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202. The cosmology large angular scale surveyor (CLASS) telescope architecture

Author

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

Published
2014
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204. The 2nd Generation z(Redshift) and Early Universe Spectrometer Part I: First-light observation of a highly lensed local-ULIRG analog at high-z

Author

Ferkinhoff, Carl, Brisbin, Drew, Parshley, Stephen, Nikola, Thomas, Stacey, Gordon J., Schoenwald, Justin, Higdon, James L., Higdon, Sarah J. U., Verma, Aprajita, Riechers, Dominik, Hailey-Dunsheath, Steven, Menten, Karl M., Güsten, Rolf, Weiß, Axel, Irwin, Kent, Cho, Hsiao M., Niemack, Michael, Halpern, Mark, Amiri, Mandana, Hasselfield, Matthew, Wiebe, D. V., Ade, Peter A. R., Tucker, Carol E., Ferkinhoff, Carl, Brisbin, Drew, Parshley, Stephen, Nikola, Thomas, Stacey, Gordon J., Schoenwald, Justin, Higdon, James L., Higdon, Sarah J. U., Verma, Aprajita, Riechers, Dominik, Hailey-Dunsheath, Steven, Menten, Karl M., Güsten, Rolf, Weiß, Axel, Irwin, Kent, Cho, Hsiao M., Niemack, Michael, Halpern, Mark, Amiri, Mandana, Hasselfield, Matthew, Wiebe, D. V., Ade, Peter A. R., and Tucker, Carol E.

Abstract

We report first science results from our new spectrometer, the 2nd generation z(Redshift) and Early Universe Spectrometer (ZEUS-2), recently commissioned on the Atacama Pathfinder Experiment telescope (APEX). ZEUS-2 is a submillimeter grating spectrometer optimized for detecting the faint and broad lines from distant galaxies that are redshifted into the telluric windows from 200 to 850 microns. It utilizes a focal plane array of transition-edge sensed bolometers, the first use of these arrays for astrophysical spectroscopy. ZEUS-2 promises to be an important tool for studying galaxies in the years to come due to its synergy with ALMA and its capabilities in the short submillimeter windows that are unique in the post Herschel era. Here we report on our first detection of the [CII] 158 $\mu m$ line with ZEUS-2. We detect the line at z ~ 1.8 from H-ATLAS J091043.1-000322 with a line flux of $(6.44 \pm 0.42) \times 10^{-18} W m^{-2}$. Combined with its far-infrared luminosity and a new Herschel-PACS detection of the [OI] 63 $\mu m $ line we model the line emission as coming from a photo-dissociation region with far-ultraviolet radiation field, $G \approx 2 \times 10^{4} G_{0}$, gas density, $n \approx 1 \times 10^{3} cm^{-3}$ and size between ~ 0.4 and 1 kpc. Based on this model, we conclude that H-ATLAS J091043.1-000322 is a high redshift analogue of a local ultra-luminous infrared galaxy, i.e. it is likely the site of a compact starburst due to a major merger. Further identification of these merging systems is important for constraining galaxy formation and evolution models., Comment: Accepted for Publication in ApJ; Corrected Typo

Published
2013
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205. The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data

