Future Science at JLab
Take a brief tour of the future science at Jefferson Lab with the 12 GeV Upgrade.
12 GeV Updates
December 14, 2011
Closeout reports with lessons learned are being developed for the Six-Month Shutdown in preparation for the next shutdown scheduled to begin in May 2012. The "Long Shutdown" planning team for JLab has been established. A range of 12 GeV installation activities will be incorporated into the labwide integrated installation schedule for the shutdown. Facilities Management & Logistics support is integrated with 12 GeV projects through the FM&L work order system and is coordinated weekly.
December 7, 2011
Hall B Update
Stacking of lead sheets and scintillator bars threaded with wavelength-shifting fibers is underway for the second sector of the preshower calorimeter for CLAS12. The fourth wire chamber sector for Region 2 is underway at Old Dominion University; the second Region 1 chamber is being strung at Idaho State University; and the first Region 3 chamber is being assembled at JLab. The first batch of slats for the forward time of flight 1-b detector has been assembled at the University of South Carolina. Scintillators, bent light guides and photomultiplier tubes are on order for the central time of flight detector. The first of three types of silicon sensors for the silicon vertex tracker barrel have been assembled into the first full prototype module at Fermilab, with tests of signal/noise and performance underway at JLab.
November 23, 2011
Beam tests of the first two installed 12 GeV cryomodules are complete, and the in-tunnel performance data is being reviewed. The cryomodules and the associated new radiofrequency zones are being used successfully for delivering beam to the experimental halls. Testing is underway of the first-article high-order mode filters that will be placed into the waveguides of some of the accelerating cavities. The cryogenics group is preparing to receive the 4.5K coldbox and the warm compressor skids in the next weeks.
November 16, 2011
The Six-Month Shutdown is wrapping up this week with machine restoration and preparation for the upcoming physics run. Installation work for 12 GeV during the shutdown was successful, and C-100 cryomodule testing continues in the accelerator. Closeout reports and lessons learned are being captured in preparation for the 12-month shutdown scheduled to start in May 2012. The schedule of 12 GeV installation activities for the long shutdown is under development and will be incorporated into the labwide integrated installation schedule.
November 9, 2011
The Hall D Civil construction contractor is finishing with balancing the air and water for the mechanical systems and commissioning to verify all mechanical and electrical systems are functioning according to the design requirements. On Nov. 3, inspections were conducted by representatives from the Architect-Engineering firm, Facilities Management, future Facility Users and the ESH&Q Division to establish the contract punch list. Upon completion of commissioning and safety-related punch-list items, a beneficial occupancy inspection will be conducted to turn the Hall D facilities over from the construction contractor to JLab. The beneficial occupancy date is anticipated to be toward the end of November.
November 2, 2011
The coils and yoke pieces of the Hall D solenoid are now installed in the hall. All 48 Barrel Calorimeter (BCAL) modules for Hall D have been built at the University of Regina in Saskatchewan, Canada, and 44 have now arrived at JLab. The first full six-layer package (of four total needed) is being tested for the Forward Drift Chamber. The custom preamplifier ASIC, used for the readout of the Forward and Central Drift Chambers, is being assembled onto the production preamplifier boards. All straws are inserted into the Central Drift Chamber at Carnegie Mellon University, and wire-stringing and electronics hook-up wiring has begun. The main production of 2500 bases for the lead-glass Forward Calorimeter is over one-third complete at Indiana University. Bids are being reviewed for the several hundred FADC-250 modules to be used in pipelined electronics and triggers in all halls.
October 26, 2011
At the request of the Office of Nuclear Physics, Daniel Lehman, Director of the Office of Project Assessment in DOE's Office of Science, convened a team of 24 experts plus 10 observers in an Independent Project Review of the 12 GeV CEBAF Upgrade Project held Oct. 18-20 at JLab. The purpose of the review was to assess progress in all aspects of the project. The review committee commented on the excellent progress made over the last year, with strong support from the lab in all areas. Twelve recommendations were provided to guide activities in the coming months.
Refinement of the low-level radiofrequency control system continues. Checkout of the second 12 GeV cryomodule, C100-2, is almost complete. The third 12 GeV cryomodule has been completed and moved to the Cryomodule Test Facility. Three more are being assembled. JLab personnel witnessed testing of the first-article box supply at the vendor's facility. Assembly of the third new RF zone is nearly complete.
