Mr. Gerald Cabak Profile

Gerald Cabak

Senior Development Engineer at Lick Observatory

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Author

Publications (20)

Proceedings Article | 26 August 2024 Poster + Paper

Design of a precision cryogenic rotary stage for optic or mask selection for the SCALES instrument mounted to the Keck 2 Telescope

C. Ratliff, N. MacDonald, J. Cabak, W. Deich, D. Sandford, M. Gonzales, A. Skemer, S. Sallum, D. Stelter, A. Hunter, R. Kupke, D. Dillon, D. Marques, C. Rodriguez, M. Savage, M. Kassis, J. Lyke, A. Hasan

Proceedings Volume 13100, 131006X (2024) https://doi.org/10.1117/12.3020421

KEYWORDS: Design, Mirrors, Optical surfaces, Cryogenics, Aluminum, Mirror surfaces, Telescopes, Equipment, Finite element methods, Vacuum

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Proceedings Article | 19 July 2024 Poster

Cryogenic test results of first SCALES rotary stage

Michael Gonzales, Deno Stelter, Christopher Ratliff, Dale Sandford, William Deich, Aaron Hunter, Nicholas MacDonald, Gerald Cabak, David Black, Andrew Skemer

Proceedings Volume 13096, 130966Z (2024) https://doi.org/10.1117/12.3020851

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Proceedings Article | 18 July 2024 Presentation + Paper

SCALES status report

R. Deno Stelter, Andrew Skemer, Stephanie Sallum, Nick MacDonald, Renate Kupke, Christopher Ratliff, Cyril Bourgenot, Gerald Cabak, Michael Gonzales, Cristian Rodriguez, Aaron Hunter, Ravinder Banyal, Thirupathi Sivarani, Michael Fitzgerald, Marc Kassis, Olivier Absil, Carlos Alvarez, Natatsha Batalha, Marc-André Boucher, Timothy Brandt, Zack Briesemeister, Katherine de Kleer, Imke de Pater, William Deich, Devika Dicakar, Étienne Gauvin, Thomas Greene, Armirul Hasan, Philip Hinz, Rebecca Jensen-Clem, Christopher Johnson, Govinda K. V., Isabel Kain, Mackenzie Lach, Jean-Thomas Landry, Michael Liu, Jim Lyke, Kenneth Magone, Eduardo Marin, Raquel Martinez, Dimitri Mawet, Rosalie McGurk, Brittany Miles, Ajin Parkash, Dale Sandford, Ramya Sethuram, Patrick Sheehan, Ji Man Sohn, Jordan Stone, Arun Surya, Hari Varshney, Eric Wang

Proceedings Volume 13096, 1309619 (2024) https://doi.org/10.1117/12.3020806

KEYWORDS: Mirrors, Cryostats, Coronagraphy, Spectrographs, Telescopes, Imaging systems, Exoplanets

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Proceedings Article | 29 August 2022 Presentation + Paper

Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. II

Marc Kassis, Steve Allen, Carlos Alvarez, Ravinder Banyal, Robert Bertz, Charles Beichman, Aaron Brown, Matthew Brown, Gerald Cabak, Kevin Bundy, Sylvain Cetre, Jason Chin, Mark Chun, Will Deich, Richard Dekany, Jacques Delorme, Mark Devenot, Greg Doppmann, Michael Fitzgerald, Jason Fucik, Grant Hill, Philip Hinz, Bradford Holden, Andrew Howard, Maodong Gao, Steve Gibson, Percy Gomez, Colby Gottschalk, Peter Gillingham, Tucker Jones, Nemanja Jovanovic, Evan Kirby, Quinn Konopacky, Shanti Krishnan, Renate Kupke, James Larkin, Stephanie Leifer, Hilton Lewis, Scott Lilley, Jessica Lu, James Lyke, Nick MacDonald, Eduardo Marin, Matt Matuszewski, Dimitri Mawet, Rosalie McGurk, Maxwell Millar-Blanchaer, Reston Nash, Craig Nance, James Neill, John O'Meara, Eliad Peretz, Claire Poppett, John Mather, Matthew Radovan, Mitsuko Roberts, Sam Ragland, Kodi Rider, Constance Rockosi, Dale Sandfor, Boqiang Shen, Charles Steidel, Sunil Simha, Andy Skemer, Deno Stelter, Avinash Surendran, James Thorne, Ben McCarney, Kyle Lanclos, Ashley Baker, Ryan Rubenzahl, Arpita Roy, Sam Halverson, Jerry Edelstein, Christopher Martin, Maureen Savage, Dale Sandford, Stephanie Sallum, Josh Walawender, Peter Wizinowich, Kyle Westfall, Kerry Vahala, Shelley Wright, Truman Wold, Sherry Yeh

