Dr. Christopher R. Raum Profile

Dr. Christopher R. Raum

R&D Engineer at Univ of California Berkeley

SPIE Involvement:

Author

Publications (25)

Proceedings Article | 10 September 2024 Presentation + Paper

Presentation + Paper

The LiteBIRD mission to explore cosmic inflation

T. Ghigna, A. Adler, K. Aizawa, H. Akamatsu, R. Akizawa, E. Allys, A. Anand, J. Aumont, J. Austermann, S. Azzoni, C. Baccigalupi, M. Ballardini, A. Banday, R. Barreiro, N. Bartolo, S. Basak, A. Basyrov, S. Beckman, M. Bersanelli, M. Bortolami, F. Bouchet, T. Brinckmann, P. Campeti, E. Carinos, A. Carones, F. Casas, K. Cheung, Y. Chinone, L. Clermont, F. Columbro, A. Coppolecchia, D. Curtis, P. de Bernardis, T. de Haan, E. de la Hoz, M. De Petris, S. Della Torre, G. Delle Monache, E. Di Giorgi, C. Dickinson, P. Diego-Palazuelos, J. Díaz García, M. Dobbs, T. Dotani, H. Eriksen, J. Errard, T. Essinger-Hileman, N. Farias, E. Ferreira, C. Franceschet, U. Fuskeland, G. Galloni, M. Galloway, K. Ganga, M. Gerbino, M. Gervasi, R. Génova-Santos, S. Giardiello, C. Gimeno-Amo, E. Gjerløw, R. González González, L. Grandsire, A. Gruppuso, N. Halverson, P. Hargrave, S. Harper, M. Hazumi, S. Henrot-Versillé, L. Hergt, D. Herranz, E. Hivon, R. Hlozek, T. Hoang, J. Hubmayr, K. Ichiki, K. Ikuma, H. Ishino, G. Jaehnig, B. Jost, K. Kohri, K. Konishi, L. Lamagna, M. Lattanzi, C. Leloup, F. Levrier, A. Lanoppan, G. Luzzi, J. Macias-Perez, B. Maffei, E. Marchitelli, E. Martínez-González, S. Masi, S. Matarrese, T. Matsumura, S. Micheli, M. Migliaccio, M. Monelli, L. Montier, G. Morgante, L. Mousset, Y. Nagano, R. Nagata, P. Natoli, A. Novelli, F. Noviello, I. Obata, A. Occhiuzzi, K. Odagiri, R. Omae, L. Pagano, A. Paiella, D. Paoletti, G. Pascual-Cisneros, G. Patanchon, V. Pavlidou, F. Piacentini, M. Piat, G. Piccirilli, M. Pinchera, G. Pisano, L. Porcelli, N. Raffuzzi, C. Raum, M. Remazeilles, A. Ritacco, J. Rubino-Martin, M. Ruiz-Granda, Y. Sakurai, G. Savini, D. Scott, Y. Sekimoto, M. Shiraishi, G. Signorelli, S. Stever, R. Sullivan, A. Suzuki, R. Takaku, H. Takakura, S. Takakura, Y. Takase, A. Tartari, K. Tassis, K. Thompson, M. Tomasi, M. Tristram, C. Tucker, L. Vacher, B. van Tent, P. Vielva, K. Watanuki, I. Wehus, B. Westbrook, G. Weymann-Despres, B. Winter, E. Wollack, A. Zacchei, M. Zannoni, Y. Zhou

Proceedings Volume 13092, 1309228 (2024) https://doi.org/10.1117/12.3021377

KEYWORDS: Telescopes, Physics, Polarization, Design, Sensors, Cosmology, Satellites, Astronomy

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Proceedings Article | 24 August 2024 Poster

Poster

Fabrication of low frequency detector arrays with integrated cosmic ray mitigation structures for the LiteBIRD CMB experiment

Christopher Raum, Shawn Beckman, Nicole Farias, Tommaso Ghigna, Nils Halverson, Masashi Hazumi, Johannes Hubmayr, Greg Jaehnig, Adrian Lee, Samantha Stever, Aritoki Suzuki, Keith Thompson, Ben Westbrook

Proceedings Volume 13092, 1309275 (2024) https://doi.org/10.1117/12.3018488

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Proceedings Article | 16 August 2024 Poster + Paper

Poster + Paper

Development of the low-frequency telescope focal plane detector arrays for LiteBIRD

Tommaso Ghigna, Aritoki Suzuki, Benjamin Westbrook, Christopher Raum, Hiroki Akamatsu, Shawn Beckman, Nicole Farias, Tijmen de Haan, Nils Halverson, Masashi Hazumi, Johannes Hubmayr, Greg Jaehnig, Adrian Lee, Samantha Stever, Yu Zhou

Proceedings Volume 13102, 131020Y (2024) https://doi.org/10.1117/12.3019287

KEYWORDS: Antennas, Bandpass filters, Telescopes, Bolometers

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Proceedings Article | 16 August 2024 Poster + Paper

Poster + Paper

The Simons Observatory: design, fabrication, and characterization of low-frequency detectors

