# Presentation: 062956

## Pre-shutdown Proton Source Status

- The proton source typically delivers about 5.2E18 protons per week
- .7E18 (13%) for Run II (pbar production)
- 4.5E18 (87%) for MiniBooNE
- This is about 40% of the MiniBooNE request
- This number is limited by uncontrolled losses in the Booster.
- The initial NuMI request (~1/05) will be about half the MiniBooNE request, and will rise somewhat of the next few years.
- -> To run MiniBooNE and NuMI together, the Proton Source must deliver *about four times what it delivers now.*
- So, what are we going to do about it??

## Major Proton Source Shutdown Projects (with total time)

- New Linac Lambertson (2.5 weeks)
- Will improve 400 MeV line optics and reduce losses.
- Status: in place; aligned today; being reconnected.
- New Collimation System (2.5 weeks)
- Will reduce uncontrolled losses.
- Status: Collimators in place and cabled.  Working on vacuum pipe.
- Rearrange Long 3 extraction region (1 week)
- Will significantly reduce lattice “dogleg problem”.
- Status: waiting as long as possible for cooldown.
- New wide aperture (EDWA) magnets at beginning of MI-8 line (4 weeks)
- Will reduce above-ground radiation.
- Status: wires and beam pipe disconnected.  Begin magnet removal tomorrow.

## Shutdown Projects (cont’d)

- 2 (of 18) prototype wide aperture RF cavities (2 days)
- Aperture goes from 2 1⁄4” -> 5”.  Should reduce losses and activation.
- Status:  Hopefully be ready for installation during the week of October 27th.
- New Long 13 septum power supply
- Preparation for new septum & dogleg fix
- Status: Power supply in place.  Cable pull soon.
- Booster vertical alignment (1 week + 1 week)
- Hopefully solve known alignment problems.
- Status: trying to complete vertical network.

- Radiation exposure a major worry on almost all jobs!!

## Long 3 Dogleg Work

- Move Septum

- Stretch out dogleg pairs

- Should dramatically reduce lattice distortions caused by doglegs

## Collimation System

- Primary Collimation foils

- Secondary absorbers w/shielding

- Tertiary absorber

## Proton Source Shutdown Schedule

| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
| --- | --- | --- | --- | --- | --- | --- |
| Sept. 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15
 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | Oct. 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |

- Lambertson (LInac Tunnel)

- Lambertson (LInac Tunnel)

- Lambertson (LInac Tunnel)

- Collimators (with ironworkers) – ***Assumes collimators have been assembled in access bay!***

- Collimators (ironworkers move to EDWA installation)

- EDWA Installation

- EDWA Installation

- EDWA Installation

- EDWA Installation

- Dogleg Modification at Long 3

- BOOSTER OFF- Cool down and miscellaneous prep work

- Prep L6 and L3 for collimator placement

- Linac up

## Shutdown Schedule (cont’d)

| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
| --- | --- | --- | --- | --- | --- | --- |
| Oct. 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | Nov 1 |
| 2 | 3
 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |

- Install Prototype RF Cavities

- Commissioning and Studies..

- Commissioning and Studies. Possible weekend extraction tests.

- Return to normal operation

- Vertically align Booster

- Test MI-8Extraction

## Startup Plan and Projections

- The current plan has two full weeks of studies and commissioning prior to the startup of the complex.
- New Long 3 arrangement should be similar to studies done in February -> we achieved record performance with 36 hours of tuning.
- Saw improvements from prototype collimation system during limited tests.
- Expect to come out of shutdown “better” than we were before the shutdown.
- We project 2-3 months to fully optimize new lattice and commission collimators.
- Learn optimum operating modes
- Establish new beam loss protocols (current system invovles counting lost protons -> won’t work with collimators)

## Extraction Commissioning

- Plan to secure the MI and extract beam to MiniBooNE weekend of October 25th-26th (end of week 7)
- Based on the success of that weekend, reserve option to test extraction on subsequent weekends.
- Plan to come out of shutdown with the new extraction more or less fully operational.

## Collimator Commissioning

- General procedure
-  move the three secondary collimators in until they begin to attenuate the beam
- back them out slightly.
- Adjust the positions of primary collimators to minimize uncontrolled loss per proton.
- Safety considerations
- One of our current limits (power loss), works by counting lost protons and weighting by energy.
- This will not work with collimators.
- We will need to establish much tighter limits on individual loss monitors.