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939 results on '"Bazarko, A"'

1. Simons Observatory: Pre-deployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands

Author: Sierra, Carlos E., Harrington, Kathleen, Sutariya, Shreya, Alford, Thomas, Kofman, Anna M., Chesmore, Grace E., Austermann, Jason E., Bazarko, Andrew, Beall, James A., Bhandarkar, Tanay, Devlin, Mark J., Dicker, Simon R., Dow, Peter N., Duff, Shannon M., Dutcher, Daniel, Galitzki, Nicholas, Golec, Joseph E., Groh, John C., Gudmundsson, Jon E., Haridas, Saianeesh K., Healy, Erin, Hubmayr, Johannes, Iuliano, Jeffrey, Johnson, Bradley R., Lessler, Claire S., Lew, Richard A., Link, Michael J., Lucas, Tammy J., McMahon, Jeffrey J., Moore, Jenna E., Nati, Federico, Niemack, Michael D., Schmitt, Benjamin L., Silva-Feaver, Max, Singh, Robinjeet, Sonka, Rita F., Thomas, Alex, Thornton, Robert J., Tsan, Tran, Ullom, Joel N., Van Lanen, Jeffrey L., Vavagiakis, Eve M., Vissers, Michael R., Wang, Yuhan, and Zheng, Kaiwen
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Simons Observatory will map the temperature and polarization over half of the sky, at millimeter wavelengths in six spectral bands from the Atacama Desert in Chile. These data will provide new insights into the genesis, content, and history of our Universe; the astrophysics of galaxies and galaxy clusters; objects in our solar system; and time-varying astrophysical phenomena. This ambitious new instrument suite, initially comprising three 0.5 m small-aperture telescopes and one 6 m large aperture telescope, is designed using a common combination of new technologies and new implementations to realize an observatory significantly more capable than the previous generation. In this paper, we present the pre-deployment performance of the first mid-frequency "optics tube" which will be fielded on the large aperture telescope with sensitivity to the 90 and 150 GHz spectral bands. This optics tube contains lenses, filters, detectors, and readout components, all of which operate at cryogenic temperatures. It is one of seven that form the core of the large aperture telescope receiver in its initial deployment. We describe this optics tube, including details of comprehensive testing methods, new techniques for beam and passband characterization, and its measured performance. The performance metrics include beams, optical efficiency, passbands, and forecasts for the on-sky performance of the system. We forecast a sensitivity that exceeds the requirements of the large aperture telescope with greater than 30% margin in each spectral band, and predict that the instrument will realize diffraction-limited performance and the expected detector passbands.
Published: 2024

2. The Simons Observatory: Design, integration, and testing of the small aperture telescopes

Author: Galitzki, Nicholas, Tsan, Tran, Spisak, Jake, Randall, Michael, Silva-Feaver, Max, Seibert, Joseph, Lashner, Jacob, Adachi, Shunsuke, Adkins, Sean M., Alford, Thomas, Arnold, Kam, Ashton, Peter C., Austermann, Jason E., Baccigalupi, Carlo, Bazarko, Andrew, Beall, James A., Bhimani, Sanah, Bixler, Bryce, Coppi, Gabriele, Corbett, Lance, Crowley, Kevin D., Crowley, Kevin T., Day-Weiss, Samuel, Dicker, Simon, Dow, Peter N., Duell, Cody J., Duff, Shannon M., Gerras, Remington G., Groh, John C., Gudmundsson, Jon E., Harrington, Kathleen, Hasegawa, Masaya, Healy, Erin, Henderson, Shawn W., Hubmayr, Johannes, Iuliano, Jeffrey, Johnson, Bradley R., Keating, Brian, Keller, Ben, Kiuchi, Kenji, Kofman, Anna M., Koopman, Brian J., Kusaka, Akito, Lee, Adrian T., Lew, Richard A., Lin, Lawrence T., Link, Michael J, Lucas, Tammy J., Lungu, Marius, Mangu, Aashrita, McMahon, Jeffrey J, Miller, Amber D., Moore, Jenna E., Morshed, Magdy, Nakata, Hironobu, Nati, Federico, Newburgh, Laura B., Nguyen, David V., Niemack, Michael D., Page, Lyman A., Sakaguri, Kana, Sakurai, Yuki, Rao, Mayuri Sathyanarayana, Saunders, Lauren J., Shroyer, Jordan E., Sugiyama, Junna, Tajima, Osamu, Takeuchi, Atsuto, Bua, Refilwe Tanah, Teply, Grant, Terasaki, Tomoki, Ullom, Joel N., Van Lanen, Jeffrey L., Vavagiakis, Eve M., Vissers, Michael R, Walters, Liam, Wang, Yuhan, Xu, Zhilei, Yamada, Kyohei, and Zheng, Kaiwen
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5,200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes to a sensitivity of $\sigma(r)=0.002$, with quantified systematic errors well below this value. Each SAT is a self-contained cryogenic telescope with a 35$^\circ$ field of view, 42 cm diameter optical aperture, 40 K half-wave plate, 1 K refractive optics, and $<0.1$ K focal plane that holds $>12,000$ TES detectors. We describe the nominal design of the SATs and present details about the integration and testing for one operating at 93 and 145 GHz.
Published: 2024

3. The Simons Observatory Large Aperture Telescope Receiver

Author: Zhu, Ningfeng, Bhandarkar, Tanay, Coppi, Gabriele, Kofman, Anna M., Orlowski-Scherer, John L., Xu, Zhilei, Adachi, Shunsuke, Ade, Peter, Aiola, Simone, Austermann, Jason, Bazarko, Andrew O., Beall, James A., Bhimani, Sanah, Bond, J. Richard, Chesmore, Grace E., Choi, Steve K., Connors, Jake, Cothard, Nicholas F., Devlin, Mark, Dicker, Simon, Dober, Bradley, Duell, Cody J., Duff, Shannon M., Dünner, Rolando, Fabbian, Giulio, Galitzki, Nicholas, Gallardo, Patricio A., Golec, Joseph E., Haridas, Saianeesh K., Harrington, Kathleen, Healy, Erin, Ho, Shuay-Pwu Patty, Huber, Zachary B., Hubmayr, Johannes, Iuliano, Jeffrey, Johnson, Bradley R., Keatin, Brian, Kiuchi, Kenji, Koopman, Brian J., Lashner, Jack, Lee, Adrian T., Li, Yaqiong, Limon, Michele, Link, Michael, Lucas, Tammy J, McCarrick, Heather, Moore, Jenna, Nati, Federico, Newburgh, Laura B., Niemack, Michael D., Pierpaoli, Elena, Randall, Michael J., Sarmiento, Karen Perez, Saunders, Lauren J., Seibert, Joseph, Sierra, Carlos, Sonka, Rita, Spisak, Jacob, Sutariya, Shreya, Tajima, Osamu, Teply, Grant P., Thornton, Robert J., Tsan, Tran, Tucker, Carole, Ullom, Joel, Vavagiakis, Eve M., Vissers, Michael R., Walker, Samantha, Westbrook, Benjamin, Wollack, Edward J., and Zannoni, Mario
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Simons Observatory (SO) Large Aperture Telescope Receiver (LATR) will be coupled to the Large Aperture Telescope located at an elevation of 5,200 m on Cerro Toco in Chile. The resulting instrument will produce arcminute-resolution millimeter-wave maps of half the sky with unprecedented precision. The LATR is the largest cryogenic millimeter-wave camera built to date with a diameter of 2.4 m and a length of 2.6 m. It cools 1200 kg of material to 4 K and 200 kg to 100 mk, the operating temperature of the bolometric detectors with bands centered around 27, 39, 93, 145, 225, and 280 GHz. Ultimately, the LATR will accommodate 13 40 cm diameter optics tubes, each with three detector wafers and a total of 62,000 detectors. The LATR design must simultaneously maintain the optical alignment of the system, control stray light, provide cryogenic isolation, limit thermal gradients, and minimize the time to cool the system from room temperature to 100 mK. The interplay between these competing factors poses unique challenges. We discuss the trade studies involved with the design, the final optimization, the construction, and ultimate performance of the system.
Published: 2021
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4. The Simons Observatory: Metamaterial Microwave Absorber (MMA) and its Cryogenic Applications

Author: Xu, Zhilei, Chesmore, Grace E., Adachi, Shunsuke, Ali, Aamir M., Bazarko, Andrew, Coppi, Gabriele, Devlin, Mark, Devlin, Tom, Dicker, Simon R., Gallardo, Patricio A., Golec, Joseph E., Gudmundsson, Jon E., Harrington, Kathleen, Hattori, Makoto, Kofman, Anna, Kiuchi, Kenji, Kusaka, Akito, Limon, Michele, Matsuda, Frederick, McMahon, Jeff, Nati, Federico, Niemack, Michael D., Sutariya, Shreya, Suzuki, Aritoki, Teply, Grant P., Thornton, Robert J., Wollack, Edward J., Zannoni, Mario, and Zhu, Ningfeng
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Controlling stray light at millimeter wavelengths requires special optical design and selection of absorptive materials that should be compatible with cryogenic operating environments. While a wide selection of absorptive materials exists, these typically exhibit high indices of refraction and reflect/scatter a significant fraction of light before absorption. For many lower index materials such as commercial microwave absorbers, their applications in cryogenic environments are challenging. In this paper, we present a new tool to control stray light: metamaterial microwave absorber tiles. These tiles comprise an outer metamaterial layer that approximates a lossy gradient index anti-reflection coating. They are fabricated via injection molding commercially available carbon-loaded polyurethane (25\% by mass). The injection molding technology enables mass production at low cost. The design of these tiles is presented, along with thermal tests to 1 K. Room temperature optical measurements verify their control of reflectance to less than 1\% up to 65$\circ$ angles of incidence, and control of wide angle scattering below 0.01\%. The dielectric properties of the bulk carbon-loaded material used in the tiles is also measured at different temperatures, confirming that the material maintains similar dielectric properties down to 3 K., Comment: 10 pages, 11 figures, published in Applied Optics, selected as "Editor's pick"
Published: 2020
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5. The Simons Observatory: Modeling Optical Systematics in the Large Aperture Telescope

Author: Gudmundsson, Jon E., Gallardo, Patricio A., Puddu, Roberto, Dicker, Simon R., Adler, Alexandre E., Ali, Aamir M., Bazarko, Andrew, Chesmore, Grace E., Coppi, Gabriele, Cothard, Nicholas F., Dachlythra, Nadia, Devlin, Mark, Dünner, Rolando, Fabbian, Giulio, Galitzki, Nicholas, Golec, Joseph E., Ho, Shuay-Pwu Patty, Hargrave, Peter C., Kofman, Anna M., Lee, Adrian T., Limon, Michele, Matsuda, Frederick T., Mauskopf, Philip D., Moodley, Kavilan, Nati, Federico, Niemack, Michael D., Orlowski-Scherer, John, Page, Lyman A., Partridge, Bruce, Puglisi, Giuseppe, Reichardt, Christian L., Sierra, Carlos E., Simon, Sara M., Teply, Grant P., Tucker, Carole, Wollack, Edward J., Xu, Zhilei, and Zhu, Ningfeng
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present geometrical and physical optics simulation results for the Simons Observatory Large Aperture Telescope. This work was developed as part of the general design process for the telescope; allowing us to evaluate the impact of various design choices on performance metrics and potential systematic effects. The primary goal of the simulations was to evaluate the final design of the reflectors and the cold optics which are now being built. We describe non-sequential ray tracing used to inform the design of the cold optics, including absorbers internal to each optics tube. We discuss ray tracing simulations of the telescope structure that allow us to determine geometries that minimize detector loading and mitigate spurious near-field effects that have not been resolved by the internal baffling. We also describe physical optics simulations, performed over a range of frequencies and field locations, that produce estimates of monochromatic far field beam patterns which in turn are used to gauge general optical performance. Finally, we describe simulations that shed light on beam sidelobes from panel gap diffraction., Comment: 15 pages, 13 figures
Published: 2020
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6. Small Aperture Telescopes for the Simons Observatory

Author: Ali, Aamir M., Adachi, Shunsuke, Arnold, Kam, Ashton, Peter, Bazarko, Andrew, Chinone, Yuji, Coppi, Gabriele, Corbett, Lance, Crowley, Kevin D, Crowley, Kevin T, Devlin, Mark, Dicker, Simon, Duff, Shannon, Ellis, Chris, Galitzki, Nicholas, Goeckner-Wald, Neil, Harrington, Kathleen, Healy, Erin, Hill, Charles A, Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Keating, Brian, Kiuchi, Kenji, Kusaka, Akito, Lee, Adrian T, Ludlam, Michael, Mangu, Aashrita, Matsuda, Frederick, McCarrick, Heather, Nati, Federico, Niemack, Michael D., Nishino, Haruki, Orlowski-Scherer, John, Rao, Mayuri Sathyanarayana, Raum, Christopher, Sakurai, Yuki, Salatino, Maria, Sasse, Trevor, Seibert, Joseph, Sierra, Carlos, Silva-Feaver, Maximiliano, Spisak, Jacob, Simon, Sara M, Staggs, Suzanne, Tajima, Osamu, Teply, Grant, Tsan, Tran, Wollack, Edward, Westbrook, Bejamin, Xu, Zhilei, Zannoni, Mario, and Zhu, Ningfeng
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The Simons Observatory (SO) is an upcoming cosmic microwave background (CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in temperature and polarization in six frequency bands spanning 27 to 285 GHz. SO will consist of one 6-meter Large Aperture Telescope (LAT) fielding $\sim$30,000 detectors and an array of three 0.42-meter Small Aperture Telescopes (SATs) fielding an additional 30,000 detectors. This synergy will allow for the extremely sensitive characterization of the CMB over angular scales ranging from an arcmin to tens of degrees, enabling a wide range of scientific output. Here we focus on the SATs targeting degree angular scales with successive dichroic instruments observing at Mid-Frequency (MF: 93/145 GHz), Ultra-High-Frequency (UHF: 225/285 GHz), and Low-Frequency (LF: 27/39 GHz). The three SATs will be able to map $\sim$10% of the sky to a noise level of 2 $\mu$K-arcmin when combining 93 and 145 GHz. The multiple frequency bands will allow the CMB to be separated from galactic foregrounds (primarily synchrotron and dust), with the primary science goal of characterizing the primordial tensor-to-scalar ratio, $r$, at a target level of $\sigma \left(r\right) \approx 0.003$.
Published: 2020
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7. The Simons Observatory: Astro2020 Decadal Project Whitepaper

