Abstract
The 6-meter Atacama Cosmology Telescope will map the cosmic microwave background at millimeter wave-lengths. The commissioning instrument for the telescope, the Millimeter Bolometer Array Camera, is based on a refractive optical system which simultaneously images three separate fields of view at three different frequencies: 145, 220, and 280 GHz. Each frequency band contains around twelve individual optical elements at five different temperature stages ranging from 300 K to 300 mK and a 32 × 32 array of Transition Edge Sensor bolometers at 300 mK. We discuss the design of the close-packed on-axis optical design of the three frequencies. The thermal design and performance of the system are presented in the context of the scientific requirements and observing schedule. A major part of the design was the incorporation of multiple layers of magnetic shielding. We discuss the performance of the 145 GHz optical system in 2007 and the implementation of the additional two frequency channels in 2008.
| Original language | English (US) |
|---|---|
| Title of host publication | Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV |
| DOIs | |
| State | Published - 2008 |
| Event | Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV - Marseille, France Duration: Jun 26 2008 → Jun 28 2008 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 7020 |
| ISSN (Print) | 0277-786X |
Other
| Other | Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV |
|---|---|
| Country/Territory | France |
| City | Marseille |
| Period | 6/26/08 → 6/28/08 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Keywords
- CMB telescope
- Cryogenic
- Mechanical design
- Millimeter camera
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