Author

Sievers, Jonathan L., Hlozek, Renée A., Nolta, Michael R., Acquaviva, Viviana, Addison, Graeme E., Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Battaglia, Nick, Bond, J. Richard, Brown, Ben, Burger, Bryce, Calabrese, Erminia, Chervenak, Jay, Crichton, Devin, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dünner, Rolando, Essinger-Hileman, Thomas, Faber, David, Fisher, Ryan P., Fowler, Joseph W., Gallardo, Patricio, Gordon, Michael S., Gralla, Megan B., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hernández-Monteagudo, Carlos, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Holtz, Dave, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Jacobson, David R., Johnstone, Brittany, Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M, Limon, Michele, Lin, Yen-Ting, Louis, Thibaut, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, McLaren, Michael, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B, Niemack, Michael D., Page, Lyman A., Page, William A., Parker, Lucas, Partridge, Bruce, Plimpton, Reed, Quintana, Hernan, Reese, Erik D., Reid, Beth, Rojas, Felipe, Sehgal, Neelima, Sherwin, Blake D., Schmitt, Benjamin L., Spergel, David N., Staggs, Suzanne T., Stryzak, Omelan, Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Uehara, Masao, Visnjic, Katerina, Warne, Ryan, Wilson, Grant, Wollack, Ed, Zhao, Yue, Zunckel, Caroline, Sievers, Jonathan L., Hlozek, Renée A., Nolta, Michael R., Acquaviva, Viviana, Addison, Graeme E., Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Battaglia, Nick, Bond, J. Richard, Brown, Ben, Burger, Bryce, Calabrese, Erminia, Chervenak, Jay, Crichton, Devin, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dünner, Rolando, Essinger-Hileman, Thomas, Faber, David, Fisher, Ryan P., Fowler, Joseph W., Gallardo, Patricio, Gordon, Michael S., Gralla, Megan B., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hernández-Monteagudo, Carlos, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Holtz, Dave, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Jacobson, David R., Johnstone, Brittany, Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M, Limon, Michele, Lin, Yen-Ting, Louis, Thibaut, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, McLaren, Michael, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B, Niemack, Michael D., Page, Lyman A., Page, William A., Parker, Lucas, Partridge, Bruce, Plimpton, Reed, Quintana, Hernan, Reese, Erik D., Reid, Beth, Rojas, Felipe, Sehgal, Neelima, Sherwin, Blake D., Schmitt, Benjamin L., Spergel, David N., Staggs, Suzanne T., Stryzak, Omelan, Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Uehara, Masao, Visnjic, Katerina, Warne, Ryan, Wilson, Grant, Wollack, Ed, Zhao, Yue, and Zunckel, Caroline

Abstract

We present constraints on cosmological and astrophysical parameters from high-resolution microwave background maps at 148 GHz and 218 GHz made by the Atacama Cosmology Telescope (ACT) in three seasons of observations from 2008 to 2010. A model of primary cosmological and secondary foreground parameters is fit to the map power spectra and lensing deflection power spectrum, including contributions from both the thermal Sunyaev-Zeldovich (tSZ) effect and the kinematic Sunyaev-Zeldovich (kSZ) effect, Poisson and correlated anisotropy from unresolved infrared sources, radio sources, and the correlation between the tSZ effect and infrared sources. The power ell^2 C_ell/2pi of the thermal SZ power spectrum at 148 GHz is measured to be 3.4 +\- 1.4 muK^2 at ell=3000, while the corresponding amplitude of the kinematic SZ power spectrum has a 95% confidence level upper limit of 8.6 muK^2. Combining ACT power spectra with the WMAP 7-year temperature and polarization power spectra, we find excellent consistency with the LCDM model. We constrain the number of effective relativistic degrees of freedom in the early universe to be Neff=2.79 +\- 0.56, in agreement with the canonical value of Neff=3.046 for three massless neutrinos. We constrain the sum of the neutrino masses to be Sigma m_nu < 0.39 eV at 95% confidence when combining ACT and WMAP 7-year data with BAO and Hubble constant measurements. We constrain the amount of primordial helium to be Yp = 0.225 +\- 0.034, and measure no variation in the fine structure constant alpha since recombination, with alpha/alpha0 = 1.004 +/- 0.005. We also find no evidence for any running of the scalar spectral index, dns/dlnk = -0.004 +\- 0.012., Comment: 26 pages, 22 figures. This paper is a companion to Das et al. (2013) and Dunkley et al. (2013). Matches published JCAP version

Published
2013
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206. Overall Water Splitting by Bio-Modification of Fe3O4with Co–Ni Complexes

Author

Amiri, Mandana, Afruz, Ali, Nozari-Asbemarz, Mehran, Bezaatpour, Abolfazl, Vocke, Heinrich, Taffa, Dereje H., and Wark, Michael

