Ms. Valeria Tapia Profile

Valeria Tapia

at Univ de Chile

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Author

Publications (7)

Proceedings Article | 2 September 2022 Presentation + Paper

ALMA Band-1 (35-50GHz) receiver: first light, performance, and road to completion

Yau-De Huang, Yuh-Jing Hwang, Chau-Ching Chiong, Hsi-Wei Yen, Patrick Michel Koch, Chi-Den Huang, Bill Liu, Cheng Lin Chen, Jwu Jiun Tsai, Wei-Ling Hsiung, Li-Pin Chi, Chin-Ting Ho, Chao-Chin Wang, Chen Chien, You-Hua Chu, Paul Ho, Francisca Kemper, Oscar Morata, Alvaro Gonzalez, Satoru Iguchi, Yoshi Uzawa, Daisuke Iono, Hiroshi Nagai, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes, Giorgio Siringo, Gianni Marconi, Rodrigo Cabezas

Proceedings Volume 12190, 121900K (2022) https://doi.org/10.1117/12.2629766

KEYWORDS: Receivers, Optical amplifiers, Radio astronomy, Antennas, Astronomy, Observatories, Cryogenics, Simulation of CCA and DLA aggregates, Roads, Galactic astronomy

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Proceedings Article | 9 July 2018 Paper

Performance of pre-production band 1 receiver for the Atacama Large Millimeter/submillimeter Array (ALMA)

Yau-De (Ted) Huang, Oscar Morata, Patrick Michel Koch, Ciska Kemper, Yuh-Jing Hwang, Chau-Ching Chiong, Paul T. Ho, You-Hua Chu, Chi-Den Huang, Ching-Tang Liu, Fang-Chia Hsieh, Yen-Hsiang Tseng, Chia-Hsiang Yang, Jinn jy Tsay, Tsu Chang, Chin-Ting Ho, Po-Han Chiang, Chih-Cheng Chang, Shou-Ting Jian, Sung-Po Hsu, Chen Chien, Satoru Iguchi, Shin'ichiro Asayama, Daisuke Iono, Alvaro Gonzalez, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes

Proceedings Volume 10708, 1070833 (2018) https://doi.org/10.1117/12.2310127

KEYWORDS: Receivers, Radio astronomy, Astronomy

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Proceedings Article | 9 July 2018 Presentation + Paper

The STRIP instrument of the Large Scale Polarization Explorer: microwave eyes to map the Galactic polarized foregrounds

Cristian Franceschet, Sabrina Realini, Aniello Mennella, Giuseppe Addamo, Alessandro Baù, Paola Battaglia, Marco Bersanelli, Barbara Caccianiga, Silvia Caprioli, Francesco Cavaliere, Kieran Cleary, Francesco Cuttaia, Francesco Del Torto, Viviana Fafone, Zunnoorain Farooqui, Ricardo Génova Santos, Todd Gaier, Massimo Gervasi, Tommaso Ghigna, Federico Incardona, Simone Iovenitti, Mike Jones, Pekka Kangaslahti, Roberto Mainini, Davide Maino, Michele Maris, Patricio Mena, Rocío Molina, Gianluca Morgante, Andrea Passerini, Maria del Rosario Perez-de-Taoro, Oscar Peverini, Federico Pezzotta, Claudio Pincella, Nicolás Reyes, Alessio Rocchi, José Rubiño-Martín, Maura Sandri, Stefano Sartor, Mary Soria, Valeria Tapia, Luca Terenzi, Maurizio Tomasi, Elisabetta Tommasi, Daniele Viganó, Fabrizio Villa, Giuseppe Virone, Angela Volpe, Bob Watkins, Andrea Zacchei, Mario Zannoni

Proceedings Volume 10708, 107081G (2018) https://doi.org/10.1117/12.2313558

KEYWORDS: Telescopes, Polarization, Polarimetry, Polarizers, Calibration, Receivers, Microwave radiation, Sensors, Mirrors

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Proceedings Article | 10 August 2016 Paper

The Atacama Large Millimeter/sub-millimeter Array band-1 receiver

Yau De (Ted) Huang, Oscar Morata, Patrick Michel Koch, Ciska Kemper, Yuh-Jing Hwang, Chau-Ching Chiong, Paul Ho, You-Hua Chu, Chi-Den Huang, Ching-Tang Liu, Fang-Chia Hsieh, Yen-Hsiang Tseng, Shou-Hsien Weng, Chin-Ting Ho, Po-Han Chiang, Hsiao-Ling Wu, Chih-Cheng Chang, Shou-Ting Jian, Chien-Feng Lee, Yi-Wei Lee, Satoru Iguchi, Shin'ichiro Asayama, Daisuke Iono, Alvaro Gonzalez, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes

