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Instrumentation

The main goals of this Consolider are to begin with the operation of the Thirty Giga-Hertz Instrument (TGI), to develop a new instrument at 41 GHz (FGI – Forty Giga-Herzt Instrument), to build a second 3 m telescope and also to develop a correlator for a large-format interferometer prototype at 30 GHz.

The instruments TGI and FGI, safely below the 60 GHz atmospheric absorption band, will significantly increment the sensitivity of QUIJOTE to detect the r parameter. The reason for this is not only the significant reduction of noise due to the number of polarimeters that will incorporate but also the lower synchrotron signal from our Galaxy expected at these higher frequencies. Both TGI and FGI consist of 31 polarimeters to be operated in the two telescopes of the QUIJOTE experiment.

The QUIJOTE experiment operates at Izaña observatory so far with the first telescope, which is already built since 2009, and the Multi-Frequency Instrument (MFI) mounted on it. The second telescope has been installed during the end of 2014 (Fig. 1).

 

Figure 1: Dome of the QUIJOTE experiment in the Izaña Observatory (Tenerife):The first telescope with the MFI (left) while the second telescope is installed (right).

 

TGI will start the operation during the first part of the present year, while FGI is expected to be fully operative at the end of this project. This means that during the last part of this project, the TGI and FGI would have been operative in parallel, to reach its scientific goals.

A technical description of the EPI project instrumentation (QUIJOTE experiment) is given here. FGI and TGI instruments (cryogenic and ambient temperatures amplifiers, opto-mechanic assemblies and the back-end modules) will be provided by the DICOM group (University of Cantabria) with the collaboration of IFCA (CSIC-UC), while the telescopes, cryostats, acquisition systems and all that is related with the observatory is responsibility of IAC (Instituto de Astrofísica de Canarias).