Review meeting of design of the Spectrographs Clean Room was held / 分光器設置室の設計レビュー会議をしました

A review meeting for the Clean Room holding the spectrographs was held on 19 and 20 August at Hawaii Observatory, National Astronomical Observatory of Japan. The participants were from Kavli IPMU, collaborators having the responsibility for the Spectrograph, and Hawaii Observatory.

The spectrographs are put on the fourth floor in the dome building of  Subaru telescope. The floor will have a huge clean room with the weight of 15 ton (33000 lb) for four spectrographs. The clean room is designed to have a crane for building up and maintaining the observational
instruments, and an air control system for keeping the stability of the instruments.

There are various topics for design of the floor, not only the details of the clean room. For example, we need to arrange a bunch of cables and pipes in order to control mechanics, to cool down the cryogenic camera unit, and to operate the detectors. We also need to use safely and maintain easily the electric power as high as 30kVA at maximum, which corresponds to 15 standard homes. Because most of these equipment are newly prepared as well as the PFS spectrographs themselves, we should determine in details how to safely and steadily transfer all parts up to the fourth floor, and to build up the room and instruments. We engaged in a vigorous debate about various topics like these for two days.

IR4_design (design of the floors)


分光器を設置するフロアはすばる望遠鏡のドーム4階になります。フロアには4台の分光器を格納するクリーンルームが設置され、中には観測装置の組み上げやメンテに必要なクレーンや装置の安定性を確保するために不可欠な温調設備が備えられ、装置も含めた全体の重量は 15t にもなります。

フロアの設計には、クリーンルームの詳細はもちろん、他にも多くの検討事項があります。例えば、分光器の機械系制御やカメラの冷却、検出器制御のために非常に多くのケーブル・配管を設置する必要があります。また最大電力使用量が30kVA (一般家庭の契約最大電力15軒分)程度になるため、その安全性やメンテのしやすさについても検討が必要です。PFS 分光器を始め、こうした設備の多くは新規に用意しますから、すべてのパーツをこの4階まで引き上げ順次作業を進めるための手順と安全の確保は重要な課題です。こうした様々な検討・議論が、2日間にわたりみっちりと行われました。

IR4_design (分光器設置フロアの設計図)


Leave a Reply

Your email address will not be published. Required fields are marked *