Journal of Astronomical Telescopes, Instruments, and Systems最新文献

Soft X-ray quantum efficiency of a commercial CMOS imaging sensor 商用 CMOS 成像传感器的软 X 射线量子效率

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-08-10 DOI: 10.1117/1.jatis.10.3.036001

Colin M. Packard, Steve Tammes, Philip Kaaret, Casey DeRoo, Jessica L. McChesney, John W. Freeland, Fanny Rodolakis

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Impact of particle passage and focusing from micro-pore optics for radiation damage estimates 粒子通过和微孔光学聚焦对辐射损伤估算的影响

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-08-10 DOI: 10.1117/1.jatis.10.3.034003

Michael W. J. Hubbard, Thomas W. Buggey, David Hall, Charly Feldman, J. Keelan, O. Hetherington, Steven Parsons, Timothy Arnold, Andrew Holland

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Soft X-ray quantum efficiency of a commercial CMOS imaging sensor 商用 CMOS 成像传感器的软 X 射线量子效率

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-08-10 DOI: 10.1117/1.jatis.10.3.036001

Colin M. Packard, Steve Tammes, Philip Kaaret, Casey DeRoo, Jessica L. McChesney, John W. Freeland, Fanny Rodolakis

引用次数: 0

Optimizing the electroforming process for full-shell X-ray optics 优化全壳 X 射线光学器件的电铸工艺

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-07-16 DOI: 10.1117/1.jatis.10.3.034001

Panini Singam, C. Speegle, Amy Meekham, J. Kolodziejczak, David Banks, Wayne Baumgartner, Jessica Gaskin, S. Bongiorno, Brian Ramsey, David D. Smith, D. Gurgew, Nicholas E. Thomas

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Scientific impact of a noiseless energy-resolving detector for a future exoplanet-imaging mission 用于未来系外行星成像任务的无噪声能量分辨探测器的科学影响

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-05-23 DOI: 10.1117/1.jatis.10.2.025008

Alex R. Howe, Christopher C. Stark, John E. Sadleir

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High-speed atomic oxygen irradiation of atomically thin graphene for astronomical applications 原子氧高速辐照原子薄石墨烯的天文应用

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-05-22 DOI: 10.1117/1.jatis.10.2.026006

Kazuto Kashiwakura, I. Mitsuishi, Midori Hirota, Yoshimi Niwa, Y. Tawara, Ryo Kitaura, H. Omachi, Masahito Tagawa, Kentaro Nomoto, Kazuyuki Tsuruoka, K. Kawahara, Hiroki Ago

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High-efficiency anti-reflective modification of freeform elements and cylindrical lenses for arrayed wide-field astronomical corrector units 用于阵列式宽视场天文校正器单元的自由曲面元件和圆柱透镜的高效抗反射改装件

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-05-16 DOI: 10.1117/1.jatis.10.2.025007

Uma Subash, Hanshin Lee, M. Poutous

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Modeling and performance analysis of implicit electric field conjugation with two deformable mirrors applied to the Roman Coronagraph 应用于 Roman Coronagraph 的带两个可变形反射镜的隐式电场共轭的建模和性能分析

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2024-05-06 DOI: 10.1117/1.JATIS.10.2.029001

