Pub Date : 2023-11-02DOI: 10.1117/1.jatis.10.1.011202
H. Philip Stahl
The Webb Space Telescope’s on-orbit performance was made possible by successful in-process optical testing and cryogenic requirement compliance certification, verification, and validation of the Webb optical components. This was accomplished by the hard work of dozens of optical metrologists, the development and qualification of multiple custom test setups, and several inventions, including 4D PhaseCam and Leica absolute distance meter. We define a set of rules for optical metrology and summarize how they were applied to the metrology tools, test setups, and processes used to characterize the Webb Space Telescope primary mirror segment assemblies.
{"title":"Rules for optical metrology: Webb primary mirror case study","authors":"H. Philip Stahl","doi":"10.1117/1.jatis.10.1.011202","DOIUrl":"https://doi.org/10.1117/1.jatis.10.1.011202","url":null,"abstract":"The Webb Space Telescope’s on-orbit performance was made possible by successful in-process optical testing and cryogenic requirement compliance certification, verification, and validation of the Webb optical components. This was accomplished by the hard work of dozens of optical metrologists, the development and qualification of multiple custom test setups, and several inventions, including 4D PhaseCam and Leica absolute distance meter. We define a set of rules for optical metrology and summarize how they were applied to the metrology tools, test setups, and processes used to characterize the Webb Space Telescope primary mirror segment assemblies.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-02DOI: 10.1117/1.jatis.10.1.011203
H. Philip Stahl
Pathways to Discovery in Astronomy and Astrophysics for the 2020s has recommended a Great Observatory Maturation Program (GOMaP) to invest in co-maturation of mission concepts and technologies to inform an analysis of alternatives study for an ∼6 m off-axis inscribed telescope. The purpose of this telescope is to sample atmospheric spectra of around 25 potentially habitable exoplanets using ultraviolet, visible, and near-infrared wavelengths; it is planned to launch in the early 2040s with a total cost of less than $11B, including 5 years of operation. A historical review of past missions yields basic programmatic lessons learned to be considered as the community prepares to implement the Decadal Vision. First, technology development is critical for enabling missions. The robustness, breadth, and duration of concept/technology co-maturation is important for mission success. Second, NASA has never “exactly” implemented a Decadal mission as it was recommended. Third, all missions have the same basic technology challenges of mass constraints: mechanical and thermal stability to design, building a space telescope that achieves the required on-orbit performance, and verifying and validating that performance by test and model correlation. Finally, Decadal missions require sustained community support.
{"title":"Large mission implementation lessons from history","authors":"H. Philip Stahl","doi":"10.1117/1.jatis.10.1.011203","DOIUrl":"https://doi.org/10.1117/1.jatis.10.1.011203","url":null,"abstract":"Pathways to Discovery in Astronomy and Astrophysics for the 2020s has recommended a Great Observatory Maturation Program (GOMaP) to invest in co-maturation of mission concepts and technologies to inform an analysis of alternatives study for an ∼6 m off-axis inscribed telescope. The purpose of this telescope is to sample atmospheric spectra of around 25 potentially habitable exoplanets using ultraviolet, visible, and near-infrared wavelengths; it is planned to launch in the early 2040s with a total cost of less than $11B, including 5 years of operation. A historical review of past missions yields basic programmatic lessons learned to be considered as the community prepares to implement the Decadal Vision. First, technology development is critical for enabling missions. The robustness, breadth, and duration of concept/technology co-maturation is important for mission success. Second, NASA has never “exactly” implemented a Decadal mission as it was recommended. Third, all missions have the same basic technology challenges of mass constraints: mechanical and thermal stability to design, building a space telescope that achieves the required on-orbit performance, and verifying and validating that performance by test and model correlation. Finally, Decadal missions require sustained community support.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1117/1.jatis.10.1.011205
Allison Barto, Paul Lightsey, Tim Schoeneweis, Gregory D. Wirth
With a long history of involvement in NASA flagship astrophysics missions, Ball Aerospace has made key contributions to Hubble, the new James Webb Space Telescope, and the upcoming Nancy Grace Roman Space Telescope. Here, we share lessons on both technical and programmatic topics gleaned from decades of productive experience in constructing system performance budgets, accelerating the initial design process, defining the philosophical approach to requirements, planning for serviceability, leveraging design complexity, accounting for subsystem interactions, breaking down barriers to cross-team collaboration, building a team capable of meeting long-term goals, integrating the customer into the enterprise, and promoting a team mindset that enables high achievement in the face of immense challenges. The teams designing and building the future Habitable Worlds Observatory can apply this knowledge to complete the next flagship mission more quickly and effectively with less expense.