Author: The Simons Observatory Collaboration, Abitbol, Maximilian H., Adachi, Shunsuke, Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A., Arnold, Kam, Ashton, Peter, Atkins, Zachary, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Lizancos, Anton Baleato, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A., Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bhandarkar, Tanay, Bhimani, Sanah, Bianchini, Federico, Boada, Steven, Boettger, David, Bolliet, Boris, Bond, J. Richard, Borrill, Julian, Brown, Michael L., Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Carl, Fred. M, Cayuso, Juan, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Clark, Susan, Clarke, Philip, Contaldi, Carlo, Coppi, Gabriele, Cothard, Nicholas F., Coughlin, Kevin, Coulton, Will, Crichton, Devin, Crowley, Kevin D., Crowley, Kevin T., Cukierman, Ari, D'Ewart, John M., Dünner, Rolando, de Haan, Tijmen, Devlin, Mark, Dicker, Simon, Dober, Bradley, Duell, Cody J., Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Bouhargani, Hamza El, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Fergusson, James, Ferraro, Simone, Fluxà, Pedro, Freese, Katherine, Frisch, Josef C., Frolov, Andrei, Fuller, George, Galitzki, Nicholas, Gallardo, Patricio A., Ghersi, Jose Tomas Galvez, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, Gudmundsson, Jon E., Halpern, Mark, Han, Dongwon, Hargrave, Peter, Harrington, Kathleen, Hasegawa, Masaya, Hasselfield, Matthew, Hattori, Makoto, Haynes, Victor, Hazumi, Masashi, Healy, Erin, Henderson, Shawn W., Hensley, Brandon, Hervias-Caimapo, Carlos, Hill, Charles A., Hill, J. Colin, Hilton, Gene, Hilton, Matt, Hincks, Adam D., Hinshaw, Gary, Hložek, Renée, Ho, Shirley, Ho, Shuay-Pwu Patty, Hoang, Thuong D., Hoh, Jonathan, Hotinli, Selim C., Huang, Zhiqi, Hubmayr, Johannes, Huffenberger, Kevin, Hughes, John P., Ijjas, Anna, Ikape, Margaret, Irwin, Kent, Jaffe, Andrew H., Jain, Bhuvnesh, Jeong, Oliver, Johnson, Matthew, Kaneko, Daisuke, Karpel, Ethan D., Katayama, Nobuhiko, Keating, Brian, Keskitalo, Reijo, Kisner, Theodore, Kiuchi, Kenji, Klein, Jeff, Knowles, Kenda, Kofman, Anna, Koopman, Brian, Kosowsky, Arthur, Krachmalnicoff, Nicoletta, Kusaka, Akito, LaPlante, Phil, Lashner, Jacob, Lee, Adrian, Lee, Eunseong, Lewis, Antony, Li, Yaqiong, Li, Zack, Limon, Michele, Linder, Eric, Liu, Jia, Lopez-Caraballo, Carlos, Louis, Thibaut, Lungu, Marius, Madhavacheril, Mathew, Mak, Daisy, Maldonado, Felipe, Mani, Hamdi, Mates, Ben, Matsuda, Frederick, Maurin, Loïc, Mauskopf, Phil, May, Andrew, McCallum, Nialh, McCarrick, Heather, McKenney, Chris, McMahon, Jeff, Meerburg, P. Daniel, Mertens, James, Meyers, Joel, Miller, Amber, Mirmelstein, Mark, Moodley, Kavilan, Moore, Jenna, Munchmeyer, Moritz, Munson, Charles, Murata, Masaaki, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Navaroli, Martin, Newburgh, Laura, Nguyen, Ho Nam, Nicola, Andrina, Niemack, Mike, Nishino, Haruki, Nishinomiya, Yume, Orlowski-Scherer, John, Pagano, Luca, Partridge, Bruce, Perrotta, Francesca, Phakathi, Phumlani, Piccirillo, Lucio, Pierpaoli, Elena, Pisano, Giampaolo, Poletti, Davide, Puddu, Roberto, Puglisi, Giuseppe, Raum, Chris, Reichardt, Christian L., Remazeilles, Mathieu, Rephaeli, Yoel, Riechers, Dominik, Rojas, Felipe, Rotti, Aditya, Roy, Anirban, Sadeh, Sharon, Sakurai, Yuki, Salatino, Maria, Rao, Mayuri Sathyanarayana, Saunders, Lauren, Schaan, Emmanuel, Schmittfull, Marcel, Sehgal, Neelima, Seibert, Joseph, Seljak, Uros, Shellard, Paul, Sherwin, Blake, Shimon, Meir, Sierra, Carlos, Sievers, Jonathan, Sifon, Cristobal, Sikhosana, Precious, Silva-Feaver, Maximiliano, Simon, Sara M., Sinclair, Adrian, Smith, Kendrick, Sohn, Wuhyun, Sonka, Rita, Spergel, David, Spisak, Jacob, Staggs, Suzanne T., Stein, George, Stevens, Jason R., Stompor, Radek, Suzuki, Aritoki, Tajima, Osamu, Takakura, Satoru, Teply, Grant, Thomas, Daniel B., Thorne, Ben, Thornton, Robert, Trac, Hy, Treu, Jesse, Tsai, Calvin, Tucker, Carole, Ullom, Joel, Vagnozzi, Sunny, van Engelen, Alexander, Van Lanen, Jeff, Van Winkle, Daniel D., Vavagiakis, Eve M., Vergès, Clara, Vissers, Michael, Wagoner, Kasey, Walker, Samantha, Wang, Yuhan, Ward, Jon, Westbrook, Ben, Whitehorn, Nathan, Williams, Jason, Williams, Joel, Wollack, Edward, Xu, Zhilei, Yasini, Siavash, Young, Edward, Yu, Byeonghee, Yu, Cyndia, Zago, Fernando, Zannoni, Mario, Zhang, Hezi, Zheng, Kaiwen, Zhu, Ningfeng, and Zonca, Andrea
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough discoveries in fundamental physics, cosmology, and astrophysics. Supported by the Simons Foundation, the Heising-Simons Foundation, and with contributions from collaborating institutions, SO will see first light in 2021 and start a five year survey in 2022. SO has 287 collaborators from 12 countries and 53 institutions, including 85 students and 90 postdocs. The SO experiment in its currently funded form ('SO-Nominal') consists of three 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT). Optimized for minimizing systematic errors in polarization measurements at large angular scales, the SATs will perform a deep, degree-scale survey of 10% of the sky to search for the signature of primordial gravitational waves. The LAT will survey 40% of the sky with arc-minute resolution. These observations will measure (or limit) the sum of neutrino masses, search for light relics, measure the early behavior of Dark Energy, and refine our understanding of the intergalactic medium, clusters and the role of feedback in galaxy formation. With up to ten times the sensitivity and five times the angular resolution of the Planck satellite, and roughly an order of magnitude increase in mapping speed over currently operating ("Stage 3") experiments, SO will measure the CMB temperature and polarization fluctuations to exquisite precision in six frequency bands from 27 to 280 GHz. SO will rapidly advance CMB science while informing the design of future observatories such as CMB-S4., Comment: Astro2020 Decadal Project Whitepaper. arXiv admin note: text overlap with arXiv:1808.07445
Published: 2019

8. The Simons Observatory: Design, Integration, and Testing of the Small Aperture Telescopes

Author: Nicholas Galitzki, Tran Tsan, Jake Spisak, Michael Randall, Max Silva-Feaver, Joseph Seibert, Jacob Lashner, Shunsuke Adachi, Sean M. Adkins, Thomas Alford, Kam Arnold, Peter C. Ashton, Jason E. Austermann, Carlo Baccigalupi, Andrew Bazarko, James A. Beall, Sanah Bhimani, Bryce Bixler, Gabriele Coppi, Lance Corbett, Kevin D. Crowley, Kevin T. Crowley, Samuel Day-Weiss, Mark J. Devlin, Simon Dicker, Brooke DiGia, Peter N. Dow, Cody J. Duell, Shannon M. Duff, Remington G. Gerras, John C. Groh, Jon E. Gudmundsson, Kathleen Harrington, Masaya Hasegawa, Erin Healy, Shawn W. Henderson, Johannes Hubmayr, Jeffrey Iuliano, Bradley R. Johnson, Brian Keating, Ben Keller, Kenji Kiuchi, Anna M. Kofman, Brian J. Koopman, Akito Kusaka, Adrian T. Lee, Richard A. Lew, Lawrence T. Lin, Michael J. Link, Tammy J. Lucas, Marius Lungu, Aashrita Mangu, Jeffrey J McMahon, Amber D. Miller, Jenna E. Moore, Magdy Morshed, Hironobu Nakata, Federico Nati, Laura B. Newburgh, David V. Nguyen, Michael D. Niemack, Lyman A. Page, Kana Sakaguri, Yuki Sakurai, Mayuri Sathyanarayana Rao, Lauren J. Saunders, Jordan E. Shroyer, Junna Sugiyama, Osamu Tajima, Atsuto Takeuchi, Refilwe Tanah Bua, Grant Teply, Tomoki Terasaki, Joel N. Ullom, Jeffrey L. Van Lanen, Eve M. Vavagiakis, Michael R Vissers, Liam Walters, Yuhan Wang, Zhilei Xu, Kyohei Yamada, and Kaiwen Zheng
Subjects: Cosmic microwave background radiation, Millimeter astronomy, Ground telescopes, Telescopes, Astrophysics, QB460-466
Abstract: The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes to a sensitivity of σ ( r ) = 0.002, with quantified systematic errors well below this value. Each SAT is a self-contained cryogenic telescope with a 35° field of view, 42 cm diameter optical aperture, 40 K half-wave plate, 1 K refractive optics, and 12,000 transition edge sensor detectors. We describe the nominal design of the SATs and present details about the integration and testing for one operating at 93 and 145 GHz.
Published: 2024
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9. The Simons Observatory: Science goals and forecasts

Author: The Simons Observatory Collaboration, Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A., Arnold, Kam, Ashton, Peter, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A., Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bianchini, Federico, Boada, Steven, Boettger, David, Bond, J. Richard, Borrill, Julian, Brown, Michael L., Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Coppi, Gabriele, Cothard, Nicholas F., Coughlin, Kevin, Crichton, Devin, Crowley, Kevin D., Crowley, Kevin T., Cukierman, Ari, D'Ewart, John M., Dünner, Rolando, de Haan, Tijmen, Devlin, Mark, Dicker, Simon, Didier, Joy, Dobbs, Matt, Dober, Bradley, Duell, Cody J., Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Dusatko, John, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Ferraro, Simone, Fluxà, Pedro, Freese, Katherine, Frisch, Josef C., Frolov, Andrei, Fuller, George, Fuzia, Brittany, Galitzki, Nicholas, Gallardo, Patricio A., Ghersi, Jose Tomas Galvez, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, Gudmundsson, Jon E., Han, Dongwon, Hargrave, Peter, Hasegawa, Masaya, Hasselfield, Matthew, Hattori, Makoto, Haynes, Victor, Hazumi, Masashi, He, Yizhou, Healy, Erin, Henderson, Shawn W., Hervias-Caimapo, Carlos, Hill, Charles A., Hill, J. Colin, Hilton, Gene, Hilton, Matt, Hincks, Adam D., Hinshaw, Gary, Hložek, Renée, Ho, Shirley, Ho, Shuay-Pwu Patty, Howe, Logan, Huang, Zhiqi, Hubmayr, Johannes, Huffenberger, Kevin, Hughes, John P., Ijjas, Anna, Ikape, Margaret, Irwin, Kent, Jaffe, Andrew H., Jain, Bhuvnesh, Jeong, Oliver, Kaneko, Daisuke, Karpel, Ethan D., Katayama, Nobuhiko, Keating, Brian, Kernasovskiy, Sarah S., Keskitalo, Reijo, Kisner, Theodore, Kiuchi, Kenji, Klein, Jeff, Knowles, Kenda, Koopman, Brian, Kosowsky, Arthur, Krachmalnicoff, Nicoletta, Kuenstner, Stephen E., Kuo, Chao-Lin, Kusaka, Akito, Lashner, Jacob, Lee, Adrian, Lee, Eunseong, Leon, David, Leung, Jason S. -Y., Lewis, Antony, Li, Yaqiong, Li, Zack, Limon, Michele, Linder, Eric, Lopez-Caraballo, Carlos, Louis, Thibaut, Lowry, Lindsay, Lungu, Marius, Madhavacheril, Mathew, Mak, Daisy, Maldonado, Felipe, Mani, Hamdi, Mates, Ben, Matsuda, Frederick, Maurin, Loïc, Mauskopf, Phil, May, Andrew, McCallum, Nialh, McKenney, Chris, McMahon, Jeff, Meerburg, P. Daniel, Meyers, Joel, Miller, Amber, Mirmelstein, Mark, Moodley, Kavilan, Munchmeyer, Moritz, Munson, Charles, Naess, Sigurd, Nati, Federico, Navaroli, Martin, Newburgh, Laura, Nguyen, Ho Nam, Niemack, Michael, Nishino, Haruki, Orlowski-Scherer, John, Page, Lyman, Partridge, Bruce, Peloton, Julien, Perrotta, Francesca, Piccirillo, Lucio, Pisano, Giampaolo, Poletti, Davide, Puddu, Roberto, Puglisi, Giuseppe, Raum, Chris, Reichardt, Christian L., Remazeilles, Mathieu, Rephaeli, Yoel, Riechers, Dominik, Rojas, Felipe, Roy, Anirban, Sadeh, Sharon, Sakurai, Yuki, Salatino, Maria, Rao, Mayuri Sathyanarayana, Schaan, Emmanuel, Schmittfull, Marcel, Sehgal, Neelima, Seibert, Joseph, Seljak, Uros, Sherwin, Blake, Shimon, Meir, Sierra, Carlos, Sievers, Jonathan, Sikhosana, Precious, Silva-Feaver, Maximiliano, Simon, Sara M., Sinclair, Adrian, Siritanasak, Praween, Smith, Kendrick, Smith, Stephen R., Spergel, David, Staggs, Suzanne T., Stein, George, Stevens, Jason R., Stompor, Radek, Suzuki, Aritoki, Tajima, Osamu, Takakura, Satoru, Teply, Grant, Thomas, Daniel B., Thorne, Ben, Thornton, Robert, Trac, Hy, Tsai, Calvin, Tucker, Carole, Ullom, Joel, Vagnozzi, Sunny, van Engelen, Alexander, Van Lanen, Jeff, Van Winkle, Daniel D., Vavagiakis, Eve M., Vergès, Clara, Vissers, Michael, Wagoner, Kasey, Walker, Samantha, Ward, Jon, Westbrook, Ben, Whitehorn, Nathan, Williams, Jason, Williams, Joel, Wollack, Edward J., Xu, Zhilei, Yu, Byeonghee, Yu, Cyndia, Zago, Fernando, Zhang, Hezi, and Zhu, Ningfeng
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes (SATs) and one large-aperture 6-m telescope (LAT), with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The SATs will target the largest angular scales observable from Chile, mapping ~10% of the sky to a white noise level of 2 $\mu$K-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, $r$, at a target level of $\sigma(r)=0.003$. The LAT will map ~40% of the sky at arcminute angular resolution to an expected white noise level of 6 $\mu$K-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the LSST sky region and partially with DESI. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources., Comment: This paper presents an overview of the Simons Observatory science goals, details about the instrument will be presented in a companion paper. The author contribution to this paper is available at https://simonsobservatory.org/publications.php (Abstract abridged) -- matching version published in JCAP
Published: 2018
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10. CCAT-prime: a novel telescope for submillimeter astronomy

