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1. Detectors for the James Webb Space Telescope Near‐Infrared Spectrograph. I. Readout Mode, Noise Model, and Calibration Considerations

Author

Rauscher, Bernard J., Fox, Ori, Ferruit, Pierre, Hill, Robert J., Waczynski, Augustyn, Wen, Yiting, Xia‐Serafino, Wei, Mott, Brent, Alexander, David, Brambora, Clifford K., Derro, Rebecca, Engler, Chuck, Garrison, Matthew B., Johnson, Thomas, Manthripragada, Sridhar S., Marsh, James M., Marshall, Cheryl, Martineau, Robert J., Shakoorzadeh, Kamdin B., Wilson, Donna, Roher, Wayne D., Smith, Miles, Cabelli, Craig, Garnett, James, Loose, Markus, Wong‐Anglin, Selmer, Zandian, Majid, Cheng, Edward, Ellis, Timothy, Howe, Bryan, Jurado, Miriam, Lee, Ginn, Nieznanski, John, Wallis, Peter, York, James, Regan, Michael W., Hall, Donald N. B., Hodapp, Klaus W., Böker, Torsten, De Marchi, Guido, Jakobsen, Peter, and Strada, Paolo

Published
2007
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2. JWST Near-Infrared Detectors: Latest Test Results

Author

Smith, Erin C, Rauscher, Bernard J, Alexander, David, Brambora, Clifford K, Chiao, Meng, Clemons, Brian L, Derro, Rebecca, Engler, Chuck, Fox, Ori, Garrison, Matthew B, Greenhouse, Matthew A, Henegar, Greg, Hill, Robert J, Johnson, Thomas, Lavaque, Dodolfo J, Lindler, Don J, Manthripragada, Sridhar S, Marshall, Cheryl, Mott, Brent, Parr, Thomas M, Roher, Wayne D, Shakoorzadeh, Kamdin B, Schnurr, Richard, Smith, Miles, and Waczynski, Augustyn

Subjects
Astronomy
Abstract

The James Webb Space Telescope, an infrared-optimized space telescope being developed by NASA for launch in 2013, will utilize cutting-edge detector technology in its investigation of fundamental questions in astrophysics. JWST's near infrared spectrograph, NIRSpec utilizes two 2048 x 2048 HdCdTe arrays with Sidecar ASIC readout electronics developed by Teledyne to provide spectral coverage from 0.6 microns to 5 microns. We present recent test and calibration results for the NIRSpec flight arrays as well as data processing routines for noise reduction and cosmic ray rejection.

Published
2009

3. James Webb Space Telescope Near-Infrared Spectrograph: Dark Performance of the First Flight Candidate Detector Arrays

Author

Rauscher, Bernard J, Alexander, David, Brambora, Clifford K, Chiao, Meng, Clemons, Brian L, Derro, Rebecca, Engler, Chuck, Fox, Ori, Garrison, Matthew B, Greenhouse, Matthew A, Henegar, Greg, Hill, Robert J, Johnson, Thomas, Lavaque, Rodolfo J, Lindler, Don J, Manthripragada, Sridhar S, Marshall, Cheryl, Mott, Brent, Parr, Thomas M, Roher, Wayne D, Shakoorzadeh, Kamdin B, Smith, Miles, Waczynski, Augustyn, and Wen, Yiting

Subjects
Instrumentation And Photography
Abstract

The James Webb Space Telescope (JWST) Near Infrared Spectrograph (NIRSpec) incorporates two 5 micron cutoff (lambda(sub co) = 5 micron) 2048x2048 pixel Teledyne HgCdTe HAWAII-2RG sensor chip assemblies. These detector arrays, and the two Teledyne SIDECAR application specific integrated circuits that control them, are operated in space at T approx. 37 K. This article focuses on the measured performance of the first flight-candidate, and near-flight candidate, detector arrays. These are the first flight-packaged detector arrays that meet NIRSpec's challenging 6 e(-) rms total noise requirement.