Bhoomija Prasad, Benjamin Westbrook, Shawn Beckman, Aashrita Mangu, Christopher Raum, Adrian Lee, Aritoki Suzuki, Daniel Dutcher, Kaiwen Zheng, Susanne Staggs, Bradley Johnson, Yuhan Wang

Proceedings Volume 13102, 131020X (2024) https://doi.org/10.1117/12.3020813

KEYWORDS: Semiconducting wafers, Etching, Sensors, Niobium, Fabrication, Bolometers, Photography, Optical alignment, Design, Detector arrays

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

LiteBIRD low- and mid-frequency detectors: design and status

G. Jaehnig, K. Arnold, J. Austermann, J. Beall, D. Becker, J. Connors, S. Duff, N. Halverson, M. Hazumi, G. Hilton, J. Hubmayr, C. L. Kuo, A. Lee, M. Link, C. Raum, S. Stevenson, A. Suzuki, K. Thompson, J. Van Lanen, M. Vissers, S. Walker, B. Westbrook

Proceedings Volume 12190, 121900T (2022) https://doi.org/10.1117/12.2630393

KEYWORDS: Sensors, Bolometers, Telescopes, Antennas, Bandpass filters, Polarization, Optical testing, Detector arrays, Resistors, Temperature metrology

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

Testing magnetic interference between TES detectors and the telescope environment for future CMB satellite missions

Tommaso Ghigna, Thuong Hoang, Takashi Hasebe, Yurika Hoshino, Nobuhiko Katayama, Kunimoto Komatsu, Adrian Lee, Tomotake Matsumura, Yuki Sakurai, Shinya Sugiyama, Aritoki Suzuki, Christopher Raum, Ryota Takaku, Benjamin Westbrook

Proceedings Volume 12190, 121902N (2022) https://doi.org/10.1117/12.2630091

KEYWORDS: Sensors, Telescopes, Polarization, Satellites, Bolometers

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Proceedings Article | 31 August 2022 Presentation + Paper

Presentation + Paper

Development of the low frequency telescope focal plane detector modules for LiteBIRD

B. Westbrook, C. Raum, S. Beckman, A. Lee, N. Farias, A. Bogdan, A. Hornsby, A. Suzuki, K. Rotermund, T. Elleflot, J. Austerman, J. Beall, S. Duff, J. Hubmayr, M. Vissers, M. Link, G. Jaehnig, N. Halverson, T. Ghigna, M. Hazumi, S. Stever, Y. Minami, K. Thompson, M. Russell, K. Arnold, M. Silva-Feaver

Proceedings Volume 12190, 121900I (2022) https://doi.org/10.1117/12.2630574

KEYWORDS: Semiconducting wafers, Bolometers, Palladium, Mars, Silicon, Telescopes, Sensors, Antennas, Photography, Computer aided design

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

On-site detector noise characterization of the POLARBEAR-2A receiver

Nicole Farias, Megan Russell, Daisuke Kaneko, Sayuri Takatori, Adrian Lee, Kam Arnold, Tylor Adkins, Darcy Barron, Kevin Crowley, Tucker Elleflot, Takuro Fujino, Masaya Hasegawa, Jennifer Ito, Lindsay Lowry, Yume Nishinomiya, Christopher Raum, Praween Siritanasak, Benjamin Westbrook, Kyohei Yamada

Proceedings Volume 12190, 121901U (2022) https://doi.org/10.1117/12.2627513

KEYWORDS: Sensors, Bolometers, Temperature metrology, Signal detection, Telescopes, Superconductors

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Proceedings Article | 21 December 2020 Presentation + Paper

Presentation + Paper

LiteBIRD satellite: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization

M. Hazumi, P.A.R. Ade, A. Adler, E. Allys, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, C. Baccigalupi, A. Banday, R. Banjeri, R. Barreiro, S. Basak, J. Beall, D. Beck, S. Beckman, J. Bermejo, P. de Bernardis, M. Bersanelli, J. Bonis, J. Borrill, F. Boulanger, S. Bounissou, M. Brilenkov, M. Brown, M. Bucher, E. Calabrese, P. Campeti, A. Carones, F. Casas, A. Challinor, V. Chan, K. Cheung, Y. Chinone, J. Cliche, L. Colombo, F. Columbro, J. Cubas, A. Cukierman, D. Curtis, G. D'Alessandro, N. Dachlythra, M. De Petris, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, L. Duband, S. Duff, J. Duval, K. Ebisawa, T. Elleflot, H. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, M. Galloway, K. Ganga, J. Gao, R. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, E. Gjerløw, M. Gradziel, J. Grain, F. Grupp, A. Gruppuso, J. Gudmundsson, T. de Haan, N. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, S. Henrot-Versillé, D. Herman, D. Herranz, C. Hill, G. Hilton, Y. Hirota, E. Hivon, R. Hlozek, Y. Hoshino, E. de la Hoz, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. L. Kuo, A. Kushino, L. Lamagna, J. Lanen, M. Lattanzi, A. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, T. Maciaszek, B. Maffei, D. Maino, M. Maki, S. Mandelli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, J. Montgomery, L. Montier, G. Morgante, B. Mot, Y. Murata, J. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, F. Noviello, C. O'Sullivan, H. Ogawa, S. Oguri, H. Ohsaki, I. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, J. Peloton, F. Piacentini, G. Pisano, G. Polenta, D. Poletti, T. Prouvé, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. Rubino-Martin, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, G. Savini, D. Scott, J. Seibert, Y. Sekimoto, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, S. Stever, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, T. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, E. Taylor, Y. Terao, H. Thommesen, K. Thompson, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, J. Ullom, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, I. Wehus, J. Weller, B. Westbrook, J. Wilms, B. Winter, E. Wollack, N. Yamasaki, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca

