Director’s Review of ERL@CESR, August 2-3, 2007 CLASSE ERL Conventional Facilities Donald...

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


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Overview of Conventional Facilities

Existing site plan: remove trailers, and add 3 new buildings (250,000 sq ft), & tunnels


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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)


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Building #2 (West)2 beamlines on x-ray experimental floor

100 m long, high-flux (25 m long ID)


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Building #3, Cryoplant

Cooling Tower

CryoplantUnderground


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Tunnel Topography

I D


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Tunnel lengths


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New Twin-Linac Tunnel


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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.


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.


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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?


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End of Talk

(extra questions in appendix)


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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.


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• 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?


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• 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?

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Director’s Review of ERL@CESR, August 2-3, 2007 CLASSE ERL Conventional Facilities Donald...

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