Mr. Logan Jensen Profile

Logan Jensen

Area of Expertise:

TVAC Chambers , Contamination Control , Small Satellites , Astrophysics , Telescopes , Assembly, Integration, and Testing

Websites:

Company Website

Publications (15)

Proceedings Article | 8 November 2024 Open Access

Open Access

Paper

Assembly, integration, and laboratory testing of the EXCITE spectrograph (Erratum)

Lee Bernard, Johnathan Gamaunt, Logan Jensen, Andrea Bocchieri, Nat Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, Conor Earley, Qian Gong, John Hartley, Kyle Helson, Daniel Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, C. Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Javier Romualdez, Subhajit Sarkar, Paul Scowen, Greg Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 13096, 13096AL (2024) https://doi.org/10.1117/12.3056735

Read Abstract +

Proceedings Article | 11 September 2024 Poster + Paper

Poster + Paper

The Exoplanet Climate Infrared Telescope (EXCITE): gondola pointing and stabilization qualification

Javier Romualdez, Lee Bernard, Andrea Bocchieri, Nathaniel Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, Johnathan Gamaunt, Qian Gong, John Hartley, Kyle Helson, Logan Jensen, Daniel Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Ed Leong, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, C. Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Subhajit Sarkar, Paul Scowen, Gregory Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 13094, 130944Y (2024) https://doi.org/10.1117/12.3018442

KEYWORDS: Infrared Imaging Spectrograph, Precision calibration, Diffraction limit, Acquisition tracking and pointing, Mirror stabilization, Telescopes, Cameras, Stars, Cryocoolers, Vibration, Infrared telescopes, Exoplanets, Equipment, Calibration

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Proceedings Article | 21 August 2024 Poster + Paper

Poster + Paper

Photometric calibration in the ultraviolet of the Star-Planet Activity Research CubeSat (SPARCS)

David Ardila, Evgenya Shkolnik, Paul Scowen, Tahina Ramiaramanantsoa, Travis Barman, Judd Bowman, Christophe Basset, Jonathan Gamaunt, Dawn Gregory, Daniel Jacobs, Logan Jensen, April Jewell, Matthew Kolopanis, Mary Knapp, Gillian Kyne, Cristy Ladwig, Joe Llama, Victoria Meadows, Shouleh Nikzad, Sarah Peacock, Nathaniel Struebel, Mark Swain

Proceedings Volume 13093, 1309338 (2024) https://doi.org/10.1117/12.3019065

KEYWORDS: Calibration, Ultraviolet radiation, Stars, Exoplanets, Charge-coupled devices, Sensors

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Proceedings Article | 21 August 2024 Presentation + Paper

Presentation + Paper

Performance of the SPARCS UV camera and detectors

April Jewell, Christophe Basset, Shouleh Nikzad, Gillian Kyne, Yuki Maruyama, Nathan Bush, John Hennessy, Todd Jones, Matthew Klein, Steve Monacos, Robin Rodriguez, David Ardila, Judd Bowman, Jonathan Gamaunt, Dawn Gregory, Daniel Jacobs, Logan Jensen, Matthew Kolopanis, Cristy Ladwig, Tahina Ramiaramanantsoa, Paul Scowen, Nathaniel Strubel, Evgenya Shkolnik

Proceedings Volume 13093, 1309304 (2024) https://doi.org/10.1117/12.3018492

KEYWORDS: Sensors, Ultraviolet detectors, Bandpass filters, Far ultraviolet, Cameras, Tunable filters, Near ultraviolet, Ultraviolet coatings, Ultraviolet telescopes

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Proceedings Article | 21 August 2024 Poster + Paper

Poster + Paper

Assembly, integration, and testing of the Star-Planet Activity Research CubeSat (SPARCS)

Logan Jensen, John Gamaunt, Paul Scowen, Nathaniel Struebel, Liam O'Mara, Neil Naik, David Ardila, Jim Austin, Travis Barman, Christophe Basset, Matthew Beasley, Lee Bernard, Judd Bowman, Nathaniel Butler, Dawn Gregory, April Jewell, Mary Knapp, Daniel Jacobs, Matthew Kolopanis, Cristy Ladwig, Joe Llama, Victoria Meadows, Shouleh Nikzad, Sarah Peacock, Tahina Ramiaramanantsoa, Titu Samson, Evgenya Shkolnik, Mark Swain, Todd Veach

Proceedings Volume 13093, 1309337 (2024) https://doi.org/10.1117/12.3018163

KEYWORDS: Far ultraviolet, Sensors, Vacuum chambers, Ultraviolet radiation, Reflectivity, Optical fabrication, Bandpass filters, Telescopes, Space operations, Reflection

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Proceedings Article | 30 July 2024 Poster + Paper

