| Accelerator Physics |
| 1 |
Continue to give high priority to experimental benchmarking of the
computer codes used to model the injector |
| 2 |
Pursue experimental investigation of bunch compression and its comparison
to theory |
| 3 |
Continue to develop tolerance budgets and optimize the performance by use
of start-to-end simulations |
| 4 |
Study SASE output versus electron bunch charge to investigate the
possibility that LCLS performance goals can be achieved for charges lower than 1 nC |
| Injector and Linac |
| 1 |
Establish a resource-loaded schedule for the PED by September 2002 |
| 2 |
Establish a realistic spares list and include in Other Costs of other
appropriate area by September 2002 |
| 3 |
Include support for the required injector scientist activity in the
commissioning plan by September 2002 |
| 4 |
Move forward with laser prototyping as early as budget permits. Include
planning by next review |
| 5 |
Move forward with prototyping the gun as early as budget permits. Include
in planning by next review |
| 6 |
Perform prototyping and design validation tests on the GTF test stand,
integrating as many of the injector components as possible before final integration on the
injector linac. Include in the TPC. FY02-FY03. |
| Undulator |
| 1 |
Designate a senior team leader for the LCLS undulator system from within
APS whose primary responsibility is to carry forward to successful completion the system
before September 2002 |
| 2 |
Develop a resource-staffing plan prior to expenditure of PED funds to
meet the requirements during PED design phase by July 2002 |
| 3 |
Decide on the undulator procurement approach by September 2002. This must
include who, national lab or industry, will be responsible for what portions of the
design, fabrications, measurements, etc. The approach during the preliminary design phase
is different depending on the approach. |
| 4 |
Complete a thorough engineering and production analysis of the undulator
mechanical design. Trade offs on the choice of strongback materials, thermal compensation
and phasing control, physical tolerances, and relationship between stringent tolerances
and post-assembly tuning must be completed. This is to be completed prior to submitting
for bid any long lead procurement. |
| 5 |
Focus the second undulator prototype on addressing mass production
issues. The design and technical approaches are sufficiently advanced that production
issues are the most urgent. If a second prototype is pursued, this recommendation must be
completed prior to CD-3. If industrial production is selected, the second prototype should
be produced in industry. |
| 6 |
Build and field a complete prototype subsystem consisting of an undulator
(the existing prototype is adequate), vacuum chamber, a short diagnostic/focus section,
and a long diagnostic/focus section. This should include the electron beam diagnostics and
x-ray beam diagnostics. This is to be completed prior to CD-3. |
| 7 |
Assess and ensure that the allocation of the total impedance budget
throughout the undulator is complete before CD-2. Specifically, the cavity BPM, x-ray
diagnostics, and Cerenkov detector disruptions will impact the allocated impedance of the
system. |
| Installation and alignment |
| 1 |
Continue to optimize the approach for minimizing installation
interference with linac operations for other programs. Incorporate plan for injector
commissioning with installation of other systems. By next review. |
| Photon Beam Handling Systems |
| 1 |
Increase R&D in the damage area as much in advance as possible before
experiments take place. At the same time calculations of optical component performance
must also be pursued. |
| 2 |
Increase communication with undulator x-ray diagnostic group. |
| 3 |
Increase R&D to measure temporal resolution, achieve pulse timing,
and measure pulse chirp. |
| 4 |
Ramp up additional staff with laser expertise on the project at SLAC for
commissioning. |
| 5 |
Include laser specialists and experienced synchrotron radiation
users/beamline designer as an integral part of the advisory committee. Consider renaming
the Machine Advisory Committee to Facility Advisory Committee. |
| 6 |
Evaluate the shielding requirements for the connected tubes and other
elements. |
| 7 |
Assess contingencies based on individual component risk analysis. |
| 8 |
Incorporate lessons learned from 3rd generation light sources for
developing optical component specifications and beamline component design. |
| Control Systems |
| 1 |
Consolidate the controls effort under one organizational entity within
the LCLS Division. Consider consolidation of the controls WBS elements as well. |
| 2 |
Centralize at SLAC the design and development of "global"
systems, including timing, Machine Protection System and network. Establish standards for
naming, technical database and appropriate hardware and software to be applied across the
Project. |
| 3 |
Initiate discussions with LLNL to understand the interface requirements
between the x-ray control systems and the accelerator control systems. (Communication with
the Undulator controls team at Argonne has already been initiated). |
| Conventional Facilities |
| 1 |
Develop, document and control the top level System Design Requirements
for the CF to ensure that the Conceptual Design Report and estimate are adequate by July
1, 2002. |
| 2 |
Further define System Design Requirements by the completion of Title I. |
| 3 |
Augment the CF team with more experienced individuals; assign the CF team
directly to the LCLS Project Team prior to the start of the Title I development. Engage
additional consultants as required to augment the CF Project Manager to develop cost
estimates, schedules, and other plans during Title I. |
| 4 |
Develop a Procurement Plan for the CF work and identify approaches and
schedules for civil construction facilities prior to Title I. |
| 5 |
Perform the geotechnical/biotechnical survey now, with the final report
due no later than 9/1/02. |
| 6 |
Revise the project schedule to perform Title-I design of the CF in
concert with the rest of the project, but not later than CD-2. |
| 7 |
Revise the allocation of contingency to approximately 30%. this is due to
the lack of detail in the CDR. As more detail is developed, the contingency should be
reduced commensurately. |
| Cost and Schedule |
| 1 |
Cost estimates need to address the committee's concerns - Reevaluate
project contingency - especially in conventional facilities |
| 2 |
Develop a TPC that includes updated TEC and details OPC includes R&D,
Capital Equipment, Commissioning, etc. |
| 3 |
Develop a schedule with critical path including resources to provide
support and verify assumptions
- Staffing levels
- Funding Profiles
- Cost estimates
|
| Project Management |
| 1 |
Documentation
- Conventional Facilities part of CDR needs more detail
- Acquisition Execution Plan must be revised per recommendations
- Project Execution Plan must be revised and completed to support CD-2 by July 2002
|
| 2 |
Risk Assessment
- Do a more quantitative risk assessment
- Create a plan that describes actions that could be taken to mitigate the high level
risks that have been identified and then re-evaluate the contingency and schedule to take
account of their potential impact and likelihood.
|
| 3 |
Commissioning and Operations
- LCLS should begin the coordination with the Technical and Research Divisions for
compatible operations of the linac for HEP and of the LCLS during commissioning and
operation of the LCLS.
|
| 4 |
Management of the Science Program
- LCLS, SSRL and SLAC management need to define the advisory process for scientific input
both on the experimental proposals and on LCLS design by January 2003. As part of this
definition, they will need to determine the reporting structure for the SAC and/or other
scientific advisory committees
- SSRL will need to plan for the expanded range of activities involved in constructing and
operating experiments for LCLS.
|
| 5 |
Overall Management
- LCLS should adopt a performance capability to be reached at the completion of
construction that will assure that major systems operate successfully and to guarantee
that LCLS will ultimately achieve its required performance for science. This should be
accomplished before the CD-1 Decision.
- Make improvements and corrections needed in CD-1 documents so that a CD-1 decision can
be made in the July 2002 time frame.
|
