Future Science at JLab
Take a brief tour of the future science at Jefferson Lab with the 12 GeV Upgrade.
12 GeV Updates
May 7, 2008
An important milestone for the civil design portion of the 12 GeV Upgrade Project was achieved April 25. Approximately 75 percent of the total civil design effort is complete including the final design documents for the Hall D Complex and the Central Helium Liquefier (CHL) Addition. This includes more than 50 drawings and approximately 1,500 pages of specifications.
The in-house civil design effort continues to progress. On April 22, Facilities Management team members met to discuss the internal design and safety review comments of the 100 percent design documents for the North & South (N&S) Access Utility Upgrades for the accelerator.
April 30, 2008
The R&D task to re-measure the higher-order mode (HOM) damping in the 12 GeV Superconducting Radio-Frequency (SRF) cavities is proceeding; re-assembly of two cavities into the horizontal testbed (HTB) will occur in approximately two weeks, with additional measurements in the Cryomodule Test Facility then following.
Preparations are underway for the July 22-24 Independent Project Review by DOE. The primary focus of the preparations is ensuring that the criteria for Critical Decision 3 Approval ("Start of Construction") are well in hand.
April 23, 2008
A review of the planned Silicon Vertex Tracker (SVT) Detector for the Hall B CLAS12 spectrometer was held on April 2. Since this is a new detector technique for JLab, three outside experts on the design, construction and operation of these detectors and associated electronics formed the review committee. The Hall B team of scientists and engineers received very valuable technical input and three recommendations for further work. On April 15-17, a design and safety review of the seven superconducting magnets planned for the Halls B and C spectrometers was held. Key collaborators from Michigan State University (Hall C) and from the Efremov Institute (Hall B) attended the review to present their work alongside the JLab team. The review committee gave very high marks for the significant progress since the 2006 magnet review, and lively technical discussions provided valuable feedback to fold into further work to complete the reference designs of these magnets.
April 16, 2008
The source selection plan for the Hall D Complex construction contractor was approved on April 9, 2006. The subcontract will be awarded to the offeror that represents the best value to JSA/Jefferson Lab on the basis of capability and price. The evaluation of capability will be based on several criteria, including experience with similar projects; the environmental, safety and health (ES&H) program; and past performance. Review comments from an internal design and safety review of the 100 percent design of the North and South Access utility upgrades have been consolidated; a meeting to discuss these findings is scheduled for April 22.
April 9, 2008
A design & safety review of the 12 GeV Cryomodules system was held March 28; the review panel strongly endorsed the team's work and projected that the design packages will be completed on schedule. The panel also found that the team had responded appropriately to the recent beam-breakup problems seen with Renascence during beam operations.
A vertically integrated test of the low-level RF (LLRF) controls with the self-excited–loop software was performed successfully; the test included the latest versions of the digital board, RF board, and PC/104 IOC-replacement with all operating in concert.
The Arc 10 quadrupole girder drawings were signed off.
The 2008 DOE Office of Science Office of Project Assessment Independent Project Review of the 12 GeV Upgrade Project will be held July 22-24. As in the past, it will be led by Dan Lehman, who heads the Office of Project Assessment in DOE's Office of Science.
April 2, 2008
Over the last few months, four independent reviews have been held of various physics detector systems, and five more reviews are planned in April and May. These reviews give valuable feedback to the scientists and engineers as they complete system design packages in preparation for the July 2008 DOE SC Office of Project Assessment Independent Project Review. Last week, the Hall D tracking and related particle identification systems were reviewed. During the closeout, reviewers provided high marks on progress in the last year and the quality of the presentations. A review of the CLAS12 Silicon Vertex Tracker detector will be held this week. Both Halls B and C are in the final preparations for a design review of their seven superconducting spectrometer magnets. In Hall C, particle background simulations are ongoing to finalize the shield house design.
March 26, 2008
Design effort on the conventional facilities to support the 12 GeV CEBAF Upgrade continues to progress. The 100 percent design package for the North and South Access utility upgrades was completed by the JLab Facilities Design Team. This project expands the low-conductivity water (LCW) systems for the linac service buildings and the arc magnets and adds electrical substations to increase the power capacity at each building. The design package has been distributed for an internal design and safety review.
The JLab Procurement group has posted the Sources Sought notice for construction contractors interested in the Hall D Complex. This will be a best-value procurement, which evaluates a vendor's capability in addition to the price as part of the selection process.
A Change Request has been approved authorizing three additional R&D tasks for the Upgrade cryomodules: (1) precise re-measurement of the damping of higher-order modes in two 12 GeV cavities in the Horizontal Test Bed (HTB), (2) repeat of those measurements in the Vertical Test Area (VTA) to vet a new step in the cryomodule quality assurance process, and (3) explore alternate thermal strapping strategies for the cavity endgroups for potential cost savings.
March 19, 2008
Excellent progress continues on the design work for the 12 GeV Upgrade of the accelerator systems; in February, ~10 percent more progress was achieved than was planned. The Beam Transport quadrupole prototyping had a setback when the vendor for the laminations was unable to meet the specifications. A contract has been placed with an alternate vendor. The draft specification for the klystron procurement has been approved; the draft specification for the 4.5K coldbox procurement for the cryogenics system is undergoing review. An informal, internal review of the design work on the digital board for the low-level radio frequency controls endorsed the planned work.