{"title":"Achieving success in flagship missions: technical and programmatic insights from Ball Aerospace’s legacy","authors":"Allison Barto, Paul Lightsey, Tim Schoeneweis, Gregory D. Wirth","doi":"10.1117/1.jatis.10.1.011205","DOIUrl":"https://doi.org/10.1117/1.jatis.10.1.011205","url":null,"abstract":"With a long history of involvement in NASA flagship astrophysics missions, Ball Aerospace has made key contributions to Hubble, the new James Webb Space Telescope, and the upcoming Nancy Grace Roman Space Telescope. Here, we share lessons on both technical and programmatic topics gleaned from decades of productive experience in constructing system performance budgets, accelerating the initial design process, defining the philosophical approach to requirements, planning for serviceability, leveraging design complexity, accounting for subsystem interactions, breaking down barriers to cross-team collaboration, building a team capable of meeting long-term goals, integrating the customer into the enterprise, and promoting a team mindset that enables high achievement in the face of immense challenges. The teams designing and building the future Habitable Worlds Observatory can apply this knowledge to complete the next flagship mission more quickly and effectively with less expense.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1117/1.jatis.10.1.011204
Lee D. Feinberg, Michael W. McElwain, Charles W. Bowers, John D. Johnston, Gary E. Mosier, Randy A. Kimble, Joshua S. Levi, Paul Lightsey, J. Scott Knight, Marcel Bluth, Alden S. Jurling, Marie B. Levine, D. Scott Acton, Charles Atkinson, Allison Barto, Matthew D. Bergkoetter, Gregory R. Brady, Larkin Carey, Lester Cohen, Laura Coyle, Bruce H. Dean, Michael Eisenhower, Nicolas Flagey, George F. Hartig, Keith A. Havey, Brian Hicks, Joseph M. Howard, Ritva A. Keski-Kuha, Charles-Philippe Lajoie, Matthew D. Lallo, Gary W. Matthews, Marcio Meléndez, Michael T. Menzel, Sang Park, Marshall D. Perrin, Laurent Pueyo, Lisbeth Quesnel, Paul Reynolds, Jane R. Rigby, Babak N. Saif, Christopher C. Stark, Randal Telfer, Scott C. Texter, Julie M. Van Campen, Begoña Vila, Garrett West, Erin Wolf, Tony L. Whitman, Thomas P. Zielinski
The James Webb Space Telescope (JWST) launched on December 25, 2021, and its optical performance in orbit has been even better than predicted pre-flight. The static wavefront error (WFE) is less than half the value specified for the requirement of having diffraction-limited image quality at 2 microns in the NIRCam shortwave channel, enabling the observatory to deliver both sharper images and higher sensitivity than anticipated. In addition to the excellent image quality, the optical stability has also exceeded expectations, both in terms of high-frequency dynamic contributions (which would be perceived as part of “static WFE”) and in terms of drifts over minutes, hours, and days. Stability over long timescales is critical for several important science cases, including exoplanet transit spectroscopy and coronagraphy. JWST’s stability success was achieved through detailed design and testing, with several important lessons learned for future observatories, especially the Habitable Worlds Observatory that is expected to need even higher levels of stability. We review the stability architecture, how it was technologically demonstrated, the ground test results and improvements, the on-orbit results, and the lessons learned.
