# Presentation: 219035

## Week in Review: 04/14/03 –04/21/03

**  ****Keith Gollwitzer – FNAL**

- Store and Operations Summary
- Standard Plots

- All Experimenters' Mtg - 21 Apr 03

## Store Summary

| Store | Initial
Lum.
(E30) | Deliv’d
Lum. (nb-1) | Termination | Duration
(hr) | Comments |
| --- | --- | --- | --- | --- | --- |
| 2424 | 35.1 | 1486 | Intentional | 18.8 | 150mA Stack, Horizontal damper
Started store last week |
| 2426 | 37.1 | 222 | Abort | 1.8 | 150mA Stack, Horizontal damper
Abort by power supply of small low  quad |
| 2433 | 34.0 | 935 | Abort | 10.8 | 160mA Stack, Both dampers
Abort by power supply control chassis |
| 2436 | 32.8 | 1162 | Intentional | 16.5 | 130mA Stack, Both dampers |
| 2438 | 31.9 | 1230 | Intentional | 18.1 | 150mA Stack,Both dampers,Record Protons |
| 2441 | 34.5 | 1378 | Intentional | 20.4 | 150mA Stack,Both dampers,Record Protons |
| 2443 | 21.5 | 974 | Intentional | 18.1 | 150mA Stack,Both dampers,Record Protons
Separator spark while initiating collisions |
| 2445 | 34.5 | 1326 | Intentional | 18.4 | 150mA Stack, Both dampers
Part of store counted for this week |
| 2447 | 38.25 |  | On Going |  | 150mA Stack, Both dampers
Counts as next week |

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Summary of Problems

- TeV
- Abort due to low  quad power supply
- Abort due to power supply failure on control chassis
- Separator spark
- Proton Source
- B:ORBMP power supply maintenance/repair
- Booster RF; Multiwire *flapping* in 400MeV line
- MI/RR/Pbar/Other
- MI RF station
- Recycler vacuum work competed and investigated
- Pbar Debuncher extraction kicker cable *fried*
- SDA failed to record for a store

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Unscheduled Maintenance & Studies

- TeV Transverse Dampers and Coupling
- TeV Octupoles and stability
- TeV Orbit Smoothing
- TeV FW diagnostic study
- New Helix aperture and lifetime studies
- TeV microwave Schottky were made functional

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Correlation of Quad Trim Power supply and Losses

- Losses

- Power Supply

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Correlation of Quick Orbit Excursions and Losses

- Losses

- Orbit V&H

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## ORBMP work

- Missing SDA store 2433

- Total Integrated Luminosity for the week: **7.1pb****-1**

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Slide 8

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Integrated Luminosity & Goals

- 	Goal curves were defined in Oct 02

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Slide 10

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Many studies and some maintenance

- Many studies and some maintenance

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Tevatron orbit smoothing

- +4 mm

- -4 mm

-  Goal is to keep orbits stable to within ~0.5 mm.
-  Present day orbit is off by ~ 2 mm in some location.
-  Several corrector dipoles are near the 50 Amp limit. (This has interfered with orbit smoothing lately.)
-  Several correctors in close proximity have large but opposite currents.

- Horz

- Vert

- Present orbits in the Tevatron

- From M. Martens and TeV group

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Goal of (this weeks) orbit smoothing

-  We used a “standard” smooth procedure since Nov ‘02.        (This would take ~ 2 hours for a smooth.)
-  Orbits have drifted too far from the nominal since March.
-  Our aim is:
-  Adjust orbit positions to keep beam centered.
-  Reduce strengths in correctors.
-  Adjust tunes after smoothing.
-  Find a “Standard” orbit than can be maintained with ~ 2 hour smooth.

- From M. Martens and TeV group

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03

## Summary

- The week
- 101 store hours
- Bad Luck: two aborts and separator spark
- ORBMP still required attention
- Th,F,Sa stores started with record protons at collisions
- Overall a very good week.
- Goal for this week
- 5 Shifts of studies
- Hope to continue increases in luminosity
- Continue with stable store running

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 21 Apr 03