Author: Parshley, Stephen C., Kronshage, Jörg, Blair, James, Herter, Terry, Nolta, Mike, Stacey, Gordon J., Bazarko, Andrew, Bertoldi, Frank, Bustos, Ricardo, Campbell, Donald B., Chapman, Scott, Cothard, Nicholas, Devlin, Mark, Erler, Jens, Fich, Michel, Gallardo, Patricio A., Giovanelli, Riccardo, Graf, Urs, Gramke, Scott, Haynes, Martha P., Hills, Richard, Limon, Michele, Mangum, Jeffrey G., McMahon, Jeff, Niemack, Michael D., Nikola, Thomas, Omlor, Markus, Riechers, Dominik A., Steeger, Karl, Stutzki, Jürgen, and Vavagiakis, Eve M.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The CCAT-prime telescope is a 6-meter aperture, crossed-Dragone telescope, designed for millimeter and sub-millimeter wavelength observations. It will be located at an altitude of 5600 meters, just below the summit of Cerro Chajnantor in the high Atacama region of Chile. The telescope's unobscured optics deliver a field of view of almost 8 degrees over a large, flat focal plane, enabling it to accommodate current and future instrumentation fielding >100k diffraction-limited beams for wavelengths less than a millimeter. The mount is a novel design with the aluminum-tiled mirrors nested inside the telescope structure. The elevation housing has an integrated shutter that can enclose the mirrors, protecting them from inclement weather. The telescope is designed to co-host multiple instruments over its nominal 15 year lifetime. It will be operated remotely, requiring minimum maintenance and on-site activities due to the harsh working conditions on the mountain. The design utilizes nickel-iron alloy (Invar) and carbon-fiber-reinforced polymer (CFRP) materials in the mirror support structure, achieving a relatively temperature-insensitive mount. We discuss requirements, specifications, critical design elements, and the expected performance of the CCAT-prime telescope. The telescope is being built by CCAT Observatory, Inc., a corporation formed by an international partnership of universities. More information about CCAT and the CCAT-prime telescope can be found at www.ccatobservatory.org., Comment: Event: SPIE Astronomical Telescope + Instrumentation, 2018, Austin, Texas, USA; Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 107005X (2018)
Published: 2018
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11. The Simons Observatory: Astro2020 Decadal Project Whitepaper

Author: Collaboration, The Simons Observatory, Abitbol, Maximilian H, Adachi, Shunsuke, Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A, Arnold, Kam, Ashton, Peter, Atkins, Zachary, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Lizancos, Anton Baleato, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A, Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bhandarkar, Tanay, Bhimani, Sanah, Bianchini, Federico, Boada, Steven, Boettger, David, Bolliet, Boris, Bond, J Richard, Borrill, Julian, Brown, Michael L, Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Carl, Fred M, Cayuso, Juan, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Clark, Susan, Clarke, Philip, Contaldi, Carlo, Coppi, Gabriele, Cothard, Nicholas F, Coughlin, Kevin, Coulton, Will, Crichton, Devin, Crowley, Kevin D, Crowley, Kevin T, Cukierman, Ari, D'Ewart, John M, Dünner, Rolando, Haan, Tijmen de, Devlin, Mark, Dicker, Simon, Dober, Bradley, Duell, Cody J, Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Bouhargani, Hamza El, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Fergusson, James, Ferraro, Simone, Fluxà, Pedro, Freese, Katherine, Frisch, Josef C, Frolov, Andrei, Fuller, George, Galitzki, Nicholas, Gallardo, Patricio A, Ghersi, Jose Tomas Galvez, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, and Gudmundsson, Jon E
Subjects: astro-ph.IM
Abstract: The Simons Observatory (SO) is a ground-based cosmic microwave background(CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile thatpromises to provide breakthrough discoveries in fundamental physics, cosmology,and astrophysics. Supported by the Simons Foundation, the Heising-SimonsFoundation, and with contributions from collaborating institutions, SO will seefirst light in 2021 and start a five year survey in 2022. SO has 287collaborators from 12 countries and 53 institutions, including 85 students and90 postdocs. The SO experiment in its currently funded form ('SO-Nominal') consists ofthree 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large ApertureTelescope (LAT). Optimized for minimizing systematic errors in polarizationmeasurements at large angular scales, the SATs will perform a deep,degree-scale survey of 10% of the sky to search for the signature of primordialgravitational waves. The LAT will survey 40% of the sky with arc-minuteresolution. These observations will measure (or limit) the sum of neutrinomasses, search for light relics, measure the early behavior of Dark Energy, andrefine our understanding of the intergalactic medium, clusters and the role offeedback in galaxy formation. With up to ten times the sensitivity and five times the angular resolution ofthe Planck satellite, and roughly an order of magnitude increase in mappingspeed over currently operating ("Stage 3") experiments, SO will measure the CMBtemperature and polarization fluctuations to exquisite precision in sixfrequency bands from 27 to 280 GHz. SO will rapidly advance CMB science whileinforming the design of future observatories such as CMB-S4.
Published: 2019

12. The Simons Observatory: Science goals and forecasts

Author: Ade, P, Aguirre, J, Ahmed, Z, Aiola, S, Ali, A, Alonso, D, Alvarez, MA, Arnold, K, Ashton, P, Austermann, J, Awan, H, Baccigalupi, C, Baildon, T, Barron, D, Battaglia, N, Battye, R, Baxter, E, Bazarko, A, Beall, JA, Bean, R, Beck, D, Beckman, S, Beringue, B, Bianchini, F, Boada, S, Boettger, D, Bond, JR, Borrill, J, Brown, ML, Bruno, SM, Bryan, S, Calabrese, E, Calafut, V, Calisse, P, Carron, J, Challinor, A, Chesmore, G, Chinone, Y, Chluba, J, Cho, HMS, Choi, S, Coppi, G, Cothard, NF, Coughlin, K, Crichton, D, Crowley, KD, Crowley, KT, Cukierman, A, D'Ewart, JM, Dünner, R, De Haan, T, Devlin, M, Dicker, S, Didier, J, Dobbs, M, Dober, B, Duell, CJ, Duff, S, Duivenvoorden, A, Dunkley, J, Dusatko, J, Errard, J, Fabbian, G, Feeney, S, Ferraro, S, Fluxà, P, Freese, K, Frisch, JC, Frolov, A, Fuller, G, Fuzia, B, Galitzki, N, Gallardo, PA, Ghersi, JTG, Gao, J, Gawiser, E, Gerbino, M, Gluscevic, V, Goeckner-Wald, N, Golec, J, Gordon, S, Gralla, M, Green, D, Grigorian, A, Groh, J, Groppi, C, Guan, Y, Gudmundsson, JE, Han, D, Hargrave, P, Hasegawa, M, Hasselfield, M, Hattori, M, Haynes, V, Hazumi, M, He, Y, Healy, E, Henderson, SW, Hervias-Caimapo, C, and Hill, CA
Subjects: CMBR experiments, CMBR polarisation, cosmological parameters from CMBR, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping 10% of the sky to a white noise level of 2 μK-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of σ(r)=0.003. The large aperture telescope will map 40% of the sky at arcminute angular resolution to an expected white noise level of 6 μK-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.
Published: 2019

13. Test of Lorentz and CPT violation with Short Baseline Neutrino Oscillation Excesses

Author: The MiniBooNE Collaboration, Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Dharmapalan, R., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Grange, J., Green, C., Green, J. A., Hart, T. L., Hawker, E., Huelsnitz, W., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Mousseau, J., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R. G., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: The sidereal time dependence of MiniBooNE electron neutrino and anti-electron neutrino appearance data are analyzed to search for evidence of Lorentz and CPT violation. An unbinned Kolmogorov-Smirnov test shows both the electron neutrino and anti-electron neutrino appearance data are compatible with the null sidereal variation hypothesis to more than 5%. Using an unbinned likelihood fit with a Lorentz-violating oscillation model derived from the Standard Model Extension (SME) to describe any excess events over background, we find that the electron neutrino appearance data prefer a sidereal time-independent solution, and the anti-electron neutrino appearance data slightly prefer a sidereal time-dependent solution. Limits of order 10E-20 GeV are placed on combinations of SME coefficients. These limits give the best limits on certain SME coefficients for muon neutrino to electron neutrino and anti-muon neutrino to anti-electron neutrino oscillations. The fit values and limits of combinations of SME coefficients are provided., Comment: 14 pages, 3 figures, and 2 tables, submitted to Physics Letters B
Published: 2011
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14. Dual baseline search for muon neutrino disappearance at 0.5 eV^2 < \Delta m^2 < 40 eV^2

Author: MiniBooNE, Collaborations, SciBooNE, Mahn, K. B. M., Nakajima, Y., Aguilar-Arevalo, A. A., Alcaraz-Aunion, J. L., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Catala-Perez, J., Cheng, G., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Dharmapalan, R., Djurcic, Z., Dore, U., Finley, D. A., Fleming, B. T., Ford, R., Franke, A. J., Garcia, F. G., Garvey, G. T., Giganti, C., Gomez-Cadenas, J. J., Grange, J., Green, C., Green, J. A., Guzowski, P., Hanson, A., Hart, T. L., Hawker, E., Hayato, Y., Hiraide, K., Huelsnitz, W., Imlay, R., Johnson, R. A., Jones, B. J. P., Jover-Manas, G., Karagiorgi, G., Kasper, P., Katori, T., Kobayashi, Y. K., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Kubo, H., Kurimoto, Y., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Loverre, P. F., Ludovici, L., Mariani, C., Marsh, W., Masuike, S., Matsuoka, K., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Mitsuka, G., Miyachi, Y., Mizugashira, S., Monroe, J., Moore, C. D., Mousseau, J., Nakaya, T., Napora, R., Nelson, R. H., Nienaber, P., Nowak, J. A., Orme, D., Osmanov, B., Otani, M., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sanchez, F., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shibata, T. -A., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Takei, H., Tanaka, H. A., Tanaka, H. -K., Tanaka, M., Tayloe, R., Taylor, I. J., Tesarek, R. J., Tzanov, M., Uchida, Y., Van de Water, R., Walding, J. J., Wascko, M. O., White, D. H., White, H. B., Wilking, M. J., Yokoyama, M., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: The SciBooNE and MiniBooNE collaborations report the results of a \nu_\mu disappearance search in the \Delta m^2 region of 0.5-40 eV^2. The neutrino rate as measured by the SciBooNE tracking detectors is used to constrain the rate at the MiniBooNE Cherenkov detector in the first joint analysis of data from both collaborations. Two separate analyses of the combined data samples set 90% confidence level (CL) limits on \nu_\mu disappearance in the 0.5-40 eV^2 \Delta m^2 region, with an improvement over previous experimental constraints between 10 and 30 eV^2., Comment: 10 pages, 9 figures. Re-submitted to Phys. Rev. D
Published: 2011
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15. Measurement of Neutrino-Induced Charged-Current Charged Pion Production Cross Sections on Mineral Oil at E$_{\nu}\sim 1~\textrm{GeV}$

