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MTA-Beam, Solenoid, Cavity

HP-Vacuum, Cryo-RT RF Cavity Milorad Popovic FNAL. MTA-Beam, Solenoid, Cavity. Motivation. Design cavity than can be operated & tested : As Open or Closed Cell Cavity Under High Pressure ~1000psi or Vacuum ~10e-7 With 400MeV Proton Beam At Room Temperature At Liquid Nitrogen Temperature

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MTA-Beam, Solenoid, Cavity

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  1. HP-Vacuum, Cryo-RT RF Cavity Milorad Popovic FNAL MTA-Beam, Solenoid, Cavity MuCool Test Area RF Workshop, August 22, 2007 — Fermilab

  2. Motivation • Design cavity than can be operated & tested: • As Open or Closed Cell Cavity • Under High Pressure ~1000psi or Vacuum ~10e-7 • With 400MeV Proton Beam • At Room Temperature • At Liquid Nitrogen Temperature • With ~ 4 Tesla Magnetic Field MuCool Test Area RF Workshop

  3. Test Results with Mark II

  4. Test Results with Mark II

  5. Cavity, 806.8MHz, gap 12.6

  6. Cavity, 800.0MHz, gap 12.4

  7. Cavity, Mark III

  8. Pull out, 0.2cm MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  9. Push in, 0.2cm MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  10. Sliding plate, -1cm MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  11. Sliding plate, +1cm MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  12. Closed Cell, Sliding plate MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  13. Closed Cell, Sliding plate, 3cm MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  14. From SuperFish Field normalization (NORM = 1): EZEROT = 7.57000 MV/m Frequency = 812.24775 MHz Stored energy = 4.8554590 Joules Using standard room-temperature copper. Power dissipation = 999.4979 kW Q = 24792.3 Shunt impedance = 46.594 MOhm/m r/Q = 181.305 Ohm Average magnetic field on the outer wall = 25422.6 A/m Maximum H (at Z,R = 11,4) = 62077.6 A/m Maximum E (at Z,R = 7.42678,3.55781) = 63.5013 MV/m, 2.42769 Kilp. MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  15. RF Power Segment Zend Rend Emax Power (cm) (cm) (MV/m) (kW) ---------------------------------------------------------- -14.000 0.0000 1 -14.000 2.8000 0.1098 7.9891E-06 2 -7.0000 2.8000 19.52 0.1439 3 -7.0000 4.0000 62.27 10.90 4 -10.000 4.0000 42.74 89.79 5 -10.000 7.0000 5.114 86.31 6 -10.000 12.000 5.110 121.6 7 11.000 12.000 1.645 381.5 8 11.000 7.0000 5.115 121.8 9 11.000 4.0000 5.146 86.41 10 8.0000 4.0000 38.83 89.92 11 8.0000 2.8000 63.50 10.96 12 14.000 2.8000 21.42 0.1438 ---------------------------------------------------------- Total 999.5 MuCool Test Area RF Workshop August 22, 2007 — Fermilab

  16. Questions Mechanical Design - Safety RF Engineering Design Diagnostics; Rf pickup Fiber, for light pickup X-ray detectors (pin diodes?) ….. Do we wont larger beam pipe? Do we wont large accelerating gap? Do we wont highest peak E field? Do we wont as little as possible of H gas? Do we wont different materials in the beam? All these tests cannot be done like last time, over few weekends, can we get longer periods of time, weeks ..! Do we wont short/long beam pulses? Is there more tests to be done? ….. .. MuCool Test Area RF Workshop August 22, 2007 — Fermilab

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