# Presentation: 683036

## Week in Review: 08/03/03 –08/11/03

**  ****Doug Moehs – FNAL**

- Stores and Operations Summary

- All Experimenters' Mtg - Aug. 11, 2003

## Stores Summary

| Store | Initial
Lum.
(E30) | Deliv’d
Lum. (nb-1) | Termination | Time
(hr) | Stack
Size
(mA) | Comments |
| --- | --- | --- | --- | --- | --- | --- |
| 2859 | 40.9 | 1570  | Intentional | 20 | 151 | High losses for CDF |
| 2864 | 35.7 | 751  | Abort | 8 | 166 | Losses up the ramp, RF Sum noisy |
| 2868 | 37.6 | 1168 | Abort | 13.5 | 134 | 2 bad Pbar transfers, ARF1 off,
AQ7 P.S. Bad card  |
| 2879 | 40.5 | 718 | Abort | 6.3 | 121 | RF Anode Supply, Longitudinal Dampers |
| 2883 | 42.1 | 1314 | Quench | 14.6 | 125 | F48L, 465 card |
| 2887 | 48.8 | .911 | Abort | 7.1 | 163 | Record Initial Luminosity
Lead Failure
 |

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

**Notes:**
Proton qualifiers has been set to 310 to 350
Last 3 shots Total proton efficiency to HEP has been around 60-63%
Last 3 shots Total Pbar efficiency to HEP has been around 68-71%
Zero stacking rate is around 13 mA/ hour

## Integrated Luminosity for the Week

- 2857

- 2859

- 2864

- 2868

- AQ7, Over Volt.

- 2879

- 2883

- 2887

-  Pbar access .S.S.R.

- RF Abort

- Stack lost, QSF1 shunt

- Lead Failure

- Quench F48L Card

- RF Anode Supply, L.D.

- Planned 36X4 study

- AQ49 quench
- Sep. Pol. Switch

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

**Notes:**
Separator, Polarity switch at C:BQ0 replaced after store 2859 which was terminated on shedual
Separator switch at C49 removed after store 2889 quenched up the ramp.

## TeV Studies and Changes

**Increased RF Voltage During the Ramp 3% (60 kV)**
- Continuation of orbit smoothing between stores.
- Aperture scans, found 6 locations where beam was not centered
- Orbit and Tune measurements up the ramp, uncoalesced beam on the central orbit
- Preparation of a new helix using more separators up the ramp.
- A 36x4 store was attempted but a quench occurred around 400 GeV
- New plan:  Start new helix at 400 Gev.
- 36x4 will be attempted again after further study
- Lattice measurements at 150 GeV
- Still need to do orbit measurements at injection

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

**Notes:**
Tevatron lattice measurements are done at different amplitudes of beam orbit offsets for  both positive and negative signs on central orbit only. At injection orbit measurements were not performed due to absent of time. 

## Other Studies

- Recycler
- Coupling measurements
- Emittance growth with bunched beam
- No MI ramp
- With Barrier Bucket
- Antiproton Source
- Bunch Rotation with and without MI beam loading compensation
- Bunch lengths 1.9 ns
- Tune adjustments before shot
- Shot studies
** ****2******** transverse emittance reduction by leaving SEM’s out of AP3 line**
- Main Injector
- Slip stacking
- NUMI multi-batch acceleration
- 2.5MHz acceleration
- SY120 commissioning
- First physic experiments performed using fast extraction

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

**Notes:**
SEM:  Secondary Emission Monitor AP3 line 
Leaving SEM’s out of the transfer line. Believe this reduces emittance growth by approximately 2pi

## Slide 6

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

## Slide 7

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

## Luminosity Strategy 

- large number of particles to low beta
- Objective 240 protons per bunch to low beta
- Proton Source running well with high coalescing efficiency
- Objective shoot from 170 mA stacks
- Larger stacks associated with longer stores, approximately 20 hr.
- Average 140 store hours per 2 week period
- Studies
- 4 Hours of dedicated TeV studies every 2 stores or when a store is lost
- Helix commissioning (ongoing)
- ‘	Injection Matching (ongoing)
- Semi-Parasitic studies to continue
- After 120 mA
- 20% of the timeline
- Refining Accumulator to MI Pbar transfers
- Once 225pb-1 (by August 27)
- incorporated addition study time into the schedule

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

## Brief Summary

- A week of short stores
- Record Pbars at low beta; 1050 E9  (2887)
- Record initial luminosity of 48.8 E30 (2887)
- Proton qualifier is set between 310 to 350
- Last 3 shots total proton efficiency to HEP has been 60-63%
- Last 3 shots total Pbar efficiency to HEP has been 68-71%
- Zero stacking rate is around 12 mA/ hour
- All average initial luminosities > 35e30cm-2s-1
-  >70 store hours
- FY03 total is 215.6 pb-1; 2 weeks to Aug 25
- Need 4.71 pb-1/week, down from 5.4pb-1 last week
- Goal for this week
- Stack and Store

- Doug Moehs (Proverbs 16:3)

- All Experimenters' Mtg - Aug. 11, 2003

**Notes:**
Proton qualifiers has been set to 310 to 350
Last 3 shots Total proton efficiency to HEP has been around 60-63%
Last 3 shots Total Pbar efficiency to HEP has been around 68-71%
Zero stacking rate is around 13 mA/ hour