Progresses on SB facility CENF meeting 16 th May 2013

1. Progresses on SB facilityCENF meeting 16th May 2013 M. Calviani for the CENF SB team

2. Target hall (TCC26 + 755) 1st CENF SB study group meeting (http://indico.cern.ch/categoryDisplay.py?categId=4708) Earth ground around not needed! Ventilation area 1 Target vault Ventilation area 2 • Access ramp • Max slope acceptable for transport assumed ~7% • Max length ~25 m •  ~2.5 meters Dh • Technical gallery: •  BA81 should be • Primary cooling circuit, EN/EL, etc. Service pit M. Calviani - CENF PTM

3. Integration updates • Alignment strategy – two solution under study: • Support target/horn/reflector (THR) from the top – allow active alignment feedback as motors are away from the hot area (preferred) • THR placed on the bottom of the trench – easier but difficult to imagine active feedback S. Girod M. Calviani - CENF PTM

4. Integration updates • Guidelines: • Avoid penetration of He-vessel in inaccessible places (bottom of trench) • Striplines, water, electrical signal with a dedicated lateral flange on top of the Fe shielding • Target/horn coupled and common alignment to be foreseen • With S. Girod we started to tackle these items in priority as the most critical aspect at this stage • Evaluate the number of penetrations through the vessel needed M. Calviani - CENF PTM

5. Integration updates • If support/alignmentis based on lateral Fe blocks  mandatory to maintain constant temperature • TAX-like cooling with independent cooling circuit • ~50 kW to dissipate • Precise machining of surfaces for good thermal contact will be mandatory M. Calviani - CENF PTM

6. Target/horn integration • Target engineering and integration inside the horn must be a high priority • We should cross-check the clearances we are presently considering for between target external body and horn inner conductor • CC fibre (baseline) + Be (backup solution) • Action EN/STI – EN/MEF to be started 12 mm target Ø – 6 mm clearance M. Calviani - CENF PTM

7. Radioprotection guidelines and priorities • Shielding thicknesses assessment for target/DP is well defined • Priorities: • Clarification of concrete top shielding (to minimize it) • Shielding/configuration for the primary/SB interface • Air activation studies to address air recycling and flush (input for CV) M. Calviani - CENF PTM

8. Radioprotection guidelines and priorities • Double-walled pipes for primary circuits • Use of dry air for ventilation system – installation of air dehumidifier to reduce corrosion • For the ventilation area 2 (service pits) • Prepare for decommissioning and dismantling already now • Release of 3H in the He seems to be ok – foresee evaporator already in the design and part of the installation • Lowest pressure in the area with highest radiological risks http://indico.cern.ch/getFile.py/access?contribId=3&resId=0&materialId=slides&confId=251173 H. Vincke M. Calviani - CENF PTM

9. Horn/Reflector converters/transformer • Under investigation to reuse part of the CNGS powering equipment for horn and reflector • Part of these have been already recuperated from WANF or WANF-design! • Discussion on-going to check what could be recuperated or not • New capacitor bank in storage • PC design depends on the inductance and geometry of horn/reflector and strip line lengths • Action with TE/EPC and EN/MEF • ~14x10 m2 needed for power converter and capacitor banks (surface) • Transformer could be in the service rooms with ~10 m of striplines M. Calviani - CENF PTM

10. Target building crane • Cranes foreseen for b. 755: • Main 40 ton crane for shielding and THR movement (lifting height is 20 m) • Auxiliary 5 ton hoist (18.4 m lifting height) • Under discussion the movement and lifting height • News this afternoon  possible to 26.1 m still maintaining full vertical movement (but bigger external size) K. Kershaw Total distance from the bottom of the crane until the bottom of the service rooms is 22.5 m M. Calviani - CENF PTM

11. C&V update • Recently started iteration studies with EN/CV (M. Battistin –PJ): • Important input for integration studies • Under discussion the cooling system for horn/reflector: • How to control the level in the reservoir located below the focusing system – risk of breaking the inner conductor • 70 kW evacuation in the DP with forced air convection seems to be feasible • Location of secondary circuit in the service room ok • HS cooling & ventilation station for pit1 could be located on top of the building (more studies needed) M. Calviani - CENF PTM

12. C&V update • Primary loop either in the BA81 extension or in a dedicated technical building (reuse cooling towers b. 893) • Possibility to foresee a double-walled HX to avoid potential contamination of the primary loop to BA81 755 BA81 extension M. Calviani - CENF PTM

13. C&V update • Detailed information now needed for EN/CV to make a more refinement evaluation of costs/space/requirements • Water circuits: • Power to dissipate, water quality, DT, pressure, redundancy, etc. • Air/ventilation: • Power to dissipate (thermal charge), temperature, humidity, recirculation, flush, Dp control, redundancy • Topics will be treated in the SB WG (~bi-weekly) M. Calviani - CENF PTM

14. Geomembrane – water retention • Contacts with SIKA Suisse established • Technical material/datasheets available • Proposed solution is feasible • more detailed studies in the tendering phase, especially for the drain/sumps M. Calviani - CENF PTM

15. Conclusions • Integration and technical design aspects of the SB line are on-going • The WG will tackle the most urgent items and move forward with a TDR in mind M. Calviani - CENF PTM