Kian Milani, Ewan Douglas, S. Haffert, K. V. Gorkom

{"title":"Modeling and performance analysis of implicit electric field conjugation with two deformable mirrors applied to the Roman Coronagraph","authors":"Kian Milani, Ewan Douglas, S. Haffert, K. V. Gorkom","doi":"10.1117/1.JATIS.10.2.029001","DOIUrl":"https://doi.org/10.1117/1.JATIS.10.2.029001","url":null,"abstract":"High-order wavefront sensing and control (HOWFSC) is key to create a dark hole region within the coronagraphic image plane where high contrasts are achieved. The Roman Coronagraph is expected to perform its HOWFSC with a ground-in-the-loop scheme due to the computational complexity of the Electric Field Conjugation (EFC) algorithm. This scheme provides the flexibility to alter the HOWFSC algorithm for given science objectives. The baseline HOWFSC scheme involves running EFC while observing a bright star such as {zeta} Puppis to create the initial dark hole followed by a slew to the science target. The new implicit EFC (iEFC) algorithm removes the optical diffraction model from the controller, making the final contrast independent of model accuracy. While previously demonstrated with a single DM, iEFC is extended to two deformable mirror systems in order to create annular dark holes. The algorithm is then applied to the Wide-Field-of-View Shaped Pupil Coronagraph (SPC-WFOV) mode designed for the Roman Space Telescope using end-to-end physical optics models. Initial monochromatic simulations demonstrate the efficacy of iEFC as well as the optimal choice of modes for the SPC-WFOV instrument. Further simulations with a 3.6% wavefront control bandpass and a broader 10% bandpass then demonstrate that iEFC can be used in broadband scenarios to achieve contrasts below 1E-8 with Roman. Finally, an EMCCD model is implemented to estimate calibration times and predict the controller's performance. Here, 1E-8 contrasts are achieved with a calibration time of about 6.8 hours assuming the reference star is {zeta} Puppis. The results here indicate that iEFC can be a valid HOWFSC method that can mitigate the risk of model errors associated with space-borne coronagraphs, but to maximize iEFC performance, lengthy calibration times will be required to mitigate the noise accumulated during calibration.","PeriodicalId":508807,"journal":{"name":"Journal of Astronomical Telescopes, Instruments, and Systems","volume":"5 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141006053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emulating and characterizing strong turbulence conditions for space-to-ground optical links: the PICOLO bench 模拟和描述空地光链路的强湍流条件：PICOLO 工作台

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2023-10-01 DOI: 10.1117/1.JATIS.9.4.049002

Pablo Robles, Cyril Petit, M. Velluet, Louis Le Leuch, A. Montmerle-Bonnefois, L. Paillier, J. Conan, Frédéric Cassaing, J. Montri, Benoit Neichel, N. Védrenne

引用次数: 0

Machine-learning approach for optimal self-calibration and fringe tracking in photonic nulling interferometry 光子归零干涉测量中优化自校准和条纹跟踪的机器学习方法

Journal of Astronomical Telescopes, Instruments, and Systems Pub Date : 2023-10-01 DOI: 10.1117/1.JATIS.9.4.048005

B. Norris, M. Martinod, P. Tuthill, Simon Gross, N. Cvetojevic, Nemanja Jovanovic, T. Lagadec, Teresa Klinner-Teo, O. Guyon, J. Lozi, V. Deo, S. Vievard, Alex Arriola, T. Gretzinger, Jon Lawrence, M. Withford

{"title":"Machine-learning approach for optimal self-calibration and fringe tracking in photonic nulling interferometry","authors":"B. Norris, M. Martinod, P. Tuthill, Simon Gross, N. Cvetojevic, Nemanja Jovanovic, T. Lagadec, Teresa Klinner-Teo, O. Guyon, J. Lozi, V. Deo, S. Vievard, Alex Arriola, T. Gretzinger, Jon Lawrence, M. Withford","doi":"10.1117/1.JATIS.9.4.048005","DOIUrl":"https://doi.org/10.1117/1.JATIS.9.4.048005","url":null,"abstract":"Abstract. Photonic technologies have enabled a generation of nulling interferometers, such as the guided light interferometric nulling technology instrument, potentially capable of imaging exoplanets and circumstellar structure at extreme contrast ratios by suppressing contaminating starlight, and paving the way to the characterization of habitable planet atmospheres. But even with cutting-edge photonic nulling instruments, the achievable starlight suppression (null-depth) is only as good as the instrument’s wavefront control and its accuracy is only as good as the instrument’s calibration. Here, we present an approach wherein outputs from non-science channels of a photonic nulling chip are used as a precise null-depth calibration method and can also be used in real time for fringe tracking. This is achieved using a deep neural network to learn the true in-situ complex transfer function of the instrument and then predict the instrumental leakage contribution (at millisecond timescales) for the science (nulled) outputs, enabling accurate calibration. In this method, this pseudo-real-time approach is used instead of the statistical methods used in other techniques (such as null self calibration, or NSC) and also resolves the severe effect of read-noise seen when NSC is used with some detector types.","PeriodicalId":508807,"journal":{"name":"Journal of Astronomical Telescopes, Instruments, and Systems","volume":"335 1","pages":"048005 - 048005"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0