Site related Issues Andreas S. Schwarz XFEL Project Meeting, - - PowerPoint PPT Presentation

1 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

Site related Issues

1. Site Decision

• 2. Plan Approval Procedure
• 3. Next Steps

Andreas S. Schwarz XFEL Project Meeting, November 5th, 2003

2 Site related Issues XFEL Project Meeting, November 5th, 2003 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

3 Site related Issues XFEL Project Meeting, November 5th, 2003 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

4 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

Site Decision ff.

⇒ Why is this a good site?

• No interference with long term plans re. city infrastructures (e.g. U-Bahn)
• The areas for the experimental halls and the access shafts are ‘open country’
• Injector on DESY site allows direct connection to DESY infrastructure (Kryo

Halls, PETRA, HERA)

• The area where the photons are generated shows relatively low vibration
• Small interference with DESY experimental operations during construction

phase

• Small interference with present plans for TESLA route
• Photon beam lines can be routed horizontally
• Large ‘open country’ area near Schenefeld allows for extension plans
• Good connection to city transport network (ÖPNV, roads)
• …
• (in total O(30) points used in analysis and comparison of sites)

Site Decision ff.

“Schenefeld” site

start at DESY, end south of the city of Schenefeld (Schleswig-Holstein)

6 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

Inclination approx 0.4 degrees DESY Schenefeld XS1

• Exp. Hall

One possible option, has to be reviewed! Note: slightly different route from proposed one… Just for illustration…

7 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

XFEL TESLA damping ring TESLA

8 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

Note: slightly different route from proposed one…just for illust ration…

9 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

XS3 XS4 XDU2 XS2 XDU1 Düpenau

Note: slightly different route from proposed one…just for illust ration…

10 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

• 2. Plan Approval Procedure
• 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’

(‘Planfeststellungsverfahren’)

11 Site related Issues XFEL Project Meeting, November 5th, 2003 A.S. Schwarz

Plan Approval Procedure ff.

• When?

(Tentative only!) – 10/2003: initiate Staatsvertrag

• 1st 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

• f 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?

12 Site related Issues XFEL Project Meeting, November 5th, 2003 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 – ???

13 Site related Issues XFEL Project Meeting, November 5th, 2003 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…

The End