director’s review of erl@cesr, august 2-3, 2007 classe erl conventional facilities donald...
TRANSCRIPT
Director’s Review of ERL@CESR, August 2-3, 2007
CLASSECLASSEERL Conventional FacilitiesERL Conventional Facilities
Donald BilderbackCornell High Energy Synchrotron Source, School of Applied and Engineering Physics
Cornell University, Ithaca, New York, [email protected]
1. Overview of Facilities (present and future)2. New X-ray Experimental Halls3. New Tunnel & Cryoplant Location4. Refurbishment of present Wilson facilities5. Power and Utilities6. Issues Yet To Be Resolved
Director’s Review of ERL@CESR, August 2-3, 2007
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Overview of Conventional Facilities
Existing site plan: remove trailers, and add 3 new buildings (250,000 sq ft), & tunnels
Director’s Review of ERL@CESR, August 2-3, 2007
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Building #1 (East)16 beamlines on x-ray experimental floor
65-80 meter long beamlines from middle of insertion devices (5m)
70 m long from center, high-flux, (25 m long ID)
Director’s Review of ERL@CESR, August 2-3, 2007
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Building #2 (West)2 beamlines on x-ray experimental floor
100 m long, high-flux (25 m long ID)
Director’s Review of ERL@CESR, August 2-3, 2007
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Building #3, Cryoplant
Cooling Tower
CryoplantUnderground
Director’s Review of ERL@CESR, August 2-3, 2007
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Tunnel Topography
I D
Director’s Review of ERL@CESR, August 2-3, 2007
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Tunnel lengths
Director’s Review of ERL@CESR, August 2-3, 2007
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New Twin-Linac Tunnel
Director’s Review of ERL@CESR, August 2-3, 2007
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Power and Utilities
• Electric Power is a large operating cost driver in the project with demands in the 10 to 20 MW class.
• Will need backup power of ~300 kW (diesel generator?) • Large cooling tower capacity nearby• Is it feasible to use warm water from cryoplant to heat green
houses or buildings nearby including the Wilson complex?• Noise-reduction and ascetics are important design issues – the
ERL could be very “industrial looking” with vapor-plumes from cooling towers, noisy compressors, large He gas and cryogenic storage tanks, large transformer pads, etc.
• Our concerns may conflict with Cornell Master Plan to make new beautiful entrance to the East end of Campus.
Director’s Review of ERL@CESR, August 2-3, 2007
CLASSECLASSELarger issues To Be Resolved
• Need to finish defining the Scope of the ERL project. Number of beamlines and their placement and priority of funding would be great to have from a planning point of view.
• Need a physical layout of the entire ERL complex that everyone can agree to. Without this, we can’t move beyond the conceptual level of building and utility definition that we are at now.
• Need to have discussions about the cost vs. scientific capability drivers of the building.
• We won’t get our “money’s worth” in conventional construction planning without more interactive work (first step a workshop?) with our ARUP (architectural and engineering) firm.
• What is the scope of the CESR ring refurbishment of space, utilities, and infrastructure?
• Longer range: need to hire an experienced engineer to oversee all the aspects of conventional construction who will stay with the project to completion.
Director’s Review of ERL@CESR, August 2-3, 2007
CLASSECLASSE
Specific Issues to be Resolved
• Can tunnels be build for an affordable price and reasonable risk?
• Personnel shielding wall design a large concern - a thick wall drives the beamlines further from the source.
• Radius of curvature of around 300 m in the x-ray arcs. APS has about a 200 m radius. If we can stand the smaller radius, we might decrease the cost of civil construction by shrinking the floor space per beamline.
• Will we pour all the shielding walls and hutch walls with concrete to save money and time/effort?
• Will we have “vibration issues” on sensitive beamlines and in the twin linacs? Will bus and truck traffic affect our experiments?
• Settlement issues were a problem with G-line, will the new buildings/tunnels have similar problems?
• Will pillars on a grid of 40’ x 22’ (can move them a little) be a problem for the x-ray experimental floor?
Director’s Review of ERL@CESR, August 2-3, 2007
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End of Talk
(extra questions in appendix)
Director’s Review of ERL@CESR, August 2-3, 2007
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Specific Issues to be Resolved(cont)
• How will large objects such as magnets & cryomodules enter the tunnel? Large freight elevator between the twin linacs? Crane?
• Three backup power generators for the three buildings were called for – do we really need them?
• To go to the next level of planning, we need a straw-man time table of when CESR running ceases, when CESR refurbishment takes place, when tunnels are bored, when the 3 buildings are constructed, etc.
• Can some ERL building construction proceed during CESR operations? If so, how much construction and where located?
• Where will we have enough space to stage some of the equipment manufacturing and new equipment storage during the construction phase?
• Need temperature and humidity specs for the tunnels and building space (x-ray floor: 72 ± 0.5 degrees, RH <50%)
• Environmental impact and community response to putting large buildings (especially building #2) in sensitive regions near creek.
Director’s Review of ERL@CESR, August 2-3, 2007
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Specific Issues to be Resolved(cont)
• Cryoplant area not well developed. Questions about safety if liquid nitrogen or liquid helium spills and displaces air in the underground structures.
• Can all the cryoplant compressors and parts really be efficiently installed and maintained in a 120’ circular structure?
• Need elevator plan and venting concept for the cryoplant.• Where will He gas storage tanks and large He dewars be
located that are part of the cryoplant? • What will the power substation look like and where will it be
placed? Who is paying for it? Where is the line between ERL project cost vs. Cornell infrastructure cost?
• Underground egress issues not yet sorted out – where will we have fire and safety access along the underground structures?
Director’s Review of ERL@CESR, August 2-3, 2007
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Specific Issues to be Resolved(cont)
• Need advice on grounding our experimental equipment. Do we need a large mesh structure underneath the floor to be tied to the building ground, for instance? Is it worth the investment?
More Questions?