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CNGS Project: primary beam

CNGS Project: primary beam. Project Overview 2. Proton beam line overview and status 3. Target status 4. Commissioning preparation. 1. Project Overview. (see http://cern.ch/cngs). CNGS – a long base-line neutrino beam facility (732 km) send n m beam -> detect n t appearance

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CNGS Project: primary beam

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  1. CNGS Project: primary beam • Project Overview 2. Proton beam line overview and status 3. Target status 4.Commissioning preparation

  2. 1. Project Overview (see http://cern.ch/cngs) CNGS – a long base-line neutrino beam facility (732 km) sendnm beam ->detectnt appearance CNGS project at CERN: production of the nmbeam using protons from the existing accelerator chain At Gran Sasso: OPERA detecting nt

  3. CNGS: the main components 700 m 100 m 1000m 67 m vacuum p + C (interactions) p+, K+, (+) (decay in flight)  m+ + nm

  4. 2. Proton beam line overview and status

  5. Nominal beam parameters Upgrade phase: 3.5 1013 p

  6. Optics at Target Nominal parameters : • Beta at focus : 10 m, 20m • Beam size sat 400 GeV : 0.5 mm • Beam divergence s’ at 400 GeV : 0.05, 0.03 mrad Possible to increase further the beam size

  7. Proton beam line overview

  8. TT41 extraction point to beam dump TA40 Beam Dump TED TT40 MBHA 15mrad CNGS&LHC beam SPS extraction point SPS beam MBHC 13mrad Safety beam stopper to CNGS target TT40 to LHC MBSG 25mrad SPS

  9. Transfer line layout: half cell MDG BEAM MBG Electrical distribution box 5.6% slope BEAM QTG Magnet Interlock box BPM control box

  10. New TT41 magnets MBG 73 magnets (78 ordered) Nominal field : 1.7 T @ 400 GeV Magnetic length : 6.3 m Gap height 37 mm QTG 20 magnets (23 ordered) Magnetic aperture : 45 mm Nominal gradient 40 T/m, 2.2 m long MDG 12 magnets (17 ordered) Gap height : 45 mm Bending angle 80 mrad Overall length: 700mm

  11. Target Beam TBID BPM2 BPM3 BPM1 BFCT 5 m 5 m 3 m BTV1 BTV2 BTV3 2 BLMs Last 20m of TT41

  12. Final focusing onto the target (recuperated magnets)

  13. beam collimator target horn In order to protect the neck of the horn inner conductor d=18 mm): 1 m collimator in Boron Nitrite, d=14 mm.

  14. BN collimator Proton beam: last beam position / beam profile monitors upstream of the target station collimator and shielding

  15. 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

  16. 18 Button Electrode BPGs in TT41 60mm Aperture Beam Position Monitoring Beam Position Measurement Requirements Intensity Range: 11012 to 3.51013

  17. Target Beam Position Monitor Target Beam Position Measurement Requirements 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.

  18. BPKG – special beam position monitor on target table Stripline Coupler Pick-up operated in air

  19. Beam Profile monitors 75 mm carbon and 12 mm titanium screens 5 to 10 % precision requested Ti screen “in”

  20. 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

  21. First BCT sees both LHC & CNGS beams • Has to fulfill additional requirement of LHC bunch by bunch capability (i.e. 25ns resolution) 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1012 to 3.51013

  22. 3. Target status

  23. Target Station “Graphite rods”, L = 10 cm, F = 5 / 4 mm The target unit is conceived as astatic sealed systemfilled with 0.5 bar of He. End cap DownstreamWindow Sealed finned tube Target Support Inert gas Central tube 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 End cap UpstreamWindow

  24. The target units

  25. Target Magazine + BPKG BPKG Indexing finger

  26. 4. Commissioning preparation • First extraction tests • b) Plans for the commissioning periods

  27. Profiles Profiles Profiles Beam Current Monitor TA40 Beam dump Beam loss monitors TT40 CNGS&LHC beam SPS extraction point SPS extraction point SPS beam First checks of CNGS beam extraction Safety beam stopper to target TT40 to LHC SPS

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

  29. Commissioning schedule Week 22 : low intensity Week 25 : low to medium intensity Week 27 : high intensity, full facility

  30. 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

  31. Plans for week 22 Upper limit of total protons sets to 2 1016 for week 22

  32. Plans for week 25 Upper limit of total protons sets to 3 1016 for week 25

  33. Plans for week 27 Upper limit of total protons sets to 5 1016 for week 27

  34. Next: Edda’s presentation on secondary beam line

  35. TAG41 TCC4 TSG4

  36. Commissioning team, mandate, list of subjects to be addressed were defined

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