{"title":"James Webb Space Telescope optical stability lessons learned for future great observatories","authors":"Lee D. Feinberg, Michael W. McElwain, Charles W. Bowers, John D. Johnston, Gary E. Mosier, Randy A. Kimble, Joshua S. Levi, Paul Lightsey, J. Scott Knight, Marcel Bluth, Alden S. Jurling, Marie B. Levine, D. Scott Acton, Charles Atkinson, Allison Barto, Matthew D. Bergkoetter, Gregory R. Brady, Larkin Carey, Lester Cohen, Laura Coyle, Bruce H. Dean, Michael Eisenhower, Nicolas Flagey, George F. Hartig, Keith A. Havey, Brian Hicks, Joseph M. Howard, Ritva A. Keski-Kuha, Charles-Philippe Lajoie, Matthew D. Lallo, Gary W. Matthews, Marcio Meléndez, Michael T. Menzel, Sang Park, Marshall D. Perrin, Laurent Pueyo, Lisbeth Quesnel, Paul Reynolds, Jane R. Rigby, Babak N. Saif, Christopher C. Stark, Randal Telfer, Scott C. Texter, Julie M. Van Campen, Begoña Vila, Garrett West, Erin Wolf, Tony L. Whitman, Thomas P. Zielinski","doi":"10.1117/1.jatis.10.1.011204","DOIUrl":"https://doi.org/10.1117/1.jatis.10.1.011204","url":null,"abstract":"The James Webb Space Telescope (JWST) launched on December 25, 2021, and its optical performance in orbit has been even better than predicted pre-flight. The static wavefront error (WFE) is less than half the value specified for the requirement of having diffraction-limited image quality at 2 microns in the NIRCam shortwave channel, enabling the observatory to deliver both sharper images and higher sensitivity than anticipated. In addition to the excellent image quality, the optical stability has also exceeded expectations, both in terms of high-frequency dynamic contributions (which would be perceived as part of “static WFE”) and in terms of drifts over minutes, hours, and days. Stability over long timescales is critical for several important science cases, including exoplanet transit spectroscopy and coronagraphy. JWST’s stability success was achieved through detailed design and testing, with several important lessons learned for future observatories, especially the Habitable Worlds Observatory that is expected to need even higher levels of stability. We review the stability architecture, how it was technologically demonstrated, the ground test results and improvements, the on-orbit results, and the lessons learned.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.1117/1.jatis.9.4.048002
Suman Bala, Sujay Mate, Advait Mehla, Parth Sastry, N. P. S. Mithun, Sourav Palit, Mehul Vijay Chanda, Divita Saraogi, C. S. Vaishnava, Gaurav Waratkar, Varun Bhalerao, Dipankar Bhattacharya, Shriharsh Tendulkar, Santosh Vadawale
The proposed Daksha mission comprises of a pair of highly sensitive space telescopes for detecting and characterizing high-energy transients, such as electromagnetic counterparts of gravitational wave events and gamma-ray bursts (GRBs). Along with spectral and timing analysis, Daksha can also undertake polarization studies of these transients, providing data crucial for understanding the source geometry and physical processes governing high-energy emission. Each Daksha satellite will have 340 pixelated cadmium zinc telluride (CZT) detectors arranged in a quasi-hemispherical configuration without any field-of-view collimation (open detectors). These CZT detectors are good polarimeters in the energy range 100 to 400 keV, and their ability to measure polarization has been successfully demonstrated by the cadmium zinc telluride imager onboard AstroSat. Here, we demonstrate the hard x-ray polarization measurement capabilities of Daksha and estimate the polarization measurement sensitivity (in terms of the minimum detectable polarization: MDP) using extensive simulations. We find that Daksha will have MDP of 30% for a fluence threshold of 10 − 4 erg cm − 2 (in 10 to 1000 keV). We estimate that with this sensitivity, if GRBs are highly polarized, Daksha can measure the polarization of about five GRBs per year.