Proceedings Volume 11443, 114432F (2020) https://doi.org/10.1117/12.2563050

KEYWORDS: Polarization, Satellites, Microwave radiation, Telescopes, Algorithm development, Refractor telescopes, Rockets, Quantum physics, Astrophysics, Spatial resolution

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Proceedings Article | 16 December 2020 Presentation + Paper

Presentation + Paper

Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

Y. Sekimoto, P. A. Ade, A. Adler, E. Allys, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, C. Baccigalupi, A. Banday, R. Banerji, R. Barreiro, S. Basak, J. Beall, D. Beck, S. Beckman, J. Bermejo, P. de Bernardis, M. Bersanelli, J. Bonis, J. Borrill, F. Boulanger, S. Bounissou, M. Brilenkov, M. Brown, M. Bucher, E. Calabrese, P. Campeti, A. Carones, F. Casas, A. Challinor, V. Chan, K. Cheung, Y. Chinone, J. F. Cliche, L. Colombo, F. Columbro, J. Cubas, A. Cukierman, D. Curtis, G. D'Alessandro, N. Dachlythra, M. De Petris, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, L. Duband, S. Duff, J. M. Duval, K. Ebisawa, T. Elleflot, H. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, M. Galloway, K. Ganga, J. R. Gao, R. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, E. Gjerløw, M. Gradziel, J. Grain, F. Grupp, A. Gruppuso, J. Gudmundsson, T. de Haan, N. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versillé, D. Herman, D. Herranz, C. Hill, G. Hilton, Y. Hirota, E. Hivon, R. Hlozek, Y. Hoshino, E. de la Hoz, J. Hubmayr, K. Ichiki, T. iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. L. Kuo, A. Kushino, L. Lamagna, J. Lanen, M. Lattanzi, A. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, T. Maciaszek, B. Maffei, D. Maino, M. Maki, S. Mandelli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minanmi, K. Mitsuda, J. Montgomery, L. Montier, G. Morgante, B. Mot, Y. Murata, J. A. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, C. O'Sullivan, H. Ogawa, S. Oguri, H. Ohsaki, I. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, J. Peloton, F. Piacentini, G. Pisano, G. Polenta, D. Poletti, T. Prouvé, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. A. Rubino-Martin, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, G. Savini, D. Scott, J. Seibert, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, S. Stever, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, T. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, E. Taylor, Y. Terao, H. Thommesen, K. Thompson, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, J. Ullom, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, I. Wehus, J. Weller, B. Westbrook, J. Wilms, B. Winter, E. Wollack, N. Yamasaki, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca

Proceedings Volume 11453, 1145310 (2020) https://doi.org/10.1117/12.2561841

KEYWORDS: Telescopes, Polarization, Optical instrument design, Satellites, Stray light, Antennas, Reflectors, Microwave radiation, Spatial resolution, Diffraction

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Proceedings Article | 15 December 2020 Poster + Paper

Poster + Paper

Detector fabrication development for the LiteBIRD satellite mission

B. Westbrook, C. Raum, S. Beckman, A. Lee, N. Farias, T. Sasse, A. Suzuki, E. Kane, J. E. Austermann, J. A. Beall, S. Duff, J. Hubmayr, G. Hilton, J. Van Lanen, M. Vissers, M. Link, N. Halverson, G. Jaehnig, T. Ghinga, S. Stever, Y. Minami, K. L. Thompson, M. Russell, K. Arnold, J. Seibert, M. Silva-Feaver

Proceedings Volume 11443, 114435Q (2020) https://doi.org/10.1117/12.2562978

KEYWORDS: Sensors, Detector development, Satellites, Polarization, Microwave radiation, Optical telescopes, Antennas

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Proceedings Article | 15 December 2020 Presentation + Paper

Presentation + Paper

Overview of the medium and high frequency telescopes of the LiteBIRD space mission

