Services available

At the Osservatorio di Arcetri Radio Astronomy laboratories we have facilities to:
  • build and test receivers up to 40 - 350 GHz
  • develop digital hardware with TTL, CMOS and ECL technologies
  • develop software for instrument control and data reduction
  • limited capabilities on cryogenic receivers

    Works in progress

    Cryogenic 7-beam receiver for 19-26 GHz

    A cooled receiver with limited mapping capabilities. It will be used to perform mapping in the molecular lines of water vapor (blind searches, surveys in molecular complexes) ans ammonia (mapping of star forming regions).

    From top to bottom you can see the corrugated feed-horns, the noise injection couplers (scheme below), the polarizer and orhtomode transducers (gold plated), and the 14 InSb receivers (blue boxes). All these components are cooled to 15K to reduce thermal noise.

    Measured total equivalent noise (including Dewar window) is 25 K. The receiver will be installed at the Medicina radiotelescope in January 2008, and will be one of the first receivers available on SRT.

    16 channel spectropolarimeter

    This is a spectropolarimeter based on the ALMA Tunable filterboard, to be used together with the 7 beam dual poalrization receiver described above.

    As the ALMA TFB board is based on programmable logic, it can be reconfigured for completely different purposes. Here we have implemented on a single board 8 independent digital baseband converers (dBBC), and 4 dual channel FFT spectrometers, with a resolution of 4096 points.

    The instrument is composed of 2 TFB boards, and 2 ADC boards, developed locally, with 8 250 MS/s ADCs.

    Final tests are in progress. First astronomical tests on a single channel have been performed on W3OH water maser in May 2007.


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