1. (Potential) Site and Utilities
Francesco Forti
University and INFN, Pisa
SuperB International Review
Laboratori Nazionali di Frascati
November 12-13, 2007

2. SuperB Review - F.Forti - Site and Utilities
Outline
Why Università di Roma Tor Vergata ?
Footprint and constraints from territory
Electrical power and distribution
Cooling and water
Buildings and facilities
Conclusions and outlook
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

3. Why at Tor Vergata University ?
The natural site for SuperB is an existing accelerator laboratory
Large sites such as SLAC have different programs at this time
LNF site is too small to host SuperB
Tor Vergata
Close enough to make use of LNF facilities
University with schools of economics, law, engineering, humanities, medicine and science and students
Big Campus (1,480 acre ) with still a lot of available space:a 5000 m2 sport village is also under construction
Favorable building codes
A FEL project SPARX approved and funded
Setup INFN/Tor Vergata engineering group to prepare feasibility study
Started meeting in March 2007
Disclaimer: work still in the initial phase
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

4. SuperB Review - F.Forti - Site and Utilities
3 km
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

5. SuperB Review - F.Forti - Site and Utilities
Territory
The Tor Vergata campus area is owned by the University
The building code allows development with limited bureaucratic complexity (within reason):
limit number and extension of buildings
no shacks or barracks
distance from Roman Villa archeological area
possible archeological issue with access shafts
Geology is good
Terrain is geologically stable (pozzolanic ash and then tuff)
Water is at about -50m, no interference with tunnels
Need extensive geological samples to evaluate local stability
Micro seismic data are not available at this time
Limited elevation variations
between 80 and 100 m amsl
tunnel depth between 10 and 30m
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

6. SuperB Review - F.Forti - Site and Utilities
Footprint
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

7. SuperB Review - F.Forti - Site and Utilities
Footprint
SuperB Ring (about 1800m)
SPARX
SuperB Injector (about 400m)
Roman Villa
100m
SuperB Main Building
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

8. SuperB Review - F.Forti - Site and Utilities
Tunnels
Tunnel boring machine available with 6.70m external diameter. Internal diameter a bit less than 5.80 m.
Seems adequate
Linac will need a double tunnel for the RF and klystrons
Main ring will use a single tunnel with 4 or 6 surface service buildings
PEP-II
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

9. Electrical power and distribution
Site power is only approximate at this stage.
A rough estimate of absorbed power is the following
This corresponds to an electrical plant sized between 50 and 75 MW
Power supplier
It is possible to buy power at 150kV from at least a couple of suppliers
The University is planning an on site power generation system (especially for the hospital): it may be possible to exploit synergies.
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

10. SuperB Review - F.Forti - Site and Utilities
Power Plant
Main high voltage transformer area
150kV/20kV
4 high voltage modules
120 x 80 m2 open area
power delivery building
about 400 m2
located in Sg3 area
Substation buildings
20kV/220V transformers
Rephasing
RF transformers
3 along linac + 6 (or 4) around main ring
about 15x11 m2 area.
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

11. SuperB Review - F.Forti - Site and Utilities
Cooling and water
35 MW of heat dissipation need serious cooling
circulating water of about 8m3/s with ΔT=10° C
Water cooling towers solution
large water consumption: 32 l/s extrapolated from DAFNE and PEP-II, due to evaporation and rinsing of towers
not enough water on site (max maybe 20 l/s). The entire Frascati town uses 50 l/s.
power estimates: about MW
Dry coolers
exchange heat with air through radiators
need at least 5° C temperature difference:
air <27°C, inlet water 32° C, outlet water 40°C
when outside temperature is higher than 27° needs an additional cooling system
power estimates: 3MW for winter operation, 10MW for summer operation
area estimates: 4 stations with 250m2 covered plus 1300m2 open area.
Not yet on the map, should be located next to the electrical substations
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

12. Buildings and Facilities
The vicinity with LNF will allow the use of workshops and many facilities from there.
Electrical distribution and cooling buildings will be partly underground (3-5m) to avoid excessive visual impact on the campus
Main complex building will be over the experimental hall and connected through the installation shaft
Area for central laboratory complex, local shop, detector support area, control room estimated around 6000 m2, to be refined.
Experimental hall of about 20x60 m2 with a 8 m diameter access shaft
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

13. SuperB Review - F.Forti - Site and Utilities
Experimental Hall
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

14. SuperB Review - F.Forti - Site and Utilities
Cost Estimate
The CDR cost estimate is based on rather generic numbers for excavation and buildings.
More detailed cost evaluations will be needed once the infrastructure needs are more defined.
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities

15. Conclusion and outlook
The site on the Tor Vergata University can potentially host the SuperB accelerator
It is very close to LNF and can profit from its facilities
An engineering group has been setup to prepare a feasibility study for the civil infrastructure and utilities
Let’s start digging…
Nov 11-12, 2007
SuperB Review - F.Forti - Site and Utilities