Design, assembly and test of a near-infrared spectrograph for the TIGRE telescope

(1)

Christian Kintziger – ckintziger@ulg.ac.be STAR Workshop

15/09/2017

Design, assembly and test of a near-infrared

spectrograph for the TIGRE telescope

STAR Workshop

15/09/2017 – Mont Rigi

(2)

 Project overview

 PhD summary

 Instrument performances

 Observation

 Conclusion

3 Project overview – Why studying massive stars ?

They are key players for the evolution of the universe !

 Massive? Initial mass above 8 𝑀

_𝑆𝑢𝑛

→ Production of heavy elements

 High temperature: 20000𝐾 → 120000𝐾

 Mass loss: 10

−7

→ 10

−3

𝑀

_𝑠𝑢𝑛

𝑦𝑟

−1

→ Stellar wind ≫

(4)

 Near-IR spectrograph

→ mounted on the TIGRE

(ground)

 UV observing nano-satellite

→

feasibility study

(space)

 UV-VIS Spectropolarimeter

→ pre-phase-A and phase-A

(space)

(5)

STAR Workshop

15/09/2017

5  Resolving power needed:

10 000

(goal 20 000)

 Spectral domain:

1 to 1,1 𝜇𝑚

 Detector trade-off:

→ CCD or specific IR detector ?

 Versatile interface:

→ fibre-fed

 Should be adaptable to other

telescopes (ARIES)

(6)

From scientific

requirements to

instrumental

specification

Optical design

Photometric

budget

Alignment and

tests in

laboratory

First light

PhD summary– Flowchart

First scratch,

resolution power,

tolerancing,

calibration,

straylight,

alignment, SPS, …

@ TIGRE,

@ Liège,

SPS,

observing strategy

Assemble and

align optical

components

First light ? Debugging, first light ? Debugging, first light ?

Debugging …

Bibliography on

spectroscopy,

fibers, detector

(7)

STAR Workshop

15/09/2017

7

Focal plane with HCL lamp minus dark

100 200 300 400 500 600 50 100 150 200 250 300 350 400 450 500

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(9)

STAR Workshop

15/09/2017

9 Scientific

requirements,

choice of

detector, first

optical design

End optical

design, purchase

components

Integration,

Testing

activities

Test activities,

first light in

Liège

2013-2014

2014-2015

2015-2016

2016-2017

IR Spectrograph

Different instruments,

same goal… study

massive stars!

From scientific

requirements to first

light

Performances are

validated in lab

First light: coming soon!

Conclusion

(10)

Thank you for your attention

Design, assembly and test of a near-infrared spectrograph for the TIGRE telescope

Design, assembly and test of a near-infrared

spectrograph for the TIGRE telescope

STAR Workshop

15/09/2017 – Mont Rigi

 Project overview

 PhD summary

 Instrument performances

 Observation

 Conclusion

Table of contents

3

Project overview – Why studying massive stars ?

They are key players for the evolution of the universe !

 Massive? Initial mass above 8 𝑀

𝑆𝑢𝑛

→ Production of heavy elements

 High temperature: 20000𝐾 → 120000𝐾

 Mass loss: 10

−7

→ 10

−3

𝑀

𝑠𝑢𝑛

𝑦𝑟

−1

→ Stellar wind ≫

 Near-IR spectrograph

→ mounted on the TIGRE

(ground)

 UV observing nano-satellite

→

feasibility study

(space)

 UV-VIS Spectropolarimeter

→ pre-phase-A and phase-A

(space)

5

 Resolving power needed:

10 000

(goal 20 000)

 Spectral domain:

1 to 1,1 𝜇𝑚

 Detector trade-off:

→ CCD or specific IR detector ?

 Versatile interface:

→ fibre-fed

 Should be adaptable to other

telescopes (ARIES)

From scientific

requirements to

instrumental

specification

Optical design

Photometric

budget

Alignment and

tests in

laboratory

First light

PhD summary– Flowchart

First scratch,

resolution power,

tolerancing,

calibration,

straylight,

alignment, SPS, …

@ TIGRE,

@ Liège,

SPS,

observing strategy

Assemble and

align optical

components

Bibliography on

spectroscopy,

fibers, detector

7

9

Scientific

_𝑆𝑢𝑛

_𝑠𝑢𝑛