A predictive model for space-based X-ray ccd degradation

Alex Antunes; David Nelson Burrows; Gordon P. Garmire; David H. Lumb; John Andrew Nousek

doi:10.1007/BF01588352

A predictive model for space-based X-ray ccd degradation

Alex Antunes, David Nelson Burrows, Gordon P. Garmire, David H. Lumb, John Andrew Nousek

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The first generation of X-ray telescopes to use Charge-Coupled Devices (CCDs) is being launched this decade. With a read noise of a few electrons, CCDs provide Fano-limited spectral resolution across the soft X-ray band (0.1 - 10 keV). However, degradation of resolution due to charge transfer losses becomes noticeable as Charge Transfer Inefficiency (CTI) increases to 10^-5. In this paper, we present a model which calculates the effects of radiation damage in low Earth orbit in order to predict CCD lifetimes over which good charge transfer is maintained. The model presented here considers damage mechanisms within the CCD, environmental conditions in which the CCD operates, and experiment shielding. We find that the predicted CTI approaches 10^-5 after a one to two year mission for the flight instruments considered here.

Original language	English (US)
Pages (from-to)	159-175
Number of pages	17
Journal	Experimental Astronomy
Volume	4
Issue number	2
DOIs	https://doi.org/10.1007/BF01588352
State	Published - Jun 1 1993

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1007/BF01588352

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title = "A predictive model for space-based X-ray ccd degradation",

abstract = "The first generation of X-ray telescopes to use Charge-Coupled Devices (CCDs) is being launched this decade. With a read noise of a few electrons, CCDs provide Fano-limited spectral resolution across the soft X-ray band (0.1 - 10 keV). However, degradation of resolution due to charge transfer losses becomes noticeable as Charge Transfer Inefficiency (CTI) increases to 10-5. In this paper, we present a model which calculates the effects of radiation damage in low Earth orbit in order to predict CCD lifetimes over which good charge transfer is maintained. The model presented here considers damage mechanisms within the CCD, environmental conditions in which the CCD operates, and experiment shielding. We find that the predicted CTI approaches 10-5 after a one to two year mission for the flight instruments considered here.",

author = "Alex Antunes and Burrows, {David Nelson} and Garmire, {Gordon P.} and Lumb, {David H.} and Nousek, {John Andrew}",

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T1 - A predictive model for space-based X-ray ccd degradation

AU - Antunes, Alex

AU - Burrows, David Nelson

AU - Garmire, Gordon P.

AU - Lumb, David H.

AU - Nousek, John Andrew

PY - 1993/6/1

Y1 - 1993/6/1

N2 - The first generation of X-ray telescopes to use Charge-Coupled Devices (CCDs) is being launched this decade. With a read noise of a few electrons, CCDs provide Fano-limited spectral resolution across the soft X-ray band (0.1 - 10 keV). However, degradation of resolution due to charge transfer losses becomes noticeable as Charge Transfer Inefficiency (CTI) increases to 10-5. In this paper, we present a model which calculates the effects of radiation damage in low Earth orbit in order to predict CCD lifetimes over which good charge transfer is maintained. The model presented here considers damage mechanisms within the CCD, environmental conditions in which the CCD operates, and experiment shielding. We find that the predicted CTI approaches 10-5 after a one to two year mission for the flight instruments considered here.

AB - The first generation of X-ray telescopes to use Charge-Coupled Devices (CCDs) is being launched this decade. With a read noise of a few electrons, CCDs provide Fano-limited spectral resolution across the soft X-ray band (0.1 - 10 keV). However, degradation of resolution due to charge transfer losses becomes noticeable as Charge Transfer Inefficiency (CTI) increases to 10-5. In this paper, we present a model which calculates the effects of radiation damage in low Earth orbit in order to predict CCD lifetimes over which good charge transfer is maintained. The model presented here considers damage mechanisms within the CCD, environmental conditions in which the CCD operates, and experiment shielding. We find that the predicted CTI approaches 10-5 after a one to two year mission for the flight instruments considered here.

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A predictive model for space-based X-ray ccd degradation

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