dc.contributor.author | Lesurf, James Christopher George | |
dc.date.accessioned | 2017-08-31T12:23:15Z | |
dc.date.available | 2017-08-31T12:23:15Z | |
dc.date.issued | 1981-02 | |
dc.date.submitted | 2017-08-25T13:32:38.000Z | |
dc.identifier.citation | Lesurf, J.C.G. 1981. A Quasi-Optical Astronomical Receiver. Queen Mary University of London | en_US |
dc.identifier.uri | http://qmro.qmul.ac.uk/xmlui/handle/123456789/25544 | |
dc.description | PhD | en_US |
dc.description.abstract | This thesis describes the work undertaken in producing the
passive radio-frequency section of a heterodyne receiver for
use on the United Kingdom Infra-Red Telescope at signal frequencies
in the 200-300 GHz range. This is a Quasi-Optical system,
comprised of a Martin-Puplet polarising interferometer employed
as a diplexer and the lenses and feed horns by which the
diplexer was coupled to the telescope, local oscillator, and
mixer.
The Gaussian beam-mode approach was employed to develop a
theoretical basis for understanding the operation of such a
system upon coherent paraxial beams. Quasi-Optical systems were
then designed and their performance predicted by the application
of this extension of Gaussian optics.
Two such systems were constructed and their performance
determined by laboratory measurements to be as predicted. One
of these systems was then installed on the telescope where it
was shown to function as designed.
As part of the calibration and test routine on the telescope
a number of astronomical measurements were made, including
a determination of the apparent temperatures of the planets
Jupiter and Saturn by a method different to that employed
for results previously published.
The Quasi-Optical receiver was successfully calibrated and
commissioned as a common-user instrument. As such it will
continue to be used in a variety of astronomical research
programs undertaken by various groups. | en_US |
dc.description.sponsorship | Science Research Council | |
dc.language.iso | en | en_US |
dc.publisher | Queen Mary University of London | |
dc.subject | Paediatric Dentistry | en_US |
dc.subject | Dental Physical Sciences | en_US |
dc.subject | Salivary proteins | en_US |
dc.title | A Quasi-Optical Astronomical Receiver. | en_US |
dc.type | Thesis | en_US |
dc.rights.holder | The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author | |