Curved focal plane extreme ultraviolet detector array for a EUV camera on CHANG E lander
Optics Express
|December 25, 2015
Summary
A novel curved focal plane detector array was developed for moon-based extreme ultraviolet (EUV) cameras. This detector achieves excellent spatial resolution and low noise, meeting mission requirements.
Area of Science:
- Space Science and Instrumentation
- Detector Physics
Background:
- Extreme ultraviolet (EUV) astronomy requires advanced imaging detectors.
- Existing detector arrays often have limitations in curved applications.
Purpose of the Study:
- To demonstrate a novel curved focal plane detector array for a moon-based EUV camera.
- To characterize the performance of this new detector technology.
Main Methods:
- Fabrication of curved microchannel plates (MCPs) using thermal slumping, optical polishing, and etching.
- Integration of curved MCPs with a wedge-strip anode (WSA) for pulse-counting detection.
- Comprehensive performance characterization including noise, gain, linearity, and spatial resolution.
Main Results:
- Successfully fabricated curved MCPs with a length-to-diameter ratio of 80:1 and a 150 mm radius of curvature.
- Achieved a spatial resolution of 7.13 line pairs/mm.
- Measured background noise below 0.3 counts/cm²·s.
Conclusions:
- The developed curved focal plane detector array meets the stringent requirements for moon-based EUV imaging.
- This technology enables enhanced performance for future space-based EUV observatories.
Related Concept Videos
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
963
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
963
01:14UV–Vis Spectrometers
4.5K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
4.5K