1. 6 April 2006Malika Meddahi 1 CNGS Project: primary beam 1.Project Overview 2. Proton beam line overview and status 3. Target status 4. Commissioning preparation

2. 6 April 2006Malika Meddahi 2 (see http://cern.ch/cngs) CNGS – a long base-line neutrino beam facility (732 km) send   beam -> detect  appearance CNGS project at CERN: production of the  beam using protons from the existing accelerator chain 1. Project Overview At Gran Sasso: OPERA detecting 

3. 6 April 2006Malika Meddahi 3 CNGS: the main components vacuum 700 m 100 m 1000m 67 m p + C  (interactions)   , K , (   )  (decay in flight)     

4. 6 April 2006Malika Meddahi 4

5. 6 April 2006Malika Meddahi 5 2. Proton beam line overview and status

6. 6 April 2006Malika Meddahi 6 Nominal beam parameters Upgrade phase: 3.5 10 13 p

7. 6 April 2006Malika Meddahi 7 Nominal parameters : Beta at focus : 10 m, 20m Beam size  at 400 GeV : 0.5 mm Beam divergence  ’ at 400 GeV : 0.05, 0.03 mrad Optics at Target Possible to increase further the beam size

8. 6 April 2006Malika Meddahi 8 Proton beam line overview

9. 6 April 2006Malika Meddahi 9 TA40 TT40 Beam Dump TED Safety beam stopper SPS extraction point to CNGS target to LHC SPS beam CNGS&LHC beam MBHC 13mrad MBHA 15mrad MBSG 25mrad TT41 extraction point to beam dump

10. 6 April 2006Malika Meddahi 10 Electrical distribution box BPM control box Magnet Interlock box Transfer line layout: half cell MBG MDG QTG 5.6% slope BEAM

11. 6 April 2006Malika Meddahi 11 MBG73 magnets (78 ordered) Gap height 37 mm Nominal field : 1.7 T @ 400 GeV Magnetic length : 6.3 m New TT41 magnets QTG20 magnets (23 ordered) Nominal gradient 40 T/m, 2.2 m long Magnetic aperture : 45 mm MDG12 magnets (17 ordered) Bending angle 80  rad Gap height : 45 mm Overall length: 700mm

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14. 6 April 2006Malika Meddahi 14 BPM1 BTV1 BFCT BPM2BPM3 BTV2 BTV3 3 m5 m TBID 2 BLMs Target Beam Last 20m of TT41

15. 6 April 2006Malika Meddahi 15 Final focusing onto the target (recuperated magnets)

16. 6 April 2006Malika Meddahi 16 In order to protect the neck of the horn inner conductor d=18 mm): 1 m collimator in Boron Nitrite, d=14 mm. beam targethorncollimator

17. 6 April 2006Malika Meddahi 17 Proton beam: last beam position / beam profile monitors upstream of the target station collimator and shielding BN collimator

18. 6 April 2006Malika Meddahi 18 18 beam position monitors in proton beam line (BPG) + 4 in common line with LHC (BPK) 1 coupler in air on target table (BPKG) 8 proton beam profile monitors (BTVG) 18 beam loss monitors (BLM) 1 beam current transformer (BFCT) (+1 BFCT in common line with LHC Beam line instrumentation

19. 6 April 2006Malika Meddahi 19 Beam Position Monitoring Beam Position Measurement Requirements 18 Button Electrode BPGs in TT41 60mm Aperture Intensity Range: 1  10 12 to 3.5  10 13

20. 6 April 2006Malika Meddahi 20 Target Beam Position Monitor Final standard BPG of the proton beam line & target BPKG  used to provide position at the target  setting up performed using final beam line BPG  aiming at target rods verified & tracked using target BPKG  accuracy of measurement ±0.2mm in ±2mm central region.  accuracy of measurement ±0.5mm outside ±2mm central region. Target Beam Position Measurement Requirements

21. 6 April 2006Malika Meddahi 21 BPKG – special beam position monitor on target table Stripline Coupler Pick-up operated in air

22. 6 April 2006Malika Meddahi 22 75  m carbon and 12  m titanium screens 5 to 10 % precision requested Ti screen “in” Beam Profile monitors

23. 6 April 2006Malika Meddahi 23 Beam Loss Monitoring Beam losses will be detected using:  18 standard 1 litre, SPS, nitrogen filled ionisation chambers  30 parallel plates with 5mm separation - ionisation length of 19cm  efficiency of ~1250 pairs per primary charge

24. 6 April 2006Malika Meddahi 24 Beam Current Transformers Two Monitors – one at the beginning & one at the end of the line Absolute Accuracy of 1% for the Intensity Range: 1  10 12 to 3.5  10 13 First BCT sees both LHC & CNGS beams Has to fulfill additional requirement of LHC bunch by bunch capability (i.e. 25ns resolution)

25. 6 April 2006Malika Meddahi 25 3. Target status

26. 6 April 2006Malika Meddahi 26 Downstream Window Target Support Sealed finned tube Inert gas End cap Upstream Window The target unit is conceived as a static sealed system filled with 0.5 bar of He. MATERIALS Tube:Al-Mg alloy Windows: Be by Brush & Wellman Target Support:Carbon Fiber reinforced Carbon Target rod: Fine-grain graphite, sintered carbon, C-C composite Central tube “Graphite rods”, L = 10 cm,  = 5 / 4 mm Target Station

27. 6 April 2006Malika Meddahi 27 The target units

28. 6 April 2006Malika Meddahi 28 Target Magazine + BPKG Indexing finger BPKG

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33. 6 April 2006Malika Meddahi 33 4. Commissioning preparation a)First extraction tests b) Plans for the commissioning periods

34. 6 April 2006Malika Meddahi 34 Beam dump Safety beam stopper SPS extraction point to target to LHC SPS beam CNGS&LHC beam Beam loss monitors Profiles Beam Current Monitor TA40 TT40 SPS extraction point First checks of CNGS beam extraction

35. 6 April 2006Malika Meddahi 35

36. 6 April 2006Malika Meddahi 36 - Hardware commissioning Feb. – April 2006 Beam instrumentations: BLM and BTVG done, BPG in progress Power supplies done Magnets (polarities)in progress Vacuum systemdone - “Dry runs” April – May 2006 Timing Controls Interlocks Beam permit Magnets (current & polarities) - Commissioning with beam 2006: weeks 22, 25 and 27 Commissioning schedule

37. 6 April 2006Malika Meddahi 37 Commissioning schedule Week 22 : low intensity Week 25 : low to medium intensity Week 27 : high intensity, full facility

38. 6 April 2006Malika Meddahi 38 SPS Cycle Proposal for 2006 –Commissioning: 12s FT + 6s CNGS –Run 1 12s FT + 6s CNGS + 4.8s MD –Run 2 12s FT + 3x6s CNGS + 4.8s MD

39. 6 April 2006Malika Meddahi 39 Plans for week 22 Upper limit of total protons sets to 2 10 16 for week 22

40. 6 April 2006Malika Meddahi 40 Plans for week 25 Upper limit of total protons sets to 3 10 16 for week 25

41. 6 April 2006Malika Meddahi 41 Plans for week 27 Upper limit of total protons sets to 5 10 16 for week 27

42. 6 April 2006Malika Meddahi 42 Next: Edda’s presentation on secondary beam line

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44. 6 April 2006Malika Meddahi 44 TAG41 TSG4 TCC4

45. 6 April 2006Malika Meddahi 45 Commissioning team, mandate, list of subjects to be addressed were defined

46. 6 April 2006Malika Meddahi 46