Published
2008

4. Detectors for the James Webb Space Telescope Near-Infrared Spectrograph I: Readout Mode, Noise Model, and Calibration Considerations

Author

Rauscher, Bernard J, Fox, Ori, Ferruit, Pierre, Hill, Robert J, Waczynski, Augustyn, Wen, Yiting, Xia-Serafino, Wei, Alexander, David, Brambora, Clifford K, Derro, Rebecca, Engler, Chuck, Garrison, Matthew B, Johnson, Thomas, Manthripragada, Sridhar S, Marsh, James M, Marshall, Cheryl, Martineau, Robert J, Shakoorzadeh, Kamdin B, Wilson, Donna, Roher, Wayne D, Cabelli, Craig, Garnett, James, Loose, Markus, Wong-Anglin, Selmer, and Zandian, Majid

Subjects
Acoustics
Abstract

We describe how the James Webb Space Telescope (JWST) Near-Infrared Spectrograph's (NIRSpec's) detectors will be read out, and present a model of how noise scales with the number of multiple non-destructive reads sampling-up-the-ramp. We believe that this noise model, which is validated using real and simulated test data, is applicable to most astronomical near-infrared instruments. We describe some non-ideal behaviors that have been observed in engineering grade NIRSpec detectors, and demonstrate that they are unlikely to affect NIRSpec sensitivity, operations, or calibration. These include a HAWAII-2RG reset anomaly and random telegraph noise (RTN). Using real test data, we show that the reset anomaly is: (1) very nearly noiseless and (2) can be easily calibrated out. Likewise, we show that RTN affects only a small and fixed population of pixels. It can therefore be tracked using standard pixel operability maps.

Published
2007

5. Detector Arrays for the James Webb Space Telescope Near-Infrared Spectrograph

Author

Rauscher, Bernard J, Alexander, David, Brambora, Clifford K, Derro, Rebecca, Engler, Chuck, Fox, Ori, Garrison, Matthew B, Henegar, Greg, Hill, robert J, Johnson, Thomas, Lindler, Don J, Manthripragada, Sridhar S, Marshall, Ceryl, Mott, Brent, Parr, Thomas M, Roher, Wayne D, Shakoorzadeh, Kamdin B, Smith, Miles, Waczynski, Augustyn, Wen, Yiting, Wilson, Donna, and Xia-Serafino, Wei

Subjects
Astronomy
Abstract

The James Webb Space Telescope's (JWST) Near Infrared Spectrograph (NIRSpec) incorporates two 5 micron cutoff (lambda(sub co) = 5 microns) 2048x2048 pixel Teledyne HgCdTe HAWAII-2RG sensor chip assemblies. These detector arrays, and the two Teledyne SIDECAR application specific integrated circuits that control them, are operated in space at T approx. 37 K. In this article, we provide a brief introduction to NIRSpec, its detector subsystem (DS), detector readout in the space radiation environment, and present a snapshot of the developmental status of the NIRSpec DS as integration and testing of the engineering test unit begins.

Published
2007

6. JWST near infrared detectors: latest test results

Author

Smith, Erin C., primary, Rauscher, Bernard J., additional, Alexander, David, additional, Clemons, Brian L., additional, Engler, Chuck, additional, Garrison, Matthew B., additional, Hill, Robert J., additional, Johnson, Thomas, additional, Lindler, Don J., additional, Manthripragada, Sridhar s., additional, Marshall, Cheryl, additional, Mott, Brent, additional, Parr, Thomas M., additional, Roher, Wayne D., additional, Shakoorzadeh, Kamdin B., additional, Schnurr, Richard, additional, Waczynski, Augustyn, additional, Wen, Yiting, additional, Wilson, Donna, additional, Loose, Markus, additional, Bagnasco, Giorgio, additional, Böker, Torsten, additional, De Marchi, Guido, additional, Ferruit, Pierre, additional, Jakobsen, Peter, additional, and Strada, Paolo, additional

Published
2009
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7. James Webb Space Telescope Near-Infrared Spectrograph: dark performance of the first flight candidate detector arrays

Author

Rauscher, Bernard J., primary, Alexander, David, additional, Brambora, Clifford K., additional, Chiao, Meng, additional, Clemons, Brian L., additional, Derro, Rebecca, additional, Engler, Charles, additional, Fox, Ori, additional, Garrison, Matthew B., additional, Greenhouse, Matthew A., additional, Henegar, Greg, additional, Hill, Robert J., additional, Johnson, Thomas, additional, Lavaque, Rodolfo J., additional, Lindler, Don J., additional, Manthripragada, Sridhar S., additional, Marshall, Cheryl, additional, Mott, Brent, additional, Parr, Thomas M., additional, Roher, Wayne D., additional, Shakoorzadeh, Kamdin B., additional, Smith, Miles, additional, Waczynski, Augustyn, additional, Wen, Yiting, additional, Wilson, Donna, additional, Ballard, Mary, additional, Cabelli, Craig, additional, Cheng, Edward, additional, Garnett, James, additional, Koch, Elliott, additional, Loose, Markus, additional, Zandian, Majid, additional, Zino, Joseph, additional, Ellis, Timothy, additional, Howe, Bryan, additional, Jurado, Miriam, additional, Lee, Ginn, additional, Nieznanski, John, additional, Wallis, Peter, additional, York, James, additional, Regan, Michael W., additional, Bagnasco, Giorgio, additional, Böker, Torsten, additional, De Marchi, Guido, additional, Ferruit, Pierre, additional, Jakobsen, Peter, additional, and Strada, Paolo, additional

