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The KMOS Project^*1

• Daigo Tomono (MPE)
• PI: R. Bender (MPE, LMU)
• Co-Is: R. Hofmann (MPE), R.M. Sharples (Univ. Durham)

Who am I?

Daigo Tomono

• dtomono at freeshell.org
• <URL:http://www.rzg.mpg.de/~tomono/>

What is KMOS?

• K-band Multi Object Spectrometer
• 2nd generation VLT instrument
• Follow-up obs. for high-z object surveys
• J, H, and K-band (1-2.5mm) simultaneous obs.
• Spectral resolution: R=l/Dl~4000
• Spatial resolution: 0.2"
• IFU FOV: ~2"(10x10 spatial elements
• Number of IFUs: ~20
• IFU patrol field: 7.2'(Nasmyth)

What is KMOS project?

Collabration of German and UK institutes. Those who are involved in the German side are:

• R. Bender
• R. Genzel
• Y. Harayama
• A. Hess
• R. Hofmann
• M. Lehnert
• B. Muschielok
• J. Richter
• S. Rieger
• D. Tomono

Topics

• Optics

  • Slit and multi-object spectrograph: Deployable IFUs
  • Pre-optics: Cold stop for IR observations
  • Field lens
• Reconfiguration Robot
• Schedule

Grating spectrograph

an example field

with a slit spectrograph

with deployable IFUs

Deployable fiber IFU

• Micro-lens array on focal plane
• Connection with <1m of low-OH fibers
• 1D micro-lens array on pseudo-slit

An example: single IFU

CIRPASS (Gemini-S) <URL:http://www.ast.cam.ac.uk/~optics/cirpass/>

• IoA in Cambridge, UK
• 0.85-1.8mm
• fiber-fed
• 490 elements
• 2 pix/element

Pre-optics and cold stop

• Cold stop: Blackbody radiation in K-band(2.2mm)
• Magnification of the image: Micro-lens array can not made too small
• Telecentricity: Optical axis on each lens in micro lens array

Background from the telescope

Re-imaging optics for background reduction

Pre-optics with cold stop

• Images pupil on cold stop
• Adjusts plate scale
• Makes telecentric beam

Field lens

Beam direction changes depending upon field position

Field lens

• Spherical focal 'plane'
• Concentric beam
• IFUs are mounted on the focal sphere

The Robot

• Moves IFUs onto the targets
• Simple design for cryogenic operation

The Robot -under cryogenic test

• IFUs are held by magnets
• 3 motors for all IFUs
• Too slow??

The Robot -under consideration

• 2 degrees of freedom
• Each IFU has 2 motors
• Moves on the focal sphere
• Proto-type to be manufactured

Preliminary schedule

• Study phase - Dec 2003
• Pre design - Jan 2005
• Final design - Nov 2005
• Manufacturing - Jul 2007
• Test - Jul 2008
• Commissioning Oct 2008 -

Still a long way to observe these...

Vielen Dank!

Daigo Tomono

• tomono at mpe.mpg.de
• <URL:http://www.rzg.mpg.de/~tomono/>

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^*1November 6, 2002 at MPE Konzil 2002 in Kloster Seeon