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Graeme Carrad Theme Leader – Technologies for Radio Astronomy CSIRO Astronomy and Space Science

Australia Telescope Users Committee Technologies Report – October 2011. Graeme Carrad Theme Leader – Technologies for Radio Astronomy CSIRO Astronomy and Space Science 25 October 2011. Compact Array Broadband Backend. Status

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Graeme Carrad Theme Leader – Technologies for Radio Astronomy CSIRO Astronomy and Space Science

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  1. Australia Telescope Users Committee Technologies Report – October 2011 Graeme Carrad Theme Leader – Technologies for Radio Astronomy CSIRO Astronomy and Space Science 25 October 2011

  2. Compact Array Broadband Backend Status • 64MHz zoom mode with all 16 zooms available has an estimated delivery date of year end 2011. • Wilson handover • Leave • Tim Bateman will transfer from ASKAP to CABB and will concentrate on problems that contribute to operational bugs and unreliability. • Warwick Wilson back in the country and working in with Bob Sault. • Lessons learned from implementing 1 MHz and 64 MHz allow faster delivery of the remaining two modes …or are CABB’s bugs to be fixed first? – feedback needed. CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  3. 20/13 and 6/3 cm Upgrade Project 4 – 12GHz Receiver Upgrade • Australian Astronomy Limited (AAL) funding commenced in July 2011. Scheduled for completion in June 2013. • Two 4 – 12GHz LNAs have been fabricated and incorporated into a proof of concept receiver. Amplifier noise temperature ~7.5K. Receiver noise temperature ~9K • The receiver is to be installed and tested on a Compact Array antenna in the last week of November. (week starting 28th) CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  4. 20/13 and 6/3 cm Upgrade Project (2) 4 – 12GHz Receiver Upgrade • Measurements of the existing feed and OMT indicate they do not cover the full band. • A new OMT has been fabricated and performs well CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  5. 20/13 and 6/3 cm Upgrade Project (3) CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  6. 20/13 and 6/3 cm Upgrade Project (4) CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  7. 20/13 and 6/3 cm Upgrade Project (5) • We will look at options for the feed but must ascertain if resources are available before proceeding to outfit the array • ICT engaged to conduct a study for a feed design that achieves the desired bandwidth but constrained to the same feed throat dimension as the current C/X feed. • Any loss of science above 11 GHz please communicate to Project Scientist Naomi McClure Griffiths. CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  8. Other activities • Talks with FAST project and JBCA regarding a design study for a multibeam now at contract preparation stage. CSIRO Astronomy and Space Science - Technologies for Radio Astronomy

  9. Thank you CSIRO Astronomy and Space Science Graeme Carrad Theme Leader – Technologies for Radio Astronomy Phone: 61 2 9372 4305 Email: Graeme.Carrad@csiro.au Web: www.atnf.csiro.au Contact Us Phone: 61 2 9372 4100 Fax: 61 2 9372 4310 Email: atnf-enquiries@csiro.au Web: www.atnf.csiro.au

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