Published
2008
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8. Characterization of the detector subsystem for the near-infrared spectrograph (NIRSpec) on the James Webb Space Telescope

Author

Mott, D. Brent, primary, Waczynski, Augustyn, additional, Wen, Yiting, additional, Rauscher, Bernard J., additional, Boehm, Nicholas, additional, Chiao, Meng P., additional, Degumbia, Lantrinh, additional, Delo, Greg, additional, Foltz, Roger, additional, Kan, Emily, additional, Alexander, David, additional, Cabelli, Craig, additional, Clemons, Brian, additional, Connelly, Joseph, additional, Dea, Alex, additional, Derro, Rebecca, additional, Engler, Charles, additional, Feizi, Ali, additional, Fox, Ori, additional, Hill, Robert J., additional, Johnson, Thomas E., additional, Lander, Matthew, additional, Lindler, Don J., additional, Loose, Markus, additional, Manthripragada, Sridhar S., additional, Novo-Gradac, Kevin, additional, Roher, Wayne D., additional, Rosenberry, Robert, additional, Shakoorzadeh, Kamdin, additional, Smith, Miles T., additional, Wilson, Donna, additional, and Zino, Joseph, additional

Published
2008
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9. Detector arrays for the James Webb Space Telescope near-infrared spectrograph

Author

Rauscher, Bernard J., primary, Alexander, David, additional, Brambora, Clifford K., additional, Derro, Rebecca, additional, Engler, Chuck, additional, Fox, Ori, additional, Garrison, Matthew B., additional, Henegar, Greg, additional, Hill, Robert J., additional, Johnson, Thomas, additional, Lindler, Don J., additional, Manthripragada, Sridhar S., additional, Marshall, Cheryl, additional, Mott, Brent, additional, Parr, Thomas M., additional, Roher, Wayne D., additional, Shakoorzadeh, Kamdin B., additional, Smith, Miles, additional, Waczynski, Augustyn, additional, Wen, Yiting, additional, Wilson, Donna, additional, Xia-Serafino, Wei, additional, Cabelli, Craig, additional, Cheng, Edward, additional, Garnett, James, additional, Loose, Markus, additional, Zandian, Majid, additional, Zino, Joseph, additional, Ellis, Timothy, additional, Howe, Bryan, additional, Jurado, Mirium, additional, Lee, Ginn, additional, Nieznanski, John, additional, Wallis, Peter, additional, York, James, additional, Regan, Michael W., additional, Bagnasco, Georgio, additional, Böker, Torsten, additional, De Marchi, Guido, additional, Ferruit, Pierre, additional, Jakobsen, Peter, additional, and Strada, Paolo, additional

Published
2007
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10. Characterization of the detector subsystem for near-infrared spectrograph (NIRSpec) on the James Webb Space Telescope

Author

Mott, D. Brent, primary, Waczynski, Augustyn, additional, Wen, Yiting, additional, Xia-Serafino, Wei, additional, Rauscher, Bernard J., additional, Hill, Robert J., additional, Delo, Greg, additional, Foltz, Roger, additional, Kan, Emily, additional, Chiao, Meng P., additional, Fox, Ori, additional, Cabelli, Craig, additional, Garnett, James, additional, Loose, Markus, additional, Wong-Anglin, Selmer, additional, Zandian, Majid, additional, Alexander, David, additional, Brambora, Clifford K., additional, Derro, Rebecca, additional, Ellis, Timothy, additional, Garrison, Matthew B., additional, Howe, Bryan, additional, Johnson, Thomas E., additional, Jurado, Miriam, additional, Manthripragada, Sridhar S., additional, Marsh, James M., additional, Marshall, Cheryl, additional, Martineau, Robert J., additional, Nieznanski, John, additional, Novo-Gradac, Kevin, additional, Roher, Wayne D., additional, Smith, Miles T., additional, Wilson, Donna, additional, and Wallis, Peter, additional

Published
2007
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11. Detectors for theJames Webb Space TelescopeNear‐Infrared Spectrograph. I. Readout Mode, Noise Model, and Calibration Considerations