Proceedings Volume 12184, 1218405 (2022) https://doi.org/10.1117/12.2628630

KEYWORDS: Adaptive optics, Spectrographs, Exoplanets, Sensors, Spectroscopy, Imaging systems, Telescopes, Planets, Cameras, Observatories

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Proceedings Article | 10 July 2018 Presentation + Paper

Fabrication completion and commissioning of a deployable tertiary mirror for the Keck I Telescope

C. Ratliff, G. Cabak, A. Phillips, X. Prochaska, W. Deich, D. Sandford, J. Nelson, D. Cowley, A. Tripsas, M. Bolte, S. Park, M. Peck, P. Zachary, T. Wold, M. Dahler, M. Kassis, A. Vandenberg, J. Ward

Proceedings Volume 10706, 1070611 (2018) https://doi.org/10.1117/12.2312207

KEYWORDS: Mirrors, Telescopes, Kinematics, Actuators, Computer aided design, Adaptive optics, Control systems, Collimation, Servomechanisms, Computer programming

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Proceedings Article | 9 August 2016 Paper

Blue camera of the Keck cosmic web imager, fabrication and testing

Constance Rockosi, David Cowley, Jerry Cabak, David Hilyard, Terry Pfister

Proceedings Volume 9908, 990854 (2016) https://doi.org/10.1117/12.2233614

KEYWORDS: Cameras, Imaging systems, Keck Observatory, Optical fabrication, Optical design, Observatories, Tolerancing, Optical testing, Optical components, Lens design

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The Keck Cosmic Web Imager (KCWI) is a new facility instrument being developed for the W. M. Keck Observatory and funded for construction by the Telescope System Instrumentation Program (TSIP) of the National Science Foundation (NSF). KCWI is a bench-mounted spectrograph for the Keck II right Nasmyth focal station, providing integral field spectroscopy over a seeing-limited field up to 20" x 33" in extent. Selectable Volume Phase Holographic (VPH) gratings provide high efficiency and spectral resolution in the range of 1000 to 20000. The dual-beam design of KCWI passed a Preliminary Design Review in summer 2011. The detailed design of the KCWI blue channel (350 to 700 nm) is now nearly complete, with the red channel (530 to 1050 nm) planned for a phased implementation contingent upon additional funding. KCWI builds on the experience of the Caltech team in implementing the Cosmic Web Imager (CWI), in operation since 2009 at Palomar Observatory. KCWI adds considerable flexibility to the CWI design, and will take full advantage of the excellent seeing and dark sky above Mauna Kea with a selectable nod-and-shuffle observing mode. In this paper, models of the expected KCWI sensitivity and background subtraction capability are presented, along with a detailed description of the instrument design. The KCWI team is lead by Caltech (project management, design and implementation) in partnership with the University of California at Santa Cruz (camera optical and mechanical design) and the W. M. Keck Observatory (program oversight and observatory interfaces). The optical design of the blue camera for the Keck Cosmic Web Imager (KCWI) by Harland Epps of the University of California, Santa Cruz is a lens assembly consisting of eight spherical optical elements. Half the elements are calcium fluoride and all elements are air spaced. The design of the camera barrel is unique in that all the optics are secured in their respective cells with an RTV annulus without additional hardware such as retaining rings. The optical design and the robust lens mounting concept has allowed UCO/Lick to design a straightforward lens camera assembly. However, alignment sensitivity is a strict 15 μm for most elements. This drives the fabrication, assembly, and performance of the camera barrel.

