All-hands meeting 31st Jan 2007 Anna Moore

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Palomar: Cosmic Web Imager

Who are CWI?Khanh Bui (Structure design)Daphne Chang (Opto-mechanical lead, GRA)Matt Matuszewski (Grating, articulation unit, GRA)Chris Martin (PI)Anna Moore (System Lead)Patrick Morrissey (Detector)Shahin Rahman (Software, GRA)

What is CWI?Optical spectrograph for 200” Hale telescope designed specifically for high resolution spectroscopy of low-surface-brightness extended emission with exquisite sky background subtractionBased on slicer-IFU, 50” FoV, R~5000

Science goal:Science goal is to directly detect faint cosmic web and circum-galactic medium emission at high redshiftsFirst light late 2008

CWI shown mounted to the Cassegrain station of the 200” Hale telescope, without enclosure

All-hands meeting 31st Jan 2007 Anna Moore

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Palomar: Cosmic Web Imager

IFU

Collimator

VPH grating

Camera and dewar

The camera and dewar assembly must rotate about the center of the

grating

Side view/zenith pointing

All-hands meeting 31st Jan 2007 Anna Moore

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Infrared Imaging Spectrograph(IRIS) Concept Design

James Larkin PI (UCLA)

Anna Moore co-PI (Caltech)

First light instrument for TMT (2016?)

~1 year CODR study with review in Feb 2009

~450k study, 1/3rd to COO

0.8-2.5mm, imager and IFU R<4000

Imager: FoV 10” goal

IFU(lenslet): 4/9 mas/pixel; 2” FoV

IFU(slicer): 22/50 mas/pixel

Spectrograph offers high strehl lenslet and high efficiency slicer

Large part of CODR is to combine lenslet and slicer optics efficiently

All-hands meeting 31st Jan 2007 Anna Moore

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2.25m

IRIS Envelope Dimensions

The generic instrument envelope is a 2m dia. cylinder extending 3.75m axially from the interface plane– A “snout” portion protrudes

0.5m into NFIRAOS

– Maximum total instrument length = 4.25m

The instrument centre of mass is required to lie on axis, 2.25m from the interface plane

4.25m

SNOUT 0.5m

ROTATOR BEARING e.g.

ROLLIX 02-1415-00

C of M (5T)

INTERFACE PLANE