# Presentation: 389338

## Weeks in Review: 05/19/03 –06/02/03

**  ****Keith Gollwitzer – FNAL**

- Stores and Operations Summary
- Standard Plots

- All Experimenters' Mtg - 2 Jun 03

## Stores Summary

| Store | Initial
Lum.
(E30) | Deliv’d
Lum. (nb-1) | Termination | Duration
(hr) | Comments |
| --- | --- | --- | --- | --- | --- |
| 2562 | 30.1 | 1086 | Intentional | 17.7 | 112mA Stack; EOS studies |
| 2581 | 6.25 | 98 | Intentional | 6.5 | 99mA Stack; Large pbar losses |
| 2600 | 20.4 | 580 | Intentional | 11.4 | 113mA Stack; Large pbar losses |
| 2604 | 34.4 | 1214 | Intentional | 17.2 | 106mA Stack |
| 2606 | 31.4 | 1062 | Intentional | 15.8 | 106mA Stack |
| 2608 | - | - | Abort | - | 115mA Stack; Quench @ begin of ramp |
| 2614 | 30.0 | 1126 | Intentional | 18.6 | 115mA Stack |
| 2636 | 20.8 |  | On Going |  | 112mA Stack
Store counts for next week |

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## TeV Summary

- Fixes
- T:HE17 Trips that caused quenches
- Bad cable connector inside of relay rack
- Trim power supplies
- LLRF filter to remove 100Hz
- Small tune changes at 980GeV stop pbars from being coherent
- Studies
- 2 studies looking at injection line matching and vertical dispersion
- Lattice measurements at flat-top & low beta
- Tunes as a function of octuple and helix separation
- Confirmed that F0 lambertson is now largest impedance
- Much checkout of ramps (coupling, chromaticity...)
- BPM characterization

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Moving F0 Lambertson

- Coherent

- Beam Current

- Lambertson Position

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Main Injector & Recycler 

- MI studies
- Slip Stacking
- 2.5MHz acceleration
- NUMI multibatch
- Recycler Accesses
- RGA scans to confirm locality of contamination
- Replacement of contaminated vacuum gate valve
- Removal of leaking stochastic cooling tank
- Recycler studies
- Vacuum as function of beam intensity
- RF manipulation and longitudinal emittance growth
- General recovery from access work

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## NUMI Multibatch 

- 84 Booster Bunches 9 Beam   Turns 6 Booster Batches Intensity > 2E13

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Antiproton Source

- Problems
- 2 Lithium Lens replacements
- Most pulses (20 months of service); transformer went bad
- Installation error led to early demise of lens
- Lens water system problems (conductivity cell & valve)
- Bad AP3 shunt caused bad transfers for 2 shots
- Water pump broke  lost stack
- Broke a dipole and 2 quad shunts
- Studies
- Tunes across Accumulator aperture
- Measurement of the Accumulator momentum aperture
- Quad BPM study
- Extraction lattice measurements
- Fast stacking

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Slide 8

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Attempt at Fast Stacking

- Stack cycle from 2.4 to 2.0 sec

- Stack rate remains the same

- Pbar production decreases

- Goal is to increase stack rate
- by shortening cycle time and decreasing ARF1 bucket area.
- The tradeoff: leaving more pbars on injection orbit

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Proton Source & SY120

- Proton Source
- LRF Tubes
- One of BNL spares delivered to FNAL
- LRF5 Rested when possible; has been replaced today
- Back to no spares
- Concern with hot areas of Booster
- SY120
- Three studies periods
- Extract beam on $21 but no evidence of proton beam in P3 line
- See beam spray on P3 multiwires
- Magnet polarities checked during access
- Steering/alignment is suspect

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Narrow in P1 and P2; wide beam in P3

- P1 and P2 wires

- P3 wires

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Study week + shutdown week = average week?

**Study week + shutdown week = average week****?**

- Quench – Beginning of ramp

- Shutdown

- Studies

- Investigation of poor pbar efficiency

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Slide 13

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Integrated Luminosity & Goals

- 	Goal curves were defined in Oct 02

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Slide 15

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03

## Brief Summary

- Two weeks
- Short accesses
- Study Shifts
- Some running and a holiday weekend
- Shutdown
- Recovery
- Goal for this week
- Stack and Store

- K. Gollwitzer - FNAL

- All Experimenters' Mtg - 2 Jun 03