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119 results on '"Rostem, Karwan"'

102. Variable-delay polarization modulators for the CLASS telescopes

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Harrington, Kathleen, Eimer, Joseph, Chuss, David T., Petroff, Matthew, Cleary, Joseph, DeGeorge, Martin, Grunberg, Theodore W., Ali, Aamir, Appel, John W., Bennett, Charles L., Brewer, Michael, Bustos, Ricardo, Chan, Manwei, Couto, Jullianna, Dahal, Sumit, Denis, Kevin, Dünner, Rolando, Essinger-Hileman, Thomas, Fluxa, Pedro, Halpern, Mark, Hilton, Gene, Hinshaw, Gary F., Hubmayr, Johannes, Iuliano, Jeffrey, Karakla, John, Marriage, Tobias, McMahon, Jeffrey, Miller, Nathan J., Nuñez, Carolina, Padilla, Ivan L., Palma, Gonzalo, Parker, Lucas, Pradenas Marquez, Bastian, Reeves, Rodrigo, Reintsema, Carl, Rostem, Karwan, Augusto Nunes Valle, Deniz, Van Engelhoven, Trevor, Wang, Bingjie, Wang, Qinan, Watts, Duncan, Weiland, Janet, Wollack, Edward, Xu, Zhilei, Yan, Ziang, and Zeng, Lingzhen

Published
2018
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103. Design and characterization of the Cosmology Large Angular Scale Surveyor (CLASS) 93 GHz focal plane

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Dahal, Sumit, Ali, Aamir, Appel, John W., Essinger-Hileman, Thomas, Bennett, Charles, Brewer, Michael, Bustos, Ricardo, Chan, Manwei, Chuss, David T., Cleary, Joseph, Colazo, Felipe, Couto, Jullianna, Denis, Kevin, Dünner, Rolando, Eimer, Joseph, Engelhoven, Trevor, Fluxa, Pedro, Halpern, Mark, Harrington, Kathleen, Helson, Kyle, Hilton, Gene, Hinshaw, Gary, Hubmayr, Johannes, Iuliano, Jeffery, Karakla, John, Marriage, Tobias, McMahon, Jeffrey, Miller, Nathan, Nuñez, Carolina, Padilla, Ivan, Palma, Gonzalo, Parker, Lucas, Petroff, Matthew, Pradenas, Bastian, Reeves, Rodrigo, Reintsema, Carl, Rostem, Karwan, Sagliocca, Marco, U-Yen, Kongpop, Valle, Deniz, Wang, Bingjie, Wang, Qinan, Watts, Duncan, Weiland, Janet, Wollack, Edward, Xu, Zhilei, Yan, Ziang, and Zeng, Lingzhen

Published
2018
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107. The Primordial Inflation Polarization Explorer (PIPER)

Author

Chuss, David T., primary, Ade, Peter A. R., additional, Benford, Dominic J., additional, Bennett, Charles L., additional, Dotson, Jessie L., additional, Eimer, Joseph R., additional, Fixsen, Dale J., additional, Halpern, Mark, additional, Hilton, Gene, additional, Hinderks, James, additional, Hinshaw, Gary, additional, Irwin, Kent, additional, Jackson, Michael L., additional, Jah, Muzariatu A., additional, Jethava, Nikhil, additional, Jhabvala, Christine, additional, Kogut, Alan J., additional, Lowe, Luke, additional, McCullagh, Nuala, additional, Miller, Timothy, additional, Mirel, Paul, additional, Moseley, S. Harvey, additional, Rodriguez, Samelys, additional, Rostem, Karwan, additional, Sharp, Elmer, additional, Staguhn, Johannes G., additional, Tucker, Carole E., additional, Voellmer, George M., additional, Wollack, Edward J., additional, and Zeng, Lingzhen, additional

Published
2010
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108. 5,120 superconducting bolometers for the PIPER balloon-borne CMB polarization experiment

