Integration of the Sub/millimeter Front-End for the LLAMA Radiotelescope

J. BARKHOF; SANDRO VERRI; FERNANDO HAUSCARRIAGA; JUAN J. LARRARTE; R. HESPER; A. BARYSHEV; M. BEKENMA; J. ADEMA; MARCOS LUQUEZE; ELISEO DÍAZ; EMILIANO RASZTOCKY; J. P. GARCÍA; GUILLERMO GANCIO

Malargüe

Encuentro; 60 Reunión Anual de la Asociación Argentina de Astronomía; 2017

Asociación Argentina de Astronomía - AAA

LLAMA is a joint project of Argentina and Brazil with the objective of install and operate a radiotelescope of 12m diameter in the Province of Salta at 4820AMSL, to explore the southern sky in millimeter and sub-millimeter waves.The first LLAMA Sub/millimeter receivers that are going to be part of the radiotelescope are, Band 5, side band separating receiver, two polarizations from 163GHz up to 211GHz and Band 9, Single ended DSB, two polarizations from 602GHz up to 720GHz, as a heritage from the ALMA observatory. These receivers were verified and integrated into the LLAMA Cryostat (procured from NAOJ institute of Japan). This Cryostat operates at the cryogenic temperatures of 4◦K, 15◦K and 110◦K, and the integration was completed at the NOVA Institute, The Netherlands.As part of this integration the two LLAMA Sub/millimeter receivers were tested and verified using the NOVA test setup, which is part of the ALMA Band 5 production, and with the LLAMA Cryostat, to compare the functionality between systems and to comply with the ALMA standard requirements.Part of the verification consists on measurements of the Receiver Noise Temperature, Side Band Ratio, Beam pattern, Receiver Stability, among others.The present work will show the integration process of the LLAMA Cryostat, the integration of the Sub/millimeter receivers, and the results from the verification measurement of the receivers in both systems.