October 5, 2011
At 21 weeks into the Six-Month Shutdown and with six weeks remaining, 12 GeV installation work is progressing as planned. Testing and commissioning of the first C-100 cryomodule is ongoing, and the second C-100 cryomodule has been installed and testing has begun. All 12 GeV activities during the shutdown period are integrated into the lab's site-wide schedule, which is progressed weekly.
September 28, 2011
Civil construction had two highlights last week. First, on the Hall D construction site, the last exterior concrete pour for the tunnel connection was completed on Friday morning, just ahead of the rain. The construction contractor has revised the sequence of activities to allow interior and exterior work to be performed in parallel to recover some weather-related schedule delays. Second, the upgraded low conductivity water systems in the South Access building for the east arc magnets and the south linac radiofrequency zones were commissioned on Thursday. The punchlist items are being addressed and the systems are scheduled for turnover to operations this week. At the North Access building, water is being circulated through the upgraded LCW systems. The west arc magnet and the north linac RF zones will be brought online starting this week, with commissioning to follow.
September 21, 2011
An intermediate design review has been held for the horizontal bend dipole magnet for the Hall C Super High Momentum Spectrometer (SHMS), and the final design review for the Q1 quadrupole magnet is set for early October. Contract awards are being readied for the first two major sections of the main spectrometer carriage, and the rails have arrived. The first large orders of parts have arrived at the power supply vendor for the five large supplies for the SHMS. Scintillator hodoscope assembly is proceeding well and mirror parts for the heavy gas Cerenkov and quartz bars for the quartz hodoscope are in hand.
September 14, 2011
Excellent progress continues to be made on the work planned for the shutdown period. All dipole magnet rework and re-installation into the arcs has been completed. Checkout of the first 12 GeV cryomodule, C100-1, is near completion. In the early stages of that checkout, a new CEBAF record of 22 Megavolts per meter was set for a phase- and amplitude-locked cavity in the tunnel. Since then, all cavities have been operated simultaneously at 18 MV/m. Refinement of the RF control algorithms is proceeding. Six cavities have been phase and amplitude locked at 15 MV/m simultaneously, which will improve as the resonance control algorithms are refined. The second new radiofrequency zone is almost ready for powering the second new cryomodule, C100-2, when it arrives in the tunnel. Testing of C100-2 is underway in the Cryomodule Test Facility.
September 7, 2011
With 17 weeks into the 2011 Six Month Shutdown and 10 weeks remaining, 12 GeV installation work is progressing as planned. Installation activities will continue for approximately six weeks, and then the accelerator start-up and related commissioning activities will begin. Continued vigilance on safety remains a priority. In addition, 12 GeV logistical planning efforts are a continuous process to support fabrication and testing of components in preparation for installation during the next machine shutdown period.
August 31, 2011
Civil construction continues to make progress during the Six Month Shutdown. At the South Access building, the upgrades to the low-conductivity water systems are near completion. The pumps for the east arc are circulating water and the pumps for the South Linac are scheduled to be started this week. For the new tunnel penetrations at the beam switchyard, the holes have been augured to the tunnel roof and sleeved. The initial core into the tunnel roof and grouting is complete for one of the penetrations. After the grout is set and the sleeve is determined to be watertight, a second core will be done to penetrate completely through the tunnel roof, anticipated to be next week. At Hall D, the walls for the tunnel extension to the existing northeast tunnel stub are complete. The watertight partition inside the existing northeast tunnel stub will be completed this week. Upon completion of the watertight partition, the subcontractor will start saw-cutting the existing tunnel roof and east wall for connection of the new tunnel extension to Hall D.
August 24, 2011
Stacking of lead sheets and scintillator bars threaded with wavelength-shifting fibers is complete for the first sector of the preshower calorimeter for CLAS12. The third wire chamber sector for Region 2 is underway at Old Dominion University, the first Region 1 sector is nearing completion of field wire stringing at JLab, and the clean room for the remaining Region 1 sectors is built at Idaho State University. The first production scintillators and photomultiplier tubes for the CLAS12 forward time-of-flight detector have arrived and are being assembled at the University of South Carolina. The first half-dozen mirror cores are built for the high-threshold Cerenkov counter and machining for the molds for the next of the four mirror types has started. The first silicon sensors, of all three types needed, for the silicon vertex tracker (SVT) barrel have arrived and are being tested. First articles of the SVT electronics have been tested and shown to give very good signal/noise performance.
