# Presentation: 191798

## Week in Review: 07/21/03 –07/28/03

**  ****Keith Gollwitzer – FNAL**

- Stores and Operations Summary
- Standard Plots

- All Experimenters' Mtg - 28 Jul 03

## Stores Summary

| Store | Initial
Lum.
(E30) | Deliv’d
Lum. (nb-1) | Termination | Time
(hr) | Stack
Size
(mA) | Comments |
| --- | --- | --- | --- | --- | --- | --- |
| 2810 | 31.65 | 1362 | Intentional | 22.7 | 129 | Ran long due to lost stack |
| 2813 | 31.64 | 1320 | Abort | 19.7 | 136 | Fridge I/O power supply fuse failure
led to quench |
| 2815 | 38.63 | 1499 | Abort | 17.3 | 169 | TRF8 water heater fuse failure
led to vacuum problems- trip RF stations |
| 2817 | 42.64 | 1824 | Intentional | 20.6 | 160 | Most integrated luminosity for a store |
| 2821 | 40.44 | 1702 | Intentional | 20.2 | 162 | High losses at beginning of store
TeV End of Store studies |
| 2824 | 45.34 | 1465 | Abort | 14.5 | 172 | Highest TeV initial luminosity
E2 fridge problem led to quench |
| 2826 | 37.11 | - | On-Going | - | 164 | Fewer protons out of source
Counts as next week |

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Integrated Luminosity for the BEST Week

**Integrated Luminosity for the BEST Week**

- Experiment Access

- Experiment Access

- Experiment Access

- TeV Studies

- TeV Studies

- TeV End of Store  Studies

- Quench during 36x0 Abort

- Quench due to frideg at E2

- Abort: RF fuse failure

- Quench due to Frideg fuse failure

- Lost Stack due to bad interlock relay

- 31.65e30

- 31.64

- 38.63

- 42.64

- 40.44

**45.34**

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Troubles

- Booster RF vacuum trips
- Interlock relay failure in pbar system dropped stack
-  pbar tunes after accessing need adjusting
- HT848 PS in 8GeV beam line
- Caused trips especially on MiniBooNE losses
- Booster VBC PS water hoses cleared
- Murky water caused over heating of PS
- Fuse failures
- Fridge I/O crate and
- TeV RF water heater system...led to beam pipe vacuum
- Heat load on E2 fridge
- Leaky Kautsky valve and/or
- Bad cryo vacuum

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## TeV Studies and Changes

- Reduction current in S6 feed down circuit
- Increase pbar lifetime at 150GeV
- Decrease of differential chromaticities
- Increase pbar and proton lifetimes at 150GeV
- Continuation of orbit smoothing between stores
- Slight increase of separator strength
- Separator scan of interaction regions
- Small changes in Dzero
- Small tunes changes near top of ramp and store
- Decrease losses
- Change of TeV injection energy
- Increase pbar injection efficiency
- Commission/debug
- proton BLT
- Chromaticity measurment method
- Trim quads for making beta function measurements

***These have led to more particles to low beta***

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Other Studies

- Slip stacking
- Capture efficiency
- Accelerating beam
- NUMI multibatch
- 2.5MHz acceleration
- SY120
- Beam to Meson Target Train
- Work to deliver beam to MTest
- Pbar Debuncher momentum cooling
- 8GeV reverse proton lattice measurements
- MI8 beam line lattice measurements

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Slide 7

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Slide 8

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Luminosity Strategy 

- Keep the large number of particles to low beta
- Most of the time proton source is running well
- Larger stacks due to longer stores
- Mother Nature & Lady Luck have been our side this last week
- Still trying to increase pbar cycle rate
- Production is running high (>18e-6 pbar/proton on target)
- Now trying to decrease the effective emittance of the beam
- TeV injection matching (between store studies will be needed)
- Refining Accumulator to MI pbar transfers
- Goal is still 225pb-1 ASAP
- Once goal is achieved will incorporate some dedicated beam studies into the weekly planning

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03

## Brief Summary

- The week
- Best week for integrated luminosity
- Largest integrated luminosity for single store
- Highest initial luminosity to date 45.34e30cm-2s-1
- All initial luminosities > 31e30cm-2s-1
- 115hrs of stores
- FY03 total is 202.7pb-1; 4 weeks to Aug 25
- Need 5.6pb-1/week
- Goal for this week
- Stack and Store

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 28 Jul 03