Author

Benford, Dominic J., primary, Chuss, David T., additional, Hilton, Gene C., additional, Irwin, Kent D., additional, Jethava, Nikhil S., additional, Jhabvala, Christine A., additional, Kogut, Alan J., additional, Miller, Timothy M., additional, Mirel, Paul, additional, Moseley, S. Harvey, additional, Rostem, Karwan, additional, Sharp, Elmer H., additional, Staguhn, Johannes G., additional, Stiehl, Gregory M., additional, Voellmer, George M., additional, and Wollack, Edward J., additional

Published
2010
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111. The Cosmology Large Angular Scale Surveyor

Author

Holland, Wayne S., Zmuidzinas, Jonas, Harrington, Kathleen, Marriage, Tobias, Ali, Aamir, Appel, John W., Bennett, Charles L., Boone, Fletcher, Brewer, Michael, Chan, Manwei, Chuss, David T., Colazo, Felipe, Dahal, Sumit, Denis, Kevin, Dünner, Rolando, Eimer, Joseph, Essinger-Hileman, Thomas, Fluxa, Pedro, Halpern, Mark, Hilton, Gene, Hinshaw, Gary F., Hubmayr, Johannes, Iuliano, Jeffrey, Karakla, John, McMahon, Jeff, Miller, Nathan T., Moseley, Samuel H., Palma, Gonzalo, Parker, Lucas, Petroff, Matthew, Pradenas, Bastián, Rostem, Karwan, Sagliocca, Marco, Valle, Deniz, Watts, Duncan, Wollack, Edward, Xu, Zhilei, and Zeng, Lingzhen

Published
2016
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112. Silicon-based antenna-coupled polarization-sensitive millimeter-wave bolometer arrays for cosmic microwave background instruments

Author

Holland, Wayne S., Zmuidzinas, Jonas, Rostem, Karwan, Ali, Aamir, Appel, John W., Bennett, Charles L., Brown, Ari, Chang, Meng-Ping, Chuss, David T., Colazo, Felipe A., Costen, Nick, Denis, Kevin L., Essinger-Hileman, Tom, Hu, Ron, Marriage, Tobias A., Moseley, Samuel H., Stevenson, Thomas R., U-Yen, Kongpop, Wollack, Edward J., and Xu, Zhilei

Published
2016
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113. The cosmology large angular scale surveyor (CLASS): 38-GHz detector array of bolometric polarimeters

Author

Holland, Wayne S., Zmuidzinas, Jonas, Appel, John W., Ali, Aamir, Amiri, Mandana, Araujo, Derek, Bennet, Charles L., Boone, Fletcher, Chan, Manwei, Cho, Hsiao-Mei, Chuss, David T., Colazo, Felipe, Crowe, Erik, Denis, Kevin, Dünner, Rolando, Eimer, Joseph, Essinger-Hileman, Thomas, Gothe, Dominik, Halpern, Mark, Harrington, Kathleen, Hilton, Gene, Hinshaw, Gary F., Huang, Caroline, Irwin, Kent, Jones, Glenn, Karakula, John, Kogut, Alan J., Larson, David, Limon, Michele, Lowry, Lindsay, Marriage, Tobias, Mehrle, Nicholas, Miller, Amber D., Miller, Nathan, Moseley, Samuel H., Novak, Giles, Reintsema, Carl, Rostem, Karwan, Stevenson, Thomas, Towner, Deborah, U-Yen, Kongpop, Wagner, Emily, Watts, Duncan, Wollack, Edward, Xu, Zhilei, and Zeng, Lingzhen

Published
2014
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114. CLASS: the cosmology large angular scale surveyor

