# Presentation: 890461

## Accelerator Status 

-  Performance Statistics Since September 1, 2000
- Weekly Hours
- Stacking Performance
- Luminosity Performance (Store 1716 – 1808)
- Reliability
- FY02  Integrated Luminosity > 20 pb-1
- Luminosity Goals for October 1, 2002
- Initial luminosity of 4E31
- Obtained  Initial 3.02E31
- Integrated 5 pb-1 / week
- Obtained Week 4.79 pb-1 / week
- Goals for November 1st
- Initial luminosity of 4E31
- Integrated 5 pb-1 / week
- Integrate 20 pb-1 for the month of October

- Run II Strategy Group                      4 October 2002

- David Johnson

## Issues Presently being addressed (Tevatron  partial list)

- Near term investigation of high losses at the beginning of the store
- Before the last store, the orbit was smoothed up the ramp and through the squeeze.
- Tunes and coupling adjusted up the ramp and through the squeeze (1st order)
- Injection closure into the Tevatron (BLT)
- – pbar system operational, proton system being developed
- Lattice Matching into Tevatron (proton & pbars)
- – fourth attempt made and effect being evaluated
- Tevatron Tune and Coupling Drift – operational
- Tevatron Transverse Dampers –
- horizontal in use...lowering chromaticity and turning on damper shows increased proton and pbar lifetimes at 1500 GeV
- Vertical remains under development

- Run II Strategy Group                      4 October 2002

- David Johnson

## Issues being addressed (MI, partial list)

-  Coalescing improvements
- Main Injector pbar beam loading compensation
-  operational... average pbar coalescing efficiency shot 1823 was 84% (95% to 65% /transfer
- Operational optimization (timing, phasing,voltages)
- Bucket area matching at injection for pbars
- Preliminary data taken, initial adjustments made, and data being analysed
- Reduction of longitudinal emittance during coalescing (protons and pbars
- MI longitudinal instability leading to longitudinal growth –under investigation
- Bunch length reduction on the $29 stacking cycles

- Run II Strategy Group                      4 October 2002

- David Johnson

##  Issues being addressed (Pbar, partial list)

- Recent Activities

- Future Focus

- Stacking Record 12.43 mA/hr

**Stacking Rate**
- Debuncher momentum cooling optimization
- Debuncher/AP2 aperture (5 shifts)
- Core momentum cooling phasing
- Target studies
**Shots**
- Return to stacking lattice
- Gating stabilizing RF during shots

-   Centered DRF2 on cooling arrays
-  Install new bandpass filters for
-       momentum  bands 3 & 4
-  Gain balanced all arrays

- Run II Strategy Group                      4 October 2002

- David Johnson

## Issues being addressed (Recycler, partial list)

- Last Month
- Implementing closure for reverse protons from RR to MI ( R22) which required 53 Mhz on the Recycler cavities
- Revising RF curve manipulations for stacking pbars
- Revising sequencer commands required tor reverse proton tune up and pbar injection and stacking.
- Investigation on longitudinal emittance evolution in barrier buckets
- Current status
- Stacking efficiency > 80%
- Lifetime > 100 hrs
- Goal For November
- Stack > 200E10 with a lifetime > 100hrs
- Extract pbars to MI and accelerate with efficiency > 80%

- Run II Strategy Group                      4 October 2002

- David Johnson

## View for the Next Month

- Alternating weeks of “stack ‘n store” and dedicated Collider studies.
- Shot strategy:
- Pbar stacks 120 to 150 mA
- Proton bunch intensity – push toward 200E9 at low beta
- Work on efficiency and lifetime
- As previously, take advantage of “no stack –no store” periods for studies while building up stack.
- Dedicated studies to focus on boosting initial luminosity and luminosity lifetime, stacking rate, near term reliability and longer term physics issues.
- Focused studies between store termination and shot set up
- Support Recycler Integration and MiniBoone

- Run II Strategy Group                      4 October 2002

- David Johnson

## Reliability 

- Run II Strategy Group                      4 October 2002

- David Johnson

## Weekly Hours

- Run II Strategy Group                      4 October 2002

- David Johnson

## Status on Luminosity Parameters

|  | Run IIa 
Goals | Average
Since 8/1 | Best
Since 9/1 |
| --- | --- | --- | --- |
| Stacking rate (E10/hr) | 18 | 6.3 | 12.43 |
| Pbar stack (E10) | 165 | 120 | 165 |
| Pbar xfer eff to low beta | .80 | .42 | .6696/.27135 |
| Pbars/bunch (E9) | 33.0 | 12.2 | 17.1 |
| Protons/bunch (E9) | 270 | 176 | 187 |
| Emit* at low beta (mm-mr) | 17.5 | 16.7 | 13.2 |
|  FW Emittance (pbar) | -  | 20.1  | -  |
| Initial Luminosity | 8.3 | 1.95 | 3.15 |

- Run II Strategy Group                      4 October 2002

- David Johnson

## Issues being addressed (Pbar, partial list)

- Improve Stacking
- Production Efficiency
- Debuncher momentum aperture
- AP2-Debuncher transverse aperture
- Debuncher transverse cooling
- Rate
- Understand Debuncher momentum cooling limitations
- Decrease bunch length on target
- Target Studies
- Investigation of Inconel target material

- Run II Strategy Group                      4 October 2002

- David Johnson

## Stacking Performance

- Recent Activities

- Future Focus

- Stacking Record 12.43 mA/hr

**Stacking Rate**
- Debuncher momentum cooling optimization
- Debuncher/AP2 aperture (5 shifts)
- Core momentum cooling phasing
- Target studies
**Shots**
- Return to stacking lattice
- Gating stabilizing RF during shots

-   Centered DRF2 on cooling arrays
-  Install new bandpass filters for
-       momentum  bands 3 & 4
-  Gain balanced all arrays

- Run II Strategy Group                      4 October 2002

- David Johnson

- Run II Strategy Group                      4 October 2002

- David Johnson