Forthis and much more material, visitthe free download area on: <br />http://www.surfacetreatments.it/<br />http://www.sli...
Nb3Sn Films by Multilayer Sputtering<br />A.A. Rossi^*, S. M. Deambrosis*, S. Stark*, V. Rampazzo*, <br />V. Rupp^*, R. G....
° IUAC, New Delhi, India</li></li></ul><li>MULTILAYERS FOR SRF <br />Interdiffusion<br />Nb/Snsputterin<br />          spu...
Sample deposition by PLANAR MAGNETRON<br /><ul><li>  TUMBLING
  BCP
  EP
  SPUTTERING
  CRYOGENICS</li></ul>6 GHz CAVITY mini-lab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
Sample deposition by PLANAR MAGNETRON<br /><ul><li>   BALANCED PLANAR MAGNETRON
   2 INCHES TARGET</li></ul>NbSn<br />
Sample deposition by PLANAR MAGNETRON<br />Nb MAGNETRON<br />STEP MOTOR<br />14 cm<br />SAMPLE<br />OLDER<br />Sn MAGNETRO...
Sample deposition by PLANAR MAGNETRON<br />
Sample deposition by PLANAR MAGNETRON<br />MULTILAYER – ANALISI XRD<br />Only Nb3Sn peaks<br />
Sample deposition by PLANAR MAGNETRON<br />
Sample deposition by PLANAR MAGNETRON<br />Max RRR = 3,58<br />
Sample deposition by PLANAR MAGNETRON<br /><ul><li>  TUMBLING
  BCP
  EP
  SPUTTERING
  CRYOGENICS</li></ul>6 GHz CAVITY minilab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
RSTRADITIONAL MEASUREMENTS Vs 6 GHz CAVITY<br />1,3 - 1,5 GHz <br />“Real” Cavities<br />Fabrication of Cavities<br />Usab...
6 GHz CAVITY MINILAB<br />------------<<<0>>>-------------<br /><ul><li>   No electron beamwelding, neitherforflanges
Obtainedby spinning fromNbscraps
   Short fabricationtime
   Fast and low cost  BCP and EP treatments   (~ 3lt acids)
InexpensiveCryogenics, fast cooling and warming up
QuickRF Measurements (traditionalrf system) </li></li></ul><li>CavityGeometry<br />36 mm<br />Seamlessflanges<br />20 mm<b...
Cavityfabrication<br /><ul><li>  By Spinningfrom scraps of spun 1.5 GHz </li></ul>40 cm<br />6 GHz  Cavity<br />1.5 GHz  C...
Low research budget  Large amount of cavities<br />6 GHz <br />
Mini MechanicalTumbling<br /> SiC<br />ZrO2<br />Al2O3 + SiO2<br />Turbula mixer<br />Willy Bachofen<br />http://www.wab.c...
Mini EP<br />
A Mini – BCP / EP Lab<br />
A Mini - Chemical/Electrochemical Lab<br />to <br />control unit<br />and<br />power supply<br />to the <br />pump<br />ca...
6 GHz CAVITY MINI-Camera<br />
Ready for the RF measurement<br />
6 GHz CAVITY: MINI-Kapton gasket<br />
Cryogenicinfrastructure:<br />The Bottom Part<br />Bottom Part<br />Pick-up-Pipe<br />Coupler - Pipe<br />Double Pumping l...
Cryogenicinfrastructure:<br />Triple Stand<br />μ-metal <br />Screen<br />cavity<br />
Quick RF Measurements<br />The insert has been conceived to even enter into a 450 lt Helium dewar <br />INSERT<br />DEWAR<...
Sample deposition by PLANAR MAGNETRON<br /><ul><li>  TUMBLING
  BCP
  EP
  SPUTTERING
  CRYOGENICS</li></ul>6 GHz CAVITY mini-lab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
Idea: 1<br />CavityMotion<br />Magnet<br />Magnet<br />Sn<br />Nb<br />
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F_Berlin srf2009 6GHz seamless cavities_A A Rossi

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The common limitation of systems conceived for the RF characterization of samples consists in the difficulty of scaling the measured results to the real resonator. The revolutionary idea consists in the production of small resonators (6GHz) completely equal in shape to the real scale model. Performing RF tests on a large amount of cavities it is possible to study alternative thin film superconducting materials, traditional and innovative surface treatments. In this framework Nb3Sn films are deposited on the internal surface of 6GHz cavities through the multilayer sputtering method. A UHV magnetron sputtering technique in a post magnetron configuration has been used. A Nb-Sn cathode is maintained in a fixed position, while the 6GHz resonator can be moved up and down thanks to a linear feedtrough. The external coil is mounted in the cathode zone. The cavity is then annealed at 960°C for a few hours (UHV) to obtain the stoichiometric A15 phase. The surface resistance is evaluated through the cavity quality factor measurement at 4.2 K.

