset studies

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Slide 5

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Slide 6

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Shot Setup Operational Improvements 

- Shot Setup Review Group
- B. Mau, D. Johnson, operation specialists, crew chiefs
- 30 issues relating to shots and sequencer identified
- Standardize shot setup
- Remove ambiguities
- Remove problematic areas
- Controls (B. Hendricks) is addressing 7 issues
- Expanding sequencer capabilities
- Modifying user interfaces
- Addressing “bugs” in programs
- Mau, Dept Head, Run Coord. to address 5 admin problems
- Sequencer aggregate authors will address 8 issues
- Features; formatting; style; consistency
- Operation specialist will handle remaining 10 issues
- 3 issues resolved. Group is determining best methods for resolving issues and defining standards

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Luminosity Strategy 

- Increase 150GeV lifetime
- TeV work has focused on setting pbar chromaticities to optimum values
- Pbar 150GeV lifetime has improved
- Differential chromaticity leads to non-ideal proton chromaticities
- Proton 150GeV lifetime has decreased
- Studies will be to address/correct differential chromaticity
- Last week studies identified 6 circuits to investigate
- More protons/bunch at low beta
- Proton source is running well...HOT
- Fixing differential chromaticity will improve proton efficiency
- Larger stacks will lead to more pbars to low beta
- Increase pbar cycle rate
- Production is running high (>18e-6pbar/proton on target)
- Run long stores
- Mother Nature & Lady Luck

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03

## Brief Summary

- The week
- Much down time (lightning & glitch induced problems)
- Seven stores of which four aborted and one “not real”
- All initial luminosities < 31e30cm-2s-1
- 74hrs of stores
- FY03 total is 192.9pb-1; 5 weeks to shutdown
- Need 6.4pb-1/week
- Goal for this week
- Stack and Store

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Jul 03