Author: Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Dharmapalan, R., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Grange, J., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Mousseau, J., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R. G., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: Using a high-statistics, high-purity sample of $\nu_\mu$-induced charged current, charged pion events in mineral oil (CH$_2$), MiniBooNE reports a collection of interaction cross sections for this process. This includes measurements of the CC$\pi^+$ cross section as a function of neutrino energy, as well as flux-averaged single- and double-differential cross sections of the energy and direction of both the final-state muon and pion. In addition, each of the single-differential cross sections are extracted as a function of neutrino energy to decouple the shape of the MiniBooNE energy spectrum from the results. In many cases, these cross sections are the first time such quantities have been measured on a nuclear target and in the 1 GeV energy range., Comment: 29 pages and 28 figures
Published: 2010
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16. Measurement of $\nu_\mu$-induced charged-current neutral pion production cross sections on mineral oil at $E_\nu\in0.5-2.0$ GeV

Author: Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Dharmapalan, R., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Grange, J., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Mousseau, J., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., VandeWater, R. G., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: Using a custom 3 \v{C}erenkov-ring fitter, we report cross sections for $\nu_\mu$-induced charged-current single $\pi^0$ production on mineral oil (\chtwo) from a sample of 5810 candidate events with 57% signal purity over an energy range of $0.5-2.0$GeV. This includes measurements of the absolute total cross section as a function of neutrino energy, and flux-averaged differential cross sections measured in terms of $Q^2$, $\mu^-$ kinematics, and $\pi^0$ kinematics. The sample yields a flux-averaged total cross section of $(9.2\pm0.3_{stat.}\pm1.5_{syst.})\times10^{-39}$cm$^2$/CH$_2$ at mean neutrino energy of 0.965GeV., Comment: 21 pages, 14 figures, and 11 tables
Published: 2010
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17. First Measurement of the Muon Neutrino Charged Current Quasielastic Double Differential Cross Section

Author: MiniBooNE Collaboration, Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Grange, J., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Mousseau, J., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R. G., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: A high-statistics sample of charged-current muon neutrino scattering events collected with the MiniBooNE experiment is analyzed to extract the first measurement of the double differential cross section ($\frac{d^2\sigma}{dT_\mu d\cos\theta_\mu}$) for charged-current quasielastic (CCQE) scattering on carbon. This result features minimal model dependence and provides the most complete information on this process to date. With the assumption of CCQE scattering, the absolute cross section as a function of neutrino energy ($\sigma[E_\nu]$) and the single differential cross section ($\frac{d\sigma}{dQ^2}$) are extracted to facilitate comparison with previous measurements. These quantities may be used to characterize an effective axial-vector form factor of the nucleon and to improve the modeling of low-energy neutrino interactions on nuclear targets. The results are relevant for experiments searching for neutrino oscillations., Comment: 22 pages, 16 figures, published in Physical Review D, latest version to reflect changes in PRD editing
Published: 2010
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18. Measurement of \nu_\mu and \bar\nu_\mu induced neutral current single $\pi^0$ production cross sections on mineral oil at E_\nu O(1 GeV)

Author: The MiniBooNE Collaboration, Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Gonzales, J., Grange, J., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Mauger, C., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Mousseau, J., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R. G., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: MiniBooNE reports the first absolute cross sections for neutral current single \pi^0 production on CH_2 induced by neutrino and antineutrino interactions measured from the largest sets of NC \pi^0 events collected to date. The principal result consists of differential cross sections measured as functions of \pi^0 momentum and \pi^0 angle averaged over the neutrino flux at MiniBooNE. We find total cross sections of (4.76+/-0.05_{stat}+/-0.76_{sys})*10^{-40} cm^2/nucleon at a mean energy of =808 MeV and (1.48+/-0.05_{stat}+/-0.23_{sys})*10^{-40} cm^2/nucleon at a mean energy of =664 MeV for \nu_\mu and \bar\nu_\mu induced production, respectively. In addition, we have included measurements of the neutrino and antineutrino total cross sections for incoherent exclusive NC 1\pi^0 production corrected for the effects of final state interactions to compare to prior results., Comment: 13 pages, 12 figures, 4 tables
Published: 2009
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19. Measurement of the \nu_\mu charged current \pi^+ to quasi-elastic cross section ratio on mineral oil in a 0.8 GeV neutrino beam

Author: Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Buge, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., McGary, V. T., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Nelson, R. H., Nienaber, P., Nowak, J. A., Osmanov, B., Ouedraogo, S., Patterson, R. B., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Spitz, J., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: Using high statistics samples of charged current $\nu_\mu$ interactions, MiniBooNE reports a measurement of the single charged pion production to quasi-elastic cross section ratio on mineral oil (CH$_2$), both with and without corrections for hadron re-interactions in the target nucleus. The result is provided as a function of neutrino energy in the range 0.4 GeV $< E_\nu <$ 2.4 GeV with 11% precision in the region of highest statistics. The results are consistent with previous measurements and the prediction from historical neutrino calculations., Comment: 4 pages, 2 figures
Published: 2009
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20. First Measurement of $\nu_\mu$ and $\nu_e$ Events in an Off-Axis Horn-Focused Neutrino Beam

Author: Adamson, P., Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Bishai, M., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Choudhary, B. C., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Gallagher, H. R., Garcia, F. G., Garvey, G. T., Green, C., Green, J. A., Harris, D., Hart, T. L., Hawker, E., Hylen, J., Imlay, R., Johnson, R. A., Karagiorgi, G., Kasper, P., Katori, T., Kobilarcik, T., Kopp, S., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Loiacono, L., Louis, W. C., Marchionni, A., Mahn, K. B. M., Marsh, W., McGregor, G., Messier, M. D., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Nelson, J. K., Nelson, R. H., Nguyen, V. T., Nienaber, P., Nowak, J. A., Ouedraogo, S., Patterson, R. B., Pavlovic, Z., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smart, W., Smith, D., Sodeberg, M., Sorel, M., Spentzouris, P., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Vahle, P., Van de Water, R., Viren, B., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Yumiceva, F. X., Zeller, G. P., Zimmerman, E. D., and Zwaska, R.
Subjects: High Energy Physics - Experiment
Abstract: We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beamline at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle ($6.3^{\circ}$) with respect to the NuMI beam axis. Samples of charged current quasi-elastic $\nu_{\mu}$ and $\nu_e$ interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam., Comment: 4 pages, 5 figures, Submitted to Phys. Rev. Lett
Published: 2008
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21. First Observation of Coherent $\pi^0$ Production in Neutrino Nucleus Interactions with $E_{\nu}<$ 2 GeV

Author: The MiniBooNE Collaboration, Aguilar-Arevalo, A. A., Anderson, C. E., Bazarko, A. O., Brice, S. J., Brown, B. C., Bugel, L., Cao, J., Coney, L., Conrad, J. M., Cox, D. C., Curioni, A., Djurcic, Z., Finley, D. A., Fleming, B. T., Ford, R., Garcia, F. G., Garvey, G. T., Green, C., Green, J. A., Hart, T. L., Hawker, E., Imlay, R., Johnson, R. A., Karagiori, G., Kasper, P., Katori, T., Kobilarcik, T., Kourbanis, I., Koutsoliotas, S., Laird, E. M., Linden, S. K., Link, J. M., Liu, Y., Louis, W. C., Mahn, K. B. M., Marsh, W., Martin, P. S., McGregor, G., Metcalf, W., Meyers, P. D., Mills, F., Mills, G. B., Monroe, J., Moore, C. D., Nelson, R. H., Nguyen, V. T., Nienaber, P., Nowak, J. A., Ouedraogo, S., Patterson, R. B., Perevalov, D., Polly, C. C., Prebys, E., Raaf, J. L., Ray, H., Roe, B. P., Russell, A. D., Sandberg, V., Schirato, R., Schmitz, D., Shaevitz, M. H., Shoemaker, F. C., Smith, D., Soderberg, M., Sorel, M., Spentzouris, P., Stancu, I., Stefanski, R. J., Sung, M., Tanaka, H. A., Tayloe, R., Tzanov, M., Van de Water, R., Wascko, M. O., White, D. H., Wilking, M. J., Yang, H. J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: The MiniBooNE experiment at Fermilab has amassed the largest sample to date of $\pi^0$s produced in neutral current (NC) neutrino-nucleus interactions at low energy. This paper reports a measurement of the momentum distribution of $\pi^0$s produced in mineral oil (CH$_2$) and the first observation of coherent $\pi^0$ production below 2 GeV. In the forward direction, the yield of events observed above the expectation for resonant production is attributed primarily to coherent production off carbon, but may also include a small contribution from diffractive production on hydrogen. Integrated over the MiniBooNE neutrino flux, the sum of the NC coherent and diffractive modes is found to be (19.5 $\pm$1.1 (stat) $\pm$2.5 (sys))% of all exclusive NC $\pi^0$ production at MiniBooNE. These measurements are of immediate utility because they quantify an important background to MiniBooNE's search for $\nu_{\mu} \to \nu_e$ oscillations., Comment: Submitted to Phys. Lett. B
Published: 2008
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22. Phototube tests in the MiniBooNE experiment

Author: Bazarko, Andrew O.
Subjects: Physics - Instrumentation and Detectors
Abstract: The MiniBooNE neutrino oscillation experiment at Fermilab uses 1520 8-inch PMTs: 1197 PMTs are Hamamatsu model R1408 and the rest are model R5912. All of the PMTs were tested to qualify for inclusion in the detector, sorted according to their charge and time resolutions and dark rates. Seven PMTs underwent additional low light level tests. The relative detection efficiency as a function of incident angle for seven additional PMTs was measured. Procedures and results are presented., Comment: 4 pages, 7 figures. Presented at Beaune 2005: 4th International Conference on New Developments in Photodetection, Beaune, France, 19-24 June 2005
Published: 2005
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23. Physics at a Fermilab Proton Driver

Author: Albrow, M. G., Antusch, S., Babu, K. S., Barnes, T., Bazarko, A. O., Bernstein, R. H., Bowles, T. J., Brice, S. J., Ceccucci, A., Cei, F., KCheung, H. W., Christian, D. C., Collar, J. I., Cooper, J., Cooper, P. S., Curioni, A., deGouvea, A., DeJongh, F., Derwent, P. F., Diwan, M. V., Dobrescu, B. A., Feldman, G. J., Finley, D. A., Fleming, B. T., Geer, S., Greene, G. L., Grossman, Y., Harris, D. A., Horowitz, C. J., Hertzog, D. W., Huber, P., Imazato, J., Jansson, A., Jungmann, K. P., Kasper, P. A., Kersten, J., Kettell, S. H., Kuno, Y., Lindner, M., Mandelkern, M., Marciano, W. J., Melnitchouk, W., Mena, O., Michael, D. G., Miller, J. P., Mills, G. B., Morfin, J. G., and Nguyen, H.
Subjects: High Energy Physics - Experiment
Abstract: This report documents the physics case for building a 2 MW, 8 GeV superconducting linac proton driver at Fermilab., Comment: 52 pages, 15 figures
Published: 2005

24. Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP

Author: Schael, S, Barate, R, Brunelière, R, Buskulic, D, De Bonis, I, Decamp, D, Ghez, P, Goy, C, Jézéquel, S, Lees, JP, Lucotte, A, Martin, F, Merle, E, Minard, MN, Nief, JY, Odier, P, Pietrzyk, B, Trocmé, B, Bravo, S, Casado, MP, Chmeissani, M, Comas, P, Crespo, JM, Fernandez, E, Fernandez-Bosman, M, Garrido, L, Grauges, E, Juste, A, Martinez, M, Merino, G, Miquel, R, Mir, LM, Orteu, S, Pacheco, A, Park, IC, Perlas, J, Riu, I, Ruiz, H, Sanchez, F, Colaleo, A, Creanza, D, De Filippis, N, de Palma, M, Iaselli, G, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Bazarko, A, Becker, U, Boix, G, Bird, F, Blucher, E, Bonvicini, B, Bright-Thomas, P, Barklow, T, Buchmüller, O, Cattaneo, M, Cerutti, F, Ciulli, V, Clerbaux, B, Drevermann, H, Forty, RW, Frank, M, Greening, TC, Hagelberg, R, Halley, AW, Gianotti, F, Girone, M, Hansen, JB, Harvey, J, Jacobsen, R, Hutchcroft, DE, Janot, P, Jost, B, Knobloch, J, Kado, M, Lehraus, I, Lazeyras, P, Maley, P, Mato, P, and May, J
Subjects: Electron-positron physics, Electroweak interactions, Decays of heavy intermediate gauge bosons, Fermion-antifermion production, Precision measurements at W-pair energies, Tests of the Standard Model, Radiative corrections, Effective coupling constants, Neutral weak current, Z boson, W boson, Top quark, Higgs boson, hep-ex, hep-ph, Nuclear & Particles Physics, Mathematical Sciences, Physical Sciences
Abstract: Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3fb-1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130GeV to 209GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant W W and Z Z production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron-positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose-Einstein correlations between the two W decay systems arising in W W production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B (W → had), and the trilinear gauge-boson self-couplings g1Z, κγ and λγ are determined to be: mW=80.376±0.033GeV ΓW=2.195±0.083GeV B(W→had)=67.41±0.27% g1Z=0.9840+0.018-0.020 κγ=0.982±0.042λγ=-0.022±0.019. © 2013 Elsevier B.V.
Published: 2013