Author

Rauscher, Bernard J., primary, Fox, Ori, additional, Ferruit, Pierre, additional, Hill, Robert J., additional, Waczynski, Augustyn, additional, Wen, Yiting, additional, Xia‐Serafino, Wei, additional, Mott, Brent, additional, Alexander, David, additional, Brambora, Clifford K., additional, Derro, Rebecca, additional, Engler, Chuck, additional, Garrison, Matthew B., additional, Johnson, Thomas, additional, Manthripragada, Sridhar S., additional, Marsh, James M., additional, Marshall, Cheryl, additional, Martineau, Robert J., additional, Shakoorzadeh, Kamdin B., additional, Wilson, Donna, additional, Roher, Wayne D., additional, Smith, Miles, additional, Cabelli, Craig, additional, Garnett, James, additional, Loose, Markus, additional, Wong‐Anglin, Selmer, additional, Zandian, Majid, additional, Cheng, Edward, additional, Ellis, Timothy, additional, Howe, Bryan, additional, Jurado, Miriam, additional, Lee, Ginn, additional, Nieznanski, John, additional, Wallis, Peter, additional, York, James, additional, Regan, Michael W., additional, Hall, Donald N. B., additional, Hodapp, Klaus W., additional, Böker, Torsten, additional, De Marchi, Guido, additional, Jakobsen, Peter, additional, and Strada, Paolo, additional

Published
2007
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12. James Webb Space Telescope Near-Infrared Spectrograph: dark performance of the first flight candidate detector arrays.

Author

Rauscher, Bernard J., Alexander, David, Brambora, Clifford K., Chiao, Meng, Clemons, Brian L., Derro, Rebecca, Engler, Charles, Fox, Ori, Garrison, Matthew B., Greenhouse, Matthew A., Henegar, Greg, Hill, Robert J., Johnson, Thomas, Lavaque, Rodolfo J., Lindler, Don J., Manthripragada, Sridhar S., Marshall, Cheryl, Mott, Brent, Parr, Thomas M., and Roher, Wayne D.

Published
2008
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13. Detector arrays for the James Webb Space Telescope near-infrared spectrograph.

Author

Rauscher, Bernard J., Alexander, David, Brambora, Clifford K., Derro, Rebecca, Engler, Chuck, Fox, Ori, Garrison, Matthew B., Henegar, Greg, Hill, Robert J., Johnson, Thomas, Lindler, Don J., Manthripragada, Sridhar S., Marshall, Cheryl, Mott, Brent, Parr, Thomas M., Roher, Wayne D., Shakoorzadeh, Kamdin B., Smith, Miles, Waczynski, Augustyn, and Wen, Yiting

Published
2007
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14. Detectors for the James Webb Space TelescopeNear-Infrared Spectrograph. I. Readout Mode, Noise Model, and Calibration Considerations

Author

Rauscher, Bernard J., Fox, Ori, Ferruit, Pierre, Hill, Robert J., Waczynski, Augustyn, Wen, Yiting, Xia-Serafino, Wei, Mott, Brent, Alexander, David, Brambora, Clifford K., Derro, Rebecca, Engler, Chuck, Garrison, Matthew B., Johnson, Thomas, Manthripragada, Sridhar S., Marsh, James M., Marshall, Cheryl, Martineau, Robert J., Shakoorzadeh, Kamdin B., Wilson, Donna, Roher, Wayne D., Smith, Miles, Cabelli, Craig, Garnett, James, Loose, Markus, Wong-Anglin, Selmer, Zandian, Majid, Cheng, Edward, Ellis, Timothy, Howe, Bryan, Jurado, Miriam, Lee, Ginn, Nieznanski, John, Wallis, Peter, York, James, Regan, Michael W., Hall, Donald N. B., Hodapp, Klaus W., Böker, Torsten, De Marchi, Guido, Jakobsen, Peter, and Strada, Paolo

Abstract

We describe how the James Webb Space Telescope(JWST) Near-Infrared Spectrograph's (NIRSpec) detectors will be read out, and present a model of how noise scales with the number of multiple nondestructive reads sampling up the ramp. We believe that this noise model, which is validated using real and simulated test data, is applicable to most astronomical near-infrared instruments. We describe some nonideal behaviors that have been observed in engineering-grade NIRSpec detectors, and demonstrate that they are unlikely to affect NIRSpec sensitivity, operations, or calibration. These include a HAWAII-2RG reset anomaly and random telegraph noise (RTN). Using real test data, we show that the reset anomaly is (1) very nearly noiseless and (2) can be easily calibrated out. Likewise, we show that large-amplitude RTN affects only a small and fixed population of pixels. It can therefore be tracked using standard pixel operability maps.

Published
2007
Full Text
View/download PDF

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