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THE LARGE FORMAT 2Kx4K  PIXEL DEVICES

The following pages contain information on the AAO's commissioned devices from the MIT/Lincoln Labs/University if Hawaii large format detector consortium, and form EEV.
  1. MITLL3 - Deep Depletion Device 

  2. MITLL3 has been returned to service - 28 August 2002.
  3. EEV2 - A blue sensitive 2Kx4K EEV CCD is also available. 

  4.  
  5. MITLL2A - Lumogen coated Epitaxial Silicon (post-Mar 2000) 

  6. MITLL2A is no longer offered - 28 August 2002.
  7. MITLL2- Lumogen coated Epitaxial Silicon (pre-Mar 2000) 
  8. Serial Links 
The MITLL3 is available for common use on Taurus, UCLES, UHRF and RGO Spectrograph.
 
 
August 2002 - MITLL3 and MITLL2a suffered failures in 2002A. MITLL3 has been repaied and returned to service. MITLL2A cannot be repaired and is no longer offered.
 

March 2000 - MITLL2 suffered a catastrophic failure in January 2000. This was due to a design flaw in our Oxford Instruments dewars, which saw weakened dewar support struts chew Al shavings from the dewar wall. These worked their way throughout the dewar, and appear to have enventually damaged the on-chip amplifier then in use.

In March 2000, the chip was returned to Epping, where John Barton swapped its operation to the other amplifier. From this date forward the device was known as MITLL2A.  As of April 6, it has successfully been used on UCLES. See the MITLL2A page for further information.

  • UHRF  and UCLES Observers must note that dark-current levels which have been observed at the telescope may compromise their observations of faint targets, unless their detector can be mounted well in advance of their run. The AAO will make every effort to ensure this is done. Nonethless, observers are strongly advised to read the following report
  • The page on Serial Links contains some information on the serial links used to transfer data between the CCD Controllers out on the telescope and the Large External Memory (XMEM) which composes the images for you. Because of the huge data rates required move these 0.3Gbit images in a reasonable amount of time, they revealed shortcomings in our "copper" serial links. In particular NONASTRO speed is not available unless one of the new optical fibre links is used. 



©Anglo-Australian Observatory 1998, PO Box 296, Epping NSW 1710 Australia

 
 
 
 

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Chris Tinney,  MITLL Project Scientist  cgt@aaoepp.aao.gov.au

April 2000