Cryostat design and fabrication for the Gemini MRI instrument

被引：4

作者：

Young, TT ^{[1
]}

Hodapp, KW ^{[1
]}

Douglass, J ^{[1
]}

Neill, D ^{[1
]}

Irvin, E ^{[1
]}

Robertson, L ^{[1
]}

机构：

[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

来源：

INFRARED ASTRONOMICAL INSTRUMENTATION, PTS 1-2 | 1998年 / 3354卷

关键词：

infrared; instrument; cryogenic; cooler; vacuum; cryostat; radiation; shield; aluminum; titanium;

D O I：

10.1117/12.317233

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Gemini Near Infrared Imager (NIRI) is a cryogenic instrument cooled by two closed-cycle cryo-coolers. The vacuum jacket is a hexagon shaped vacuum vessel made of three sections. Each section is forged out of aluminum 6061. All the internal structural components are made of aluminum 6061T6 except the supporting trusses, which are made of titanium. All the internal structural members are stress relieved to maintain dimensional stability and good optical alignment. The thermal insulation includes floating shields and cold shields. Two closed-cycle coolers are mounted opposite to each other and electronically synchronized in order to cancel the vibration caused by the oscillating expansion valve. Several different fabrication methods and stress relief methods are discussed.

引用

页码：1084 / 1091

页数：8