2Kx2K molecular beam epitaxy HgCdTe detectors for the James Webb Space Telescope NIRCam instrument
2Kx2K molecular beam epitaxy HgCdTe detectors for the James Webb Space Telescope NIRCam instrument
复制标题
用于詹姆斯·韦伯太空望远镜 NIRCam 仪器的 2Kx2K 分子束外延 HgCdTe 探测器
DOI：
10.1117/12.553063
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
S. McMuldroch
中科院分区：
文献类型：
--
作者：
J. Garnett;M. Farris;S. Wong;M. Zandian;D. Hall;S. Jacobson;G. Luppino;Susan Parker;D. Dorn;Steven Franka;E. Freymiller;S. McMuldroch
NIRCam仪器将搭载10个罗克韦尔科学公司的红外分子束外延HgCdTe 2048 x2048元素探测器阵列，每个阵列都是目前技术中最大的，总共有4000万像素。该仪器将有两种分子束外延碲镉汞，一种是短波红外探测器，λco = 2.5 μm，用于NIRCam的短波通道（0.6-2.3 μm）;另一种是中波红外探测器，λco = 5.3 μm，用于NIRCam的长波通道（2.4-5.0 μm）。在MWIR的工作温度低于42 K和SWIR的工作温度低于80 K时，平均探测器暗电流小于0.01电子/秒/像素，量子效率超过80%，读取噪声低于6电子rms，使这些探测器阵列成为当今世界上最灵敏的SWIR和MWIR设备。分子束外延的独特优势，以及FPA的噪声，暗电流，量子效率和其他性能指标的数据将进行讨论。此外，焦平面组件封装设计将被介绍和讨论。
The NIRCam instrument will fly ten of Rockwell Scientific’s infrared molecular beam epitaxy HgCdTe 2048x2048 element detector arrays, each the largest available with current technology, for a total of 40 Megapixels. The instrument will have two varieties of MBE HgCdTe, a SWIR detector with λco = 2.5 μm, for the shortwave channel of NIRCam (0.6-2.3 μm); and a MWIR detector with λco = 5.3 μm, for the longwave channel of NIRCam (2.4-5.0 μm). Demonstrated mean detector dark currents less than 0.01 electrons per second per pixel at operating temperatures below 42 K for the MWIR and below 80 K for the SWIR, combined with quantum efficiency in excess of 80 percent and read noise below 6 electrons rms, make these detector arrays by far the most sensitive SWIR and MWIR devices in the world today. The unique advantages of molecular beam epitaxy as well as FPA data on noise, dark current, quantum efficiency, and other performance metrics will be discussed. In addition, the focal plane assembly package designs will be presented and discussed.