25. Queen–worker aggression in the facultatively eusocial bee Megalopta genalis

Author: Smith, A. R., Simons, M., Bazarko, V., Harach, J., and Seid, M. A.
Published: 2019
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26. The influence of sociality, caste, and size on behavior in a facultatively eusocial bee

Author: Smith, A., Simons, M., Bazarko, V., and Seid, M.
Published: 2019
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27. Status of MiniBooNE

Author: Bazarko, Andrew
Subjects: High Energy Physics - Experiment
Abstract: MiniBooNE is a neutrino oscillation experiment now running at Fermilab. The experiment will search for muon neutrino to electron neutrino oscillations in order to make a conclusive statement about the yet-unconfirmed evidence for oscillations presented by the LSND experiment. Preparations for the start of running were completed over the summer of 2002, and MiniBooNE observed its first neutrino events in late August., Comment: 4 pages, 3 figures, to appear in Proceedings of the 31st International Conference on High Energy Physcis (ICHEP02) Amsterdam, 24-31 July 2002
Published: 2002
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28. Extraction of R=sigma_L/sigma_T from CCFR Neutrino and Antinetrino Differential Cross Sections

Author: Bodek, A., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., deBarbaro, L., deBarbaro, P., Bazarko, A. O., Bernstein, R. H., Bolton, T., Brau, J., and Buchholz, D.
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of R=sigam_L/sigma_T from CCFR neutrino and antineutrino-Iron differential cross sections. R as measured in neutrno scattering is in agreement with $R$ as measured in muon and electron scattering. All data on R for Q2 > 1 GeV2 are in agreement with a NNLO QCD calculation which uses NNLO PDFs and includes target mass effects. We report on the first measurements of R in the low x and Q2 < 1 GeV2 region (where an anomalous large rise in R for nuclear targets has been observed by the HERMES collaboration)., Comment: 4 pages, 1 figure. Presented by Arie Bodek for the CCFR/NuTeV collaboration at DIS2001, Bologna, April 2001 (to be published in Proceedings). UR-1635
Published: 2001

29. Extraction of R = sigma_L/sigma_T from CCFR nu_mu-Fe and nubar_mu-Fe differential cross sections

Author: Yang, U. K., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., and Bodek, A.
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of R=sigma_L/sigma_T from CCFR nu_mu-Fe and nubar_mu-Fe differential cross sections. The CCFR differential cross sections do not show the deviations from the QCD expectations that are seen in the CDHSW data at very low and very high x. R as measured in nu_mu scattering is in agreement with R as measured in muon and electron scattering. All data on R for Q^2 > 1 GeV^2 are in agreement with a NNLO QCD calculation which includes target mass effects. We report on the first measurements of R in the low x and Q^2 < 1 GeV^2 region (where an anomalous large rise in R for nuclear targets has been observed by the HERMES collaboration)., Comment: 4 pages, 4 figures, submitted to Phys. Rev. Lett
Published: 2001
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30. Recent structure function results from neutrino scattering at Fermilab

Author: Yang, U. K., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., and al, A. Bodek et
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of the structure functions F_2 and Delta xF_3 = xF_3(nu)-xF_3(nubar) from CCFR nu_mu-Fe and nubar_mu-Fe different ial cross sections. The extraction is performed in a physics model independent (PMI) way. This first measurement of Delta xF_3, which is useful in testing models of heavy charm production, is higher than current theoretical predictios. The ratio of the F_2 (PMI) values measured in nu_mu and mu scattering is in agreement (within 5%) with the NLO predictions using massive charm production schemes, thus resolving the long-standing discrepancy between the two sets of data. In addition, measurements of F_L (or, equivalently, R) and 2xF_1 are reported in the kinematic region where anomalous nuclear effects in R are observed at HERMES., Comment: 3 pages, 3 figures, To be published in proceedings of the XXXth International Conferencee on High Energy Physics,Osaka, Japan, July, 2000
Published: 2000

31. New Measurements of Nucleon Structure Functions from CCFR/NuTeV

Author: Bodek, A., Yang, U. K., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., Bolton, T., Brau, J., Buchholz, D., Budd, H., Bugel, L., Conrad, J., Drucker, R. B., Fleming, B. T., Formaggio, J. A., Frey, R., Goldman, J., Goncharov, M., Harris, D. A., Johnson, R. A., Kim, J. H., King, B. J., Kinnel, T., Koutsoliotas, S., Lamm, M. J., Marsh, W., Mason, D., and McFarland, K. S.
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of the structure functions F_2 and Delta xF_3 = xF_3nu-xF_3nub from CCFR neutrino-Fe and antineutrino-Fe differential cross sections. The extraction is performed in a physics model independent (PMI) way. This first measurement for Delta xF_3, which is useful in testing models of heavy charm production, is higher than current theoretical predictions. Within 5% the F_2 (PMI) values measured in neutrino and muon scattering are in agreement with the predictions of Next-to-Leading-Order PDFs (using massive charm production schemes), thus resolving the long-standing discrepancy between the two measurements., Comment: 3 pages, Presented by Arie Bodek at DPF2000 Conference, Columbus, Ohio, Aug. 2000
Published: 2000
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32. MiniBooNE: Status of the Booster Neutrino Experiment

Author: Bazarko, Andrew
Subjects: High Energy Physics - Experiment
Abstract: MiniBooNE is preparing to search for nu_mu to nu_e oscillations at Fermilab. The experiment is designed to make a conclusive statement about LSND's neutrino oscillation evidence. We give a status report on the preparation of the experiment and outline the experimental prospects., Comment: 6 pages, To appear in Proceedings of the XIX International Conference on Neutrino Physics and Astrophysics (Neutrino 2000), Sudbury. Canada, 16-21 June 2000
Published: 2000
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33. New Measurements of Nucleon Structure Functions from the CCFR/NuTeV Collaboration

Author: Bodek, A., Yang, U. K., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., Bolton, T., Brau, J., Buchholz, D., Budd, H., Bugel, L., Conrad, J., Drucker, R. B., Fleming, B. T., Formaggio, J. A., Frey, R., Goldman, J., Goncharov, M., Harris, D. A., Johnson, R. A., Kim, J. H., King, B. J., Kinnel, T., Koutsoliotas, S., Lamm, M. J., Marsh, W., Mason, D., and McFarland, K. S.
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of the structure functions F_2 and Delta xF_3 = xF_3nu-xF_3nubar from CCFR neutrino-Fe and antineutrino-Fe differential cross sections. The extraction is performed in a physics model independent (PMI) way. This first measurement for Delta xF_3, which is useful in testing models of heavy charm production, is higher than current theoretical predictions. The F_2 (PMI) values measured in neutrino and muon scattering are in good agreement with the predictions of Next to Leading Order PDFs (using massive charm production schemes), thus resolving the long-standing discrepancy between the two sets of data., Comment: 5 pages. Presented by Arie Bodek at the CIPNAP2000 Conference, Quebec City, May 2000
Published: 2000
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34. Measurements of F2, xF3nu-xF3nub from CCFR neutrino-Fe and antineutrino-Fe data in a model independent way

Author: Bodek, A., Yang, U. K., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., deBarbaro, L., deBarbaro, P., Bazarko, A. O., Bernstein, R. H., Bolton, T., Brau, J., Buchholz, D., Budd, H., Bugel, L., Conrad, J., Drucker, R. B., and Fleming, B. T.
Subjects: High Energy Physics - Experiment
Abstract: We report on the extraction of the structure functions F2 and Delta xF3 = xF3nu-xF3nub from CCFR neutrino-Fe and antineutrino-Fe differential cross sections. The extraction is performed in a physics model independent (PMI) way. This first measurement for Delta xF3 which is useful in testing models of heavy charm production, is higher than current theoretical predictions. The F2 (PMI) values measured in neutrino and muon scattering are in good agreement with the predictions of Next to Leading Order PDFs (using massive charm production schemes), thus resolving the long-standing discrepancy between the two sets of data., Comment: to be published in proceedings of QCD Moriond, 2000. 4 pages
Published: 2000

35. Low Q^2 low x structure function analysis of CCFR data for F2

Author: CCFR Collaboration, Tamminga, B. H., Adams, T., Alton, A., Arroyo, C. G., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., Bodek, A., Bolton, T., Brau, J., Buchholz, D., Budd, H., Bugel, L., Conrad, J., Drucker, R. B., Formaggio, J. A., Frey, R., Goldman, J., Goncharov, M., Harris, D. A., Johnson, R. A., Kim, J. H., King, B. J., Kinnel, T., Koutsoliotas, S., Lamm, M. J., Marsh, W., Mason, D., McFarland, K. S., McNulty, C., Mishra, S. R., Naples, D., Nienaber, P., Romosan, A., Sakumoto, W. K., Schellman, H., Sciulli, F. J., Seligman, W. G., Shaevitz, M. H., Smith, W. H., Spentzouris, P., Stern, E. G., Vakili, M., Vaitaitis, A., Wu, V., Yang, U. K., Yu, J., Zeller, G. P., and Zimmerman, E. D.
Subjects: High Energy Physics - Experiment
Abstract: Analyses of structure functions (SFs) from neutrino and muon deep inelastic scattering data have shown discrepancies in F2 for x < 0.1. A new SF analysis of the CCFR collaboration data examining regions in x down to x=.0015 and 0.4 < Q^2 < 1.0 is presented. Comparison to corrected charged lepton scattering results for F2 from the NMC and E665 experiments are made. Differences between muon and neutrino scattering allow that the behavior of F2 from muon scattering could be different from F2 from neutrino scattering as Q^2 approaches zero. Comparisons between F2 muon and F2 neutrino are made in this limit., Comment: 5 pages, 1 figure, to be published in proceedings for PANIC99
Published: 1999
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36. MiniBooNE: the Booster Neutrino Experiment

Author: Bazarko, Andrew O.
Subjects: High Energy Physics - Experiment
Abstract: The Booster Neutrino Experiment at Fermilab is preparing to search for muon to electron neutrino oscillations. The experiment is designed to make a conclusive statement about LSND's neutrino oscillation evidence. The experimental prospects are outlined in light of the current results from LSND and KARMEN., Comment: Presented at DPF'99, Los Angeles, January 1999. 5 pages, 3 figures
Published: 1999

37. Nuclear Structure Functions in the Large x Large Q^2 Kinematic Region in Neutrino Deep Inelastic Scattering

Author: CCFR collaboration, Vakili, M., Arroyo, C. G., Auchincloss, P., de Barbaro, P., Bazarko, A. O., Bernstein, R. H., Bodek, A., Bolton, T., Budd, H., Conrad, J., de Barbaro, L., Harris, D. A., Johnson, R. A., Kim, J. H., King, B. J., Kinnel, T., Koizumi, G., Koutsoliotas, S., Lamm, M. J., Lefmann, W. C., Marsh, W., McFarland, K. S., McNulty, C., Mishra, S. R., Naples, D., Nienaber, P., Oreglia, M. J., Perera, L., Quintas, P. Z., Romosan, A., Sakumoto, W. K., Schumm, B. A., Sciulli, F. J., Seligman, W. G., Shaevitz, M. H., Smith, W. H., Spentzouris, P., Steiner, R., Stern, E. G., Yang, U. K., and Yu, J.
Subjects: High Energy Physics - Experiment
Abstract: Data from the CCFR E770 Neutrino Deep Inelastic Scattering (DIS) experiment at Fermilab contain events with large Bjorken x (x>0.7) and high momentum transfer (Q^2>50 (GeV/c)^2). A comparison of the data with a model based on no nuclear effects at large x, shows a significant excess of events in the data. Addition of Fermi gas motion of the nucleons in the nucleus to the model does not explain the excess. Adding a higher momentum tail due to the formation of ``quasi-deuterons'' makes some improvement. An exponentially falling F_2 \propto e^-s(x-x_0) at large x, predicted by ``multi-quark clusters'' and ``few-nucleon correlations'', can describe the data. A value of s=8.3 \pm 0.7(stat.)\pm 0.7(sys.) yields the best agreement with the data., Comment: 4 pages, 4 figures, 1 table. Sibmitted to PRL
Published: 1999
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38. Measurements of the longitudinal structure function and |V_cs| in the CCFR experiment

Author: Collaboration, CCFR/NuTeV, Yang, U. K., McNulty, C., Arroyo, C. G., deBarbaro, L., deBarbaro, P., Bazarko, A. O., Bernstein, R. H., Bodek, A., Bolton, T., Budd, H., Conrad, J., Harris, D. A., Johnson, R. A., Kim, J. H., King, B. J., Kinnel, T., Lamm, M. J., Lefmann, W. C., Marsh, W., McFarland, K. S., Mishra, S. R., Naples, D., Quintas, P. Z., Romosan, A., Sakumoto, W. K., Schellman, H., Sciulli, F. J., Seligman, W. G., Shaevitz, M. H., Smith, W. H., Spentzouris, P., Stern, E. G., Vakili, M., and Yu, J.
Subjects: High Energy Physics - Experiment
Abstract: Measurements of charged current neutrino and anti-neutrino nucleon interactions in the CCFR detector are used to extract the structure functions, F_2, xF_3(nu), xF_3(nubar) and R(longitudinal) in the kinematic region 0.01
Published: 1998

39. A Measurement of $R_b$ Using Multiple Tags

Author: Bazarko, Andrew O.
Subjects: High Energy Physics - Experiment
Abstract: A new measurement of $R_b$ with the ALEPH detector at LEP using five mutually exclusive hemisphere tags is presented. The preliminary result is $R_b = 0.2158 \pm 0.0009 (stat.) \pm 0.0011 (syst.)$., Comment: 5 pages
Published: 1996

