期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2022/04/040
关键词
CMBR detectors; CMBR experiments; CMBR polarisation; gravitational waves and CMBR polarization
资金
- France: ANR (Agencie Nationale de la Recherche)
- France: DIM-ACAV (Domaine d'Interet Majeur-Astronomie et Conditions d'Apparition de la Vie)
- France: Labex UnivEarthS (Universite de Paris)
- France: CNRS/IN2P3 (Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules)
- France: CNRS/INSU (Centre National de la Recherche Scientifique/Institut National des Sciences de l'Univers)
- Italy: CNR/PNRA Consiglio Nazionale delle Ricerche/Programma Nazionale Ricerche in Antartide)
- Italy: INFN (Istituto Nazionale di Fisica Nucleare)
- Argentina: MINCyT (Ministerio de Ciencia, Tecnologia e Innovacion)
- Argentina: CNEA (Comision Nacional de Energia Atomica)
- Argentina: CONICET (Consejo Nacional de Investigaciones Cientificas y Tecnicas)
- Irish Research Council under the Government of Ireland Postgraduate Scholarship Scheme
- National University of Ireland, Maynooth
- Science Foundation Ireland
This paper presents the design, manufacturing, and performance of the horn-switch system for the QUBIC technological demonstrator. The system, consisting of 64 dual-band corrugated feed-horns and mechanical switches, is used for selecting desired baselines during the instrument self-calibration. The electromagnetic performance of the feedhorns agrees with simulations, and the switches exhibit good return and insertion losses consistency and high isolation at 150 GHz.
We present the design, manufacturing and performance of the horn-switch system developed for the technological demonstrator of QUBIC (the Q&U Bolometric Interferometer for Cosmology). This system consists of 64 back-to-back dual-band (150 GHz and 220 GHz) corrugated feed-horns interposed with mechanical switches used to select desired baselines during the instrument self-calibration. We manufactured the horns in aluminum platelets milled by photo-chemical etching and mechanically tightened with screws. The switches are based on steel blades that open and close the waveguide between the back-to-back horns and are operated by miniaturized electromagnets. The measured electromagnetic performance of the feedhorns agrees with simulations. In particular we obtained a return loss around - 20 dB up to 230 GHz and beam patterns in agreement with single-mode simulations down to - 30 dB. The switches for this prototype were designed and built for the 150 GHz band. In this frequency range we find return and insertion losses consistent with expectations (< -25dB and similar to -0.1dB, respectively) and an isolation larger than 70dB. In this paper we also show the current development status of the feedhorn-switch system for the QUBIC full instrument, based on an array of 400 horn-switch assemblies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据