ADMX 2A Cavity Array Mechanical Design J. Gleason, D. Tanner, N. - - PowerPoint PPT Presentation

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admx 2a cavity array mechanical design
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ADMX 2A Cavity Array Mechanical Design J. Gleason, D. Tanner, N. - - PowerPoint PPT Presentation

Feb 17, 2023 262 likes •483 views

ADMX 2A Cavity Array Mechanical Design J. Gleason, D. Tanner, N. Sullivan, J. Yang 2A Cavity Array Fabrication Deliverables Cavity array core assembly Interface to insert components Assembly / test fixtures Crating /

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SLIDE 1

ADMX 2A Cavity Array Mechanical Design

  • J. Gleason, D. Tanner, N. Sullivan, J. Yang
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SLIDE 2

2A Cavity Array Fabrication Deliverables

2A core and interface components

  • Cavity array core assembly
  • Interface to insert components
  • Assembly / test fixtures
  • Crating / shipping components
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SLIDE 3

2A Cavity Array Core Assembly Overview

  • Based on Prototype v2 design
  • Cavity ID and coarse tuning rod OD scaled by

2.85 à tuning range 1.5 - 2.2 GHz

  • Cavity length scaled by 5.5 to 37.85”
  • 76 liters volume
  • 76 kg

Prototype v2 2A

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SLIDE 4

Coarse Tuning

Coarse Tuning Assembly Coarse Tuning Upper Wheel ZrO2 Bearings Axle Sapphire Pin Coarse Tuning Rod

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SLIDE 5

Coarse Tuning Offset Adjustment +/- ~100 MHz Bearing preload adjustment Centering guide pin holes Flexures

Coarse Tuning Wheel Design

  • Similar flexure design to prototype.
  • Added light-weighting, individual centering holes,

and thermal anchor points Prototype v2 2A Thermal anchor points

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SLIDE 6

Prototype

Rod Mounting

  • Identical mounting scheme to prototype with

addition of metal lock nuts and increased spring tensions

2A

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SLIDE 7

Coarse Tuning Rod Design

  • Tube material 1.0” ID x 1.13 OD
  • 99.99% C101 Cu
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SLIDE 8

Expansion Plug

Coarse Tuning Rotary Stage Coupling

AttoCube rotary stage Delrin Coupler

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SLIDE 9

Fine Tuning Actuator Assembly (2A)

Fine tuning sapphire rod Actuator to rod coupler AttoCube linear actuator

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SLIDE 10

Fine Tuning (2A)

  • Rod holder to RF shroud gap = 0.010”
  • Minimum length of gap is 12mm
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SLIDE 11

Fine Tuning (2A)

  • PEEK / Nylon thermal isolation
  • Screw pattern for copper braid to intermediate cold plate
  • Tuning rod to cavity end plate gap = 0.010”
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SLIDE 12

Critically Coupled Antenna Actuation

  • Same as prototype with smaller RG405 cable
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SLIDE 13

Linear Actuator Placement

  • Extra space allows all actuators on top
  • shorter cable runs
  • 9% greater cavity volume
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SLIDE 14

CC antenna ports

End Plate Design

  • Misc. pass through

Fine tuning ports WC ports Centering guide pin holes Bearing recess Coarse tuning pin slots

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SLIDE 15

Tube Design Details

  • Cu plated SS
  • 0.120” nominal wall thickness
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SLIDE 16

Tube to End Plate Interface (2A)

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SLIDE 17

Tube to End Plate Interface (2A)

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SLIDE 18

Interfacing to ADMX Insert

DF mounting screw pattern Squidadel mounting screw pattern Shortened 1K support rods Actuator cable routing holes Cold cavity core support bars Cold cavity core suspension plate

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SLIDE 19

Interfacing to ADMX Insert

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SLIDE 20

Actuator Test Rig

  • Duplicates operating conditions for

linear and rotary actuators

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SLIDE 21

Upper Coarse Tuning Wheel Axle Antenna Actuator Coarse Tuning Rod Fine Tuning Linear Stage Coarse Tuning Rotary Stage Cavity Upper Bearing Fine Tuning Rod Critically Coupled Antenna