&lt;title&gt;The IRAM 230-GHz multibeam SIS receiver&lt;/title&gt;

Schüster, K.; Blondell, Jaques; Bortolotti, Yves; Carter, Matthew; Fouilleux, Bernard; Lazareff, B.; Mattiocco, F.; Morel, Francis; Perrigouard, Alain; Pollet, Jean-Louis

doi:10.1117/12.390419

Cited by 3 publications

(3 citation statements)

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“…1 However, the high angles of incidence of the input and output K-mirror reflections generate strong aberrations even for weakly powered surfaces. 22 Therefore, examples of powered K-mirrors in the literature confine optical power to the second mirror (M2 in Fig. 2), which has the smallest angle of incidence.…”

Section: Optical Design Of Dynamic K-mirror Systemsmentioning

confidence: 99%

Utilizing freeform optics in dynamic optical configuration designs

Trumper

Marrone

Kim

2019

J. Astron. Telesc. Instrum. Syst.

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A linear field of view (FOV) K-mirror system used for image derotation is presented as a case example for how to leverage freeform surfaces in dynamic optical configuration design. As the K-mirror rotates about the optical axis, points in the FOV sample the surface at distinct locations, allowing for highly local control of the system aberrations. This methodology is distinct from the typical benefits associated with freeform surfaces, and as such broadens the uses of freeform optics into the category of systems that exhibit changing optical configurations. We show that compared to an on-axis or off-axis conic design, the freeform surface has better distortion correction abilities. Furthermore, a real pupil is generated by the K-mirror system and analyzed for uniformity. The design ideas presented for the K-mirror are discussed in the context of astronomical applications, where systems may benefit from these techniques.

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Section: Optical Design Of Dynamic K-mirror Systemsmentioning

confidence: 99%

Utilizing freeform optics in dynamic optical configuration designs

Trumper

Marrone

Kim

2019

J. Astron. Telesc. Instrum. Syst.

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“…3) gave a beam pattern close to the design goal (cf. Schuster et al 2000b). The derived beam centroids lay on a regular 24 grid with a maximum deviation of 0.7 , i.e., within the normal pointing scatter for observing in good weather.…”

Section: Characteristics At the Telescopementioning

confidence: 99%

A 230 GHz heterodyne receiver array for the IRAM 30 m telescope

Schüster¹,

Boucher²,

Brunswig³

et al. 2004

A&A

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Abstract. We describe the technical concept, properties, and performance of HERA (HEterodyne Receiver Array) at the IRAM 30 m telescope. HERA is a multibeam, waveguide SIS receiver that greatly improves mapping speed in various observing modes and also provides possibilities for new high-sensitivity observing of small sources. Future extensions with a second polarization module will permit spectro-polarimetry. We present some examples of astronomical maps with HERA.

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“…Therefore, any multibeam system must incorporate more pixels without sacrificing the most advanced noise performance of contemporary single-beam systems. Other difficulties include efficiently coupling each pixel, managing the increased structure complexity, dividing and injecting the local oscillator (LO) signal without interfering with the astronomical signal flow, and processing the additional intermediate frequency (IF) signals [4][5] [6].…”

Section: Introductionmentioning

confidence: 99%

Preliminary design of a superconducting heterodyne array receiver for Leighton Chajnantor Telescope

Wang

Liu

Yao

et al. 2022

Infrared, Millimeter-Wave, and Terahertz Technologies IX

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The Leighton Chajnantor Telescope (LCT) project, sponsored by Shanghai Normal University in collaboration with Caltech and the University of Concepción, is seeking to relocate the Caltech Submillimeter Observatory (CSO)[1] from Mauna Kea, Hawaii to Llano de Chajnantor Observatory on the Chajnantor Plateau in Chile. The LCT will be equipped with a new 345-GHz band heterodyne array receiver of 3×3 beams and quantum-limited sensitivity. Based on superconducting Nb/Al-AlOx/Nb tunnel junction (SIS) mixers, we have developed a compact 1×3 array as one unit of the new heterodyne array receiver. Detailed design and measurement results will be presented.

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<title>The IRAM 230-GHz multibeam SIS receiver</title>

Cited by 3 publications

References 0 publications

Utilizing freeform optics in dynamic optical configuration designs

Utilizing freeform optics in dynamic optical configuration designs

A 230 GHz heterodyne receiver array for the IRAM 30 m telescope

Preliminary design of a superconducting heterodyne array receiver for Leighton Chajnantor Telescope

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