Astronomical Telescopes and Instrumentation

1
Astronomical Telescopes and Instrumentation

• Power Telescopes and Instrumentation into the New
  Millennium
• 22-28 August 2002
• Hilton Waikoloa Village Hotel, Hawaii

2
ASTRONOMICAL TELESCOPES AND INSTRUMENTATION

• 28 Conferences in seven technology tracks
• Astronomy with Large Telescopes
• UVOIR Ground Instruments
• Astronomy Information Technologies
• Space Telescopes and Instruments
• Millimeter and Submillimeter Detectors
• Astronomy Outside the EM Spectrum
• Astrobiology

3
Astronomy with Large Telescopes
Program Chair Alan
Dressler, AS01 Discoveries and Research
Prospects from 6-10m Class Telescopes II AS02
Future Research Direction and Visions for
Astronomy AS03 Survey and Other Telescope
Technologies and Discoveries AS04 Large
Ground-Based Telescopes AS05 Interferometry
for Optical Astronomy II AS06 Adaptive Optical
System Technologies II AS07 Future Giant
Telescopes
4
UVOIR Ground Instruments
Program Chair Douglas A. Simons AS08
Instrument Design and Performance for
Optical/Infrared
Ground-Based Telescopes AS09 Specialized
Optical Developments in Astronomy AS10
Polarimetry in Astronomy AS20 Innovative
Telescopes and Instrumentation for Solar
Astrophysics
5
LGS AO (Lick)

• Gavel FL 9/96
• Eng 12N, Sci 32N.
• lt18Wgt Na
• 40 subap, 61 act
• Strehl 0.2-0.7 depending on r0.
• Space Command no shutdowns since Jan.

6
LGS AO (Keck)

• Pennington FL 12/01.
• lt17Wgt Na
• Delivered 98. 2 yrs to field harden
• Setup 2-3 days 2-4hrs per night.
• Safety boresight IR spotter.
• Downtime 1 month to install.

7
LGS AO (Mt Wilson)

• Thompson FL ??
• 3-mirror coude
• 33W 350nm excimer
• 333Hz h18km
• 177 act DM
• d06.5m _at_ 2?m

8
LGS AO (MMT)

• Loyd-Hart FL ??
• 5 Rayleigh (5W)
• 2 10km range gates 5 12x12 S-H
  30km Ngt2 5 3x3 S-H 40km N2 1 tip-tilt
  NGS
• Adapt sec _at_ 0km
• 250 act DM _at_ 6km

9
Detectors (Beletic)

• Waimea Workshop 2002
• EEVgtMarconigtE2V LoralgtFairchild SBRCgtRatheon
• Fairchild STA now producing 4kx4k devices
• Fairchild 9kx9k CCD595 _at_ 30 e-
• CMOS/CCD CCD best scientific, CMOS faster rad
  hard CCD/CMOS hybrids ?
• E2V L3CCD noise problem ?
• Raytheon Orion 2k2 Insb, Virgo 2k2 HgCdTe (2?,
  5?) 4k2 in 04?
• Rockwell Hawaii 2RG QE 75 J-K 5e- rms with
  NDR

10
OSIRIS (Larkin)
3D IR IFS to work with Keck AO
11
Optical Design
Spectrograph
Collimator Optics
Lenslet Array
Cold Pupil
AO Focus
Grating
Filters
Pupil Plane
R.I. Camera Singlet
R. I. Collimating Singlet
Camera Optics
Focal Plane
Lenslet
Detector
Lenslet arrays 72x72 AR-coated fused silica MEMS
optical 45k
Reimaging Optics
12
Two Operational Modes

• Selected by mask over lenslets
• Broad band (z, J, H or K)
• 16x64 lenslets
• 1024 lenslets each with
• 1700 spectral pixels
• Narrow band (19 filters)
• 40-64x64 lenslets
• up to 4096 spectra
• 400 spectral pixels each.
• 23 possible spectra
• R3900

13
Fixed Grating

• Blazing the grating at 6.5 microns places each
  order within different bands.
• Hyperfine direct ruling into gold coating (eff
  75).

14
Mechanical Design

• Box-like dewar on rails
• Kinematically mounted cryogenic
• optical bench
• Four cryogenic mechanisms
• One 24 position filter wheel
• Two lens carousels
• Aperture mask slide
• No varying gravity vector
• No moving optical elements from lenslet array to
  detector
• No changing stresses on optical plate

15
OSIRIS Team

• ACADEMIC
• P.I. - James Larkin (UCLA)
• Project Scientist - Andreas Quirrenbach (UCSD)
• Co. P. I. Alfred Krabbe (UCB)
• CARA Project Manager David Sprayberry
• Research Astronomer Inseok Song
• Graduate Students - Matthew Barczys, David
  LaFreniere, Michael McElwain
• Close collaboration Ian McLean, Eric Becklin
• ENGINEERING ( shows lead engineer in each area
  for OSIRIS)
• Project Engineer - George Brims
• Mechanical Ted Aliado, John Canfield, Nick
  Magnone, Evan Kress
• Software Tom Gasaway, John Milburn, Jason
  Weiss
• Electrical Michael Spencer, Gunnar Skulason
• CARA also provides significant engineering help.
• ADMINISTRATIVE
• Management Juleen Moon, Jim Kolonko
• Secretarial Melinda Laranetta

Cost 2.5M
16
M O I R C S
Tohoku University, NOAO, Subaru
F.O.V. 4arcmin x
7arcmin Imaging Multi-Slit Spectroscopy Optimiz
ed Wavelength 0.8 - 2.5 um Spectral
Resolutions 500 - 2000 Filters
z, J, H, K Detector
two 2048x2048 pixel HgCdTe
arrays Masks Capacity 24
masks Efficiency Imaging
0.34 / Spectroscopy 0.20 Limited Magnitudes
Imaging 1hr,S/N10
J23.8mag,H23.1mag,K22.3mag
Spectroscopy
R500,4hr,S/N5
J21.3mag, H20.8mag, K20.0mag
17
M O I R C S
18
M O I R C S
19
MASK EXCHANGE SYSTEM