40. Physics at a Fermilab Proton Driver

Author: Albrow, MG, Antusch, S, Babu, KS, Barnes, T, Bazarko, AO, Bernstein, RH, Bowles, TJ, Brice, SJ, Ceccucci, A, Cei, F, KCheung, HW, Christian, DC, Collar, JI, Cooper, J, Cooper, PS, Curioni, A, deGouvea, A, DeJongh, F, Derwent, PF, Diwan, MV, Dobrescu, BA, Feldman, GJ, Finley, DA, Fleming, BT, Geer, S, Greene, GL, Grossman, Y, Harris, DA, Horowitz, CJ, Hertzog, DW, Huber, P, Imazato, J, Jansson, A, Jungmann, KP, Kasper, PA, Kersten, J, Kettell, SH, Kuno, Y, Lindner, M, Mandelkern, M, Marciano, WJ, Melnitchouk, W, Mena, O, Michael, DG, Miller, JP, Mills, GB, Morfin, JG, and Nguyen, H
Subjects: hep-ex
Abstract: This report documents the physics case for building a 2 MW, 8 GeVsuperconducting linac proton driver at Fermilab.
Published: 2005

41. Determination of the Strange Quark Content of the Nucleon from a Next-to-Leading-Order QCD Analysis of Neutrino Charm Production

Author: Bazarko, A. O.
Subjects: High Energy Physics - Experiment
Abstract: We present the first next-to-leading-order QCD analysis of neutrino charm production, using a sample of 6090 $\nu_\mu$- and $\bar\nu_\mu$-induced opposite-sign dimuon events observed in the CCFR detector at the Fermilab Tevatron. We find that the nucleon strange quark content is suppressed with respect to the non-strange sea quarks by a factor $\kappa = 0.477 \: ^{+\:0.063}_{-\:0.053}$, where the error includes statistical, systematic and QCD scale uncertainties. In contrast to previous leading order analyses, we find that the strange sea $x$-dependence is similar to that of the non-strange sea, and that the measured charm quark mass, $m_c = 1.70 \pm 0.19 \:{\rm GeV/c}^2$, is larger and consistent with that determined in other processes. Further analysis finds that the difference in $x$-distributions between $xs(x)$ and $x\bar s(x)$ is small. A measurement of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cd}|=0.232 ^{+\:0.018}_{-\:0.020}$ is also presented. uufile containing compressed postscript files of five Figures is appended at the end of the LaTeX source., Comment: Nevis R#1502
Published: 1994
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42. Small Aperture Telescopes for the Simons Observatory

Author: Aamir M. Ali, Shunsuke Adachi, Kam Arnold, Peter Ashton, Andrew Bazarko, Yuji Chinone, Gabriele Coppi, Lance Corbett, KevinD Crowley, Kevin T Crowley, Mark Devlin, Simon Dicker, Shannon Duff, Chris Ellis, Nicholas Galitzki, Neil Goeckner-Wald, Kathleen Harrington, Erin Healy, Charles A Hill, Shuay-Pwu Patty Ho, Johannes Hubmayr, Brian Keating, Kenji Kiuchi, Akito Kusaka, Adrian T Lee, Michael Ludlam, Aashrita Mangu, Frederick Matsuda, Heather McCarrick, Federico Nati, Michael D. Niemack, Haruki Nishino, John Orlowski-Scherer, MayuriSathyanarayana Rao, Christopher Raum, YukiSakurai, Maria Salatino, Trevor Sasse, Joseph Seibert, Carlos Sierra, Maximiliano Silva-Feaver, Jacob Spisak, Sara M Simon, Suzanne Staggs, Osamu Tajima, ·Grant Teply, Tran Tsan, Edward Wollack, Bejamin Westbrook, Zhilei Xu, Mario Zannoni, and Ningfeng Zhu
Subjects: Instrumentation And Photography
Abstract: The Simons Observatory (SO) is an upcoming cosmic microwave background(CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in temperature and polarization in six frequency bands spanning 27 to 285 GHz. SO will consist of one 6-meter Large Aperture Telescope (LAT) fielding∼30,000 detectors and an array of three 0.42-meter Small Aperture Telescopes (SATs) fielding an additional 30,000 detectors. This synergy will allow for the extremely sensitive characterization of the CMB over an-gular scales ranging from an arcmin to tens of degrees, enabling a wide range of scientific output. Here we focus on the SATs targeting degree angular scales with successive dichroic instruments observing at Mid-Frequency (MF: 93/145 GHz), Ultra-High-Frequency (UHF:225/285 GHz), and Low-Frequency (LF: 27/39 GHz). The three SATs will be able to map∼10% of the sky to a noise level of∼2 μK-arcmin when combining 93 and 145 GHz. The multiple frequency bands will allow the CMB to be separated from galactic foregrounds (primarily synchrotron and dust), with the primary science goal of characterizing the primordial tensor-to-scalar ratio, r, at a target level ofσ(r)≈0.003.
Published: 2020
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43. A precision measurement of electroweak parameters in neutrino-nucleon scattering

Author: McFarland, KS, Arroyo, CG, King, BJ, De Barbaro, L, De Barbaro, P, Bazarko, AO, Bernstein, RH, Bodek, A, Bolton, T, Budd, H, Bugel, L, Conrad, J, Drucker, RB, Harris, DA, Johnson, RA, Kim, JH, Kinnel, T, Lamm, MJ, Lefmann, WC, Marsh, W, McNulty, C, Mishra, SR, Naples, D, Quintas, PZ, Romosan, A, Sakumoto, WK, Schellman, H, Sciulli, FJ, Seligman, WG, Shaevitz, MH, Smith, WH, Spentzouris, P, Stern, EG, Vakili, M, Yang, UK, Yu, J, and Zeller, GP
Subjects: Nuclear & Particles Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: The CCFR collaboration reports a precise measurement of electroweak parameters derived from the ratio of neutral-current to charged-current cross-sections in neutrino-nucleon scattering at the Fermilab Tevatron. We determine sin2 θ(on-shell)W = 0.2236 ± 0.0028 (expt.) ± 0.0030 (model) for Mtop = 175 GeV, MHiggs = 150 GeV. This is equivalent to MW = 80.35 ± 0.21 GeV. The good agreement of this measurement with Standard Model expectations implies the exclusion of additional vvqq contact interactions at 95% confidence at a mass scale of 1-8 TeV, depending on the form of the contact interaction.
Published: 1998

44. Study on efficient removal of anionic, cationic and nonionic dyes from aqueous solutions by means of mesoporous carbon nanospheres with empty cavity

Author: Konicki, Wojciech, Cendrowski, Krzysztof, Bazarko, Grzegorz, and Mijowska, Ewa
Published: 2015
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45. Astro2020 APC White Paper Project: The Simons Observatory

Author: Abitbol, Maximilian H, Adachi, Shunsuke, Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A, Arnold, Kam, Ashton, Peter, Atkins, Zachary, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Lizancos, Anton Baleato, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A, Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bhandarkar, Tanay, Bhimani, Sanah, Bianchini, Federico, Boada, Steven, Boettger, David, Bolliet, Boris, Bond, J. Richard, Borrill, Julian, Brown, Michael L, Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Carl, Fred. M, Cayuso, Juan, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Clark, Susan, Clarke, Philip, Contaldi, Carlo, Coppi, Gabriele, Cothard, Nicholas F, Coughlin, Kevin, Coulton, Will, Crichton, Devin, Crowley, Kevin D, Crowley, Kevin T, Cukierman, Ari, D’Ewart, John M, D¨unner, Rolando, Haan, Tijmen de, Devlin, Mark, Dicker, Simon, Dober, Bradley, Duell, Cody J, Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Bouhargani, Hamza El, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Fergusson, James, Ferraro, Simone, Flux`a, Pedro, Freese, Katherine, Frisch, Josef C, Frolov, Andrei, Fuller, George, Galitzki, Nicholas, Gallardo, Patricio A, Ghersi, Jose Tomas Galvez, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, Gudmundsson, Jon E, Halpern, Mark, Han, Dongwon, Hargrave, Peter, Harrington, Kathleen, Hasegawa, Masaya, Hasselfield, Matthew, Hattori, Makoto, Haynes, Victor, Hazumi, Masashi, Healy, Erin, Henderson, Shawn W, Hensley, Brandon, Hervias-Caimapo, Carlos, Hill, Charles A, Hill, J. Colin, Hilton, Gene, Hilton, Matt, Hincks, Adam D, Hinshaw, Gary, Hlozek, Renee, Ho, Shirley, Ho, Shuay-Pwu Patty, Hoang, Thuong D, Hoh, Jonathan, Hotinli, Selim C, Huang, Zhiqi, Hubmayr, Johannes, Huffenberger, Kevin, Hughes, John P, Ijjas, Anna, Ikape, Margaret, Irwin, Kent, Jaffe, Andrew H, Jain, Bhuvnesh, Jeong, Oliver, Johnson, Matthew, Kaneko, Daisuke, Karpel, Ethan D, Katayama, Nobuhiko, Keating, Brian, Keskitalo, Reijo, Kisner, Theodore, Kiuchi, Kenji, Klein, Jeff, Knowles, Kenda, Kofman, Anna, Koopman, Brian, Kosowsky, Arthur, Krachmalnicoff, Nicoletta, Kusaka, Akito, LaPlante, Phil, Lashner, Jacob, Lee, Adrian, Lee, Eunseong, Lewis, Antony, Li, Yaqiong, Li, Zack, Limon, Michele, Linder, Eric, Liu, Jia, Lopez-Caraballo, Carlos, Louis, Thibaut, Lungu, Marius, Madhavacheril, Mathew, Mak, Daisy, Maldonado, Felipe, Mani, Hamdi, Mates, Ben, Matsuda, Frederick, Maurin, Loıc, Mauskopf, Phil, May, Andrew, McCallum, Nialh, McCarrick, Heather, McKenney, Chris, McMahon, Jeff, Meerburg, P. Daniel, Mertens, James, Meyers, Joel, Miller, Amber, Mirmelstein, Mark, Moodley, Kavilan, Moore, Jenna, Munchmeyer, Moritz, Munson, Charles, Murata, Masaaki, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Navaroli, Martin, Newburgh, Laura, Nguyen, Ho Nam, Nicola, Andrina, Niemack, Mike, Nishino, Haruki, Nishinomiya, Yume, Orlowski-Scherer, John, Pagano, Luca, Partridge, Bruce, Perrotta, Francesca, Phakathi, Phumlani, Piccirillo, Lucio, Pierpaoli, Elena, Pisano, Giampaolo, Poletti, Davide, Puddu, Roberto, Puglisi, Giuseppe, Raum, Chris, Reichardt, Christian L, Remazeilles, Mathieu, Rephaeli, Yoel, Riechers, Dominik, Rojas, Felipe, Rotti, Aditya, Roy, Anirban, Sadeh, Sharon, Sakurai, Yuki, Salatino, Maria, Rao, Mayuri Sathyanarayana, Saunders, Lauren, Schaan, Emmanuel, Schmittfull, Marcel, Sehgal, Neelima, Seibert, Joseph, Seljak, Uros, Shellard, Paul, Sherwin, Blake, Shimon, Meir, Sierra, Carlos, Sievers, Jonathan, Sifon, Cristobal, Sikhosana, Precious, Silva-Feaver, Maximiliano, Simon, Sara M, Sinclair, Adrian, Smith, Kendrick, Sohn, Wuhyun, Sonka, Rita, Spergel, David, Spisak, Jacob, Staggs, Suzanne T, Stein, George, Stevens, Jason R, Stompor, Radek, Suzuki, Aritoki, Tajima, Osamu, Takakura, Satoru, Teply, Grant, Thomas, Daniel B, Thorne, Ben, Thornton, Robert, Trac, Hy, Treu, Jesse, Tsai, Calvin, Tucker, Carole, Ullom, Joel, Vagnozzi, Sunny, Engelen, Alexander van, Lanen, Jeff Van, Winkle, Daniel D. Van, Vavagiakis, Eve M, Verg`es, Clara, Vissers, Michael, Wagoner, Kasey, Walker, Samantha, Wang, Yuhan, Ward, Jon, Westbrook, Ben, Whitehorn, Nathan, Williams, Jason, Williams, Joel, Wollack, Edward, Xu, Zhilei, Yasini, Siavash, Young, Edward, Yu, Byeonghee, Yu, Cyndia, Zago, Fernando, Zannoni, Mario, Zhang, Hezi, Zheng, Kaiwen, Zhu, Ningfeng, and Zonca, Andrea
Subjects: Astrophysics
Abstract: The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough discoveries in fundamental physics, cosmology, and astrophysics. Supported by the Simons Foundation, the Heising-Simons Foundation, and with contributions from collaborating institutions, SO will see first light in 2021 and start a five year survey in 2022. SO has 287 collaborators from 12 countries and 53 institutions, including 85 students and 90 postdocs. The SO experiment in its currently funded form (‘SO-Nominal’) consists of three 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT). Optimized for minimizing systematic errors in polarization measurements at large angular scales, the SATs will perform a deep, degree-scale survey of 10% of the sky to search for the signature of primordial gravitational waves. The LAT will survey 40% of the sky with arc-minute resolution. These observations will measure (or limit) the sum of neutrino masses, search for light relics, measure the early behavior of Dark Energy, and refine our understanding of the intergalactic medium, clusters and the role of feedback in galaxy formation. With up to ten times the sensitivity and five times the angular resolution of the Planck satellite, and roughly an order of magnitude increase in mapping speed over currently operating (“Stage 3”) experiments, SO will measure the CMB temperature and polarization fluctuations to exquisite precision in six frequency bands from 27 to 280 GHz. SO will rapidly advance CMB science while informing the design of future observatories such as CMB-S4. Construction of SO-Nominal is fully funded, and operations and data analysis are funded for part of the planned five-year observations. We will seek federal funding to complete the observations and analysis of SO-Nominal, at the $25M level. The SO has a low risk and cost efficient upgrade path – the 6 m LAT can accommodate almost twice the baseline number of detectors and the SATs can be duplicated at low cost. We will seek funding at the $75M level for an expansion of the SO (‘SO-Enhanced’) that fills the remaining focal plane in the LAT, adds three SATs, and extends operations by five years, substantially improving our science return. By this time SO may be operating as part of the larger CMB-S4 project. This white paper summarizes and extends material presented in, which describes the science goals of SO-Nominal, and which describe the instrument design.
Published: 2019