March 12, 2008
Progress continues on various detector-related R&D projects, mainly in Halls B and D, and on engineering and design work in all halls. In Hall C, the next phase of a contract to complete the reference design of the Super High Momentum Spectrometer (SHMS) support structure and shield house has started. A design and safety review of the Hall D Barrel Calorimeter and Forward Calorimeter took place at JLab on Feb. 19-20. The review included presentations by several JLab users on their detector and electronics work and excellent discussions of the technical aspects of the design. The committee report is expected within the next few weeks. A recent Hall B collaboration meeting included a strong emphasis on both 12 GeV engineering work and science capabilities. Hall D hosted a workshop last week to discuss additional ideas for science with the GlueX detector, with more than 60 attendees.
March 5, 2008
Design effort on the conventional facilities to support the 12 GeV CEBAF Upgrade continues to progress. On Feb. 1, the Architect-Engineer firm, HSMM (Hayes, Seay, Mattern & Mattern) submitted design documents for the Hall D conventional facilities that incorporated review comments from the internal design and safety review held in November 2007. JLab Facilities Management personnel have reviewed these documents and validated the design is complete and ready for procurement. The signed final design documents are to be submitted in early March.
Also, a detailed construction schedule for the Hall D conventional facilities was completed by a local construction management firm. The purpose of this detailed schedule was a crosscheck on the construction phase durations and the "ready for equipment" installation dates in the 12 GeV CEBAF Upgrade baseline schedule.
February 20, 2008
The 12 GeV Accelerator Team continues to make good progress on Project Engineering and Design (PED). A review was held of the proposed procurement strategy for the beamline magnets, and a decision was made to shift from JLab buying the materials and supplying them to the magnet vendors to one which has the vendors buy the materials; the new plan yields more schedule flexibility with no technical risk and roughly the same cost risk as the previous baseline plan. A Change Request to reflect this altered strategy is under development. Ten of the 12 Advanced Procurement Plans for FY09 accelerator-related major procurements have been approved, with the final two expected to be complete in the next week. Progress also continues on the R&D effort to prototype the beamline quadrupoles. Feedback has been provided to the vendor of the laminations, and fixtures for winding the coils at JLab have been completed.
February 13, 2008
The draft specifications have been developed for the Hall B CLAS12 (CEBAF Large Acceptance Spectrometer ) Torus Magnet, one of the seven planned superconducting magnets associated with the 12 GeV Upgrade. A design and safety review of the Super High Momentum Spectrometer (SHMS) Hall C detectors was held at JLab on Jan. 22 with an emphasis on integration plans. Presentations were made by several Hall C Users, some of whom will construct detector elements through approved National Science Foundation Major Research Instrumentation grant funding. A successful technical design review of the continuing work on the Hall D Forward Drift Chambers was held at JLab on Feb. 1. Final reports from these review committees are expected this week.
February 6, 2008
Design effort on the conventional facilities to support the 12 GeV CEBAF Upgrade continues to progress. The 100 percent design package for the Beam Switchyard (BSY) Service Building Addition was completed by the JLab Facilities Design Team. This is an internal addition in Building 98 that expands the power supply room into the welding area and includes two new penetrations into the accelerator tunnel. The package has been distributed for an internal design and safety review, and a meeting to discuss the review findings is scheduled for Feb. 13. Also, JLab Facilities has reviewed the first draft of the Hall D Complex Commissioning Plan developed by a local construction management firm.
January 30, 2008
The 12 GeV Accelerator Team continues to make good progress on the Project Engineering Design (PED). The cryomodule team will soon complete the planned work for FY08 and will begin work originally planned for FY09. A modified plan for the PED of the Low-Level Radio Frequency (LLRF) controls has been implemented following an approved Change Request in December; a significant event this month was completion of the new digital board for that system. The Cryogenics Team is on cost and ahead of schedule on its design work. All the 12 GeV accelerator teams have draft Advance Procurement Plans (APP) under review for the major FY09 procurements; the Cryogenics team has completed its FY09 APP and has a draft APP for its FY10 major procurements. Initial laminations have been received for the R&D prototype Beam Transport quadrupoles; these will be inspected prior to the vendor starting stacking.
January 23, 2008
A full-scale, wooden mock-up of a segment of the planned Hall B CLAS12 has been constructed in the physics storage building mimicking two coils of the torus magnet and one sector of
the Region-II drift chamber. The mock-up has been used so far to test Region-II drift chamber mounting and to verify maintenance access and will be used to optimize cable routing. Regions I and III will be added to the mock-up in the future.
January 16, 2008
Design effort on the conventional facilities to support the 12 GeV CEBAF Upgrade continues to progress. On Dec. 20, the Design and Safety Review meeting on the 100 percent design of the North and South Access Building Additions was held at Jefferson Lab. Facilities Management and Logistics is focused on completing the 100 percent designs for the Beam Switchyard (BSY) Addition and the North and South Access Utility Upgrades this month. On Feb. 1, the Architect-Engineer (A-E) firm, HSMM (Hayes, Seay, Mattern & Mattern), is scheduled to submit the draft Final Design documents of the Hall D Complex for JLab review.