Proceedings Volume 9911, 99111V (2016) https://doi.org/10.1117/12.2232193

KEYWORDS: Receivers, Optical amplifiers, Radio astronomy, Prototyping, Astronomy, Galactic astronomy, Optical isolators, Cryogenics, Observatories, Carbon monoxide

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Proceedings Article | 20 July 2016 Paper

An ultra-broadband optical system for ALMA Band 2+3

V. Tapia, R. Nesti, A. González, I. Barrueto, F. Mena, N. Reyes, F. Villa, F. Cuttaia, P. Yagoubov

Proceedings Volume 9914, 99142X (2016) https://doi.org/10.1117/12.2233143

KEYWORDS: Receivers, Radio optics, Optical amplifiers, Astronomy, Field effect transistors, Antennas, Receivers, Polarization, Prototyping, Near field, Attenuators

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Proceedings Article | 19 July 2016 Paper

Band-1 receiver front-end cartridges for Atacama Large Millimeter/submillimeter Array (ALMA): design and development toward production

Yuh-Jing Hwang, Chau-Ching Chiong, Yau-De Huang, Chi-Den Huang, Ching-Tang Liu, Yue-Fang Kuo, Shou-Hsien Weng, Chin-Ting Ho, Po-Han Chiang, Hsiao-Ling Wu, Chih-Cheng Chang, Shou-Ting Jian, Chien-Feng Lee, Yi-Wei Lee, Marian Pospieszalski, Doug Henke, Ricardo Finger, Valeria Tapia, Alvaro Gonzalez

Proceedings Volume 9914, 99141X (2016) https://doi.org/10.1117/12.2231547

KEYWORDS: Receivers, Prototyping, Amplifiers, Antennas, Waveguides, Optical amplifiers, Optical isolators, Optical filters, Polarization, Optical design

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The ALMA Band-1 receiver front-end prototype cold and warm cartridge assemblies, including the system and key components for ALMA Band-1 receivers have been developed and two sets of prototype cartridge were fully tested. The measured aperture efficiency for the cold receiver is above the 80% specification except for a few frequency points. Based on the cryogenically cooled broadband low-noise amplifiers provided by NRAO, the receiver noise temperature can be as low as 15 – 32K for pol-0 and 17 – 30K for pol-1. Other key testing items are also measured. The receiver beam pattern is measured, the results is well fit to the simulation and design. The pointing error extracted from the measured beam pattern indicates the error is 0.1 degree along azimuth and 0.15 degree along elevation, which is well fit to the specification (smaller than 0.4 degree). The equivalent hot load temperature for 5% gain compression is 492 - 4583K, which well fit to the specification of 5% with 373K input thermal load. The image band suppression is higher than 30 dB typically and the worst case is higher than 20 dB for 34GHz RF signal and 38GHz LO signal, which is all higher than 7 dB required specification. The cross talk between orthogonal polarization is smaller than -85 dB based on present prototype LO. The amplitude stability is below 2.0 x 10-7 , which is fit to the specification of 4.0 x 10-7 for timescales in the range of 0.05 s ≤ T ≤ 100 s. The signal path phase stability measured is smaller than 5 fs, which is smaller than 22 fs for Long term (delay drift) 20 s ≤ T < 300 sec. The IF output phase variation is smaller than 3.5° rms typically, and the specification is less than 4.5° rms. The measured IF output power level is -28 to -30.5 dBm with 300K input load. The measured IF output power flatness is less than 5.6 dB for 2GHz window, and 1.3dB for 31MHz window. The first batch of prototype cartridges will be installed on site for further commissioning on July of 2017.

Proceedings Article | 22 July 2014 Paper

Design of the optical system for ALMA band 1

Nicolás Reyes, Valeria Tapia, Doug Henke, Miguel Sanchez-Carrasco, F. Patricio Mena, Stéphane M. Claude, Leonardo Bronfman

Proceedings Volume 9145, 91451W (2014) https://doi.org/10.1117/12.2055170

KEYWORDS: Optical filtering, Optical design, Antennas, Receivers, Mirrors, Optical filters, Radio optics, Dielectrics, Near field, Chemical elements

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Showing 5 of 7 publications

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