RxH3 Mechanical Hardware Review

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RxH3 Mechanical HardwareReview

• Aim
• Review mechanical requirements
• Describe items completed
• design
• current location
• Flag outstanding items

Mauna Kea Summit showing UKIRT, JCMT and
holography signal
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Overview of Components (Main supplier ID in
brackets)

• Source (RAL/MRAO)
• Source mount (JAC/MRAO)
• Receiver (RAL/MRAO)
• Receiver Mount (JAC/RAL)
• Optical Relay Mount (JAC)
• Optical Relay Mirror (MRAO)
• Infrastructure (JAC)

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Source

• Source
• Built and at MRAO.
• Source Mount (Adjustable).
• Designed
• Built and at MRAO

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More source images
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Source Mount

• UKIRT wall hole bracket
• bracket designed on order at JAC (460)
• hole to be ready by end Nov.99 (800?)
• 6 dia.
• 8.6 deg down angle

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Source WindowAim duplicate existing hole
window

• Problem no documentation on window/frame
• Window either 6mm PTFE or Gore-Tex membrane.
• Frame sealant non-critical.
• Required
• Design check (IP)
• Window/clamp design order by Nov.99
• Cost 100-200

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Receiver RxH3(built and at MRAO)
View on front View on side
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Receiver Mount in JCMT Rx Cabin

• Cabin Mounting arms LH RH (JAC). Built and at
  JAC (micro lab)
• Receiver base (Made by RAL, at MRAO, ships with
  RxH3).

Slider Arm Dowel
Although true rack sliders have not been
provided, the design allows for a sliding
interface of RxH3 on its baseplate and the
interface rail (blue).
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Receiver mount in cabin RAL drawing
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Optical Relay
The optical relay is one of the most complex
areas of the JAC infrastructure in terms of
geometric layout and alignment requirements. Four
slides detail this area

• Initial Survey
• Design
• Components
• Hole Cutting Alignment Procedure

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Optical Relay Survey

• initial calc and sketches by REH
• IP string wire survey
• final calcs
• 3D CAD design

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Optical Relay Design
Mirrors (2)
Mirror mounts (2)
Mounts in JAC microwave lab Mirrors 1 in JAC
micro lab, 1 at summit in Receiver Prep Room
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Optical Relay layout view
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Optical Relay Hole Cutting Alignment Procedure

• Install Mounts
• Align to nominal dimensions and positions
• drill and tap structure for mounting bolts
• Add mirrors to mounts
• Hole Cutting
• position RxH3 in bay and identify rough hole
  locn and/or infer from drawing geometry. Cut
  hole.
• Cut hole in right place
• Align mirrors (on holey panel centre)
• by eye initially check mirrors see hole etc
• install RxH3 and use laser to align optical axis
• Check no obstructions to beam
• structural members (Echo-sorb?)
• cables
• Surface Electronics

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Mechanical Infrastructure

• Miscellaneous infrastructure includes
• The Holey-Panel which the reference holography
  beam passes through.
• A move of the IF patch panel required to provide
  space for RxH3. This required re-design work.
• A mount to allow the RxH3 control micro to be
  located in the cabin.

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Infrastructure Holey-Panel

• re-installed in 1998

Also Required Panel insulation echo-sorb (on
order)
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Infrastructure Patch panel

• design new patch panel for lower bay (done)
• Manufacture (done)
• Install swap over (Rx cabin installation in
  progress Oct.99)

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Infrastructure Micro-Mount

• Mount for RxH3 control micro.
• Locates just above patch panel
• Shared micro with Surface control electronics
• Built and at JAC (microwave lab)

Micro mount additional space Interface to Rx
cabin rails
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Summary of outstanding items

• Source
• Hole cutting
• Hole Window
• wall bracket
• When RxH3 arrives
• Cut hole in Rx cabin roof
• Mount mirrors align