Slicing the UniverseCCDs for MUSE

Roland Reissa, Sebastian Deiriesa, Jean Louis Lizona, Manfred Meyera, Javier Reyesa,

Roland Baconb, François Hénaultb, Magali Loupiasb

(a) European Southern Observatory (http://www.eso.org)Karl-Schwarzschild-Str. 2 D-85748 Garching by Munich, Germany

(b) CRAL - Observatoire de Lyon, 9 avenue Charles André, 69230 Saint-Genis-Laval, France

SDW 2005, Taormina Reiss et al., Slicing the Universe 2

Slicing the UniverseCCDs for MUSE

FO Tower IFUs Tower (X 3)

IFUs (X 2)

IFUs (X 2)

IFUs (X 2)

IFUs (X 2)

IFUs Tower baseplate

Nasmyth Platform basefloorNasmyth Platform basefloor

FO baseplate

MUSEAdaptiveOpticsSystem

Calibra-tionUnit

Calibra-tionUnit

Alignmenttools &

telescopesimulator

Nasmythflange

simulator(movable)

Nasmythflange plane

Field-Splitter

De-rotator

Re

lay

Op

tics

CalibrationPickups

1 & 2

Instrument baseframe

• MUSE (Multi Unit Spectral Explorer) is built by a consortium of European institutes(ESO, Göttingen, Leiden, Lyon, Toulouse, Zürich).

• 2nd generation instrument for the VLT.

• Integral field spectrometer for the Nasmyth focus.

• 24 Integral Field Units (IFU).

• 24 cryostats with one 4k x 4k CCD attached to IFUs.

SDW 2005, Taormina Reiss et al., Slicing the Universe 3

Compact CCD Head

• Low Frequency Pulse Tube Cooler.• Standard head for future ESO instruments.

SDW 2005, Taormina Reiss et al., Slicing the Universe 4

New General detector Controler (NGC)

R2 = R1R4

R3C1

R1

Q2

Q1

OUT-

OUT+from CCD Output

VDD

L1

Q3

Cascode CCD Buffer Stage• 2x gain of single buffer• Differential output

NGC configuration• One board per detector

SDW 2005, Taormina Reiss et al., Slicing the Universe 5

Detector Requirements

Item Value Remarks

Detector format 4096 x 4096or 2x 2048 x 4096

Pixel size 15 x 15 µm^2

QE 465 – 570 nm 85% min; 90% goal

QE 610 – 800 nm 85% min; 90% goal

QE 800 – 930 nm 60% min; 70% goal

Fringing < 10 % Peak-to-peak of avg. sensitivity

Fringe stability < 1% Within 24 hours

Flat field stability < 1% Per night

Charge diffusion < 0.1 pixel FWHM equivalent gaussion convolution

Surface flatness < 20 µm pp