Proceedings Article | 15 July 2016 Paper

Detailed design of a deployable tertiary mirror for the Keck I telescope

J. Xavier Prochaska, Chris Ratliff, Jerry Cabak, Alex Tripsas, Sean Adkins, Michael Bolte, David Cowley, Mike Dahler, Will Deich, Hilton Lewis, Jerry Nelson, Sam Park, Michael Peck, Drew Phillips, Mike Pollard, Bill Randolph, Dale Sandford, Jim Ward, Truman Wold

Proceedings Volume 9910, 99102I (2016) https://doi.org/10.1117/12.2233237

KEYWORDS: Mirrors, Telescopes, Astronomy, Calibration, Sensors, Distortion, Data modeling, Spectroscopy, James Webb Space Telescope, Magnetic resonance imaging

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Proceedings Article | 7 August 2014 Paper

Swimming with ShARCS: comparison of on-sky sensitivity with model predictions for ShaneAO on the Lick Observatory 3-meter telescope

Srikar Srinath, Rosalie McGurk, Constance Rockosi, Renate Kupke, Donald Gavel, Gerald Cabak, David Cowley, Michael Peck, Christopher Ratliff, Elinor Gates, Daren Dillon, Andrew Norton, Marc Reining

Proceedings Volume 9148, 91482Z (2014) https://doi.org/10.1117/12.2055672

KEYWORDS: Telescopes, Adaptive optics, Observatories, Signal to noise ratio, Sensors, Imaging systems, Infrared cameras, Mirrors, Photons, Stars

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Proceedings Article | 22 July 2014 Paper

Design development of a deployable tertiary mirror for Keck

J. Prochaska, J. Cabak, C. Ratliff, S. Adkins, M. Bolte, D. Cowley, H. Epps, J. Nelson, A. Tripsas, A. Phillips, W. Deich, M. Peck

Proceedings Volume 9145, 91453X (2014) https://doi.org/10.1117/12.2055275

KEYWORDS: Mirrors, Telescopes, Kinematics, Observatories, Stars, Adaptive optics, Vignetting, Actuators, Astronomy, Spectrometers

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Proceedings Article | 21 July 2014 Paper

ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory

Donald Gavel, Renate Kupke, Daren Dillon, Andrew Norton, Chris Ratliff, Jerry Cabak, Andrew Phillips, Connie Rockosi, Rosalie McGurk, Srikar Srinath, Michael Peck, William Deich, Kyle Lanclos, John Gates, Michael Saylor, Jim Ward, Terry Pfister

Proceedings Volume 9148, 914805 (2014) https://doi.org/10.1117/12.2055256

KEYWORDS: Adaptive optics, Stars, Wavefront sensors, Sensors, Electroluminescent displays, Point spread functions, Imaging systems, Telescopes, Cameras, Observatories

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Proceedings Article | 21 July 2014 Paper

Opto-mechanical design of ShaneAO: the adaptive optics system for the 3-meter Shane Telescope

C. Ratliff, J. Cabak, D. Gavel, R. Kupke, D. Dillon, E. Gates, W. Deich, J. Ward, D. Cowley, T. Pfister, M. Saylor

Proceedings Volume 9148, 91483B (2014) https://doi.org/10.1117/12.2057064

KEYWORDS: Adaptive optics, Telescopes, Microelectromechanical systems, Cameras, Aluminum, Wavefront sensors, Optical benches, Optomechanical design, Mirrors, Deformable mirrors

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Proceedings Article | 25 September 2012 Paper

Thermo-structural analysis of stresses during fabrication of an optical element for the APF camera

Gerald Cabak, David Hilyard

Proceedings Volume 8449, 84491M (2012) https://doi.org/10.1117/12.924376

KEYWORDS: Glasses, Silica, Finite element methods, Cameras, Optical components, Zerodur, Thermal modeling, Failure analysis, Observatories, Planets

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Proceedings Article | 24 September 2012 Paper

Mechanical design and integration of the support structure for the Reionization And Transients InfRared Instrument RATIR

Alejandro Farah, J. Jesús González, Alexander Kutyrev, Gennadiy Lotkin, Alan Watson, Nathaniel Butler, William Lee, Michael Richer, Eduardo López, David Clark, Gerald Cabak, Ori Fox, David Rapchun, Carlos Román-Zúñiga, Leonid Georgiev

Proceedings Volume 8446, 84469O (2012) https://doi.org/10.1117/12.927040

KEYWORDS: Computer aided design, Solid modeling, Telescopes, Mechanical engineering, Infrared radiation, Optics manufacturing, Optomechanical components, Sensors, Infrared cameras, Space telescopes

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Proceedings Article | 24 September 2012 Paper