L. Montier, B. Mot, P. de Bernardis, B. Maffei, G. Pisano, F. Columbro, J. Gudmundsson, S. Henrot-Versillé, L. Lamagna, J. Montgomery, T. Prouvé, M. Russell, G. Savini, S. Stever, K. Thompson, M. Tsujimoto, C. Tucker, B. Westbrook, P. A. R. Ade, A. Adler, E. Allys, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, C. Baccigalupi, A. Banday, R. Banerji, R. Barreiro, S. Basak, J. Beall, D. Beck, S. Beckman, J. Bermejo, M. Bersanelli, J. Bonis, J. Borrill, F. Boulanger, S. Bounissou, M. Brilenkov, M. Brown, M. Bucher, E. Calabrese, P. Campeti, A. Carones, F. Casas, A. Challinor, V. Chan, K. Cheung, Y. Chinone, J. Cliche, L. Colombo, J. Cubas, A. Cukierman, D. Curtis, G. D'Alessandro, N. Dachlythra, M. De Petris, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, L. Duband, S. Duff, J. Duval, K. Ebisawa, T. Elleflot, H. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, M. Galloway, K. Ganga, J. Gao, R. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, E. Gjerløw, M. Gradziel, J. Grain, F. Grupp, A. Gruppuso, T. de Haan, N. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, D. Herman, D. Herranz, C. Hill, G. Hilton, Y. Hirota, E. Hivon, R. Hlozek, Y. Hoshino, E. de la Hoz, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I. Kreykenbohm, C. Kuo, A. Kushino, J. Lanen, M. Lattanzi, A. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, T. Maciaszek, D. Maino, M. Maki, S. Mandelli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, G. Morgante, Y. Murata, J. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, C. O'Sullivan, H. Ogawa, S. Oguri, H. Ohsaki, I. Ohta, N. Okada, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, J. Peloton, F. Piacentini, G. Polenta, D. Poletti, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. Rubino-Martin, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, D. Scott, J. Seibert, Y. Sekimoto, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, T. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, E. Taylor, Y. Terao, H. Thommesen, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, J. Ullom, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, I. Wehus, J. Weller, J. Wilms, B. Winter, E. Wollack, N. Yamasaki, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca

Proceedings Volume 11443, 114432G (2020) https://doi.org/10.1117/12.2562243

KEYWORDS: Telescopes, Space operations, Refractor telescopes, Sensors, Microwave radiation, Polarization, Cryogenics, Wave plates, Optical components, Lenses

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Proceedings Article | 13 December 2020 Poster

Poster

Recent developments and optimization of commercially fabricated antenna-coupled transition edge sensor bolometer detectors for next generation cosmic microwave background polarimetry experiments

Aritoki Suzuki, Jason Stevens, Daniel Yohannes, Patrick Truitt, Michael Niemack, Eve Vavagiakis, Akito Kusaka, Yume Nishinomiya, Kenji Kiuchi, Logan Foote, Shawn Beckman, Adrian Lee, Ben Westbrook, Chris Raum, Trevor Sasse, John Vivalda, Mario Renzullo, Nicholas Cothard, Mayuri Sathyanarayana Rao

Proceedings Volume 11453, 1145324 (2020) https://doi.org/10.1117/12.2562378

KEYWORDS: Sensors, Polarimetry, Bolometers, Microwave radiation, Optical fabrication, Semiconducting wafers, Superconductors, Detector arrays, Wafer-level optics, Antennas

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

Detector and readout characterization for POLARBEAR-2b

J. Ito, L. Lowry, T. Elleflot, K. Crowley, L. Howe, P. Siritanasak, T. Adkins, K. Arnold, C. Baccigalupi, D. Barron, B. Bixler, Y. Chinone, J. Groh, M. Hazumi, C. Hill, O. Jeong, B. Keating, A. Kusaka, A. Lee, K. Mitchell, M. Navaroli, A. T. Pham, C. Raum, C. Reichardt, T. Sasse, J. Seibert, A. Suzuki, S. Takakura, G. Teply, C. Tsai, B. Westbrook

Proceedings Volume 11453, 1145320 (2020) https://doi.org/10.1117/12.2562766

KEYWORDS: Sensors, Bolometers, Multiplexing, Resonators, Telescopes, Polarization, Microwave radiation, Receivers, Silicon, Lenses

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Proceedings Article | 9 August 2018 Presentation + Paper