Poster + Paper

Assembly, integration, and laboratory testing of the EXCITE spectrograph

Lee Bernard, Johnathan Gamaunt, Logan Jensen, Andrea Bocchieri, Nat Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, Conor Earley, Qian Gong, John Hartley, Kyle Helson, Daniel Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, C. Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Javier Romualdez, Subhajit Sarkar, Paul Scowen, Greg Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 13096, 13096A5 (2024) https://doi.org/10.1117/12.3019286

KEYWORDS: Spectrographs, Design, Optical alignment, Telescopes, Tolerancing, Exoplanets, Mirrors, Infrared telescopes, Titanium

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

Integration and testing of a cryogenic receiver for the Exoplanet Climate Infrared Telescope (EXCITE)

Annalies Kleyheeg, Lee Bernard, Andrea Bocchieri, Nat Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, John Gamaunt, Qian Gong, John Hartley, Kyle Helson, Logan Jensen, Daniel Kelly, Kanchita Klangboonkrong, Ed Leong, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Javier Romualdez, Subhajit Sarkar, Paul Scowen, Gregory Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 13096, 130963P (2024) https://doi.org/10.1117/12.3020522

KEYWORDS: Cryocoolers, Cryogenics, Cryostats, Vibration, Sensors, Receivers, Copper, Aluminum, Spectrographs, Control systems

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

Star-Planet Activity Research CubeSat (SPARCS): instrument vacuum testing setup

Johnathan Gamaunt, Logan Jensen, Paul Scowen, David Ardila, Nathaniel Struebel, Tahina Ramiaramanantsoa, Daniel Jacobs, April Jewell, Shouleh Nikzad, Evgenya Shkolnik

Proceedings Volume 12181, 121813L (2022) https://doi.org/10.1117/12.2630555

KEYWORDS: Sensors, Interfaces, Space operations, Thermal modeling, Optical fabrication, Telescopes, Data modeling, Contamination, Ultraviolet radiation, Field programmable gate arrays

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

Star-Planet Activity Research CubeSat (SPARCS): science payload assembly, integration, and testing plan

Logan Jensen, Johnathan Gamaunt, Paul Scowen, Matthew Beasley, Jim Austin, Todd Veach, Evgenya Shkolnik, Nathaniel Struebel, Daniel Jacobs, Judd Bowman, Tahina Ramiaramanantsoa

Proceedings Volume 12181, 121813K (2022) https://doi.org/10.1117/12.2629562

KEYWORDS: Sensors, Telescopes, Space operations, Ultraviolet radiation, Calibration, Optical fabrication, Mirrors, Signal to noise ratio, Photodiodes, UV optics

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Proceedings Article | 29 August 2022 Paper

Paper

Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope

Lee Bernard, Logan Jensen, John Gamaunt, Nat Butler, Andrea Bocchieri, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, Qian Gong, John Hartley, Kyle Helson, Dan Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Javier Romualdez, Subhajit Sarkar, Paul Scowen, Gregory Tucker, Augustyn Waczynski, Ingo Waldman

Proceedings Volume 12184, 1218429 (2022) https://doi.org/10.1117/12.2629717

KEYWORDS: Spectrographs, Mirrors, Tolerancing, Collimation, Telescopes, Prototyping, Optical alignment, Infrared telescopes, Diffraction, Astronomical spectrometers

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Proceedings Article | 29 August 2022 Paper

Paper

The EXoplanet Climate Infrared TElescope (EXCITE)

Peter Nagler, Lee Bernard, Andrea Bocchieri, Nat Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, John Gamaunt, Qian Gong, John Hartley, Kyle Helson, Logan Jensen, Daniel P. Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Nikole K. Lewis, Steven Li, Michael Line, Stephen F. Maher, Ryan McClelland, Laddawan R. Miko, Lorenzo V. Mugnai, C. Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Tim Rehm, Javier Romualdez, Subhajit Sarkar, Paul A. Scowen, Gregory S. Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 12184, 121840V (2022) https://doi.org/10.1117/12.2629373

KEYWORDS: Phase measurement, Spectroscopy, Exoplanets, Telescopes, Sensors, Stars, Planets, Receivers, Mirrors, Cryocoolers

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The design and development status of the cryogenic receiver for the EXoplanet Climate Infrared TELescope (EXCITE)

Tim Rehm, Lee Bernard, Andrea Bocchieri, Nat Butler, Quentin Changeat, Azzurra D'Alessandro, Billy Edwards, John Gamaunt, Qian Gong, John Hartley, Kyle Helson, Logan Jensen, Daniel Kelly, Kanchita Klangboonkrong, Annalies Kleyheeg, Nikole Lewis, Steven Li, Michael Line, Stephen Maher, Ryan McClelland, Laddawan Miko, Lorenzo Mugnai, Peter Nagler, C. Barth Netterfield, Vivien Parmentier, Enzo Pascale, Jennifer Patience, Javier Romualdez, Subhajit Sarkar, Paul Scowen, Gregory Tucker, Augustyn Waczynski, Ingo Waldmann