Author

Holland, Wayne S., Zmuidzinas, Jonas, Essinger-Hileman, Thomas, Ali, Aamir, Amiri, Mandana, Appel, John W., Araujo, Derek, Bennett, Charles L., Boone, Fletcher, Chan, Manwei, Cho, Hsiao-Mei, Chuss, David T., Colazo, Felipe, Crowe, Erik, Denis, Kevin, Dünner, Rolando, Eimer, Joseph, Gothe, Dominik, Halpern, Mark, Harrington, Kathleen, Hilton, Gene C., Hinshaw, Gary F., Huang, Caroline, Irwin, Kent, Jones, Glenn, Karakla, John, Kogut, Alan J., Larson, David, Limon, Michele, Lowry, Lindsay, Marriage, Tobias, Mehrle, Nicholas, Miller, Amber D., Miller, Nathan, Moseley, Samuel H., Novak, Giles, Reintsema, Carl, Rostem, Karwan, Stevenson, Thomas, Towner, Deborah, U-Yen, Kongpop, Wagner, Emily, Watts, Duncan, Wollack, Edward J., Xu, Zhilei, and Zeng, Lingzhen

Published
2014
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116. Variable-delay Polarization Modulators for the CLASS Telescopes

Author

Harrington, Kathleen, Eimer, Joseph, Chuss, David T., Petroff, Matthew, Cleary, Joseph, Degeorge, Martin, Grunberg, Theodore W., Ali, Aamir, Appel, John W., Bennett, Charles L., Brewer, Michael, Bustos, Ricardo, Chan, Manwei, Couto, Jullianna, Dahal, Sumit, Denis, Kevin, Dünner, Rolando, Essinger-Hileman, Thomas, Fluxa, Pedro, Halpern, Mark, Hilton, Gene, Hinshaw, Gary F., Hubmayr, Johannes, Iuliano, Jeffrey, Karakla, John, Marriage, Tobias, Mcmahon, Jeffrey, Miller, Nathan J., Nuñez, Carolina, Padilla, Ivan L., Palma, Gonzalo, Parker, Lucas, Pradenas Marquez, Bastian, Reeves, Rodrigo, Reintsema, Carl, Rostem, Karwan, Valle, Deniz Augusto Nunes, Engelhoven, Trevor, Wang, Bingjie, Wang, Qinan, Duncan Watts, Weiland, Janet, Wollack, Edward, Xu, Zhilei, Yan, Ziang, and Zeng, Lingzhen

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The search for inflationary primordial gravitational waves and the measurement of the optical depth to reionization, both through their imprint on the large angular scale correlations in the polarization of the cosmic microwave background (CMB), has created the need for high sensitivity measurements of polarization across large fractions of the sky at millimeter wavelengths. These measurements are subject to instrumental and atmospheric $1/f$ noise, which has motivated the development of polarization modulators to facilitate the rejection of these large systematic effects. Variable-delay polarization modulators (VPMs) are used in the Cosmology Large Angular Scale Surveyor (CLASS) telescopes as the first element in the optical chain to rapidly modulate the incoming polarization. VPMs consist of a linearly polarizing wire grid in front of a movable flat mirror. Varying the distance between the grid and the mirror produces a changing phase shift between polarization states parallel and perpendicular to the grid which modulates Stokes U (linear polarization at $45^\circ$) and Stokes V (circular polarization). The CLASS telescopes have VPMs as the first optical element from the sky; this simultaneously allows a lock-in style polarization measurement and the separation of sky polarization from any instrumental polarization further along in the optical path. The Q-band CLASS VPM was the first VPM to begin observing the CMB full time, starting in the Spring of 2016. The first W-band CLASS VPM was installed in the Spring of 2018.

