Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward
The James Webb Space Telescope (JWST) is the successor to the Hubble Space Telescope. JWST will be an infrared-optimized telescope, with an approximately 6.5 m diameter primary mirror, that is located at the Sun-Earth L2 Lagrange point. Three of JWST’s four science instruments use Teledyne HgCdTe HA...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2012-06-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4733534 |
| _version_ | 1819081070435368960 |
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| author | Bernard J. Rauscher Carl Stahle Robert J. Hill Matthew Greenhouse James Beletic Sachidananda Babu Peter Blake Keith Cleveland Emmanuel Cofie Bente Eegholm C. W. Engelbracht Donald N. B. Hall Alan Hoffman Basil Jeffers Christine Jhabvala Randy A. Kimble Stanley Kohn Robert Kopp Don Lee Henning Leidecker Don Lindler Robert E. McMurray Jr. Karl Misselt D. Brent Mott Raymond Ohl Judith L. Pipher Eric Piquette Dan Polis Jim Pontius Marcia Rieke Roger Smith W. E. Tennant Liqin Wang Yiting Wen Christopher N. A. Willmer Majid Zandian |
| author_facet | Bernard J. Rauscher Carl Stahle Robert J. Hill Matthew Greenhouse James Beletic Sachidananda Babu Peter Blake Keith Cleveland Emmanuel Cofie Bente Eegholm C. W. Engelbracht Donald N. B. Hall Alan Hoffman Basil Jeffers Christine Jhabvala Randy A. Kimble Stanley Kohn Robert Kopp Don Lee Henning Leidecker Don Lindler Robert E. McMurray Jr. Karl Misselt D. Brent Mott Raymond Ohl Judith L. Pipher Eric Piquette Dan Polis Jim Pontius Marcia Rieke Roger Smith W. E. Tennant Liqin Wang Yiting Wen Christopher N. A. Willmer Majid Zandian |
| author_sort | Bernard J. Rauscher |
| collection | DOAJ |
| description | The James Webb Space Telescope (JWST) is the successor to the Hubble Space Telescope. JWST will be an infrared-optimized telescope, with an approximately 6.5 m diameter primary mirror, that is located at the Sun-Earth L2 Lagrange point. Three of JWST’s four science instruments use Teledyne HgCdTe HAWAII-2RG (H2RG) near infrared detector arrays. During 2010, the JWST Project noticed that a few of its 5 μm cutoff H2RG detectors were degrading during room temperature storage, and NASA chartered a “Detector Degradation Failure Review Board” (DD-FRB) to investigate. The DD-FRB determined that the root cause was a design flaw that allowed indium to interdiffuse with the gold contacts and migrate into the HgCdTe detector layer. Fortunately, Teledyne already had an improved design that eliminated this degradation mechanism. During early 2012, the improved H2RG design was qualified for flight and JWST began making additional H2RGs. In this article, we present the two public DD-FRB “Executive Summaries” that: (1) determined the root cause of the detector degradation and (2) defined tests to determine whether the existing detectors are qualified for flight. We supplement these with a brief introduction to H2RG detector arrays, some recent measurements showing that the performance of the improved design meets JWST requirements, and a discussion of how the JWST Project is using cryogenic storage to retard the degradation rate of the existing flight spare H2RGs. |
| first_indexed | 2024-12-21T19:54:56Z |
| format | Article |
| id | doaj.art-71242a0bdc544615a6836e11af283b17 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T19:54:56Z |
| publishDate | 2012-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-71242a0bdc544615a6836e11af283b172022-12-21T18:52:07ZengAIP Publishing LLCAIP Advances2158-32262012-06-0122021901021901-1810.1063/1.4733534073202ADVCommentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forwardBernard J. Rauscher0Carl Stahle1Robert J. Hill2Matthew Greenhouse3James Beletic4Sachidananda Babu5Peter Blake6Keith Cleveland7Emmanuel Cofie8Bente Eegholm9C. W. Engelbracht10Donald N. B. Hall11Alan Hoffman12Basil Jeffers13Christine Jhabvala14Randy A. Kimble15Stanley Kohn16Robert Kopp17Don Lee18Henning Leidecker19Don Lindler20Robert E. McMurray Jr.21Karl Misselt22D. Brent Mott23Raymond Ohl24Judith L. Pipher25Eric Piquette26Dan Polis27Jim Pontius28Marcia Rieke29Roger Smith30W. E. Tennant31Liqin Wang32Yiting Wen33Christopher N. A. Willmer34Majid Zandian35NIRSpec Detector Scientist, Observational Cosmology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USANASA Detector Degradation Failure Review Board Chair, Instrument Systems and Technology Division, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USANASA Detector Degradation Failure Review Board Assistant Chair, Observational Cosmology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAIntegrated Science Instruments Module Project Scientist, Observational Cosmology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USADetector