46. The Simons Observatory: science goals andforecasts

Author: Peter Ade, James Aguirre, Zeeshan Ahmed, Simone Aiola, Aamir Ali, David Alonso, Marcelo A. Alvarez, Kam Arnold, Peter Ashton, Jason Austermann, Humna Awan, Carlo Baccigalupi, Taylor Baildon, Darcy Barron, Nick Battaglia, Richard Battye, Eric Baxter, Andrew Bazarko, James A. Beall, Rachel Bean, Dominic Beck, Shawn Beckman, Benjamin Beringue, Federico Bianchini, Steven Boada, David Boettger, J. Richard Bond, Julian Borrill, Michael L. Brown, Sarah Marie Bruno, Sean Bryan, Erminia Calabrese, Victoria Calafut, Paolo Calisse, Julien Carron, Anthony Challinor, Grace Chesmore, Yuji Chinone, Jens Chluba, Hsiao-Mei Sherry Cho, Steve Choi, Gabriele Coppi, Nicholas F. Cothard, Kevin Coughlin, Devin Crichton, Kevin D. Crowley, Kevin T. Crowley, Ari Cukierman, John M. D'Ewart, Rolando Dünner, Tijmen de Haan, Mark Devlin, Simon Dicker, Joy Didier, Matt Dobbs, Bradley Dober, Cody J. Duell, Shannon Duff, Adri Duivenvoorden, Jo Dunkley, John Dusatko, Josquin Errard, Giulio Fabbian, Stephen Feeney, Simone Ferraro, Pedro Fluxà, Katherine Freese, Josef C. Frisch, Andrei Frolov, George Fuller, Brittany Fuzia, Nicholas Galitzki, Patricio A. Gallardo, Jose Tomas Galvez Ghersi, Jiansong Gao, Eric Gawiser, Martina Gerbino, Vera Gluscevic, Neil Goeckner-Wald, Joseph Golec, Sam Gordon, Megan Gralla, Daniel Green, Arpi Grigorian, John Groh, Chris Groppi, Yilun Guan, Jon E. Gudmundsson, Dongwon Han, Peter Hargrave, Masaya Hasegawa, Matthew Hasselfield, Makoto Hattori, Victor Haynes, Masashi Hazumi, Yizhou He, Erin Healy, Shawn W. Henderson, Carlos Hervias-Caimapo, Charles A. Hill, J. Colin Hill, Gene Hilton, Matt Hilton, Adam D. Hincks, Gary Hinshaw, Renée Hložek, Shirley Ho, Shuay-Pwu Patty Ho, Logan Howe, Zhiqi Huang, Johannes Hubmayr, Kevin Huffenberger, John P. Hughes, Anna Ijjas, Margaret Ikape, Kent Irwin, Andrew H. Jaffe, Bhuvnesh Jain, Oliver Jeong, Daisuke Kaneko, Ethan D. Karpel, Nobuhiko Katayama, Brian Keating, Sarah S. Kernasovskiy, Reijo Keskitalo, Theodore Kisner, Kenji Kiuchi, Jeff Klein, Kenda Knowles, Brian Koopman, Arthur Kosowsky, Nicoletta Krachmalnicoff, Stephen E. Kuenstner, Chao-Lin Kuo, Akito Kusaka, Jacob Lashner, Adrian Lee, Eunseong Lee, David Leon, Jason S.-Y. Leung, Antony Lewis, Yaqiong Li, Zack Li, Michele Limon, Eric Linder, Carlos Lopez-Caraballo, Thibaut Louis, Lindsay Lowry, Marius Lungu, Mathew Madhavacheril, Daisy Mak, Felipe Maldonado, Hamdi Mani, Ben Mates, Frederick Matsuda, Loïc Maurin, Phil Mauskopf, Andrew May, Nialh McCallum, Chris McKenney, Jeff McMahon, P. Daniel Meerburg, Joel Meyers, Amber Miller, Mark Mirmelstein, Kavilan Moodley, Moritz Munchmeyer, Charles Munson, Sigurd Naess, Federico Nati, Martin Navaroli, Laura Newburgh, Ho Nam Nguyen, Michael Niemack, Haruki Nishino, John Orlowski-Scherer, Lyman Page, Bruce Partridge, Julien Peloton, Francesca Perrotta, Lucio Piccirillo, Giampaolo Pisano, Davide Poletti, Roberto Puddu, Giuseppe Puglisi, Chris Raum, Christian L. Reichardt, Mathieu Remazeilles, Yoel Rephaeli, Dominik Riechers, Felipe Rojas, Anirban Roy, Sharon Sadeh, Yuki Sakurai, Maria Salatino, Mayuri Sathyanarayana Rao, Emmanuel Schaan, Marcel Schmittfull, Neelima Sehgal, Joseph Seibert, Uros Seljak, Blake Sherwin, Meir Shimon, Carlos Sierra, Jonathan Sievers, Precious Sikhosana, Maximiliano Silva-Feaver, Sara M. Simon, Adrian Sinclair, Praween Siritanasak, Kendrick Smith, Stephen R. Smith, David Spergel, Suzanne T. Staggs, George Stein, Jason R. Stevens, Radek Stompor, Aritoki Suzuki, Osamu Tajima, Satoru Takakura, Grant Teply, Daniel B. Thomas, Ben Thorne, Robert Thornton, Hy Trac, Calvin Tsai, Carole Tucker, Joel Ullom, Sunny Vagnozzi, Alexander van Engelen, Jeff Van Lanen, Daniel D. Van Winkle, Eve M. Vavagiakis, Clara Vergès, Michael Vissers, Kasey Wagoner, Samantha Walker, Jon Ward, Ben Westbrook, Nathan Whitehorn, Jason Williams, Joel Williams, Edward J. Wollack, Zhilei Xu, Byeonghee Yu, Cyndia Yu, Fernando Zago, Hezi Zhang, and Ningfeng Zhu
Subjects: Astrophysics, Astronomy
Abstract: The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping ≈ 10% of the sky to a white noise level of 2 μK-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of σ(r)=0.003. The large aperture telescope will map ≈ 40% of the sky at arcminute angular resolution to an expected white noise level of 6 μK-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.
Published: 2019
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47. The Simons Observatory: metamaterial microwave absorber and its cryogenic applications

Author: Xu, Z, Chesmore, G, Adachi, S, Ali, A, Bazarko, A, Coppi, G, Devlin, M, Devlin, T, Dicker, S, Gallardo, P, Golec, J, Gudmundsson, J, Harrington, K, Hattori, M, Kofman, A, Kiuchi, K, Kusaka, A, Limon, M, Matsuda, F, Mcmahon, J, Nati, F, Niemack, M, Suzuki, A, Teply, G, Thornton, R, Wollack, E, Zannoni, M, Zhu, N, Xu, Zhilei, Chesmore, Grace E., Adachi, Shunsuke, Ali, Aamir M., Bazarko, Andrew, Coppi, Gabriele, Devlin, Mark, Devlin, Tom, Dicker, Simon R., Gallardo, Patricio A., Golec, Joseph E., Gudmundsson, Jon E., Harrington, Kathleen, Hattori, Makoto, Kofman, Anna, Kiuchi, Kenji, Kusaka, Akito, Limon, Michele, Matsuda, Frederick, McMahon, Jeff, Nati, Federico, Niemack, Michael D., Suzuki, Aritoki, Teply, Grant P., Thornton, Robert J., Wollack, Edward J., Zannoni, Mario, Zhu, Ningfeng, Xu, Z, Chesmore, G, Adachi, S, Ali, A, Bazarko, A, Coppi, G, Devlin, M, Devlin, T, Dicker, S, Gallardo, P, Golec, J, Gudmundsson, J, Harrington, K, Hattori, M, Kofman, A, Kiuchi, K, Kusaka, A, Limon, M, Matsuda, F, Mcmahon, J, Nati, F, Niemack, M, Suzuki, A, Teply, G, Thornton, R, Wollack, E, Zannoni, M, Zhu, N, Xu, Zhilei, Chesmore, Grace E., Adachi, Shunsuke, Ali, Aamir M., Bazarko, Andrew, Coppi, Gabriele, Devlin, Mark, Devlin, Tom, Dicker, Simon R., Gallardo, Patricio A., Golec, Joseph E., Gudmundsson, Jon E., Harrington, Kathleen, Hattori, Makoto, Kofman, Anna, Kiuchi, Kenji, Kusaka, Akito, Limon, Michele, Matsuda, Frederick, McMahon, Jeff, Nati, Federico, Niemack, Michael D., Suzuki, Aritoki, Teply, Grant P., Thornton, Robert J., Wollack, Edward J., Zannoni, Mario, and Zhu, Ningfeng
Abstract: Controlling stray light at millimeter wavelengths requires special optical design and selection of absorptive materials that should be compatible with cryogenic operating environments. While a wide selection of absorptive materials exists, these typically exhibit high indices of refraction and reflect/scatter a significant fraction of light before absorption. For many lower index materials such as commercial microwave absorbers, their applications in cryogenic environments are challenging. In this paper, we present a new tool to control stray light: metamaterial microwave absorber tiles. These tiles comprise an outer metamaterial layer that approximates a lossy gradient index anti-reflection coating. They are fabricated via injection molding commercially available carbon-loaded polyurethane (25% by mass). The injection molding technology enables mass production at low cost. The design of these tiles is presented, along with thermal tests to 1 K. Room temperature optical measurements verify their control of reflectance to less than 1% up to 65∘ angles of incidence, and control of wide angle scattering below 0.01%. The dielectric properties of the bulk carbon-loaded material used in the tiles is also measured at different temperatures, confirming that the material maintains similar dielectric properties down to 3 K.
Published: 2021

48. Erratum: The Simons Observatory Large Aperture Telescope Receiver (ApJS (2021) 256: 23 DOI: 10.3847/1538-4365/ac0db7)

Author: Zhu N., Zhu, N, Bhandarkar, T, Coppi, G, Kofman, A, Orlowski-Scherer, J, Xu, Z, Adachi, S, Ade, P, Aiola, S, Austermann, J, Bazarko, A, Beall, J, Bhimani, S, Bond, J, Chesmore, G, Choi, S, Connors, J, Cothard, N, Devlin, M, Dicker, S, Dober, B, Duell, C, Duff, S, Dunner, R, Fabbian, G, Galitzki, N, Gallardo, P, Golec, J, Haridas, S, Harrington, K, Healy, E, Patty Ho, S, Huber, Z, Hubmayr, J, Iuliano, J, Johnson, B, Keating, B, Kiuchi, K, Koopman, B, Lashner, J, Lee, A, Li, Y, Limon, M, Link, M, Lucas, T, Mccarrick, H, Moore, J, Nati, F, Newburgh, L, Niemack, M, Pierpaoli, E, Randall, M, Sarmiento, K, Saunders, L, Seibert, J, Sierra, C, Sonka, R, Spisak, J, Sutariya, S, Tajima, O, Teply, G, Thornton, R, Tsan, T, Tucker, C, Ullom, J, Vavagiakis, E, Vissers, M, Walker, S, Westbrook, B, Wollack, E, Zannoni, M, Zhu N., Bhandarkar T., Coppi G., Kofman A. M., Orlowski-Scherer J. L., Xu Z., Adachi S., Ade P., Aiola S., Austermann J., Bazarko A. O., Beall J. A., Bhimani S., Bond J. R., Chesmore G. E., Choi S. K., Connors J., Cothard N. F., Devlin M., Dicker S., Dober B., Duell C. J., Duff S. M., Dunner R., Fabbian G., Galitzki N., Gallardo P. A., Golec J. E., Haridas S. K., Harrington K., Healy E., Patty Ho S. -P., Huber Z. B., Hubmayr J., Iuliano J., Johnson B. R., Keating B., Kiuchi K., Koopman B. J., Lashner J., Lee A. T., Li Y., Limon M., Link M., Lucas T. J., McCarrick H., Moore J., Nati F., Newburgh L. B., Niemack M. D., Pierpaoli E., Randall M. J., Sarmiento K. P., Saunders L. J., Seibert J., Sierra C., Sonka R., Spisak J., Sutariya S., Tajima O., Teply G. P., Thornton R. J., Tsan T., Tucker C., Ullom J., Vavagiakis E. M., Vissers M. R., Walker S., Westbrook B., Wollack E. J., Zannoni M., Zhu N., Zhu, N, Bhandarkar, T, Coppi, G, Kofman, A, Orlowski-Scherer, J, Xu, Z, Adachi, S, Ade, P, Aiola, S, Austermann, J, Bazarko, A, Beall, J, Bhimani, S, Bond, J, Chesmore, G, Choi, S, Connors, J, Cothard, N, Devlin, M, Dicker, S, Dober, B, Duell, C, Duff, S, Dunner, R, Fabbian, G, Galitzki, N, Gallardo, P, Golec, J, Haridas, S, Harrington, K, Healy, E, Patty Ho, S, Huber, Z, Hubmayr, J, Iuliano, J, Johnson, B, Keating, B, Kiuchi, K, Koopman, B, Lashner, J, Lee, A, Li, Y, Limon, M, Link, M, Lucas, T, Mccarrick, H, Moore, J, Nati, F, Newburgh, L, Niemack, M, Pierpaoli, E, Randall, M, Sarmiento, K, Saunders, L, Seibert, J, Sierra, C, Sonka, R, Spisak, J, Sutariya, S, Tajima, O, Teply, G, Thornton, R, Tsan, T, Tucker, C, Ullom, J, Vavagiakis, E, Vissers, M, Walker, S, Westbrook, B, Wollack, E, Zannoni, M, Zhu N., Bhandarkar T., Coppi G., Kofman A. M., Orlowski-Scherer J. L., Xu Z., Adachi S., Ade P., Aiola S., Austermann J., Bazarko A. O., Beall J. A., Bhimani S., Bond J. R., Chesmore G. E., Choi S. K., Connors J., Cothard N. F., Devlin M., Dicker S., Dober B., Duell C. J., Duff S. M., Dunner R., Fabbian G., Galitzki N., Gallardo P. A., Golec J. E., Haridas S. K., Harrington K., Healy E., Patty Ho S. -P., Huber Z. B., Hubmayr J., Iuliano J., Johnson B. R., Keating B., Kiuchi K., Koopman B. J., Lashner J., Lee A. T., Li Y., Limon M., Link M., Lucas T. J., McCarrick H., Moore J., Nati F., Newburgh L. B., Niemack M. D., Pierpaoli E., Randall M. J., Sarmiento K. P., Saunders L. J., Seibert J., Sierra C., Sonka R., Spisak J., Sutariya S., Tajima O., Teply G. P., Thornton R. J., Tsan T., Tucker C., Ullom J., Vavagiakis E. M., Vissers M. R., Walker S., Westbrook B., Wollack E. J., and Zannoni M.
Abstract: After the publication of the article, it was brought to our attention that the description of Equation (1) may cause potential confusion. Thus, we have decided to provide a newer reference and added a unit for qtot in the description. The updated paragraph should read as the following:.
Published: 2021