Presentation + Paper

Concept design of the LiteBIRD satellite for CMB B-mode polarization

Y. Sekimoto, P. Ade, K. Arnold, J. Aumont, J. Austermann, C. Baccigalupi, A. Banday, R. Banerji, S. Basak, S. Beckman, M. Bersanelli, J. Borrill, F. Boulanger, M. Brown, M. Bucher, E. Calabrese, A. Challinor, Y. Chinone, F. Columbro, A. Cukierman, D. Curtis, P. de Bernardis, M. de Petris, M. Dobbs, T. Dotani, L. Duband, A. Ducout, K. Ebisawa, T. Elleflot, H. Eriksen, J. Errard, R. Flauger, C. Franceschet, U. Fuskeland, K. Ganga, J.R. Gao, T. Ghigna, J. Grain, A. Gruppuso, N. Halverson, P. Hargrave, T. Hasebe, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versille, C. Hill, Y. Hirota, E. Hivon, D. T. Hoang, J. Hubmayr, K. Ichiki, H. Imada, H. Ishino, G. Jaehnig, H. Kanai, S. Kashima, Y. Kataoka, N. Katayama, T. Kawasaki, R. Keskitalo, A. Kibayashi, T. Kikuchi, K. Kimura, T. Kisner, Y. Kobayashi, N. Kogiso, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, C. L. Kuo, N. Kurinsky, A. Kushino, L. Lamagna, A. Lee, E. Linder, B. Maffei, M. Maki, A. Mangilli, E. Martinez-Gonzalez, S. Masi, T. Matsumura, A. Mennella, Y. Minami, K. Mistuda, D. Molinari, L. Montier, G. Morgante, B. Mot, Y. Murata, A. Murphy, M. Nagai, R. Nagata, S. Nakamura, T. Namikawa, P. Natoli, T. Nishibori, H. Nishino, F. Noviello, C. O'Sullivan, H. Ochi, H. Ogawa, H. Ohsaki, I. Ohta, N. Okada, G. Patanchon, F. Piacentini, G. Pisano, G. Polenta, D. Poletti, G. Puglisi, C. Raum, S. Realini, M. Remazeilles, H. Sakurai, Y. Sakurai, G. Savini, B. Sherwin, K. Shinozaki, M. Shiraishi, G. Signorelli, G. Smecher, R. Stompor, H. Sugai, S. Sugiyama, A. Suzuki, J. Suzuki, R. Takaku, H. Takakura, S. Takakura, E. Taylor, Y. Terao, K. Thompson, B. Thorne, M. Tomasi, H. Tomida, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, S. Uozumi, S. Utsunomiya, N. Vittorio, N. Watanabe, I. Wehus, B. Westbrook, B. Winter, R. Yamamoto, N. Yamasaki, M. Yanagisawa, T. Yoshida, J. Yumoto, M. Zannoni, A. Zonca

Proceedings Volume 10698, 106981Y (2018) https://doi.org/10.1117/12.2313432

KEYWORDS: Telescopes, Polarization, Space telescopes, Fermium, Frequency modulation, Cryogenics, Physics, Antennas, Mirrors, Satellites

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Proceedings Article | 31 July 2018 Presentation + Paper

Presentation + Paper

The Simons Observatory: instrument overview

Nicholas Galitzki, Aamir Ali, Kam Arnold, Peter Ashton, Jason Austermann, Carlo Baccigalupi, Taylor Baildon, Darcy Barron, James Beall, Shawn Beckman, Sarah Marie Bruno, Sean Bryan, Paolo Calisse, Grace Chesmore, Yuji Chinone, Steve Choi, Gabriele Coppi, Kevin Crowley, Ari Cukierman, Mark Devlin, Simon Dicker, Bradley Dober, Shannon Duff, Jo Dunkley, Giulio Fabbian, Patricio Gallardo, Martina Gerbino, Neil Goeckner-Wald, Joseph Golec, Jon Gudmundsson, Erin Healy, Shawn Henderson, Charles Hill, Gene Hilton, Shuay-Pwu Patty Ho, Logan Howe, Johannes Hubmayr, Oliver Jeong, Brian Keating, Brian Koopman, Kenji Kiuchi, Akito Kusaka, Jacob Lashner, Adrian Lee, Yaqiong Li, Michele Limon, Marius Lungu, Frederick Matsuda, Philip Mauskopf, Andrew May, Nialh McCallum, Jeff McMahon, Federico Nati, Michael Niemack, John Orlowski-Scherer, Stephen Parshley, Lucio Piccirillo, Mayuri Sathyanarayana Rao, Christopher Raum, Maria Salatino, Joseph Seibert, Carlos Sierra, Max Silva-Feaver, Sara Simon, Suzanne Staggs, Jason Stevens, Aritoki Suzuki, Grant Teply, Robert Thornton, Calvin Tsai, Joel Ullom, Eve Vavagiakis, Michael Vissers, Benjamin Westbrook, Edward Wollack, Zhilei Xu, Ningfeng Zhu

Proceedings Volume 10708, 1070804 (2018) https://doi.org/10.1117/12.2312985

KEYWORDS: Sensors, Receivers, Telescopes, Cryogenics, Physics, Wafer-level optics, Semiconducting wafers, Lenses, Staring arrays, Observatories

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Proceedings Article | 10 July 2018 Presentation

Presentation

POLARBEAR-2: a new CMB polarization receiver system for the Simons array (Conference Presentation)

