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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

CFHT Jun and Aug 02,

J, H, K band

Keck I, Dec 02, K

Gemini, Jul 03,

H, K

Injection modules status

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Background

Keck, installation Aug 04

Tests: Dec 04, Jun 05, K band

May 06, H and K

Fiber link status

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Background

Jun 03 & Oct 03 on IOTA,

H, K band

Jun 06, J, H, K

Beam combiner

& IR camera status

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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

Input #1Input #2

Output #1 Output #2Central carriage

Translating stage Translating stage

Fast scan

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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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Module #6

Module #5

rails

Schneeberger trans. stage

Schneeberger end, looking outside

Central carriage

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Central carriage

Module #3

rails

Schneeberger end, looking inside

Module #5

Module #4

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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

Stone

Aerotech

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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• Here is the line just before leaving

Delay line

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Delay line

And now at the summit

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7 crates: 6 + 1

2 metallic frames

2 metallic frames

Aero metallic frame

Schnee metallic frame

Rails

Aerotech on its stone bed

The 7th crate concerns injection modules

Delay line

Open question:

where do we stock this 7th?

Closed? Opened?

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Delay lineOK, let’s 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

Thermal soldering

Metallic paper

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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

In progress

Ready to be closed

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

Plastic film

Roof of wood

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Delay line

We did it!

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Delay line

Aerotech side

Schnee side

Beam combiner Table

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 -> 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?