MTA-Beam,%20Solenoid,%20Cavity

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MTA-Beam, Solenoid, Cavity

• HP-Vacuum, Cryo-RT
• RF Cavity
• Milorad Popovic
• FNAL

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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

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Test Results with Mark II
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Test Results with Mark II
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Cavity, 806.8MHz, gap 12.6
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Cavity, 800.0MHz, gap 12.4
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Cavity, Mark III
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Pull out, 0.2cm
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Push in, 0.2cm
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Sliding plate, -1cm
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Sliding plate, 1cm
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Closed Cell, Sliding plate
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Closed Cell, Sliding plate, 3cm
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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.

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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

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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?
• ..
• ..