August 17, 2011
Excellent progress continues to be made on the work planned for the Six Month Shutdown. Magnet rework and re-installation of the south half of the east arcs has been completed and they are back under vacuum. Work is proceeding well on getting the magnets in the north half of all arcs re-installed. All arc magnets have now been refurbished, with only a few left to measure and re-install. The first 12 GeV cryomodule has been installed in the tunnel and connected to one of the new radiofrequency zones. The expansion and upgrade of the Personnel Safety System was completed on schedule last week, which permitted in-tunnel testing of the new cryomodule-RF zone to start this past Monday. The second zone of RF has been completed and good progress has been made on the third. Three more cryomodules are at various stages of assembly.
August 10, 2011
With 15 weeks remaining in the Six Month Shutdown, 12 GeV installation work is progressing as planned. The first C-100 cryomodule is installed in the south linac of the accelerator, and all installation activities to support locking up the southern section of the machine in preparation for commissioning of the cryomodule are completing this week. Integrated 12 GeV logistical planning efforts, including material handling/transportation, space, storage and management of off-site facilities, are a continuous process that also incorporates fabrication and testing of components in preparation for installation during the next down period.
August 3, 2011
The subcontractor for the beam switchyard addition and the new tunnel penetrations mobilized on Aug. 1. Existing utilities are being relocated this week in preparation for the new work. Next week, the subcontractor will start erection of the steel for the expanded power supply room and start drilling the earth to the tunnel roof. The tunnel penetration construction is an 11-step process to ensure a water-tight sleeve to the tunnel roof prior to core drilling the concrete tunnel roof. The tunnel is below the water table, and the water-tight sleeve is needed to keep groundwater from entering into the tunnel during construction of the new penetrations.
July 27, 2011
Thirty-six of the 48 barrel calorimeter modules for Hall D have now arrived at JLab from the University of Regina, Saskatchewan, Canada, with four more expected by the end of July. The first full layer of the forward drift chamber has been assembled (of 24 total needed), and is now being tested. The custom preamplifier ASIC, used for the forward and central drift chambers, has been produced via the MOSIS service at the University of Southern California and has been sent for packaging. All straws needed for the central drift chamber have arrived at Carnegie Mellon University, with 22 of the 28 barrel layers of straws inserted and wire-stringing done for four layers. The main production of 2500 (out of 3000 total) bases has been ordered by Indiana University for the lead-glass forward calorimeter.
July 20, 2011
Excellent progress continues to be made on the 12 GeV accelerator work planned for this shutdown period. The first 12 GeV cryomodule is presently being tested in the Test Lab, and the start of powered in-tunnel testing has a target date of Aug. 15. The radiofrequency zone for that new cryomodule is complete and fully populated with klystrons; testing of that zone has started. The second zone of rf is nearing completion. The computer network is fully up in the South Linac service building. Analysis of the microphonics characteristics of that cryomodule continues. One outcome of the analysis is that the net voltage of the cryomodule would surpass that needed for 12 GeV beam, provided the microphonics conditions in final operating mode are unchanged from the in-tunnel measurements taken in June. Assembly of the second cryomodule continues; assembly of the third has started. There are now 16 of the new klystrons on site.
July 13, 2011
The 2011 six-month shutdown planning efforts included safety integration. Required pre-shutdown safety training was established and provided for construction workers and contract labor staff. Planning for required permits is identified in the six-month shutdown installation schedule and communicated at weekly progress meetings for the following week's activities. The pre-shutdown safety meeting included safety awareness for 12 GeV construction projects, as well as a video highlighting some of the 12 GeV project-related work.
June 29, 2011
The North and South Access building low-conductivity water systems upgrade is 85 percent complete and slightly ahead of schedule. There are a total of four systems being upgraded. Two North Access building systems provide cooling downstairs for the west arc magnets and upstairs for the radiofrequency zones in the North Linac Service building and the power supplies in the North Access building. Two South Access building systems provide cooling for the east arc and the South Linac Service building. The piping is complete. When the electrical and controls are also complete, the systems will be filled with de-ionized water and hydrostatic pressure tests will be performed to check for leaks.
June 22, 2011
Work is progressing on the five superconducting magnets for the Hall C Super High Momentum Spectrometer (SHMS). Materials orders are being placed for the horizontal bend (HB) dipole magnet, and manufacturing design reviews are scheduled for the Q1 quadrupole magnet. Initial samples of superconducting cable soldered to the extruded copper stabilizer have been prepared and sent to the vendor for the SHMS Q2 and Q3 quadrupole and the dipole magnets. Bids have been received for the wheels and bogies supporting the main spectrometer carriage, and the requests for proposals are being readied for the various large sections of the support carriage.
