From the development site of Prime Focus Instrument / 主焦点装置製作の開発現場から…


Let us start with a question this time: What do you think these parts are used for?
There are a number of holes…

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They are some of the parts for Prime Focus Instrument (PFI) named as the “Cobra bench” and the “rails”, on which the fiber positioning actuators Cobra are installed (). As a picture below, one actuator is fixed in a hole of the rail on the bench of 70 cm diameter.

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The bench and rails as well as the fiber positioners are developed mainly by California Institute of Technology and NASA Jet Propulsion Laboratory (see here). After the bench was precisely machined, it has been coated black to minimize stray light due to reflection. In the future, the bench and the assembled fiber positioner modules will be delivered to Taiwan, where they will be integrated to the PFI system, and tested.

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突然ですが、この部品は何に使われるでしょう?穴がたくさんあるようですが。。

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これは主焦点装置に使用される部品のひとつで、ファイバー配置用アクチュエータ『コブラ』を設置する為の土台とレールです()。レールのひとつ一つの穴にアクチュエータが付きます。

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この土台やレール、アクチュエータはカリフォルニア工科大学とNASAジェット推進研究所を中心に開発されています(例えばこちら)。部品の到着後、土台は迷光を防ぐために黒く塗られました。今後は土台とカリフォルニアで組み立てられたユニットから少しずつ台湾に送られ、組み上げと最終試験が行われる予定です。

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