# Presentation: 875240

## General Review Impressions

- My opinion is that the review went very well
- Both in public and in private, the reviewers were very impressed with the progress in the last year
- Highlights:
- Completion of 7835 order and subsequent descoping of propose Thales test facility.
- Successful completion of major shutdown projects, particularly the two big Booster jobs
- Progress on corrector prototype
- Significant increase in understanding of the Main Injector RF and beam physics issues
- Management and tracking
- Some comments struck people as “cranky”, but remember that constructive criticism is the job of the review committee
- Total of 27 recommendations
- 6 Linac
- 8 Booster
- 4 Main Injector
- 6 Management
- 3 Cost and schedule
- Obvious things, or things we were doing anyway are marked in green (~12)

## Linac Recommendations

- It is important that enough resources are allocated to fully test and characterize twelve 7835 tubes. Even with warranty provided by Burle, it is important to test these tubes to determine early problem associated with fabrication and performance specifications.
- Repair of the 7835 test stand power amplifier should proceed with priority so that the testing of tubes can resume and the nature of the failure can be understood and standard repair procedures can be worked out.
- The work on QPS control cards is essential to be given higher priority to proceed on a reasonably fast track. This work seems to have slowed down due to lack of adequate manpower
- Design effort should also be dedicated to come up with an acceptable design for the timing card. This also seems to suffer from lack of adequate manpower.

## Linac (cont’d)

- Perform consistent linac beam measurements and characterizations to quantify beam energy spread, and transverse emittance variations due to magnetic elements under different linac settings. This needs to be done in collaboration with machine physicists with the required booster beam parameters at the injection.
- Based on the model, which is 99% complete, take the decision about the cavity amplitude and phase regulation architecture and proceed with design. Decide if direct rf feedback is realizable (in light of the drive saturation of the 7835s) and called for, or if feedforward is sufficient and cost effective. Consider if shot-to-shot adaptive feed forward, as opposed to beam current feedforward, is applicable.

## Booster

- Develop an installation plan and in-situ field test for the new correction elements to verify the proper connections.
- Strengthen accelerator physics efforts to guide the implementation and commissioning of the correction systems. In particular with respect to tune and resonance control, utilize the experiences of other accelerators, both in performance and calculations, to aid in this effort. Develop a commissioning plan for the new correction elements.
- At the next review, present the status of accelerator physics calculations for the injection process and for tune and resonance control.
- At the next review, present the status of Booster beam performance (intensity and losses) with comparisons to prior years (pre- and post-2006 shutdown).

## Booster (cont’d)

- Pursue the gamma-t beam studies over the course of the next six months and firm up the decision on the implementation of the gamma-t system. Use available codes to continue the modeling of transition crossing, including momentum aperture limitation, chromatic nonlinear effect, space charge and impedance induced bunch mismatch, microwave instabilities, and electron cloud.
- Monitor the progress of the Booster chopper by presenting its status at PMGs as needed (approx. every three months?).
- As requested at last year’s review, consider implementing RF feedback and beam loading compensation in the Booster to improve stability of bunch rotation required for slip stacking as well as reducing the RF power requirements associated with paraphrasing.

## Booster (cont’d)

- Until improved stability of Booster RF during the bunch rotation process has been achieved by RF feedback, consider implementing the required matching of the Booster bunches to the MI slip stacking by gradually building up the quadrupole motion of the bunch by modulating the RF amplitude with twice the synchrotron frequency for a few synchrotron periods prior to extraction. This avoids the use of very low voltages in the Booster.

## Main Injector

- Continue studies of MI 2+9 batch operation at high intensity to fully understand and remedy capture losses
- Present a detailed plan for the MI ring collimation studies, design, fabrication, installation, and commissioning as soon as possible to permit installation in the 2007 shutdown.
- Address and decide upon the MI RF upgrade CR’s as soon as possible.
- Continue machine studies related to possible e-cloud effects and compare with simulations based on realistic data from SEY measurements.

## Management

- Provide additional detail when reporting on the status of follow-up activities associated with the recommendations from the August 2005 Director’s review.  For the longer duration tasks, status information should include an indication of priority, detailed statement of work actively being performed, and target completion dates.
- Provide a similar level of detail when providing progress status on recommendations from the 2006 review.
- Update the project plan and scope of work to account for the resources required to address and close the recommendations from the August 2005 review.  This represents real work with potential impact on the resource loaded schedule.

## Management (cont’d)

- Process pending Change Requests soon in order to factor the impact into the next round of schedule and cost forecast updating.
- Flesh out the remaining work on developing subprojects and update the project schedule file with this information: (e.g., Linac LLRF, Gamma T magnets, booster chopper, MI collimation, extraction kicker mods).  Task durations should be limited to two months or less in order to properly measure progress.
- Assertively pursue resources to fill missing personnel slots (e.g., support for the management of the Corrector Systems Upgrade, RF engineering, tech to test QPS control cards).

## Cost and Schedule

- The remaining long duration tasks (i.e. greater than 2 months in duration) should be broken down into shorter duration detailed activities.  This will help improve the accuracy of estimating resources and reporting progress.  An alternative to breaking down the long duration activities is adding milestones that reflect interim deliverables that will indicate progress is being made to complete the long duration task.
- A WBS Dictionary description should be completed for the remaining tasks.  This will better define the work to be accomplished, which improves the accuracy of estimating the resources needed to complete the work and gives the people assigned to the tasks a better understanding of what the deliverable is.
- The committee recommends that the Proton Plan analyze the critical and near critical path activities to determine what activities can be crashed to gain schedule contingency for the work scheduled to be performed in the 2007 and 2008 shutdowns.