June 15, 2011
Excellent progress is being made on the accelerator installation work planned for this shutdown period. Fifteen of the 16 stacks of dipole magnets in the west arcs have been removed from the tunnel. Refurbishment of those dipoles is running somewhat ahead of schedule and field measurements are on schedule. Stacks 1-3 of the refurbished magnets have been reinstalled, and alignment has begun. The expanded linac computer network is functional in zone 23 of the south linac. In-tunnel measurements of the characteristics of the first C100 cryomodule are underway. Assembly of the second C100 cryomodule continues; assembly of the third cryomodule cavity string is underway. A new klystron has been tested successfully; it delivered its rated 13 kilowatts. Populating the new radiofrequency zones with chassis and other equipment continues.
June 8, 2011
At the request of the DOE Office of Nuclear Physics, the director of the Office of Project Assessment, Daniel Lehman, convened a Mini-Review of the 12 GeV Upgrade Project via teleconference on June 1. The panel was charged with evaluating the overall status of the project with particular focus on Hall B and responses to recommendations from the December 2010 review. The committee concluded that the project is progressing appropriately and the team is focused on the necessary Hall B subsystem issues. Recommendations were made regarding an update to the spend plan and scheduling the next full review in the October 2011 timeframe.
June 1, 2011
At the Hall D construction site, excavation for the tunnel connection is now approximately 10 feet deep, which is two feet above the existing tunnel. The excavation is an iterative process with the dewatering system. As the excavation goes deeper, additional dewatering wells are installed to further lower the water table in the area of the excavation. Next, the contractor will be installing a type of shoring called a trench box at the existing northeast stub to establish safe working conditions in the excavation for the new tunnel extension. The contractor is also installing the metal siding and roofing on the Service Building, which will house the power supplies for the Hall D beamline and tagger magnets, instrumentation racks and mechanical cooling systems.
May 25, 2011
The 12 GeV accelerator installation activities are underway. An initial survey of the beamline elements is almost complete; the information will be used as the basis for returning these elements to their present positions following removal and rework. Assembly of the first 12 GeV cryomodule is nearing completion; assembly of the second cavity string into a cryomodule is well along. Onsite powered testing of production klystrons has begun. Preparations are underway for preliminary measurements of in-tunnel characteristics of an R-100 and a C-100 cryomodule during the coming weeks.
Stacking of lead sheets and scintillator bars threaded with wavelength-shifting fibers has started for the first sector of the pre-shower calorimeter (PCAL) for CLAS12. The second Region 2 wire chamber sector is nearing completion at Old Dominion University, the first Region 1 sector is being strung at JLab, and cleanroom preparations for the remaining Region 1 sectors is underway at Idaho State University. The first assembled bars of the forward time-of-flight 1-b are assembled and undergoing testing at the University of South Carolina. The first mirror for the high threshold Cerenkov counter is being assembled. The new JLab cleanroom for the silicon vertex tracker (SVT) is complete and being equipped, and the notice to proceed was given to the vendor to produce the first items of the three different sensor types that will be used to form the stave modules for the SVT barrel region.
May 11, 2011
The 2011 six-month shutdown starts on Friday, May 13. The 12 GeV project installation schedule has been integrated into the lab-wide schedule. All transportation and material-handling equipment to support the effort is on site. The 12 GeV Upgrade project goals for the shutdown include the civil construction breakthrough of the northeast section of the tunnel; civil construction of the beam switchyard addition, including the two new penetrations to the tunnel; low-conductivity water upgrades to support magnets, box power supplies and new radiofrequency zones; removal, refurbishment and re-installation of west and east arc dipoles; arc 10 installation of the new four-meter magnets and girder assemblies; installation and commissioning with beam of two new C100 cryomodules in the south linac; installation of new RF zones in the linacs; and upgrades to the safety system.
May 4, 2011
At the Hall D construction site, the final portion of the new Accelerator site boundary fence is being installed. With the start of the CEBAF accelerator shutdown in mid-May, the contractor will remove the existing fence between the Accelerator site and the Hall D construction site, making Hall D part of the Accelerator site. This fence change will signal the start of excavation to the existing northeast stub of the accelerator tunnel for connection during the shutdown. The northeast portion of the accelerator ring road and the Hall D construction area will be posted as a construction work site with specific requirements for training and personal protective equipment (PPE). For safety reasons, access to these work sites will be limited to personnel involved with the civil construction project.