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F_Berlin srf2009 6GHz seamless cavities_A A Rossi

  1. 1. Forthis and much more material, visitthe free download area on: <br />http://www.surfacetreatments.it/<br />http://www.slideshare.net/PalmieriProfEnzo<br />
  2. 2. Nb3Sn Films by Multilayer Sputtering<br />A.A. Rossi^*, S. M. Deambrosis*, S. Stark*, V. Rampazzo*, <br />V. Rupp^*, R. G. Sharma°*. F. Stivanello* and V. Palmieri^* <br />^ Padua University, Material Science Dept., Italy<br /><ul><li>INFN – Legnaro National Labs ., Italy
  3. 3. ° IUAC, New Delhi, India</li></li></ul><li>MULTILAYERS FOR SRF <br />Interdiffusion<br />Nb/Snsputterin<br /> sputtering deposition Interdiffusion<br /> No Interdiffusion<br /> SC/Insulator deposition<br />-> Increase of Hc<br />Nb3Sn<br />Our Aim<br />H<br />Possible Future Application<br />
  4. 4. Sample deposition by PLANAR MAGNETRON<br /><ul><li> TUMBLING
  5. 5. BCP
  6. 6. EP
  7. 7. SPUTTERING
  8. 8. CRYOGENICS</li></ul>6 GHz CAVITY mini-lab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
  9. 9. Sample deposition by PLANAR MAGNETRON<br /><ul><li> BALANCED PLANAR MAGNETRON
  10. 10. 2 INCHES TARGET</li></ul>NbSn<br />
  11. 11. Sample deposition by PLANAR MAGNETRON<br />Nb MAGNETRON<br />STEP MOTOR<br />14 cm<br />SAMPLE<br />OLDER<br />Sn MAGNETRON<br />
  12. 12. Sample deposition by PLANAR MAGNETRON<br />
  13. 13. Sample deposition by PLANAR MAGNETRON<br />MULTILAYER – ANALISI XRD<br />Only Nb3Sn peaks<br />
  14. 14. Sample deposition by PLANAR MAGNETRON<br />
  15. 15. Sample deposition by PLANAR MAGNETRON<br />Max RRR = 3,58<br />
  16. 16. Sample deposition by PLANAR MAGNETRON<br /><ul><li> TUMBLING
  17. 17. BCP
  18. 18. EP
  19. 19. SPUTTERING
  20. 20. CRYOGENICS</li></ul>6 GHz CAVITY minilab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
  21. 21. RSTRADITIONAL MEASUREMENTS Vs 6 GHz CAVITY<br />1,3 - 1,5 GHz <br />“Real” Cavities<br />Fabrication of Cavities<br />Usable for Accelerators<br />6 GHz <br />Dummy Cavities<br />Accordance to Reality <br />Sample RF Characterization<br />Basic<br />Research<br />
  22. 22. 6 GHz CAVITY MINILAB<br />------------<<<0>>>-------------<br /><ul><li> No electron beamwelding, neitherforflanges
  23. 23. Obtainedby spinning fromNbscraps
  24. 24. Short fabricationtime
  25. 25. Fast and low cost BCP and EP treatments (~ 3lt acids)
  26. 26. InexpensiveCryogenics, fast cooling and warming up
  27. 27. QuickRF Measurements (traditionalrf system) </li></li></ul><li>CavityGeometry<br />36 mm<br />Seamlessflanges<br />20 mm<br />Flange Area = 7 cm2<br />[mm]<br />
  28. 28.
