# Presentation: 177367

## Proton Plan Status June Report

- Eric Prebys

## Agenda

- Operations  – Prebys
- Technical Status/Director’s Review - Prebys
- Cost/Schedule Report – Prebys (for Sims)

## Operations

## Operational Issues

- Booster
- Booster turn-on has been slower than anticipated
- Tuning for larger batch sizes
- Approaching anticipated intensities
- NuMI
- NuMI horn bead problem has caused significant down time
- Essentially no possibility of reaching either the design or base curve for the FY
- MiniBooNE
- “Malum quidem nullum esse sine aliquo bono”*

- *”There is surely no evil without something good”

## NuMI FY06

## MiniBooNE FY06

## Total Protons

## Technical Status/Director’s Review

## Significant Activity Since Last PMG

- Linac (1.1)
- (1.1.2) Quad Power Supply
- PO out for second replacement card
- (1.1.4) Linac LLRF
- Many important measurements made during the shutdown
- Modeling nearly complete
- (1.2) Booster
- (1.2.1) Determine booster rep. rate
- Ready to schedule high rate test of Booster (9-10 Hz).
- (1.2.3) New Corrector System
- Tests of prototype proceeding
- No obvious problems
- Improvements to stacking fixture to improve core alignment
- (1.2.5) gamma-t
- Studies have uncovered some unusual behavior at transition, which is being investigated
- (1.2.9) SS RF Upgrade
- Decision made to descope from Proton Plan and treat as a maintenance replacement out of operating funds.

## Activity (cont’d)

- (1.3) Main Injector
- (1.3.2) MI Collimation Systems
- Paperwork nearly ready to use MI-8 collimator
- Conceptual review of ring collimation scheme took place 6/29 (V. Shiltsev, chair)
- Impressed by modeling effort
- Recommended proceed with two stage scheme over single stage w/ dispersion modification.

## Preparing for Director’s Review

- Tentative review agenda set
- Still might tweak some times after practice talks
- Review highlights
- Shutdown projects
- Booster corrector system
- Main Injector modeling
- Projections
- Preparing for the review has become the focus of our Proton Plan meeting
- Increased meetings to weekly from bi-weekly
- Finalizing parameter list (requested at last review)
- Updating responses from last year’s recommendations.
- Will have first practice talks next week
- Prebys
- Berenc
- Drennan

## Review Agenda

## Proton Projection Revisions

- Batch size
- Old scheme used one batch size with low “efficiency” for slip stacked batches
- Accurate but confusing
- New scheme will have two explicit batch sizes
- Uptime
- Biggest factor in NuMI beam delivery
- Old scheme had only small variation between design and base
- New scheme:
- NuMI “base” will be uptime from turn-on through shutdown
- BNB will budget 1 unscheduled horn replacement every two years
- Post shutdown turn-on
- Historically tried to cover this by using a projection shutdown longer than actual shutdown
- Real shutdown always extended to same length
- Still looks bad
- New scheme:
- Post shutdown exponential ramp up with (tau ~2 weeks)
- Peaks vs. averages
- Either way elicits strong reactions from people
- Will include both with clear explanation
- Bottom line:
- Only the post-shutdown turn-on will affect design curve (slightly)
- Lower uptime will reduce the base curve.