The Hall D construction contractor has transferred the last of the SEG shielding blocks and placed them in the electron beam dump. A number of concrete pours have taken place over the last few weeks, including the tagger area roof, the electron beam dump roof, the first sequence of the tagger truck ramp floor slab, the service building floor slab and the second lift of the service building south wall.
April 27, 2011
Twenty-eight of the 48 barrel calorimeter (BCAL) modules for Hall D have arrived at JLab from the University of Regina, Saskatchewan, with four more expected in early May. Following a successful construction readiness review, assembly of the forward drift chamber cathode and wire planes is underway. The custom preamplifier ASIC, used for the forward and central drift chambers, has been ordered via the MOSIS service at the University of Southern California. First shipments of the lead-glass blocks have arrived from Indiana University for the forward calorimeter for Hall D.
April 20, 2011
Assembly of the first 12 GeV cryomodule continues, and assembly of the second cavity string into the second cryomodule has begun. All beam transport quadrupole magnet girders for arc 10 have been assembled. The new contract for the septum magnets has been awarded. Three klystrons and two cathode power supplies for the radiofrequency systems have been received; the cathode power supplies have been installed in the south linac. The vendor for the new 4 Kelvin coldbox for the expansion of the Central Helium Liquefier is making good progress; the vendor for the warm compressors for that expansion is having some schedule problems due to delays in their subcontractors' component deliveries. Field measurements of the 4-meter dipole magnets for arc 10 are complete.
April 13, 2011
With only five weeks until the start of the summer 2011 shutdown, the 12 GeV project installation activities have been integrated into the labwide schedule. Additional transportation and material handling equipment has been secured to support the effort. Existing trailers have been outfitted to support additional contract employees, and storage/staging locations are in place. The project team is finalizing work-planning documents in preparation for the down, as well as handover documents to Accelerator Operations and training for operators and technicians.
April 6, 2011
The pre-construction meeting for the beam switchyard addition contract was held on March 28 and included initial discussions on installation details for the new tunnel penetrations. The cooling towers for the North and South Access low-conductivity water upgrades have been set on the structural steel framing. The Hall D construction contractor is finishing the formwork for the 3-foot-thick concrete roof on the Tagger Area. The concrete pour, totaling approximately 700 cubic yards, is anticipated the week of April 11.
March 30, 2011
The first coil for the Q1 quadrupole magnet for the Hall C Super High Momentum Spectrometer has been wound and tested at Scientific Magnetics. The design for the DC power supplies for the SHMS magnets has been reviewed and approved; fabrication will start soon. The copper stabilizer for the superconducting cable is complete, and preparations are underway to start production soldering of the cable to the stabilizer, in preparation for the start of coil winding for the SHMS Q2 and Q3 quadrupole magnets and the dipole magnet. The first of the five cryogenic control reservoirs for the five magnets has been shipped to Michigan State University for the horizontal bend (HB) magnet and the second reservoir is awaiting shipment to Scientific Magnetics. A series of procurements has started for the various sections of the SHMS support structure, with the plan to have all released by the end of FY 2011.
March 23, 2011
Assembly of the first 12 GeV cryomodule continues. Assembly of the second cavity string has been completed; four cavities are ready for the third string. All beam transport quadrupole magnets have been approved for assembly into girders, including the QP magnet pairs to be used in arc 10; the girders with single QP magnets in arc 10 have been completed. The contract for the septum dipole magnets has been terminated and will be re-bid. The resultant schedule delay is not expected to impact installation milestones. The first high-voltage power supplies for the klystrons have arrived and been installed in zone SL24. The vendor for the warm compressor skids for the Central Helium Liquefier expansion has completed mounting the motors and compressors. All vacuum pump power supplies have been received. Feedthru-antenna assemblies for the beam position monitors are arriving.
March 16, 2011
12 GeV activities for the upcoming six-month shutdown are fully integrated in the JLab sitewide schedule, and logistic planning is in full force. The goals for civil construction during this period include construction of the beam switchyard building addition with two new penetrations to the tunnel, connection of the existing tunnel to the Hall D tagger enclosure, and low-conductivity water upgrades. Upgrade activities for the accelerator include removal, refurbishment and reinstallation of all west arc dipole magnets and some east arc dipole magnets as well as the installation of the new four-meter magnets and girder assemblies in arc 10. In addition, three new C100 cryomodules will be installed in the south linac along with new radiofrequency zones and upgrades to the safety system. Two (potentially three) of the cryomodules will be commissioned.
