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Ohana Delay Line

• Installation at the summit
• Friday, October 13th 06
• Pierre Fedou, LESIA

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Agenda

1. Background
2. Delay Line Installation
3. Road Map

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Background

• Ohana will connect
• CFHT and Gemini telescopes
• Via a fiber link

Main sub systems - Injection modules - Optical
fiber links - Delay Line, ? our topic today -
Beam combiner and IR camera
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Background
Injection modules status

• CFHT Jun and Aug 02,
• J, H, K band
• Keck I, Dec 02, K
• Gemini, Jul 03,
• H, K

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Background
Fiber link status

• Keck, installation Aug 04
• Tests Dec 04, Jun 05, K band
• May 06, H and K

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Background
Beam combiner IR camera status

• Jun 03 Oct 03 on IOTA,
• H, K band
• Jun 06, J, H, K

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Delay Line

• Designed in 03 and before
• Built and tested, in France, mid 04 to mid 06
• Now ready to be re-installed at CFHT

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Delay Line
Translating stage
Translating stage
Input 1
Input 2
Fast scan
Central carriage
Output 2
Output 1
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Delay Line

• 3 or 4 missions of 3 weeks
• Oct 06 Hardware
• Jan 07 Opto-mechanical first lignment
• Mar 07 Alignment continued
• May 07 Optional

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Delay line subsystem

• Translating stage Aerotech
• Translating stage Schneeberger
• Central carriage
• Railways
• 6 metallic frames
• Fast Scan
• One computer

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Dec 03
Module 1, version 1.0
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New Module 1
Stone
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SchneeBerger end
Aerotech end
Control command
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Schneeberger end, looking outside
Schneeberger trans. stage
Central carriage
Module 6
Module 5
rails
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Schneeberger end, looking inside
Module 3
rails
Module 4
Module 5
Central carriage
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Aerotech end, looking outside
Aerotech translation stage
Module 1
Driving belt
MeterDrive
Stone
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Aerotech end, looking inside
Aerotech
Stone
Module 1
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Delay line

• Our goals for this mission
• Opening crates
• Moving big hardware in Coude Room
• Make first alignment of structure
• Rails positioning 1 mm over 12.50 m

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Delay line

• Here is the line just before leaving

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Delay line

• And now at the summit

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Delay line
The 7th crate concerns injection modules
7 crates 6 1 2 metallic frames 2 metallic
frames Aero metallic frame Schnee metallic
frame Rails Aerotech on its stone bed
Open question where do we stock this
7th? Closed? Opened?
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Delay line
OK, lets open crates!
Nail draw
Hammer
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Delay line
One module weighs 80 kg and is 210 cm long
One crate, two modules
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Delay line
Small parcels
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Delay line
rails
Small parcel
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Delay line
wedges
Need a (transportable) lifting jack
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Delay line
Metallic paper
Thermal soldering
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Delay line
Vacuum cleaner
Thermal soldering
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Delay line
Stabilized air
Plastic film
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Delay line
Ready to be closed
In progress
Wedge
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Delay line
Wall of wood
Wedge
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Delay line
Need a Nail Puller?
Electric Hammer
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Delay line
Roof of wood
Plastic film
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Delay line
We did it!
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Delay line
Aerotech side
Beam combiner Table
Schnee side
Total Length 14390mm Total Width 930mm
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Delay line
Beam combiner Table
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Delay line
Week 1, Monday 16th crates opened and all
heavy parts moved in the Coude Room, Day Crew and
Meudon Week 2, Monday 23rd small pieces are
moved and alignment made by Meudon Week 3,
Monday 30th continued, overturning, extra time
just in case
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Road map

• Delay Line installation Oct 06 -gt spring 07
• Injection Modules time has been asked on Keck
• Fiber Link beetween Gemini and CFHT summer 07
• Beam Combiner installation spring to summer 07
• Determination of length of the base on going
  effort with IGN and OCA
• First light when ready, fall 07?