Director’s Review of August 2-3, 2007 CLASSE ERL Conventional Facilities Donald Bilderback Cornell High Energy Synchrotron Source, School of Applied and Engineering Physics Cornell University, Ithaca, New York, 1. Overview of Facilities (present and future) 2. New X-ray Experimental Halls 3. New Tunnel & Cryoplant Location 4. Refurbishment of present Wilson facilities 5. Power and Utilities 6. Issues Yet To Be Resolved

Director’s Review of August 2-3, 2007 CLASSE Overview of Conventional Facilities Existing site plan: remove trailers, and add 3 new buildings (250,000 sq ft), & tunnels

Director’s Review of August 2-3, 2007 CLASSE Building #1 (East) 16 beamlines on x-ray experimental floor meter long beamlines from middle of insertion devices (5m) 70 m long from center, high-flux, (25 m long ID)

Director’s Review of August 2-3, 2007 CLASSE Building #2 (West) 2 beamlines on x-ray experimental floor 100 m long, high-flux (25 m long ID)

Director’s Review of August 2-3, 2007 CLASSE Building #3, Cryoplant Cooling Tower Cryoplant Underground

Director’s Review of August 2-3, 2007 CLASSE Tunnel Topography I D

Director’s Review of August 2-3, 2007 CLASSE Tunnel lengths

Director’s Review of August 2-3, 2007 CLASSE New Twin-Linac Tunnel

Director’s Review of August 2-3, 2007 CLASSE 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 August 2-3, 2007 CLASSE Larger 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 August 2-3, 2007 CLASSE 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 August 2-3, 2007 CLASSE End of Talk (extra questions in appendix)

Director’s Review of August 2-3, 2007 CLASSE 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 August 2-3, 2007 CLASSE 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 August 2-3, 2007 CLASSE 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?