  29. 29. Cavityfabrication<br /><ul><li> By Spinningfrom scraps of spun 1.5 GHz </li></ul>40 cm<br />6 GHz Cavity<br />1.5 GHz Cavity<br />
  30. 30. Low research budget  Large amount of cavities<br />6 GHz <br />
  31. 31. Mini MechanicalTumbling<br /> SiC<br />ZrO2<br />Al2O3 + SiO2<br />Turbula mixer<br />Willy Bachofen<br />http://www.wab.ch/<br />
  32. 32. Mini EP<br />
  33. 33. A Mini – BCP / EP Lab<br />
  34. 34. A Mini - Chemical/Electrochemical Lab<br />to <br />control unit<br />and<br />power supply<br />to the <br />pump<br />cavity<br /><ul><li> Max 3 litres of Acids and 3 hours of treatment</li></li></ul><li>6 GHz CAVITY MINI-furnace<br />
  35. 35. 6 GHz CAVITY MINI-Camera<br />
  36. 36. Ready for the RF measurement<br />
  37. 37. 6 GHz CAVITY: MINI-Kapton gasket<br />
  38. 38. Cryogenicinfrastructure:<br />The Bottom Part<br />Bottom Part<br />Pick-up-Pipe<br />Coupler - Pipe<br />Double Pumping line<br />Bellow<br />Coupler (mobile)<br />Coupler Flange<br />Coupler Antenna<br />Pick-up Flange<br />Pick Up<br />Pick-up Antenna<br />
  39. 39. Cryogenicinfrastructure:<br />Triple Stand<br />μ-metal <br />Screen<br />cavity<br />
  40. 40. Quick RF Measurements<br />The insert has been conceived to even enter into a 450 lt Helium dewar <br />INSERT<br />DEWAR<br />RF measuring system <br />
  41. 41. Sample deposition by PLANAR MAGNETRON<br /><ul><li> TUMBLING
  42. 42. BCP
  43. 43. EP
  44. 44. SPUTTERING
  45. 45. CRYOGENICS</li></ul>6 GHz CAVITY mini-lab<br />Cavity deposition by CYLINDRICAL MAGNETRON<br />6 GHz cavity RF TEST<br />
  46. 46. Idea: 1<br />CavityMotion<br />Magnet<br />Magnet<br />Sn<br />Nb<br />
  47. 47. Sn<br />Idea: 2<br />MagnetMotion<br />Nb<br />CavityMotion<br />
  48. 48. Nb<br />Idea: 3<br />Sncoil<br />CavityMotion<br />
  49. 49. Idea: 4<br />Nb<br />MagnetMotion<br />Sn<br />Nb<br />Sn<br />z<br />RotatingCavity<br />
  50. 50. Idea: 5<br />Nb<br />Sn<br />z<br />RotatingCavity<br />
  51. 51. Idea: Post. Cyl. 1<br />Idea: 6<br />CavityMotion<br />Nb<br />Sn<br />
  52. 52. Idea: Post. Cyl. 2<br />Idea: 7<br />Nb<br />Magnets<br />Sn<br />CavityMotion<br />Magnets<br />
  53. 53. Idea: 8<br />Sn<br />CavityMotion<br />Nb<br />Nb<br />
  54. 54. POST-MAGNETRON<br />GroundedScreen<br />Cooling<br />Cathode<br />Electricalfeedthrough<br />Water IN<br />Nb/Sn Target<br />Nb Target (wings)<br />Water OUT<br />Sn Target<br />ElectricalInsulator<br />Choosen magnetron sputtering configuration<br />
  55. 55. MULTILAYER – THE TARGET<br />Sn<br />Sn<br />Nb<br />Nb<br />Sn/Nbcathode area ratiodecided on the basisofsputteringyields<br />
  56. 56. Manipulator<br />Worm<br />Screw<br />MULTILAYER – CAVITY MOTION<br />CavityHolder<br />Linear <br />Feedthrough<br />
  57. 57. MULTILAYER – CAVITY MOTION<br />MANIPOLATORE<br />MOTOR STEP<br />
  58. 58. MULTILAYER – UHV CYLINDRICAL SYSTEM<br />Linear <br />Feedthrough<br />110 cm<br />Coil<br />23 cm<br />Cylindrical<br />Magnetron<br />45 cm<br />
  59. 59. Linear Feedthrough<br />Coil<br />Cavity<br />Window<br /> Water Cooling<br />Nb / Sn Cathode<br />MULTILAYER – UHV CYLINDRICAL SYSTEM<br />To The <br />Pump<br />
  60. 60. ANNEALING SYSTEM<br />
  61. 61. MULTILAYER – FIRST RF TEST RESULTS<br />1<br />
  62. 62. MULTILAYER DEPOSITION IN 6GHz CAVITY<br />
  63. 63. <ul><li>Possibilitytoperform a low cost and dense statistics
  64. 64. Actual measurement rate 30 cavities / month
  65. 65. Possible rate with 3 Cryostats 100 cavities / month</li></ul>Thank You<br />
  66. 66. Forthis and much more material, visitthe free download area on: <br />http://www.surfacetreatments.it/<br />http://www.slideshare.net/PalmieriProfEnzo<br />

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