Masaya Hasegawa, The POLARBEAR COLLABORATION, Peter Ade, Mario Aguilar, Yoshiki Akiba, Aamir Ali, Kam Arnold, Peter Ashton, Carlo Baccigalupi, Darcy Barron, Dominic Beck, Shawn Beckman, Amy Bender, Federico Bianchini, David Boettger, Julian Borrill, Julien Carron, Scott Chapman, Yuji Chinone, Gabriele Coppi, Kevin Crowley, Ari Cukierman, Matt Dobbs, Rolando Dunner, Tucker Elleflot, Josquin Errard, Giulio Fabbian, Stephen Feeney, Chang Feng, George Fuller, Nicholas Galitzki, Andrew Gilbert, Neil Goeckner-Wald, John Groh, Tijmen Haan, Nils Halverson, Takaho Hamada, Masashi Hazumi, Charles Hill, William Holzapfel, Logan Howe, Yuki Inoue, Jennifer Ito, Greg Jaehnig, Andrew Jaffe, Oliver Jeong, Maude Jeune, Daisuke Kaneko, Nobuhiko Katayama, Brian Keating, Reijo Keskitalo, Theodore Kisner, Nicoletta Krachmalnicoff, Akito Kusaka, Adrian Lee, David Leon, Eric Linder, Lindsay Lowry, Alex Madurowicz, Suet Mak, Frederick Matsuda, Tomotake Matsumura, Andrew May, Nathan Miller, Yuto Minami, Joshua Montgomery, Martin Navaroli, Haruki Nishino, Julien Peloton, Anh Pham, Lucio Piccirillo, Richard Plambeck, Davide Poletti, Giuseppe Puglisi, Christopher Raum, Gabriel Rebeiz, Christian Reichardt, Paul Richards, Hayley Roberts, Colin Ross, Kaja Rotermund Rotermund, Yuuko Segawa, Blake Sherwin, Maximiliano Silva-Feaver, Praween Siritanasak, Leo Steinmetz, Radek Stompor, Aritoki Suzuki, Osamu Tajima, Satoru Takakura, Sayuri Takatori, Daiki Tanabe, Raymond Tat, Grant Teply, Takayuki Tomaru, Calvin Tsai Tsai, Clara Verges, Ben Westbrook, Nathan Whitehorn, Alex Zahn, Junichi Suzuki, Takahiro Okamura

Proceedings Volume 10708, 1070802 (2018) https://doi.org/10.1117/12.2311576

KEYWORDS: Receivers, Polarization, Bolometers, Sensors, Multiplexing, Telescopes, Microwave radiation, Helium, Staring arrays, Superconductors

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POLARBEAR-2 is a new receiver system, which will be deployed on the Simons Array telescope platform, for the measurement of Cosmic Microwave Background (CMB) polarization. The science goals with POLARBEAR-2 are to characterize the B-mode signal both at degree and sub-degree angular-scales. The degree-scale polarization data can be used for quantitative studies on inflation, such as the reconstruction of the energy scale of inflation. The sub-degree polarization data is an excellent tracer of large-scale structure in the universe, and will lead to precise constraints on the sum of the neutrino masses. In order to achieve these goals, POLARBEAR-2 employs 7588 polarization-sensitive antenna-coupled transition-edge sensor (TES) bolometers on the focal plane cooled to 0.27K with a three-stage Helium sorption refrigerator, which is ~6 times larger array over the current receiver system. The large TES bolometer array is read-out by an upgraded digital frequency-domain multiplexing system capable of multiplexing 40 bolometers through a single superconducting quantum interference device (SQUID). The first POLARBEAR-2 receiver, POLARBEAR-2A is constructed and the end-to-end testing to evaluate the integrated performance of detector, readout, and optics system is being conducted in the laboratory with various types of test equipments. The POLARBEAR-2A is scheduled to be deployed in 2018 at the Atacama desert in Chile. To further increase measurement sensitivity, two more POLARBEAR-2 type receivers will be deployed soon after the deployment (Simons Array project). The Simons Array will cover four frequency bands at 95GHz, 150GHz, 220GH and 270GHz for better control of the foreground signal. The projected constraints on a tensor-to-scalar ratio (amplitude of inflationary B-mode signal) is σ(r=0.1) = $6.0 \times 10^{-3}$ after foreground removal ($4.0 \times 10^{-3}$ (stat.)), and the sensitivity to the sum of the neutrino masses when combined with DESI spectroscopic galaxy survey data is 40 meV at 1-sigma after foreground removal (19 meV(stat.)). We will present an overview of the design, assembly and status of the laboratory testing of the POLARBEAR-2A receiver system as well as the Simons Array project overview.

Proceedings Article | 10 July 2018 Presentation

Presentation

Electrical characterization and tuning of the integrated POLARBEAR-2a focal plane and readout (Conference Presentation)

Darcy Barron, Kam Arnold, Tucker Elleflot, John Groh, Daisuke Kaneko, Nobuhiko Katayama, Adrian Lee, Lindsay Lowry, Haruki Nishino, Aritoki Suzuki, Sayuri Takatori, P. Ade, Y. Akiba, A. Ali, M. Aguilar, A. Anderson, P. Ashton, J. Avva, D. Beck, C. Baccigalupi, S. Beckman, A. Bender, F. Bianchini, D. Boettger, J. Borrill, J. Carron, S. Chapman, Y. Chinone, G. Coppi, K. Crowley, A. Cukierman, T. de Haan, M. Dobbs, R. Dunner, J. Errard, G. Fabbian, S. Feeney, C. Feng, G. Fuller, N. Galitzki, A. Gilbert, N. Goeckner-Wald, T. Hamada, N. Halverson, M. Hasegawa, M. Hazumi, C. Hill, W. Holzapfel, L. Howe, Y. Inoue, J. Ito, G. Jaehnig, O. Jeong, B. Keating, R. Keskitalo, T. Kisner, N. Krachmalnicoff, A. Kusaka, M. Le Jeune, D. Leon, E. Linder, A. Lowitz, A. Madurowicz, D. Mak, F. Matsuda, T. Matsumura, A. May, N. Miller, Y. Minami, J. Montgomery, T. Natoli, M. Navroli, J. Peloton, A. Pham, L. Piccirillo, D. Plambeck, D. Poletti, G. Puglisi, C. Raum, G. Rebeiz, C. Reichardt, P. Richards, H. Roberts, C. Ross, K. Rotermund, Max Silva Feaver, Y. Segawa, B. Sherwin, P. Siritanasak, L. Steinmetz, R. Stompor, O. Tajima, S. Takakura, D. Tanabe, R. Tat, G. Teply, A. Tikhomirov, T. Tomaru, C. Tsai, C. Verges, B. Westbrook, N. Whitehorn, A. Zahn

