Dielectric loaded cavity report Huy Phan McDaniel College - - PowerPoint PPT Presentation

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Dielectric loaded cavity report Huy Phan McDaniel College - - PowerPoint PPT Presentation

May 02, 2023 245 likes •378 views

Dielectric loaded cavity report Huy Phan McDaniel College Fermilab Objective Test out various dielectric materials used for cavity insert by simulation Measure expected quality factor and RF of test cavity using different insert.

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SLIDE 1

Dielectric loaded cavity report

Huy Phan McDaniel College Fermilab

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SLIDE 2

Objective

  • Test out various dielectric materials used for cavity insert by

simulation

  • Measure expected quality factor and RF of test cavity using different

insert.

  • Examine dielectric heating and thermal expansion for insert in test

cavity

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SLIDE 3

Sample cavity

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SLIDE 4

Insert properties

  • Alumina (L=2cm)
  • 97.6%, tanδ = 0.003, ε = 9, d = 1.40462cm
  • f = 536.88MHz, Q = 10145.1
  • 94%, tanδ = 0.00062, ε = 9, d = 1.536cm
  • f = 528.75MHz, Q = 5821.42
  • 96%, tanδ = 0.00044, ε = 9.2, d = 2.11074cm
  • f = 490.6MHZ, Q = 5018.09
  • 99.5%, tanδ = 0.00014, ε = 9.3, d = 2.5323cm
  • f = 461.13MHz, Q = 8834.86
  • 97.6%, tanδ = 0.0003, ε = 9, d = 0.8128cm
  • f = 564.85MHz, Q = 1544.4
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SLIDE 5
  • MCT (ε = 35, tube, dout=1.03cm, din=0.6cm, L =7cm)
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SLIDE 6
  • MCT (ε = 20, tube, L = 4.94cm, dout=2.93cm, din=0.54cm,f =

347.87MHz)

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SLIDE 7
  • Alumina(ε = 9.7, tube, L = 7cm, dout=2.4cm, din=1.03cm, f =

482.96MHz)

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SLIDE 8
  • Forsterite(ε = 6.64, tube, L = 10cm, dout=0.9cm, din=0.7cm, f =

574.97MHz)

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SLIDE 9
  • Corderite(ε = 4.6, tube, L = 2.8cm, dout=1.5cm, din=0.55cm, f =

560.09MHz)

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SLIDE 10

Simulation for alumina insert

  • Insert: alumina, rod, diameter = 2cm, length = 2cm
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SLIDE 11

Alumina insert with different purity and loss tangent (L = 2cm, d = 2cm)

tanδ\ε 8.6 8.7 8.8 8.9 9 9.1 9.2 9.3 9.4 9.5 0.0001 12581.9 12530.4 12479.6 12429.4 12379.8 12330.9 12282.5 12234.8 12187.7 12141.1 0.0002 9190.61 9140.95 9092.07 9043.97 8996.63 8950.01 8904.12 8858.93 8814.43 8770.6 0.0003 7239.34 7194.78 7150.99 7107.97 7065.7 7024.15 6983.3 6943.15 6903.67 6864.84 0.0004 5971.52 5931.85 5892.9 5854.68 5817.17 5780.33 5744.16 5708.63 5673.73 5639.45 0.0005 5081.59 5046.09 5011.26 4977.11 4943.62 4910.75 4878.5 4846.85 4815.77 4785.27 0.0006 4422.51 4390.49 4359.09 4328.33 4298.17 4268.59 4239.58 4211.13 4183.2 4155.81 0.0007 3914.76 3885.65 3857.12 3829.18 3801.8 3774.96 3748.64 3722.83 3697.52 3672.69

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SLIDE 12
  • Currently working on
  • Heating and thermal expansion of insert in test cavity
  • Cooling method for overheating.
  • Future work
  • Dielectric sample test with actual cavity