Recollections of two and a half years with `Chris' Christiansen

Details Recollections of two and a half years with `Chris' Christiansen Recollections of two and a half years with `Chris' Christiansen

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jahh...12....4d&link_type=abstract

Journal of Astronomical History and Heritage (ISSN 1440-2807), Vol. 12, No. 1, p. 4 - 10 (2009).

Physics

W.N. (Chris) Christiansen, Csiro Division Of Radiophysics, Potts Hill, Solar Grating Interferometer, H-Line Emission, Solar Bursts

Scientific paper

I spent the period February 1951 to August 1953 in W.N. (Chris) Christiansen's group in the C.S.I.R.O.'s Division of Radiophysics in Sydney and at the Potts Hill field station. This was a particularly fruitful period of Chris' scientific career. It included the first detection of the 21-cm hydrogen line in the Southern Hemisphere and strong confirmation of the detections made at Harvard and Leiden. This, incidentally, became my own research area at Jodrell Bank beginning two years later. For Chris this was but an Interruption to his group's major effort of building a solar grating Interferometer. During the period from early 1951 to late 1953 we were intensely busy building, commissioning and operating this new solar Instrument. I was involved in most phases of this work, admittedly in a junior capacity-ranging from digging the post holes for the supports of the 32 antennas of the east-west array through to identifying the main source of radio emission with the H-alpha plages associated with sunspots using the Mt Stromlo spectroheliograph that I operated at Potts Hill. This was an exciting time to be at Radiophysics; being a member of Chris' group was inspirational to myself and the other young team members as I shall describe in this short paper.

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