Proceedings Volume 10708, 1070808 (2018) https://doi.org/10.1117/12.2311502

KEYWORDS: Bolometers, Polarization, Sensors, Receivers, Microwave radiation, Telescopes, Frequency division multiplexing, Aluminum, Capacitors, Circuit switching

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POLARBEAR is a cosmic microwave background (CMB) polarization experiment located in the Atacama desert in Chile. The science goals of the POLARBEAR project are to do a deep search for CMB B-mode polarization created by inflationary gravitational waves, as well as characterize the CMB B-mode signal from gravitational lensing. POLARBEAR-1 started observations in 2012, and the POLARBEAR team has published a series of results from its first two seasons of observations, including the first measurement of a non-zero B-mode polarization angular power spectrum, measured at sub-degree scales where the dominant signal is gravitational lensing of the CMB. The Simons Array expands POLARBEAR to include an additional two telescopes with next-generation POLARBEAR-2 multi-chroic receivers, observing at 95, 150, 220, and 270 GHz. The POLARBEAR-2A focal plane has 7,588 transition-edge sensor bolometers, read out with frequency-division multiplexing, with 40 frequency channels within the readout bandwidth of 1.5 to 4.5 MHz. The frequency channels are defined by a low-loss lithographed aluminum spiral inductor and interdigitated capacitor in series with each bolometer, creating a resonant frequency for each channel's unique voltage bias and current readout. Characterization of the readout includes measuring resonant peak locations and heights and fitting to a circuit model both above and below the bolometer superconducting transition temperature. This information is used determine the optimal detector bias frequencies and characterize stray impedances which may affect bolometer operation and stability. The detector electrical characterization includes measurements of the transition properties by sweeping in temperature and in voltage bias, measurements of the bolometer saturation power, as well as measuring and removing any biases introduced by the readout circuit. We present results from the characterization, tuning, and operation of the fully integrated focal plane and readout for the first POLARBEAR-2 receiver, POLARBEAR-2A, during its pre-deployment integration run.

Proceedings Article | 10 July 2018 Presentation

Presentation

Multiscale multichroic focal-plane architecture for measurements of the cosmic microwave background (Conference Presentation)

Ari Cukierman, Adrian Lee, Christopher Raum, Aritoki Suzuki, Benjamin Westbrook

Proceedings Volume 10708, 107081K (2018) https://doi.org/10.1117/12.2314163

KEYWORDS: Microwave radiation, Phased arrays, Sensors, Cryogenics, Antennas, Semiconducting wafers, Astronomy, Staring arrays, Lenses, Bolometers

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Proceedings Article | 8 August 2016 Paper

Paper

POLARBEAR-2: an instrument for CMB polarization measurements

Y. Inoue, P. Ade, Y. Akiba, C. Aleman, K. Arnold, C. Baccigalupi, B. Barch, D. Barron, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, T. de Haan, M. Dobbs, A. Ducout, R. Dünner, T. Elleflot, J. Errard, G. Fabbian, S. Feeney, C. Feng, G. Fuller, A. Gilbert, N. Goeckner-Wald, J. Groh, G. Hall, N. Halverson, T. Hamada, M. Hasegawa, K. Hattori, M. Hazumi, C. Hill, W. Holzapfel, Y. Hori, L. Howe, F. Irie, G. Jaehnig, A. Jaffe, O. Jeong, N. Katayama, J. Kaufman, K. Kazemzadeh, B. Keating, Z. Kermish, R. Keskitalo, T. Kisner, A. Kusaka, M. Le Jeune, A. Lee, D. Leon, E. Linder, L. Lowry, F. Matsuda, T. Matsumura, N. Miller, K. Mizukami, J. Montgomery, M. Navaroli, H. Nishino, H. Paar, J. Peloton, D. Poletti, G. Puglisi, C. Raum, G. Rebeiz, C. Reichardt, P. Richards, C. Ross, K. Rotermund, Y. Segawa, B. Sherwin, I. Shirley, P. Siritanasak, N. Stebor, R. Stompor, J. Suzuki, A. Suzuki, O. Tajima, S. Takada, S. Takatori, G. Teply, A. Tikhomirov, T. Tomaru, N. Whitehorn, A. Zahn, O. Zahn