Proceedings Volume 12184, 121842I (2022) https://doi.org/10.1117/12.2629588

KEYWORDS: Cryocoolers, Cryogenics, Receivers, Telescopes, Spectroscopy, Exoplanets

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Proceedings Article | 24 August 2021 Presentation + Paper

Presentation + Paper

Development of a thermal vacuum chamber, performance tests plan, and contamination control procedures for the Star-Planet Activity Research CubeSat (SPARCS)

Logan Jensen, Johnathan Gamaunt, Paul Scowen, Jim Austin, Matthew Beasley, Evgenya Shkolnik

Proceedings Volume 11820, 118200D (2021) https://doi.org/10.1117/12.2594894

KEYWORDS: Ultraviolet radiation, Contamination, Sensors, Stars, Telescopes, Mirrors, Particles, Monochromators, Space operations, Contamination control

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The Star-Planet Activity Research CubeSat (SPARCS) is positioned to revolutionize our understanding of M-dwarf star evolution, activity, variability, and the habitability of surrounding exoplanets. SPARCS will be the first mission to observe M stars for long periods of time simultaneously using a dual channel FUV (153 – 171 nm) and NUV (260 - 300 nm) imaging system. Anticipated to launch in 2023, SPARCS will provide key UV context to future observations by TESS and JWST, and the spaceflight application of advanced new detector technologies will pave the way for their implementation into future missions like LUVOIR and HabEx. To realize the scientific potential of SPARCS against the challenges of the ultraviolet spectrum, we are developing the specialized facilities, procedures, and tests necessary to assemble, integrate, and test the SPARCS science payload and spacecraft. A thorough testing campaign will verify the performance of individual payload components and obtain calibration baselines from the fully assembled science instrument that are vital to the data reduction process and in-flight contamination monitoring. SPARCS requires extensive contamination control to maintain its sensitivity in the FUV and NUV, which means all of AIT must occur in controlled and precisely monitored environments. This work will result in: (1) The delivery of the assembled and tested SPARCS spacecraft for launch in 2023. (2) A comprehensive performance validation and calibration baseline for SPARCS including a measurement of system throughput to for every wavelength across the SPARCS bandpasses, maps of NUV and FUV sensitivity across the payload field of view, and a full set of calibration products like flatfield images and dark current measurements for data reduction and comparison with calibration products acquired in orbit to monitor spacecraft conditions. (3) The establishment of a fully operational CubeSat AIT laboratory at ASU equipped to handle CubeSats up to 6U in size requiring meticulous contamination control up to the levels required for working in the FUV. This paper presents the work completed so far on the development and early operation of assembly, integration, and testing facilities for SPARCS. A custom thermal vacuum (TVAC) chamber facility was created and one of Arizona State University’s cleanroom environments was retrofitted to accommodate a 6U ultraviolet CubeSat requiring strict contamination control. We will describe the TVAC facility design and early testing, the cleanroom operation and contamination monitoring, and the development of an optical system and procedures to characterize the optical performance.

Proceedings Article | 20 August 2021 Poster + Presentation + Paper

Poster + Presentation + Paper

Star-Planet Activity Research CubeSat (SPARCS) test tank thermal methods

Johnathan Gamaunt, Logan Jensen, Paul Scowen, Jim Austin, David Ardilla, Evgenya Shkolnik

Proceedings Volume 11819, 118190M (2021) https://doi.org/10.1117/12.2594804

KEYWORDS: Thermal modeling, Data modeling, Contamination, Space operations, Cooling systems, Systems modeling

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Proceedings Article | 16 December 2020 Presentation + Paper

Presentation + Paper

SPARCS payload assembly, integration, and test update

Paul Scowen, David Ardila, Logan Jensen, Johnathan Gamaunt, Shouleh Nikzad, April Jewell, Jim Austin, Matthew Beasley, Evgenya Shkolnik, Travis Barman, Judd Bowman, Varoujan Gorjian, Dawn Gregory, Daniel Jacobs, Joe Llama, Mary Knapp, Victoria Meadows, Sarah Peacock, Tahina Ramiaramanantsoa, Mark Swain, Peter Vedder, Lisa Whelan, Robert Zellem

Proceedings Volume 11444, 114440A (2020) https://doi.org/10.1117/12.2562582

KEYWORDS: Stars, Near ultraviolet, Custom fabrication, Optical fabrication, Integrated optics, Calibration, Light sources, Contamination control, Telescopes, Staring arrays

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Showing 5 of 15 publications

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