March 9, 2011
Conventional facilities are continuing with preparations for the accelerator shutdown scheduled to start in mid-May. The Hall D construction contractor is developing an excavation plan and detailed construction schedule for the tunnel connection planned for this period. Proposals for the beam switchyard addition construction contract, which includes two new tunnel penetrations, are under review with a contract award scheduled for mid-April. The concrete pads for cooling towers, pumps and heat exchangers are being placed for the North and South Access Building low-conductivity water (LCW) upgrades, with equipment deliveries expected in April.
March 2, 2011
The first wire chamber sector for Region 2 of the Hall B CLAS12 spectrometer has been completed and signals seen with cosmic rays. The next Region 2 sector is now being strung at Old Dominion University. The photomultiplier tube and scintillator material orders for the CLAS12 forward time-of-flight panel "1b" have been placed, and the test and assembly line for FTOF-1b has been started at the University of South Carolina. The mask designs for the silicon-strip sensors for the barrel region of the CLAS12 silicon vertex tracker have arrived from the vendor, and a new cleanroom is being prepared for testing the first sensors, expected in late summer.
February 23, 2011
The first of the 13 kilowatt klystrons was received last week; onsite testing will begin after completion of the non-electrical checks. Assembly of the first 12 GeV cryomodule continues. The first two of the new curved spreader/recombiner magnets have been received; initial testing indicates that the field quality is well within the specification. The arc dipole rework/refurbishment plans were reviewed by the Accelerator Division and the 12 GeV team. Assembly has started on the quadrupole-beam position monitor-corrector girder assemblies for arc 10.
February 9, 2011
The construction contractor for the North and South Access low-conductivity water upgrades, D.E. Kirby of Portsmouth, Va., mobilized last week. Silt fencing is in place and excavation for the cooling tower foundations will begin this week, weather permitting. The 5 MVA unit substations for the Central Helium Liquefier #2 compressors were delivered and were set on the concrete pads last week. The pump startup and commissioning of the cooling towers, which provide the condenser water to the compressors, is expected to commence within the next two weeks.
February 2, 2011
Twenty-four of the total 48 barrel calorimeter (BCAL) modules for Hall D have now arrived from the University of Regina. The first 500 production units of the new Cockcroft-Walton type high-voltage synthesizer-and-divider bases for the forward lead-glass calorimeter in Hall D are beginning to arrive at Indiana University. Extensive testing of the first two production boards of the custom 16-channel 250 Megahertz Flash Analog-to-Digital Converters (FADCs) has been performed with excellent results. Several rings of straws have been inserted into the endplate support structure for the central drift chamber at Carnegie Mellon University. The first of the four superconducting coils for the Hall D solenoid was successfully tested to 1200 Amps in the Test Lab last month. The installation and testing of the second coil is underway.
January 26, 2011
All but two of the 86 niobium cavities for the cryomodules are on site, which is sufficient for all 10 of the new 12 GeV cryomodules, plus four spare cavities. Assembly of the first cavity string is complete and its installation into the first cryomodule has begun. All 36 four-meter dipole magnets for the beam transport lines have been received and testing is underway. All beam transport quadrupole magnets have been received and have passed their field quality, field strength and magnetic-vs-physical-center tests. Construction of the Central Helium Liquefier expansion’s coldbox is proceeding according to plan. Progress on the expansion of the Personnel Safety System to include the 10 new linac zones plus Hall D continues.
January 19, 2011
Installation planning for the upcoming six-month machine shutdown (mid-May to mid-November 2011) includes coordination of transportation, material handling equipment, and storage needs across the 12 GeV project. Weekly meetings continue to ensure effective integration of the 12 GeV installation activities within the JLab site-wide plan for the shutdown. Installation activities in Hall D are in progress following the ready–for-equipment milestone last month. The rules for conducting and coordinating work in Hall D can be found on the JLab web-based training document, SAF 113kd.
January 12, 2011
The Hall D Ready-for-Equipment (RFE) inspection was held in early December, with representatives from 12 GeV Upgrade management, the Hall D Group and the ESH&Q Division. The inspection resulted in a summary list of open issues. The construction contractor completed the remaining items and RFE was established on Dec. 28.
The pre-construction meeting for Phase III of the Hall D (Civil) construction contract was held on Dec. 20. Phase III includes the connection to the existing accelerator tunnel at the northeast stub. Onsite work will begin with the start of the scheduled accelerator shutdown in May 2011.
The contract for the North and South Access low-conductivity water (LCW) upgrades was awarded in December, and the pre-construction meeting was held on Jan. 5.
