# Presentation: 797191

## Beams Week in Review

- Continued to work on providing Luminosity           **L****  ********N****p**** N****a****/ ******
** **
- Stacking rate
- Coalescing efficiency
- Transfer efficiency
- Emittance preservation

- All Experimenters Meeting

- 19 August 2002

## Beams Week in Review

- Looking Up (8/12 – 8/18)
- Five  stores  with   initial luminosity between 1.8-2.3 E31
- Stacking rate improvements
- Third best week for integrated luminosity
- Store 1678 integrated luminosity 0.979 pb-1
- Accelerators took advantage of unscheduled study time

- All Experimenters Meeting

- 19 August 2002

## Beams Week in Review

| Store # | Initial Luminosity | Duration | Termination | comments |
| --- | --- | --- | --- | --- |
| 1661 | 2.3    E31 | 19.3  hours | intentional | Scraper movement problems, good from Acc |
| 1663 | 1.63   E31 | 1.3   hours | B0 low beta quench | VFC chassis
High humidity? |
| 1665 | 1.99   E31 | 16  Hours | intentional | Collimator FE problems |
| 1667 | 1.82   E31 | 18.2 hours | Intentional w/quench | A0 abort kicker module replaced |

*Store Summary*

- All Experimenters Meeting

- 19 August 2002

## Beams Week in Review

| Store # | Initial Luminosity | Duration | Termination | comments |
| --- | --- | --- | --- | --- |
| 1668 | 2.34   E31 | 27.1 hours | intentional | 8% increase in short arc V helix |
| 1670 | 1.93   E31 | 15.3 hours | Intentional | Large pbar transverse emittance |

*Store Summary, con’t.*

- All Experimenters Meeting

- 19 August 2002

## Peak Luminosity

- All Experimenters Meeting

- 19 August 2002

## Integrated Luminosity

- All Experimenters Meeting

- 19 August 2002

## Tevatron Summary

- Studies included
- Emittance growth vs Flying wire
- Synch light calibration
- Initial data for phasing in transverse horizontal damper
- Investigate onset of transverse instability with lower chromaticity
- Luminosity lifetime vs. vertical helix separation

- All Experimenters Meeting

- 19 August 2002

## Tevatron Summary

- Vladimir Shiltsev

- All Experimenters Meeting

- 19 August 2002

## Pbar Summary

- Concentrated on antiproton production
-    (up from 10-12E-6  to 16E-6 pbars/proton)
- Debuncher RF (12% in production)
- Accumulator ARF1-1 off for stacking
- Phased in Debuncher H & V cooling fan-out and fan-in.
- Production seems to follow DRF1 fan-back voltage  (voltage currently 20% low)

- All Experimenters Meeting

- 19 August 2002

## Pbar Summary 

*Production Rate*

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- 19 August 2002

## Pbar Summary 

*Stacking Rate*

- All Experimenters Meeting

- 19 August 2002

## MI Summary

- Continued Low Emittance (8 GeV) proton coalescing studies
- Pbar beam loading compensation

- All Experimenters Meeting

- 19 August 2002

## MI Summary

- Four bunch pbar coalescing

- All Experimenters Meeting

- 19 August 2002

## Schedule for this Week

- After the Shot today, Pbar Source will enter a 4 shift study period to be followed by stacking for the next HEP store.
- The next store will terminate 0600 Tuesday with and EOS  study to be followed by 4 shifts of Tevatron studies.
- Shot set-up for HEP will resume on evening shift Wednesday.

- All Experimenters Meeting

- 19 August 2002

## Schedule for this Week

- All Experimenters Meeting

- 19 August 2002