49. The Simons Observatory Large Aperture Telescope Receiver

Author: Zhu, N, Bhandarkar, T, Coppi, G, Kofman, A, Orlowski-Scherer, J, Xu, Z, Adachi, S, Ade, P, Aiola, S, Austermann, J, Bazarko, A, Beall, J, Bhimani, S, Richard Bond, J, Chesmore, G, Choi, S, Connors, J, Cothard, N, Devlin, M, Dicker, S, Dober, B, Duell, C, Duff, S, Dünner, R, Fabbian, G, Galitzki, N, Gallardo, P, Golec, J, Haridas, S, Harrington, K, Healy, E, Patty Ho, S, Huber, Z, Hubmayr, J, Iuliano, J, Johnson, B, Keatin, B, Kiuchi, K, Koopman, B, Lashner, J, Lee, A, Li, Y, Limon, M, Link, M, J Lucas, T, Mccarrick, H, Moore, J, Nati, F, Newburgh, L, Niemack, M, Pierpaoli, E, Randall, M, Perez Sarmiento, K, Saunders, L, Seibert, J, Sierra, C, Sonka, R, Spisak, J, Sutariya, S, Tajima, O, Teply, G, Thornton, R, Tsan, T, Tucker, C, Ullom, J, Vavagiakis, E, Vissers, M, Walker, S, Westbrook, B, Wollack, E, Zannoni, M, Ningfeng Zhu, Tanay Bhandarkar, Gabriele Coppi, Anna M. Kofman, John L. Orlowski-Scherer, Zhilei Xu, Shunsuke Adachi, Peter Ade, Simone Aiola, Jason Austermann, Andrew O. Bazarko, James A. Beall, Sanah Bhimani, J. Richard Bond, Grace E. Chesmore, Steve K. Choi, Jake Connors, Nicholas F. Cothard, Mark Devlin, Simon Dicker, Bradley Dober, Cody J. Duell, Shannon M. Duff, Rolando Dünner, Giulio Fabbian, Nicholas Galitzki, Patricio A. Gallardo, Joseph E. Golec, Saianeesh K. Haridas, Kathleen Harrington, Erin Healy, Shuay-Pwu Patty Ho, Zachary B. Huber, Johannes Hubmayr, Jeffrey Iuliano, Bradley R. Johnson, Brian Keatin, Kenji Kiuchi, Brian J. Koopman, Jack Lashner, Adrian T. Lee, Yaqiong Li, Michele Limon, Michael Link, Tammy J Lucas, Heather McCarrick, Jenna Moore, Federico Nati, Laura B. Newburgh, Michael D. Niemack, Elena Pierpaoli, Michael J. Randall, Karen Perez Sarmiento, Lauren J. Saunders, Joseph Seibert, Carlos Sierra, Rita Sonka, Jacob Spisak, Shreya Sutariya, Osamu Tajima, Grant P. Teply, Robert J. Thornton, Tran Tsan, Carole Tucker, Joel Ullom, Eve M. Vavagiakis, Michael R. Vissers, Samantha Walker, Benjamin Westbrook, Edward J. Wollack, Mario Zannoni, Zhu, N, Bhandarkar, T, Coppi, G, Kofman, A, Orlowski-Scherer, J, Xu, Z, Adachi, S, Ade, P, Aiola, S, Austermann, J, Bazarko, A, Beall, J, Bhimani, S, Richard Bond, J, Chesmore, G, Choi, S, Connors, J, Cothard, N, Devlin, M, Dicker, S, Dober, B, Duell, C, Duff, S, Dünner, R, Fabbian, G, Galitzki, N, Gallardo, P, Golec, J, Haridas, S, Harrington, K, Healy, E, Patty Ho, S, Huber, Z, Hubmayr, J, Iuliano, J, Johnson, B, Keatin, B, Kiuchi, K, Koopman, B, Lashner, J, Lee, A, Li, Y, Limon, M, Link, M, J Lucas, T, Mccarrick, H, Moore, J, Nati, F, Newburgh, L, Niemack, M, Pierpaoli, E, Randall, M, Perez Sarmiento, K, Saunders, L, Seibert, J, Sierra, C, Sonka, R, Spisak, J, Sutariya, S, Tajima, O, Teply, G, Thornton, R, Tsan, T, Tucker, C, Ullom, J, Vavagiakis, E, Vissers, M, Walker, S, Westbrook, B, Wollack, E, Zannoni, M, Ningfeng Zhu, Tanay Bhandarkar, Gabriele Coppi, Anna M. Kofman, John L. Orlowski-Scherer, Zhilei Xu, Shunsuke Adachi, Peter Ade, Simone Aiola, Jason Austermann, Andrew O. Bazarko, James A. Beall, Sanah Bhimani, J. Richard Bond, Grace E. Chesmore, Steve K. Choi, Jake Connors, Nicholas F. Cothard, Mark Devlin, Simon Dicker, Bradley Dober, Cody J. Duell, Shannon M. Duff, Rolando Dünner, Giulio Fabbian, Nicholas Galitzki, Patricio A. Gallardo, Joseph E. Golec, Saianeesh K. Haridas, Kathleen Harrington, Erin Healy, Shuay-Pwu Patty Ho, Zachary B. Huber, Johannes Hubmayr, Jeffrey Iuliano, Bradley R. Johnson, Brian Keatin, Kenji Kiuchi, Brian J. Koopman, Jack Lashner, Adrian T. Lee, Yaqiong Li, Michele Limon, Michael Link, Tammy J Lucas, Heather McCarrick, Jenna Moore, Federico Nati, Laura B. Newburgh, Michael D. Niemack, Elena Pierpaoli, Michael J. Randall, Karen Perez Sarmiento, Lauren J. Saunders, Joseph Seibert, Carlos Sierra, Rita Sonka, Jacob Spisak, Shreya Sutariya, Osamu Tajima, Grant P. Teply, Robert J. Thornton, Tran Tsan, Carole Tucker, Joel Ullom, Eve M. Vavagiakis, Michael R. Vissers, Samantha Walker, Benjamin Westbrook, Edward J. Wollack, and Mario Zannoni
Abstract: The Simons Observatory is a ground-based cosmic microwave background experiment that consists of three 0.4 m small-aperture telescopes and one 6 m Large Aperture Telescope, located at an elevation of 5300 m on Cerro Toco in Chile. The Simons Observatory Large Aperture Telescope Receiver (LATR) is the cryogenic camera that will be coupled to the Large Aperture Telescope. The resulting instrument will produce arcminute-resolution millimeter-wave maps of half the sky with unprecedented precision. The LATR is the largest cryogenic millimeter-wave camera built to date, with a diameter of 2.4 m and a length of 2.6 m. The coldest stage of the camera is cooled to 100 mK, the operating temperature of the bolometric detectors with bands centered around 27, 39, 93, 145, 225, and 280 GHz. Ultimately, the LATR will accommodate 13 40 cm diameter optics tubes, each with three detector wafers and a total of 62,000 detectors. The LATR design must simultaneously maintain the optical alignment of the system, control stray light, provide cryogenic isolation, limit thermal gradients, and minimize the time to cool the system from room temperature to 100 mK. The interplay between these competing factors poses unique challenges. We discuss the trade studies involved with the design, the final optimization, the construction, and ultimate performance of the system.
Published: 2021

50. The Simons Observatory: modeling optical systematics in the Large Aperture Telescope

Author: Gudmundsson, J, Gallardo, P, Puddu, R, Dicker, S, Adler, A, Ali, A, Bazarko, A, Chesmore, G, Coppi, G, Cothard, N, Dachlythra, N, Devlin, M, Dünner, R, Fabbian, G, Galitzki, N, Golec, J, Patty Ho, S, Hargrave, P, Kofman, A, Lee, A, Limon, M, Matsuda, F, Mauskopf, P, Moodley, K, Nati, F, Niemack, M, Orlowski-Scherer, J, Page, L, Partridge, B, Puglisi, G, Reichardt, C, Sierra, C, Simon, S, Teply, G, Tucker, C, Wollack, E, Xu, Z, Zhu, N, Gudmundsson, Jon E., Gallardo, Patricio A., Puddu, Roberto, Dicker, Simon R., Adler, Alexandre E., Ali, Aamir M., Bazarko, Andrew, Chesmore, Grace E., Coppi, Gabriele, Cothard, Nicholas F., Dachlythra, Nadia, Devlin, Mark, Dünner, Rolando, Fabbian, Giulio, Galitzki, Nicholas, Golec, Joseph E., Patty Ho, Shuay-Pwu, Hargrave, Peter C., Kofman, Anna M., Lee, Adrian T., Limon, Michele, Matsuda, Frederick T., Mauskopf, Philip D., Moodley, Kavilan, Nati, Federico, Niemack, Michael D., Orlowski-Scherer, John, Page, Lyman A., Partridge, Bruce, Puglisi, Giuseppe, Reichardt, Christian L., Sierra, Carlos E., Simon, Sara M., Teply, Grant P., Tucker, Carole, Wollack, Edward J., Xu, Zhilei, Zhu, Ningfeng, Gudmundsson, J, Gallardo, P, Puddu, R, Dicker, S, Adler, A, Ali, A, Bazarko, A, Chesmore, G, Coppi, G, Cothard, N, Dachlythra, N, Devlin, M, Dünner, R, Fabbian, G, Galitzki, N, Golec, J, Patty Ho, S, Hargrave, P, Kofman, A, Lee, A, Limon, M, Matsuda, F, Mauskopf, P, Moodley, K, Nati, F, Niemack, M, Orlowski-Scherer, J, Page, L, Partridge, B, Puglisi, G, Reichardt, C, Sierra, C, Simon, S, Teply, G, Tucker, C, Wollack, E, Xu, Z, Zhu, N, Gudmundsson, Jon E., Gallardo, Patricio A., Puddu, Roberto, Dicker, Simon R., Adler, Alexandre E., Ali, Aamir M., Bazarko, Andrew, Chesmore, Grace E., Coppi, Gabriele, Cothard, Nicholas F., Dachlythra, Nadia, Devlin, Mark, Dünner, Rolando, Fabbian, Giulio, Galitzki, Nicholas, Golec, Joseph E., Patty Ho, Shuay-Pwu, Hargrave, Peter C., Kofman, Anna M., Lee, Adrian T., Limon, Michele, Matsuda, Frederick T., Mauskopf, Philip D., Moodley, Kavilan, Nati, Federico, Niemack, Michael D., Orlowski-Scherer, John, Page, Lyman A., Partridge, Bruce, Puglisi, Giuseppe, Reichardt, Christian L., Sierra, Carlos E., Simon, Sara M., Teply, Grant P., Tucker, Carole, Wollack, Edward J., Xu, Zhilei, and Zhu, Ningfeng
Abstract: We present geometrical and physical optics simulation results for the Simons Observatory Large Aperture Telescope. This work was developed as part of the general design process for the telescope, allowing us to evaluate the impact of various design choices on performance metrics and potential systematic effects. The primary goal of the simulations was to evaluate the final design of the reflectors and the cold optics that are now being built. We describe nonsequential ray tracing used to inform the design of the cold optics, including absorbers internal to each optics tube. We discuss ray tracing simulations of the telescope structure that allow us to determine geometries that minimize detector loading and mitigate spurious near-field effects that have not been resolved by the internal baffling. We also describe physical optics simulations, performed over a range of frequencies and field locations, that produce estimates of monochromatic far-field beam patterns, which in turn are used to gauge general optical performance. Finally, we describe simulations that shed light on beam sidelobes from panel gap diffraction.
Published: 2021

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