Contributions of the MIT ACIS Team to the AXAF Calibration Review

Marshall Space Flight Center, 13-15 November 1996

Introduction and Model Summary

AICS CCD Detector Calibration Overview

ACIS X-ray Information Flow

Front-Illuminated X-ray CCD Structure

Optical Depth Maps of CCID 7 Pixel Gate Structure

Calculated Potential Profiles Inside a Single Pixel

Calibration Plan Summary

ACIS Ground Calibration Flow

ACIS CCD Devices That Meet Screening Criteira

Spectral Resolution Measurements

Measurements at "Off-nominal" Conditions"

Calibration Results: Spectral Resolution and Relative Efficiency

Sample Gain/FWHM for a Front-Illuminated CCD

Sample Gain/FWHM for a Back-Illuminated CCD

Silicon Escape Peak Features

Modelled Off-Peak Features

Summary of Resolution Measurements of Selected CCDs

Relative QE of CCD W103c4

Summary of Quantum Efficiency Measurements

Calibration Results: Absolute Detection Efficiency (PTB/BESSY)

ACIS Calibratioin Objectives at PTB/BESSY

Count Rate Linearity/Reproducibility

Measured and Modelled Response of MIT CCD to PTB/BESSY White Light Beam

Edge Structure Measurements

Summary

Concerns and Limitations of ACIS Calibration

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