Author(s)
| Alonso-Arias, P (IAC, La Laguna ; Laguna U., Tenerife ; CERN) ; Cuttaia, F (INAF-IRA, Bologna) ; Terenzi, L (INAF-IRA, Bologna) ; Simonetto, A (ISTP, Milan) ; Fuerte-Rodríguez, P A (IAC, La Laguna ; European Southern Observ.) ; Hoyland, R (IAC, La Laguna) ; Rubiño-Martín, J A (IAC, La Laguna ; Laguna U., Tenerife) |
Abstract
| The Tenerife Microwave Spectrometer (TMS) is a ground-basedradio-spectrometer that will take absolute measurements of the skybetween 10–20 GHz. To ensure the sensitivity and immunity tosystematic errors of these measurements, TMS includes an internalcalibration system optimised for the TMS band, and cooled down to4 K. It consists of an Aluminium core, composed of a baseplate anda bed of pyramidal elements coated with an absorber material and ametallic shield. The absorber coating is made of a commercial resinECCOSORB CR/MF 117. To achieve the high stability (± 1 mK/h),temperature homogeneity (thermal gradients ΔT ≤ 25 mK),and emissivity (e ≥ 0.999) requirements of the reference unit,careful consideration has been given to the RF and thermalproperties of the materials, as well as their geometry. In summary,this paper presents a comprehensive account of the design,characterisation, and test results of the TMS reference system. |