{"title":"Prospects of measuring gamma-ray burst polarization with the Daksha mission","authors":"Suman Bala, Sujay Mate, Advait Mehla, Parth Sastry, N. P. S. Mithun, Sourav Palit, Mehul Vijay Chanda, Divita Saraogi, C. S. Vaishnava, Gaurav Waratkar, Varun Bhalerao, Dipankar Bhattacharya, Shriharsh Tendulkar, Santosh Vadawale","doi":"10.1117/1.jatis.9.4.048002","DOIUrl":"https://doi.org/10.1117/1.jatis.9.4.048002","url":null,"abstract":"The proposed Daksha mission comprises of a pair of highly sensitive space telescopes for detecting and characterizing high-energy transients, such as electromagnetic counterparts of gravitational wave events and gamma-ray bursts (GRBs). Along with spectral and timing analysis, Daksha can also undertake polarization studies of these transients, providing data crucial for understanding the source geometry and physical processes governing high-energy emission. Each Daksha satellite will have 340 pixelated cadmium zinc telluride (CZT) detectors arranged in a quasi-hemispherical configuration without any field-of-view collimation (open detectors). These CZT detectors are good polarimeters in the energy range 100 to 400 keV, and their ability to measure polarization has been successfully demonstrated by the cadmium zinc telluride imager onboard AstroSat. Here, we demonstrate the hard x-ray polarization measurement capabilities of Daksha and estimate the polarization measurement sensitivity (in terms of the minimum detectable polarization: MDP) using extensive simulations. We find that Daksha will have MDP of 30% for a fluence threshold of 10 − 4 erg cm − 2 (in 10 to 1000 keV). We estimate that with this sensitivity, if GRBs are highly polarized, Daksha can measure the polarization of about five GRBs per year.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135813850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-26DOI: 10.1117/1.jatis.9.4.041007
Elizabeth Osborne, Jeffrey R. Olson, Michael Jacoby, Isaac Hayden, Caroline A. Kilbourne, Simon R. Bandler, Xiaoyi Li, Edgar R. Canavan, Joseph S. Adams
{"title":"Line emission mapper cryogenic system design","authors":"Elizabeth Osborne, Jeffrey R. Olson, Michael Jacoby, Isaac Hayden, Caroline A. Kilbourne, Simon R. Bandler, Xiaoyi Li, Edgar R. Canavan, Joseph S. Adams","doi":"10.1117/1.jatis.9.4.041007","DOIUrl":"https://doi.org/10.1117/1.jatis.9.4.041007","url":null,"abstract":"","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134908084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-26DOI: 10.1117/1.jatis.9.4.048001
Andrey Mukhin, Roman Krivonos, Alexey Vikhlinin, Brian Grefenstette, Kristin Madsen, Daniel Wik
The large side aperture of the Nuclear Spectroscopic Telescope Array (NuSTAR) telescope for unfocused photons (so-called stray light) is a known source of rich astrophysical information. To support many studies based on the NuSTAR stray light data, we present a fully automatic method for determining detector area suitable for background analysis and free from any kind of focused x-ray flux. The method’s main idea is “á trous” wavelet image decomposition, capable of detecting structures of any spatial scale and shape, which makes the method of general use. Applied to the NuSTAR data, the method provides a detector image region with the highest possible statistical quality, suitable for the NuSTAR stray light studies. We developed an open-source Python nuwavdet package, which implements the presented method. The package contains subroutines to generate detector image region for further stray light analysis and/or to produce a list of detector bad-flagged pixels for processing in the NuSTAR Data Analysis Software for conventional x-ray analysis.
{"title":"Wavelet-based image decomposition method for NuSTAR stray light background studies","authors":"Andrey Mukhin, Roman Krivonos, Alexey Vikhlinin, Brian Grefenstette, Kristin Madsen, Daniel Wik","doi":"10.1117/1.jatis.9.4.048001","DOIUrl":"https://doi.org/10.1117/1.jatis.9.4.048001","url":null,"abstract":"The large side aperture of the Nuclear Spectroscopic Telescope Array (NuSTAR) telescope for unfocused photons (so-called stray light) is a known source of rich astrophysical information. To support many studies based on the NuSTAR stray light data, we present a fully automatic method for determining detector area suitable for background analysis and free from any kind of focused x-ray flux. The method’s main idea is “á trous” wavelet image decomposition, capable of detecting structures of any spatial scale and shape, which makes the method of general use. Applied to the NuSTAR data, the method provides a detector image region with the highest possible statistical quality, suitable for the NuSTAR stray light studies. We developed an open-source Python nuwavdet package, which implements the presented method. The package contains subroutines to generate detector image region for further stray light analysis and/or to produce a list of detector bad-flagged pixels for processing in the NuSTAR Data Analysis Software for conventional x-ray analysis.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136381112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-25DOI: 10.1117/1.jatis.9.4.049001
Letchev, Stanimir, Crass, Jonathan, Crepp, Justin R.
