NRAO

天文望遠鏡 – 震盪式次反射鏡系統(Nutator)之研製

  • 毫米陣列天文望遠鏡計畫Atacama Large Millimeter Sub Millimeter Array (ALMA)是由NRAO美國國家天文研究所及北美、德、法日本台灣國家天文機構共同開發建造使用，該陣列望遠鏡位於智利北部五千公尺Chajnantor 高原之Atacama荒漠上。
  • 磁震公司兩年前擊敗其他各國競爭對手，贏得ALMA 計畫毫米陣列天文望遠鏡之陣列式次反射系統(Nutator)5套之研製合約。該案為挑戰尖端科技之研發案，以碳纖維材料取代鋁合金來設計製造次反射鏡硬體結構。
  • 技術層面:
  • 次反射鏡鏡面加工精度要求高達3μm(10¯6)
  • 無線電波反射率99%，系統操作位移速度達1.3 arc/sec(弧秒)。

AMiBa

  • The Array for Microwave Background Anisotropy (AMiBA)，又名”李遠哲陣列微波背景分析儀”。
  • 此專案 :
  • 由中央研究院天文及天文物理研究所領導、設計、製造、運作。
  • 主要合作對象為台灣大學物理系，電機工程學系及澳洲國家天文望遠鏡中心。
  • 卡內基梅隆大學(CMU),及美國國家無線電波天文觀測研究院 亦參與共同開發。
  • AMiBA是一種無線電波天文望遠鏡 設計來觀察太空中的背景微電波和在雲河群星中Sunyaev-Zel’dovich 效應。
  • AMiBA is currently configured as a 7-element interferometer, using 0.576 m Cassegrain dishes mounted on a 6 m carbon fibre hexapod mount. It is located on Mauna Loa in Hawaii, at 3,396 m above sea, and observes at 3 mm (86–102 GHz) to minimize foregrounds.The telescope has a retractable shelter, made from seven steel trusses and PVC fabric.

FESV

  • FESV is a custom designed truck packed with the equipment required to transport and service ALMA’s temperature-sensitive astronomical equipment without removing a telescope from the working array at 16,500 feet.
  • The FESV is based on the familiar Volvo FH 6×4 chassis: It is 36 feet long, 8 feet wide, and weighs 26 tons. The truck’s built-in scissor lift is designed to push its cargo cabin 20 feet straight up to align with the receiver cabin of a telescope, similar to catering trucks that align with airplane doors, allowing personnel inside to replenish provisions directly at the airport gate.
  • The truck enables personnel to service million-dollar, state-of-the art hardware at one of the harshest locations on Earth, the Chajnantor Plain in the Atacama Desert of northern Chile. Working at an elevation of 16,500 feet, the FESVs will be at altitudes higher than even small aircraft can fly. To function in this extreme location, the FESV has insulated walls and a 440 HP turbo diesel engine.
  • Two FESVs were commissioned by the National Radio Astronomy Observatory, with the help of one of their partners in ALMA, the Academia Sinica Institute of Astronomy and Astrophysics. They were built by CoTech in association with Ke Chong Industries in Taiwan. The FEHV was designed and is currently being fabricated (respectively) by Chilean firms Prolaser Ltda. and Walper y Cía. Ltda.