Temperature dependence of charge transfer inefficiency in Chandra X-ray CCDs
arXiv:astro-ph/0606178 · doi:10.1117/12.672019
Abstract
Soon after launch, the Advanced CCD Imaging Spectrometer (ACIS), one of the focal plane instruments on the Chandra X-ray Observatory, suffered radiation damage from exposure to soft protons during passages through the Earth's radiation belts. The primary effect of the damage was to increase the charge transfer inefficiency (CTI) of the eight front illuminated CCDs by more than two orders of magnitude. The ACIS instrument team is continuing to study the properties of the damage with an emphasis on developing techniques to mitigate CTI and spectral resolution degradation. We present the initial temperature dependence of ACIS CTI from -120 to -60 degrees Celsius and the current temperature dependence after more than six years of continuing slow radiation damage. We use the change of shape of the temperature dependence to speculate on the nature of the damaging particles.
arXiv comment9 pages, 8 figures, to appear in Proc. SPIE vol 6276 "High Energy, Optical, and Infrared Detectors for Astronomy II"
References in corpus (5)
- An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
- A charge transfer inefficiency correction model for the Chandra Advanced CCD Imaging Spectrometer
- Long-term trends in radiation damage of Chandra X-ray CCDs
- Sacrificial charge and the spectral resolution performance of the Chandra Advanced CCD Imaging Spectrometer
- The temporal characteristics of the Chandra X-ray Observatory high energy particle background
Cited by in corpus (5)
- Soft X-ray Imager aboard Hitomi (ASTRO-H)
- Skipper-CCD Sensors for the Oscura Experiment: Requirements and Preliminary Tests
- Proton Radiation Damage Experiment on P-Channel CCD for an X-ray CCD camera onboard the Astro-H satellite
- Experimental studies on the charge transfer inefficiency of CCD developed for the soft X-ray imaging telescope Xtend aboard the XRISM satellite
- Fifteen years of the Advanced CCD Imaging Spectrometer