Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory
As ACIS on the Chandra X-ray Observatory enters its seventeenth year of operation, it continues to perform well and produce spectacular scientific results. The response of ACIS has evolved over the lifetime of the observatory due to radiation damage and aging of the spacecraft. The ACIS instrument t...
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| Format: | Article |
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SPIE, the International Society of Optical Engineering
2018
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| Online Access: | http://hdl.handle.net/1721.1/116590 https://orcid.org/0000-0002-4737-1373 https://orcid.org/0000-0002-1379-4482 |
| _version_ | 1826189009861214208 |
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| author | Durham, R. Nick Plucinsky, Paul P. Grant, Catherine E Bautz, Marshall W. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Durham, R. Nick Plucinsky, Paul P. Grant, Catherine E Bautz, Marshall W. |
| author_sort | Durham, R. Nick |
| collection | MIT |
| description | As ACIS on the Chandra X-ray Observatory enters its seventeenth year of operation, it continues to perform well and produce spectacular scientific results. The response of ACIS has evolved over the lifetime of the observatory due to radiation damage and aging of the spacecraft. The ACIS instrument team developed a software tool which applies a correction to each X-ray event and mitigates charge transfer inefficiency (CTI) and spectral resolution degradation. The behavior of the charge traps that cause CTI are temperature dependent, however, and warmer temperatures reduce the effectiveness of the correction algorithm. As the radiator surfaces on Chandra age, ACIS cooling has become less efficient and temperatures can increase by a few degrees. A temperature-dependent component was added to the CTI correction algorithm in 2010. We present an evaluation of the effectiveness of this algorithm as the radiation damage and thermal environment continue to evolve and suggest updates to improve the calibration fidelity. |
| first_indexed | 2024-09-23T08:08:25Z |
| format | Article |
| id | mit-1721.1/116590 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:08:25Z |
| publishDate | 2018 |
| publisher | SPIE, the International Society of Optical Engineering |
| record_format | dspace |
| spelling | mit-1721.1/1165902022-09-30T07:50:46Z Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory Durham, R. Nick Plucinsky, Paul P. Grant, Catherine E Bautz, Marshall W. MIT Kavli Institute for Astrophysics and Space Research Grant, Catherine E Bautz, Marshall W As ACIS on the Chandra X-ray Observatory enters its seventeenth year of operation, it continues to perform well and produce spectacular scientific results. The response of ACIS has evolved over the lifetime of the observatory due to radiation damage and aging of the spacecraft. The ACIS instrument team developed a software tool which applies a correction to each X-ray event and mitigates charge transfer inefficiency (CTI) and spectral resolution degradation. The behavior of the charge traps that cause CTI are temperature dependent, however, and warmer temperatures reduce the effectiveness of the correction algorithm. As the radiator surfaces on Chandra age, ACIS cooling has become less efficient and temperatures can increase by a few degrees. A temperature-dependent component was added to the CTI correction algorithm in 2010. We present an evaluation of the effectiveness of this algorithm as the radiation damage and thermal environment continue to evolve and suggest updates to improve the calibration fidelity. 2018-06-26T12:34:43Z 2018-06-26T12:34:43Z 2016-07 2018-03-16T14:33:25Z Article http://purl.org/eprint/type/ConferencePaper 0277-786X http://hdl.handle.net/1721.1/116590 Grant, Catherine E., Marshall W. Bautz, R. Nick Durham, and Paul P. Plucinsky. “ Evolution of Temperature-Dependent Charge Transfer Inefficiency Correction for ACIS on the Chandra X-Ray Observatory.” Edited by Jan-Willem A. den Herder, Tadayuki Takahashi, and Marshall Bautz. Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (July 18, 2016). https://orcid.org/0000-0002-4737-1373 https://orcid.org/0000-0002-1379-4482 http://dx.doi.org/10.1117/12.2233424 Proceedings of SPIE--the Society of Photo-Optical Instrumentation Engineers Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf SPIE, the International Society of Optical Engineering SPIE |
| spellingShingle | Durham, R. Nick Plucinsky, Paul P. Grant, Catherine E Bautz, Marshall W. Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title | Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title_full | Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title_fullStr | Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title_full_unstemmed | Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title_short | Evolution of temperature-dependent charge transfer inefficiency correction for ACIS on the Chandra X-ray Observatory |
| title_sort | evolution of temperature dependent charge transfer inefficiency correction for acis on the chandra x ray observatory |
| url | http://hdl.handle.net/1721.1/116590 https://orcid.org/0000-0002-4737-1373 https://orcid.org/0000-0002-1379-4482 |
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