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LINAC 4 Emittance Meter

LINAC 4 Emittance Meter. Linac 4 Emittance Meter. 1er design for commissioning of the source Slit Sem -grid Measurement plate (F.C.) Emittance meter Upgrade of the slit for 3Mev New slit. SLIT. SLIT 0.1 mm Stainless steel plate: thickness 1 mm with 0.2 mm at the slit position.

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LINAC 4 Emittance Meter

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  1. LINAC 4Emittance Meter

  2. Linac 4 Emittance Meter • 1er design for commissioning of the source • Slit • Sem-grid • Measurement plate (F.C.) • Emittance meter • Upgrade of the slit for 3Mev • New slit LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  3. SLIT SLIT 0.1 mm Stainless steel plate: thickness 1 mm with 0.2 mm at the slit position LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  4. SEM-GRID 48 wires 40 µm Tungsten space 0.75 mm LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  5. SEM-GRID LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  6. SEM-GRID LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  7. SEM-GRID Polarized plate LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  8. SEM-GRID Angle setting LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  9. Measurement plate (F.C.) LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  10. Measurement plate (F.C.) LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  11. Measurement plate (F.C.) LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  12. Emittance Meter LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  13. Emittance Meter LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  14. Emittance Meter LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  15. Emittance Meter LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  16. Emittance Meter LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  17. New Slit Design • Slit used at source front-end would reach too high temperatures at 3 MeV and would not be thick enough at 12 MeV • New slit design based on • Energy deposition: dilute energy deposition density by putting the blade with an angle w.r.t. beam axis • Minimize scattering along slit gap: minimize slit thickness • New design based on graphite plates with an angle of 15 degreesw.r.t. beam trajectory LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  18. New Slit -Thermo-Mechanical Calculations (EN-MME) ANSYS Model Temperature Evolution during multi-shots Without Cooling With Cooling • Design Completed • Fabrication Launched LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  19. Specification LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  20. NEW SLIT LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  21. NEW SLIT Graphite plate BEAM direction 15° Slit: 0.1 mm or 0.2 mm LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  22. NEW SLIT wedge to adjust by machining after metrology measurement LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  23. NEW SLIT Additional graphite plates needed to cover the whole beam during the measurement Five set of plates are ordered (3 spares) LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  24. NEW SLIT The back copper support of the graphite plate integrate the cooling circuit hole LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  25. NEW SLIT Two side plate close the cooling circuit. In the assembly, it is the only position where a brazing separate vacuum from the water of the cooling circuit LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  26. NEW SLIT Fixation of the graphite plate on the support Thickness at the slit position : 1 mm LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  27. NEW SLIT LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  28. NEW SLIT Horizontal et vertical slit LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  29. NEW SLIT Stepping motor: 200 step / turn Horizontal et vertical slit movement with potentiometer Manipulator 1.27 mm/turn => resolution 6.35 µm / motor step Sliding support Window for laser profile measurement LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  30. NEW SLIT Slope setting with the back micrometric screw 0.25 mm/ turn Tilt setting with the 2 front screw Potentiometer will be added to the micrometric screw to be able to keep the position of the alignment setting BEAM LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  31. TILT setting Is done with a optical bench The slit assembly is installed in the tank The tank is aligned to a optical bench (the survey target and the tilt reference plate are set). The assembly will be under vacuum. By acting on the 2 front micrometric screw the slit will be aligned For the slope setting the assembly will stay on the same bench and under vacuum but a laser will replace the optical system. Several iteration by acting on the 2 micrometric srew until getting the slit horizontal Horizontal ref of the optical system LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  32. Slope setting Setting the position of the slit by action on the back screw Laser beam sensor LASER BEAM Vertical movement of the laser Mechanism under vacuum Several iteration until getting the maximum value at the laser beam sensor LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  33. NEW SLIT LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  34. NEW SLIT LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  35. Budget new slit • Design: 93 kCHF • Manufacturing: 150 kCHF (88 kCHF + 60 KCHF) • Total: ~250 kCHF LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  36. Some pictures LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  37. GEFRAN PKM175 Répétitivité : 0.01 mm LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  38. LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  39. LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  40. Planning • AP : delivery of the mechanical part earliest end of November. • The supply partsare already at CERN except water flow, screw... • Planning (working days):see next slide LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  41. Planning • 1. Assembly of the graphite plate, metrology lab, machining of the wedge, cleaning, reassembly and remetrology lab: 7 days • 2. Assembly of the 2 slit out of the tank: 10 working days • 3. Assembly of the tank with the setting support on the optical alignement bench and alignment: 3 working days • 4. Assembly of the 2 slits inside the tank: 2 working days • 5. Tilt alignment of the 2 slits: 2 working days • Slope alignment of the 2 slits (not usual, probably with laser and captor): 3 working days • Check of the alignment and survey alignment 2 working days Mechanical assembly finish: 29 working days But the position setting and check of the movement for the soft and hardware electronic needed to be done with the slit assembly on the optical alignment bench and with the support of the ML section LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  42. Planning • If the delivery from the AP (Main Workshop) is end-of November • 25/01/2012 the new slit will be ready (mechanical) • BUT in parallel the Winter Shut Down !!! LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  43. Thanks to: • F. Roncarolo, B. Cheymol • B. Riffaud, E. Berthome, D. Steyaert, A. Dallochio • G. Favre, S. Mathot • M. Duraffourg, G. J. Focker • ....and all other people involved in this project LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  44. Question? • Thank for your attention • Question? LINAC 4 Beam Instrumentation Review - 18-19 October 2011

  45. Cut view LINAC 4 Beam Instrumentation Review - 18-19 October 2011

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