# Presentation: 763187

## Week in Review: 12/23/02 -12/29/02

**  ****Ron Moore – FNAL**

- Store Summary (Stack & store week)
- Loss of Store #2111
- Recycler pbar shots
- Schedule for Week

- All Experimenters' Mtg - 30 Dec 02

## Store Summary

| Store | Initial
Lumi | Deliv’d
Lumi | Termination | Comments |
| --- | --- | --- | --- | --- |
| 2097 | 29.5 | 1299 | Intentional | Horz and vert dampers ON @ 150 GeV; longitudinal damper OFF |
| 2099 | 26.1 | 1147 | Intentional | Lost 1 pbar transfer in A1 line |
| 2103 | 32.9 | 1599 | Intentional | End-of-store studies; aborted with only 4 proton kickers |
| 2105 | 23.7 | 712 | Unintentional | PAK5 improperly fired when expert probing power supply test points |
| 2113 | 31.6 | 1238 | Intentional | F48 quench on abort – all 5 proton kickers fired a tad too soon? |
| 2114 | 30.7 | > 800 | ongoing |  |

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Slide 3

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Slide 4

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Slide 5

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Loss of Store #2111

- Lost during scraping – very fast loss
- 12 house (out of 24) quench + low beta quads
- Lost 25% of helium inventory   $22K
- Cryo vacuum problems at E2 delayed recovery
- N kautzky replaced, tightened clamps on He kautzky
- We don’t understand why we lost store.
- Checked collimators, RF, separators, injection lambertson, kickers, earthquakes
- Fast loss suggests kicker misfire.  Which one and how?
- Not abort kickers, F17 proton injection kicker.
- E48 pbar kicker?  No evidence it did or did not misfire.
- Tev turn-on OK, have had 2 good stores since then

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Tevatron

- Pbar lifetime @ 150 GeV “OK” – lose 3-6%
- Pbar efficiency up the ramp ~20%
- 8-9% is typcially “good”
- Have been making minor adjustments shot-to-shot
- Smoothed vertical orbit last week – little improvement
- Focus during dedicated studies this week
- Transverse dampers ON at 150 GeV
- Longitudinal dampers still OFF
- Maybe put in this week...

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Proton Abort Kicker Scope

**A49 Beam Loss Monitor**

**Proton Abort Kicker Scope**

- 1 sec

- Beam Loss  (rads/sec)

- Fast loss
- < 1  line cycle

- Kicker voltage

- No signal on BPM 
- Beam already gone when abort kickers fire!

-  2 revs

- 100

- .1

- Loss of Store #2111

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## E27 He kautzky after 

- E27 He kautzky after
- 12 house quench

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Recycler Pbar Shots

- 5 shots since last Monday
- Total 117.4 E10 pbars shot from Accumulator
- 77.5 E10 pbars injected into Recycler
- Achieved 80% Acc  MI Recycler efficiency
- Up from 63% earlier
- Better RF matching between Acc and MI
- Acc  MI oscillations now < 1mm in both planes
- Will continue these shots
- After HEP store starts, stack to 30 E10 or for 2 hours
- Stacking for Tev no later than 3 hours after store start

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Slide 11

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Weekly Schedule

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02

## Summary

- Stack & Store Week:  6 pb-1
- Pbar loss up Tevatron ramp still biggest problem
- Loss of store #2111 still not understood
- Continued Recycler pbar shots
- 2.5-3 shifts of dedicated studies this week
- Try to reduce pbar losses up ramp
- Next week: 1 shift shutdown + 5 shifts of studies

- R. Moore - FNAL

- All Experimenters' Mtg - 30 Dec 02