The nonlinear curvature wavefront sensor (nlCWFS) offers improved sensitivity for adaptive optics (AO) systems compared to existing wavefront sensors, such as the Shack-Hartmann. The nominal nlCWFS design uses a series of imaging planes offset from the pupil along the optical propagation axis as inputs to a numerically-iterative reconstruction algorithm. Research into the nlCWFS has assumed that the device uses four measurement planes configured symmetrically around the optical system pupil. This assumption is not strictly required. In this paper, we perform the first systematic exploration of the location, number, and spatial sampling of measurement planes for the nlCWFS. Our numerical simulations show that the original, symmetric four-plane configuration produces the most consistently accurate results in the shortest time over a broad range of seeing conditions. We find that the inner measurement planes should be situated past the Talbot distance corresponding to a spatial period of $r_0$. The outer planes should be large enough to fully capture field intensity and be situated beyond a distance corresponding to a Fresnel-number-scaled equivalent of $Zapprox50$ km for a $D=0.5$ m pupil with $lambda=532$ nm. The minimum spatial sampling required for diffraction-limited performance is 4-5 pixels per $r_0$ as defined in the pupil plane. We find that neither three-plane nor five-plane configurations offer significant improvements compared to the original design. These results can impact future implementations of the nlCWFS by informing sensor design.
{"title":"Assessing phase reconstruction accuracy for different nonlinear curvature wavefront sensor configurations","authors":"Letchev, Stanimir, Crass, Jonathan, Crepp, Justin R.","doi":"10.1117/1.jatis.9.4.049001","DOIUrl":"https://doi.org/10.1117/1.jatis.9.4.049001","url":null,"abstract":"The nonlinear curvature wavefront sensor (nlCWFS) offers improved sensitivity for adaptive optics (AO) systems compared to existing wavefront sensors, such as the Shack-Hartmann. The nominal nlCWFS design uses a series of imaging planes offset from the pupil along the optical propagation axis as inputs to a numerically-iterative reconstruction algorithm. Research into the nlCWFS has assumed that the device uses four measurement planes configured symmetrically around the optical system pupil. This assumption is not strictly required. In this paper, we perform the first systematic exploration of the location, number, and spatial sampling of measurement planes for the nlCWFS. Our numerical simulations show that the original, symmetric four-plane configuration produces the most consistently accurate results in the shortest time over a broad range of seeing conditions. We find that the inner measurement planes should be situated past the Talbot distance corresponding to a spatial period of $r_0$. The outer planes should be large enough to fully capture field intensity and be situated beyond a distance corresponding to a Fresnel-number-scaled equivalent of $Zapprox50$ km for a $D=0.5$ m pupil with $lambda=532$ nm. The minimum spatial sampling required for diffraction-limited performance is 4-5 pixels per $r_0$ as defined in the pupil plane. We find that neither three-plane nor five-plane configurations offer significant improvements compared to the original design. These results can impact future implementations of the nlCWFS by informing sensor design.","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134971621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-20DOI: 10.1117/1.jatis.9.4.041006
Nicholas Wakeham, Joseph S. Adams, Simon R. Bandler, James A. Chervenak, Renata S. Cumbee, Fred M. Finkbeiner, Joshua Fuhrman, Samuel Hull, Richard L. Kelley, Caroline A. Kilbourne, Kazuhiro Sakai, Stephen J. Smith, Edward J. Wassell, Sang Yoon
Pub Date : 2023-10-20DOI: 10.1117/1.jatis.9.4.041003
Amir E. Jahromi, Peter J. Shirron
{"title":"Compact and efficient continuous adiabatic demagnetization refrigerator for line emission mapper","authors":"Amir E. Jahromi, Peter J. Shirron","doi":"10.1117/1.jatis.9.4.041003","DOIUrl":"https://doi.org/10.1117/1.jatis.9.4.041003","url":null,"abstract":"","PeriodicalId":54342,"journal":{"name":"Journal of Astronomical Telescopes Instruments and Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135616367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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