Progresses on SB facility CENF meeting 30 th May 2013

1. Progresses on SB facilityCENF meeting 30th May 2013 M. Calviani for the CENF SB team

2. Organization of the CENF SB WG • Next meeting will be next Tuesday 4th June at 13h30 in 892-1-D20 • Meeting are not called every week, but every 2 or 3 weeks, depending on the progresses • Mailing list created: CENF-SBWG@cern.ch • EDMS already created in the CENF project space: https://edms.cern.ch/nav/P:CERN-0000096725:V0/P:CERN-0000096750:V0/TAB3 • List will include all the requird “corps de métier” CENF PTM - MC - Progresses on the SB facility

3. CE updates N. Baddams • Slope of the access road back to 7% • Ground around the surface building in order to guarantee a better protection when moving hot object on the surface CENF PTM - MC - Progresses on the SB facility

4. CE updates (b. 755) • 3D models (no shielding) from Nigel’s drawing • CE structure will be in the hands of GS/SE • Access the service rooms will be implemented with a “fosse” (material) + air-tight doors L. Faisandel CENF PTM - MC - Progresses on the SB facility

5. Integration update • As mentioned last meeting, focus on the implementation of the target/horn/reflector assembly and alignment • 3(4) feet for alignment on a special designed beam 15.5 m He-vessel structure 5.5 m S. Girod, MC CENF PTM - MC - Progresses on the SB facility

6. Integration update • Service should be (de)connectable from an accessible place on top of the iron shielding • Common flange for services & strip line lateral to the He-vessel S. Girod, MC CENF PTM - MC - Progresses on the SB facility

7. Integration update • Realistic shape for horn and reflector inner conductors • Target to be fixed on the horn front plate (ceramic spacers) S. Girod, MC CENF PTM - MC - Progresses on the SB facility

8. Integration update CENF PTM - MC - Progresses on the SB facility

9. Integration update • In order to move forward it would be necessary to proceed forward with a first engineering of the horn • Upstream and downstream neck thickness important input • Important input for target design, keeping the constraint of the physics requirement  see next slide • Alfredo’s slides as reference https://indico.cern.ch/getFile.py/access?contribId=4&resId=1&materialId=slides&confId=252456 CENF PTM - MC - Progresses on the SB facility

10. CENF PTM - MC - Progresses on the SB facility

11. Target design updates Pipe Around Target PolyC Graphite 2020 PT He (cooling) 12 mm Clamping of Pipe and Target FEA - TARGET BENDING A. Perillo-Marcone / F. Loprete CENF PTM - MC - Progresses on the SB facility

12. Target design updates d Clamping of Pipe and Target Deflection at free end for different pipe geometries A. Perillo-Marcone / F. Loprete CENF PTM - MC - Progresses on the SB facility

13. Interface primary/secondary beam NB: the collimator is there to protect the horn neck! CENF PTM - MC - Progresses on the SB facility

14. Interface primary/secondary beam • This solution is under investigation: • DGS/RP • Evaluation of the iron/marble thickness required to guarantee access in the primary beam line for maintenance • Maximum aperture of shielding’s neck to minimize back-scatter • TE/VSC • Technical feasibility of the proposed double-walled Be window • Important to clarify (primary beam): • Maximum angular spread of an off-axis beam in case of a magnet misfire • Beam divergence  impact on collimator design, horn neck and DP exit window CENF PTM - MC - Progresses on the SB facility

15. Cooling and ventilation • Requirements from the SB under analysis by Michele B. • https://edms.cern.ch/document/1288014 • Comments: • If possible use operational temperature >25 ˚C • Several points are still to be estimated, but a starting point to provide costs and surface requirements Water circuits CENF PTM - MC - Progresses on the SB facility

16. Cooling and ventilation • Comments: • As suggested by H. Vincke, use dry air for underground ventilation circuits • DGS/RP results for air activation will indicate the required flush for the SP-VENT circuit  input for DGS/SEE and EN/CV Air/He ventilation circuits CENF PTM - MC - Progresses on the SB facility

17. Powering equipment for horn/reflector • The CNGS transformers have been recuperated from WANF • S. Rangod (retired) and G. Marie (PH/DT/DI) responsible for the electrical systems (transformers and pulse circuits) • Shall we contact him to provide some feedbacks on the EL part? CENF PTM - MC - Progresses on the SB facility

18. Various items • In order to provide additional input, EN/EL will require a better understanding of the load distribution in the SB area • Will need input from EN/CV and a first integration implementation • Waste reutilisation under discussion with RP/RW • Possible use for the 2nd dump layer (reduction of muon fluence for EHN1) • Inside DP shielding concrete? CENF PTM - MC - Progresses on the SB facility

19. Various items • Discussions ongoing with EN/HE to proceed with the technical specifications of the main and of the auxiliary crane • Clarification of operation, redundancy, equipment on the hook, etc. • P. Ninin (GS/ASE) invited to participate to the SB WG activities as link person for the safety systems integration & related matters CENF PTM - MC - Progresses on the SB facility