Systems Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAOptics Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAMission Assurance Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAMechanical Systems Analysis & Simulations Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAOptics Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USASteward Observatory, University of Arizona, Tucson, AZ, 85721, USAInstitute for Astronomy, University of Hawaii, Hilo, HI, 96720, USAAcumen Scientific, Goleta, CA, 93117, USAParts Engineering Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USADetector Systems Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAIntegration & Test Project Scientist, Exoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAAerospace Corporation, El Segundo, CA, 90245, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USAElectrical Engineering Division, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAExoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAInstrument Technology Branch, NASA Ames Research Center, Moffett Field, CA, 94035, USASteward Observatory, University of Arizona, Tucson, AZ, 85721, USADetector Systems Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAOptics Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAFGS Detector Scientist, Dept. of Physics & Astronomy, University of Rochester, Rochester, NY, 14627, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USAMaterials Engineering Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USAMechanical Systems Analysis & Simulations Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USANIRCam Principal Investigator, Steward Observatory, University of Arizona, Tucson, AZ, 85721, USACalifornia Institute of Technology, Pasadena, CA, 91125, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USAMaterials Engineering Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USADetector Systems Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USASteward Observatory, University of Arizona, Tucson, AZ, 85721, USATeledyne Imaging Sensors, 5212 Verdugo Way, Camarillo, CA, 93012, USAThe James Webb Space Telescope (JWST) is the successor to the Hubble Space Telescope. JWST will be an infrared-optimized telescope, with an approximately 6.5 m diameter primary mirror, that is located at the Sun-Earth L2 Lagrange point. Three of JWST’s four science instruments use Teledyne HgCdTe HAWAII-2RG (H2RG) near infrared detector arrays. During 2010, the JWST Project noticed that a few of its 5 μm cutoff H2RG detectors were degrading during room temperature storage, and NASA chartered a “Detector Degradation Failure Review Board” (DD-FRB) to investigate. The DD-FRB determined that the root cause was a design flaw that allowed indium to interdiffuse with the gold contacts and migrate into the HgCdTe detector layer. Fortunately, Teledyne already had an improved design that eliminated this degradation mechanism. During early 2012, the improved H2RG design was qualified for flight and JWST began making additional H2RGs. In this article, we present the two public DD-FRB “Executive Summaries” that: (1) determined the root cause of the detector degradation and (2) defined tests to determine whether the existing detectors are qualified for flight. We supplement these with a brief introduction to H2RG detector arrays, some recent measurements showing that the performance of the improved design meets JWST requirements, and a discussion of how the JWST Project is using cryogenic storage to retard the degradation rate of the existing flight spare H2RGs.http://dx.doi.org/10.1063/1.4733534 |
| spellingShingle | Bernard J. Rauscher Carl Stahle Robert J. Hill Matthew Greenhouse James Beletic Sachidananda Babu Peter Blake Keith Cleveland Emmanuel Cofie Bente Eegholm C. W. Engelbracht Donald N. B. Hall Alan Hoffman Basil Jeffers Christine Jhabvala Randy A. Kimble Stanley Kohn Robert Kopp Don Lee Henning Leidecker Don Lindler Robert E. McMurray Jr. Karl Misselt D. Brent Mott Raymond Ohl Judith L. Pipher Eric Piquette Dan Polis Jim Pontius Marcia Rieke Roger Smith W. E. Tennant Liqin Wang Yiting Wen Christopher N. A. Willmer Majid Zandian Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward AIP Advances |
| title | Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward |
| title_full | Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward |
| title_fullStr | Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward |
| title_full_unstemmed | Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward |
| title_short | Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward |
| title_sort | commentary jwst near infrared detector degradation finding the problem fixing the problem and moving forward |
| url | http://dx.doi.org/10.1063/1.4733534 |
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