# Presentation: 616251

## Proton Team (“Finley Report”)

- Group formed in early 2003 to study proton demands and needs for the “near” future (through ~2012 or so), in the absence of a proton driver.
- Work culminated in a report to the director, available at www.fnal.gov/directorate/program_planning/studies/ProtonReport.pdf
- No big surprises [see P. Kasper “Getting Protons to NuMI (It’s a worry)”, 2001].
- This work will form the basis of “The Proton Plan”.

## Proton Demand

##  Demand: Summary

- Pbar production
- current: 0.9E16 p/hr
- Max (slipstacking): 1.8E16 p/hr
- MiniBooNE
- current:  ~3.5E16 p/hr
- Request: 9E16 p/hr [5E20 p/yr]
- NuMI
- Baseline: 4.5E16 p/hr [2-2.5 p/yr]
- Exotic loading schemes (~2006): ~7E16 p/hr [4E20 p/yr]
- Occasionally claim: 14E16 p/hr [8E20 p/yr]
- 2005
- Max pbar + MiniBooNE + baseline NuMI: ~16E16 p/hr (~4 times current limit!)

-    What MINOS believes they are getting

## Formulating a Plan

- The lab has recognized that the proton demands of the experimental program are significant, if not daunting, and will require substantial efforts to meet.
- As the financial burden of Run II begins to ease, it’s envisioned that financial resources will be diverted to these efforts over the next few years.
- We are in the process of putting together a plan with the maximum likelihood of reaching these goals.
- Ultimate goal is to generate a project similar to Run II
- However, because the future (MiniBooNE) is already here, such a plan will necessarily have near and long term components.

## Near Term Priorities (Booster)

- Optimizing Booster for improved lattice:
- Tuning and characterizing 400 MeV line (Linac to Booster).
- Tuning Booster orbit to minimize losses.
- Commission Collimators:
- Once we have Booster optimized to the new lattice, we will begin to exercise the collimator system.
- Estimate about 2 months to bring into standard operation.
- Aperture Improvments:
- Alignment
- Complete (magnet) vertical network done over shutdown
- Will analyze and effect moves when opportunities arise
- Working on a systematic method for aligning straight sections.
- Orbit control
- Ramped orbit control program has been written.
- Will be commissioned soon (new personnel)
-  Important now that collimator is in place.
- Prototype RF Cavities
- Two large aperture prototype cavities have been built, thanks to the help of MiniBooNE and NuMI universities.
- We will install these as soon as they are ready to replace existing cavities which are highly activated.
- It’s hoped this work will allow us to reach the MiniBooNE baseline this year.

## Issues over the Next Year

- Linac Characterization and Reliability
- Increase instrumentation of old linac to study instabilities.
- Develop set of performance parameters.
- Booster improvements.
- Prepare for modification of second extraction region
- New septum
- Modified dogleg magnets
- On track for next year’s shutdown.
- Injection Bump (ORBUMP) Power Supply
- Existing supply a reliability worry.
- Limited to 7.5 Hz
- Building new supply, capable of 15 Hz.
- Aiming for next year’s shutdown.
- Under consideration: New ORBUMP Magnets
- Existing magnets limited by heating to 7.5 Hz
- Working on a design for cooled versions.
- These, with a new power supply, will make the Booster capable of sustained 15 Hz operation.
- Biggest decision for the near future.

## Long Term, Big $$ Ideas Under Consideration

- New Booster RF system: (~$15M)
- Larger aperture cavities (two prototypes will be installed soon).
- New solid state preamps and modulators (would pay for itself in a few years).
- New Linac front end: (~$30M)
- Replace Preac and 200 MHz linac with RFQ feeding 400 MHz klystron-driven linac.
- Addresses 7835 Amplifier Tube Problem
- Possible part of proton driver?
- Reduce Main Injector ramp time: (??)
- Still needs time to load protons
- Needs to fit in with stacking.
- Necessary to get the kind of protons that off-axis is talking about.

## The 7835 Power Triode – Our BIG Worry 

- Very complex technology
- RF, material science, vacuum, chemistry
- Similar to other tubes made by Burle
- 4617
- 7835 only used in the scientific community.
- One military user for 4617
- Quality varies from decade to decade
- Can we rely on these until proton driver?
- Might feed into linac decision.

## Budget Guidance (courtesy S. Holmes)

- FY04 ~$2M (but I’ve already been told it’s not there)
- FY05 ~$6M
- FY06 ~$5M
- Scale of $5M/yr after that
- This money, *if* it exists, is fairly well tailored to a new Booster RF system.

## Formulating a Structure (partial example)

- Protons

- Linac

- Booster

- Main Injector

- Instrumentation and Characterization

- Reliability

- Aperture

- Alignment

- Beam Control

- RF

- RF

- Multibatch Schemes

## Some Comments

- We need to get started soon on a lot of this stuff, so I don’t want to get bogged down in the “process”.
- At least as far as the Booster and Linac are concerned, tasks are divided into no-brainers and big-ticked items which depend on the appearance of large amounts of money.
- I’d like to have a reasonably complete WBS by the end of February.
- When there is overlap with Run II, leave it in run II (example: Booster cogging).