CFRP truss for the CCAT 25m diameter submillimeter-wave telescope

Woody, D. P.; Padin, S.; Sebring, Thomas A.

doi:10.1117/12.856498

Cited by 7 publications

(4 citation statements)

References 6 publications

(2 reference statements)

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“…Te three institutions jointly study the construction of a 25 m aperture submillimeter telescope on a 5000 m peak in northern Chile [62]. Te antenna's back frame and main refector will be constructed of carbon fber reinforced plastic [63] as to meet the surface RMS error requirement of 10 microns [64]. However, due to the problem of funding, although the designing concept was proposed in 2006, the construction of the antenna has not yet started.…”

Section: Cerro Chajnantor Atacama Telescope Te Cerromentioning

confidence: 99%

Progress and Challenges in Electromechanical Coupling of Radio Telescopes

Yan

Xue

et al. 2022

International Journal of Antennas and Propagation

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Radio astronomy is a discipline of dynamics and wonders. The vast universe has many secrets to unravel. As one of the important facilities in this discipline, radio telescopes play a key role in collecting astronomical data and unraveling mysteries. With the demand of radio astronomy for a higher frequency, wider bandwidth, higher gain, and higher pointing accuracy, the aperture of the radio telescope is gradually increasing, and its electrical performance and structure have become tightly coupled. Therefore, how to ensure the stable and efficient operation of the telescope for the long-term operation has become the urgent demand for large aperture high-performance radio telescopes. Therefore, this paper firstly makes a comparison of the overall condition of large radio telescopes in nearly a decade that are both constructed and operated, including the progress of radio telescopes that are being constructed and the planning for construction. Then, systematically summarized the latest research progress of electromechanical coupling technology from 3 aspects of connotation and application of electromechanical coupling, and performance guarantee under slowly varying load and performance guarantee under rapidly varying load from the perspectives of design, manufacturing, and observation operating. Lastly, the future research direction of electromechanical coupling technology is pointed out according to the development trend of radio astronomy.

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Section: Cerro Chajnantor Atacama Telescope Te Cerromentioning

confidence: 99%

Progress and Challenges in Electromechanical Coupling of Radio Telescopes

Yan

Xue

et al. 2022

International Journal of Antennas and Propagation

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“…The panels, truss strut connections, secondary, and instrument are represented by point masses located at truss nodes. All of the structure is made of A36 steel, except for the secondary support, which is a braced CFRP hexapod similar in configuration to the secondary support in the Giant Magellan Telescope [35,36]. Materials properties for the model are given in Table 3.…”

Section: Performancementioning

confidence: 99%

Inexpensive mount for a large millimeter-wavelength telescope

Padin¹

2014

Appl. Opt.

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A telescope mount with a single-point force support at the center of gravity of the primary mirror is proposed in order to eliminate much of the structure and cost of a large, millimeter-wavelength telescope. The single-point support gives repeatable thermal and gravitational deformation, so the surface of the primary can be controlled based on lookup tables for elevation and temperature. The new design is most appropriate for a survey telescope because locating the support above the vertex of the primary limits the range of motion of the mount to about 1 rad. A 30 m diameter, λ 850 μm telescope with the proposed mount is a factor of 4 lighter than a design with a conventional elevation-over-azimuth mount, and roughly half the cost.

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“…One of the major challenges for CFRP telescope truss is the interface to the steel tipping structure which must allow for the differential thermal expansion of the two materials without distorting the primary surface or compromising the stiffness of the total structure. This is accomplished using the concept of thermal homology 10 which defines how multiple connections can be made between the CFRP and steel structures throughout a 3D volume without inducing thermal deformation stresses. The truss shown in Figure 4 has two concentric rings of blade flexures that connect the bottom set of nodes to the steel tipping structure plus a single rigid pillar at the center of the bottom layer.…”

Section: Support Trussmentioning

confidence: 99%

The CCAT 25m diameter submillimeter-wave telescope

Woody¹,

Padin

Chauvin³

et al. 2012

SPIE Proceedings

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CCAT will be a 25 m diameter telescope operating in the 2 to 0.2 mm wavelength range. It will be located at an altitude of 5600 m on Cerro Chajnantor in Northern Chile. The telescope will be equipped with wide-field, multi-color cameras for surveys and multi-object spectrometers for spectroscopic follow up. Several innovations have been developed to meet the <0.5 arcsec pointing error and 10 μm surface error requirements while keeping within the modest budget appropriate for radio telescopes.

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CFRP truss for the CCAT 25m diameter submillimeter-wave telescope

Cited by 7 publications

References 6 publications

Progress and Challenges in Electromechanical Coupling of Radio Telescopes

Progress and Challenges in Electromechanical Coupling of Radio Telescopes

Inexpensive mount for a large millimeter-wavelength telescope

The CCAT 25m diameter submillimeter-wave telescope

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