The Keck Cosmic Web Imager: a capable new integral field spectrograph for the W. M. Keck Observatory

Patrick Morrissey, Mateusz Matuszewski, Chris Martin, Anna Moore, Sean Adkins, Harland Epps, Randy Bartos, Jerry Cabak, Dave Cowley, Jack Davis, Alex Delacroix, Jason Fucik, David Hilliard, Ean James, Steve Kaye, Nicole Lingner, James D. Neill, Christoph Pistor, Drew Phillips, Connie Rockosi, Bob Weber

Proceedings Volume 8446, 844613 (2012) https://doi.org/10.1117/12.924729

KEYWORDS: Telescopes, Cameras, Mirrors, Spectrographs, Keck Observatory, Observatories, Imaging systems, Spectral resolution, Sensors, Charge-coupled devices

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Proceedings Article | 24 September 2012 Paper

Buckling failure of the automated planet finder spectrometer determinate spaceframe

Matthew Radovan, Gerald Cabak

Proceedings Volume 8446, 84468A (2012) https://doi.org/10.1117/12.926619

KEYWORDS: Telescopes, Finite element methods, Computer aided design, Foam, Spectroscopy, Aluminum, Failure analysis, Space telescopes, Earthquakes, Planets

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Proceedings Article | 17 September 2012 Paper

Keck 1 deployable tertiary mirror (K1DM3)

J. Xavier Prochaska, Christoph Pistor, Gerald Cabak, David Cowley, Jerry Nelson

Proceedings Volume 8444, 84444R (2012) https://doi.org/10.1117/12.926582

KEYWORDS: Mirrors, Telescopes, Stars, Space telescopes, Spectroscopy, Galactic astronomy, Spectrometers, Spectrographs, Observatories, Astronomy

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Proceedings Article | 13 September 2012 Paper

ShaneAO: an enhanced adaptive optics and IR imaging system for the Lick Observatory 3-meter telescope

Renate Kupke, Donald Gavel, Constance Roskosi, Gerald Cabak, David Cowley, Daren Dillon, Elinor Gates, Rosalie McGurk, Andrew Norton, Michael Peck, Christopher Ratliff, Marco Reinig

Proceedings Volume 8447, 84473G (2012) https://doi.org/10.1117/12.926470

KEYWORDS: Adaptive optics, Telescopes, Laser guide stars, Deformable mirrors, Wavefront sensors, Sensors, Cameras, Observatories, Mirrors, Imaging systems

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Proceedings Article | 20 July 2010 Paper

A radial velocity spectrometer for the Automated Planet Finder Telescope at Lick Observatory

Matthew Radovan, Gerald Cabak, Lee Laiterman, Christopher Lockwood, Steven Vogt

Proceedings Volume 7735, 77354K (2010) https://doi.org/10.1117/12.857726

KEYWORDS: Telescopes, Spectroscopy, Cameras, Prisms, Space telescopes, Charge-coupled devices, Planets, Observatories, Optical components, Finite element methods

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Proceedings Article | 20 July 2010 Paper

Experimental investigation of adhesive bond strength between metal and optical glass

Lee Laiterman, Matthew Radovan, Gerald Cabak

Proceedings Volume 7735, 773542 (2010) https://doi.org/10.1117/12.857775

KEYWORDS: Adhesives, Epoxies, Glasses, Metals, Spectrometers, Space telescopes, Telescopes, Observatories, Prisms, Reliability

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Proceedings Article | 15 July 2010 Paper

The low-resolution imaging spectrograph red channel CCD upgrade: fully depleted, high-resistivity CCDs for Keck

C. Rockosi, R. Stover, R. Kibrick, C. Lockwood, M. Peck, D. Cowley, M. Bolte, S. Adkins, B. Alcott, S. Allen, B. Brown, G. Cabak, W, Deich, D, Hilyard, M, Kassis, K, Lanclos, J, Lewis, T, Pfister, A, Phillips, L, Robinson, M, Saylor, M, Thompson, J, Ward, M, Wei, C, Wright

Proceedings Volume 7735, 77350R (2010) https://doi.org/10.1117/12.856818

KEYWORDS: Charge-coupled devices, Spectrographs, Sensors, Astronomy, Current controlled current source, CCD image sensors, Image resolution, Telescopes, Observatories, Sensor performance

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