Proceedings Volume 9914, 99141I (2016) https://doi.org/10.1117/12.2231961

KEYWORDS: Signal detection, Sensors, Polarization, Bolometers, Receivers, Lenses, Optical filters, Physics, Optical filtering, Mirrors

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Proceedings Article | 20 July 2016 Paper

Paper

The Simons Array CMB polarization experiment

N. Stebor, P. Ade, Y. Akiba, C. Aleman, K. Arnold, C. Baccigalupi, B. Barch, D. Barron, S. Beckman, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, T. de Haan, M. Dobbs, A. Ducout, R. Dunner, T. Elleflot, J. Errard, G. Fabbian, S. Feeney, C. Feng, T. Fujino, G. Fuller, A. Gilbert, N. Goeckner-Wald, J. Groh, G. Hall, N. Halverson, T. Hamada, M. Hasegawa, K. Hattori, M. Hazumi, C. Hill, W. Holzapfel, Y. Hori, L. Howe, Y. Inoue, F. Irie, G. Jaehnig, A. Jaffe, O. Jeong, N. Katayama, J. Kaufman, K. Kazemzadeh, B. Keating, Z. Kermish, R. Keskitalo, T. Kisner, A. Kusaka, M. Le Jeune, A. Lee, D. Leon, E. Linder, L. Lowry, F. Matsuda, T. Matsumura, N. Miller, J. Montgomery, M. Navaroli, H. Nishino, H. Paar, J. Peloton, D. Poletti, G. Puglisi, C. Raum, G. Rebeiz, C. Reichardt, P. Richards, C. Ross, K. Rotermund, Y. Segawa, B. Sherwin, I. Shirley, P. Siritanasak, L. Steinmetz, R. Stompor, A. Suzuki, O. Tajima, S. Takada, S. Takatori, G. Teply, A. Tikhomirov, T. Tomaru, B. Westbrook, N. Whitehorn, A. Zahn, O. Zahn

Proceedings Volume 9914, 99141H (2016) https://doi.org/10.1117/12.2233103

KEYWORDS: Polarization, Polarization, Receivers, Bolometers, Cryogenics, Telescopes, Sensors, Physics, Detector arrays, Staring arrays, Astronomy

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Proceedings Article | 19 August 2014 Paper

Paper

The Simons Array: expanding POLARBEAR to three multi-chroic telescopes

K. Arnold, N. Stebor, P. A. Ade, Y. Akiba, A. Anthony, M. Atlas, D. Barron, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, A. Gilbert, N. Goeckner-Wald, N. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. Holzapfel, Y. Hori, Y. Inoue, G. Jaehnig, A. Jaffe, N. Katayama, B. Keating, Z. Kermish, R. Keskitalo, T. Kisner, M. Le Jeune, A. Lee, E. Leitch, E. Linder, F. Matsuda, T. Matsumura, X. Meng, N. Miller, H. Morii, M. Myers, M. Navaroli, H. Nishino, T. Okamura, H. Paar, J. Peloton, D. Poletti, C. Raum, G. Rebeiz, C. Reichardt, P. Richards, C. Ross, K. Rotermund, D. Schenck, B. Sherwin, I. Shirley, M. Sholl, P. Siritanasak, G. Smecher, B. Steinbach, R. Stompor, A. Suzuki, J. Suzuki, S. Takada, S. Takakura, T. Tomaru, B. Wilson, A. Yadav, O. Zahn

Proceedings Volume 9153, 91531F (2014) https://doi.org/10.1117/12.2057332

KEYWORDS: Telescopes, Physics, Polarization, Space telescopes, Receivers, Sensors, Baryon acoustic oscillations, Aerospace engineering, Astronomy, Spatial resolution

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Proceedings Article | 13 February 2008 Paper

Paper

Fabrication and characterization of a thermo-mechanically tunable grating-assisted suspended waveguide filter

C. Raum, R. Tait, R. Gauthier

Proceedings Volume 6898, 68981E (2008) https://doi.org/10.1117/12.778779

KEYWORDS: Waveguides, Bridges, Silicon, Thermal optics, Optical filters, Fiber Bragg gratings, Etching, Temperature metrology, Oxides, Tunable filters

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Proceedings Article | 8 November 2007 Paper

Paper

Fabrication and characterization of an SOI-based thermally tuned phase modulator

Asuquo Eniang, Bassey Obiesio, Kufre Akpan, Christopher Raum

Proceedings Volume 6796, 679632 (2007) https://doi.org/10.1117/12.779380

KEYWORDS: Waveguides, Cameras, Modulators, Silicon, Signal attenuation, Semiconducting wafers, Etching, Receivers, Connectors, Sensors

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Proceedings Article | 12 October 2005 Paper

Paper

Analysis of a bistable thermally tunable waveguide

C. Raum, R. Gauthier, N. Tait

Proceedings Volume 5970, 597019 (2005) https://doi.org/10.1117/12.628870

KEYWORDS: Waveguides, Fiber Bragg gratings, Silicon, Temperature metrology, Beam shaping, Thermal optics, Optical filters, Refractive index, Reflectivity, Thermal effects

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