117. The Primordial Inflation Polarization Explorer (PIPER)

Author

Holland, Wayne S., Zmuidzinas, Jonas, Chuss, David T., Ade, Peter A. R., Benford, Dominic J., Bennett, Charles L., Dotson, Jessie L., Eimer, Joseph R., Fixsen, Dale J., Halpern, Mark, Hilton, Gene, Hinderks, James, Hinshaw, Gary, Irwin, Kent, Jackson, Michael L., Jah, Muzariatu A., Jethava, Nikhil, Jhabvala, Christine, Kogut, Alan J., Lowe, Luke, McCullagh, Nuala, Miller, Timothy, Mirel, Paul, Moseley, S. Harvey, Rodriguez, Samelys, Rostem, Karwan, Sharp, Elmer, Staguhn, Johannes G., Tucker, Carole Elizabeth, Voellmer, George M., Wollack, Edward J., Zeng, Lingzhen, Holland, Wayne S., Zmuidzinas, Jonas, Chuss, David T., Ade, Peter A. R., Benford, Dominic J., Bennett, Charles L., Dotson, Jessie L., Eimer, Joseph R., Fixsen, Dale J., Halpern, Mark, Hilton, Gene, Hinderks, James, Hinshaw, Gary, Irwin, Kent, Jackson, Michael L., Jah, Muzariatu A., Jethava, Nikhil, Jhabvala, Christine, Kogut, Alan J., Lowe, Luke, McCullagh, Nuala, Miller, Timothy, Mirel, Paul, Moseley, S. Harvey, Rodriguez, Samelys, Rostem, Karwan, Sharp, Elmer, Staguhn, Johannes G., Tucker, Carole Elizabeth, Voellmer, George M., Wollack, Edward J., and Zeng, Lingzhen

Abstract

The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne instrument designed to search for the faint signature of inflation in the polarized component of the cosmic microwave background (CMB). Each flight will be configured for a single frequency, but in order to aid in the removal of the polarized foreground signal due to Galactic dust, the filters will be changed between flights. In this way, the CMB polarization at a total of four different frequencies (200, 270, 350, and 600 GHz) will be measured on large angular scales. PIPER consists of a pair of cryogenic telescopes, one for measuring each of Stokes Q and U in the instrument frame. Each telescope receives both linear orthogonal polarizations in two 32 × 40 element planar arrays that utilize Transition-Edge Sensors (TES). The first element in each telescope is a variable-delay polarization modulator (VPM) that fully modulates the linear Stokes parameter to which the telescope is sensitive. There are several advantages to this architecture. First, by modulating at the front of the optics, instrumental polarization is unmodulated and is therefore cleanly separated from source polarization. Second, by implementing this system with the appropriate symmetry, systematic effects can be further mitigated. In the PIPER design, many of the systematics are manifest in the unmeasured linear Stokes parameter for each telescope and thus can be separated from the desired signal. Finally, the modulation cycle never mixes the Q and U linear Stokes parameters, and thus residuals in the modulation do not twist the observed polarization vector. This is advantageous because measuring the angle of linear polarization is critical for separating the inflationary signal from other polarized components.

119. The Cosmology Large Angular Scale Surveyor receiver design

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Iuliano, Jeffrey, Eimer, Joseph, Parker, Lucas, Rhoades, Gary, Ali, Aamir, Appel, John W., Bennett, Charles, Brewer, Michael, Bustos, Ricardo, Chuss, David, Cleary, Joseph, Couto, Jullianna, Dahal, Sumit, Denis, Kevin, Dünner, Rolando, Essinger-Hileman, Thomas, Fluxa, Pedro, Halpern, Mark, Harrington, Kathleen, Helson, Kyle, Hilton, Gene, Hinshaw, Gary, Hubmayr, Johannes, Karakla, John, Marriage, Tobias, Miller, Nathan, McMahon, Jeffrey John, Nuñez, Carolina, Padilla, Ivan, Palma, Gonzalo, Petroff, Matthew, Pradenas Márquez, Bastian, Reeves, Rodrigo, Reintsema, Carl, Rostem, Karwan, Augusto Nunes Valle, Deniz, Van Engelhoven, Trevor, Wang, Bingjie, Wang, Qinan, Watts, Duncan, Weiland, Janet, Wollack, Edward J., Xu, Zhilei, Yan, Ziang, and Zeng, Lingzhen

Published
2018
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