Site related Issues Andreas S. Schwarz XFEL Project Meeting, November 5 th , 2003 1. Site Decision 2. Plan Approval Procedure 3. Next Steps XFEL Project Meeting, November 5 th , 2003 1 Site related Issues A.S. Schwarz
1. Site Decision • BMBF decision February 5 th , 2003: – Decide to fund 50% of the XFEL project – Support continuing R&D DESY effort on Linear Accelerator Physics and Technology – Postpone decision of site for the Linear Collider ⇒ Separation of the two parts of the TESLA proposal both in time and approval status ⇒ Is the Ellerhoop site under these circumstances still the best solution? – Unclear time line of the LC – No present connection to the DESY infrastructure – Potentially large interference between XFEL operation and TESLA construction likely XFEL Project Meeting, November 5 th , 2003 2 Site related Issues A.S. Schwarz
Site Decision ff. • February 2003: DIR appoints small group of people to investigate sites that are closer to DESY with Ellerhoop as the reference site J. Schneider (chair), R. Brinkmann (co-chair), L. Hänisch, W. Bialowons, T. Tschentscher, L- A. Rump, R.-D. Heuer, J. Rossbach, R. Klanner • Basic boundary conditions – Minimal interference with a future TESLA route – Must be better than the reference site • In total O(15) meetings – Many (!) possible sites investigated; basically group into options (a) start at DESY (b) end at DESY • Decision by DESY directorate end October 2003: Propose the ”Schenefeld” site for the European XFEL Project XFEL Project Meeting, November 5 th , 2003 3 Site related Issues A.S. Schwarz
Site Decision ff. ⇒ Why is this a good site? o No interference with long term plans re. city infrastructures (e.g. U-Bahn) o The areas for the experimental halls and the access shafts are ‘open country’ o Injector on DESY site allows direct connection to DESY infrastructure (Kryo Halls, PETRA, HERA) o The area where the photons are generated shows relatively low vibration o Small interference with DESY experimental operations during construction phase o Small interference with present plans for TESLA route o Photon beam lines can be routed horizontally o Large ‘open country’ area near Schenefeld allows for extension plans o Good connection to city transport network (ÖPNV, roads) o … o (in total O(30) points used in analysis and comparison of sites) XFEL Project Meeting, November 5 th , 2003 4 Site related Issues A.S. Schwarz
Site Decision ff. “Schenefeld” site start at DESY, end south of the city of Schenefeld (Schleswig-Holstein)
Note: slightly different route from proposed one… Just for illustration… Exp. Hall XS1 Inclination approx 0.4 degrees Schenefeld DESY One possible option, has to be reviewed! XFEL Project Meeting, November 5 th , 2003 6 Site related Issues A.S. Schwarz
TESLA XFEL TESLA damping ring XFEL Project Meeting, November 5 th , 2003 7 Site related Issues A.S. Schwarz
Note: slightly different route from proposed one…just for illust ration… XFEL Project Meeting, November 5 th , 2003 8 Site related Issues A.S. Schwarz
XDU2 XDU1 XS3 Düpenau XS4 XS2 Note: slightly different route from proposed one…just for illust ration… XFEL Project Meeting, November 5 th , 2003 9 Site related Issues A.S. Schwarz
2. Plan Approval Procedure (‘Planfeststellungsverfahren’) • Why? – It is prescribed for large building projects that affect an appreciable part of the public domain – It is mandatory(!) to get approval to build the XFEL • How? – Need a law that requests it • Staatsvertrag between Hamburg and Schleswig-Holstein needs to be generated – It is led by a public authority • Organizes the procedure • Leads the proceedings • Conducts scoping date • Receives and surveys the ‘plan approval documents’ • Approves the ‘plan’ • In our case: ‘Landesbergamt Clausthal-Zellerfeld’ XFEL Project Meeting, November 5 th , 2003 10 Site related Issues A.S. Schwarz
Plan Approval Procedure ff. • When? (Tentative only!) – 10/2003: initiate Staatsvertrag 1 st draft prepared, entered into the discussion process (governments) • • Hope: ratified by 2/2004? – ~2/2004: • Landesbergamt gets installed as public authority for the Plan Approval Proced ure of the XFEL • DESY initiates environmental study (“Umweltverträglichkeitsstudie”) to measure impact of the XFEL project on the existing environment – Needs to cover one full vegetation period – Mapping of biotope (bugs, birds, plants, …) – ~ 3/2004: • “Scoping Date”: possibly affected public parties get the chance to request further/special expert reports regarding environmental issues – Noise, geology, electro smog, …? – ~ End 2004: • Hand in the planning documents to the Landesbergamt – ~ End 2005: Plan approved? – ~ Beginning 2006: Start? XFEL Project Meeting, November 5 th , 2003 11 Site related Issues A.S. Schwarz
3. Next Steps • We need to review the TDR supplement design Examples: • Is the layout in the TDR supplement really the final/best answer? – Physics case revisited – Beam distribution – Low energy line – Beam dump locations – Placement and number of access halls • Is the tunnel long enough for upgrade options – Seeding? • How to we treat the planned future site extension? – Needs to be an option that can indeed be realized later – Interference of construction with operations when extension realized? • Where do we need to adapt to the new site/constraints? – Length – Depth – Groundwater – Connection to DESY infrastructure – ??? XFEL Project Meeting, November 5 th , 2003 12 Site related Issues A.S. Schwarz
Next Steps ff. • Preparation of the Plan Approval Procedure documents – To be done in parallel to the above • Description of buildings (tunnel + halls) • Construction procedures and impact on environment • What is in the buildings and what is it used for • Aspects of operations (power, water consumption, failure analysis, risk analysis, safety, …) – Contributors: • DESY • External engineering firms • Experts with reports on selected items • Environmental study bureau • ??? – A (limited…) amount of paperwork for many of you will be unavoidable… – Organization is in preparation – stay tuned… XFEL Project Meeting, November 5 th , 2003 13 Site related Issues A.S. Schwarz
The End
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