Abstract

For years, hydrogen has found much interest as a substitute for fossil fuels but the high cost of green hydrogen production has led to a small share of the daily energy consumed. To overcome this issue, various low-cost electrocatalysts have been designed and reported to facilitate water splitting and hydrogen production. In this study, by using polyphenols extracts from Camellia sinensis plant and folic acid along with magnetic cores, we designed and synthesized a novel electrocatalyst with high ability of water splitting reactions. The catalyst was characterized by using transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, FTIR spectroscopy and thermogravimetric techniques. The catalyst exhibited high performance for overall water splitting. The overpotential of 245 mV and 346 mV (for 100 mA cm–2) with a Tafel slopes of 39 and 86 mV dec–1were obtained for OER and HER, respectively. The Faradic efficiency for both OER and HER was calculated being close to 100%.

Published
2023
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207. The Atacama Cosmology Telescope: Data Characterization and Map Making

Author

Dünner, Rolando, Hasselfield, Matthew, Marriage, Tobias A., Sievers, Jon, Acquaviva, Viviana, Addison, Graeme E., Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Calabrese, Erminia, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Essinger-Hileman, Thomas, Fisher, Ryan P., Gralla, Megan B., Fowler, Joseph W., Hajian, Amir, Halpern, Mark, Hernández-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M., Limon, Michele, Lin, Yen-Ting, Louis, Thibaut, Lupton, Robert H., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Quintana, Hernán, Reid, Beth, Sehgal, Neelima, Sherwin, Blake D., Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Warne, Ryan, Wilson, Grant, Wollack, Ed, Zhao, Yue, Dünner, Rolando, Hasselfield, Matthew, Marriage, Tobias A., Sievers, Jon, Acquaviva, Viviana, Addison, Graeme E., Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Calabrese, Erminia, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Essinger-Hileman, Thomas, Fisher, Ryan P., Gralla, Megan B., Fowler, Joseph W., Hajian, Amir, Halpern, Mark, Hernández-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M., Limon, Michele, Lin, Yen-Ting, Louis, Thibaut, Lupton, Robert H., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Quintana, Hernán, Reid, Beth, Sehgal, Neelima, Sherwin, Blake D., Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Warne, Ryan, Wilson, Grant, Wollack, Ed, and Zhao, Yue

Abstract

We present a description of the data reduction and mapmaking pipeline used for the 2008 observing season of the Atacama Cosmology Telescope (ACT). The data presented here at 148 GHz represent 12% of the 90 TB collected by ACT from 2007 to 2010. In 2008 we observed for 136 days, producing a total of 1423 hours of data (11 TB for the 148 GHz band only), with a daily average of 10.5 hours of observation. From these, 1085 hours were devoted to a 850 deg^2 stripe (11.2 hours by 9.1 deg) centered on a declination of -52.7 deg, while 175 hours were devoted to a 280 deg^2 stripe (4.5 hours by 4.8 deg) centered at the celestial equator. We discuss sources of statistical and systematic noise, calibration, telescope pointing, and data selection. Out of 1260 survey hours and 1024 detectors per array, 816 hours and 593 effective detectors remain after data selection for this frequency band, yielding a 38% survey efficiency. The total sensitivity in 2008, determined from the noise level between 5 Hz and 20 Hz in the time-ordered data stream (TOD), is 32 micro-Kelvin sqrt{s} in CMB units. Atmospheric brightness fluctuations constitute the main contaminant in the data and dominate the detector noise covariance at low frequencies in the TOD. The maps were made by solving the least-squares problem using the Preconditioned Conjugate Gradient method, incorporating the details of the detector and noise correlations. Cross-correlation with WMAP sky maps, as well as analysis from simulations, reveal that our maps are unbiased at multipoles ell > 300. This paper accompanies the public release of the 148 GHz southern stripe maps from 2008. The techniques described here will be applied to future maps and data releases., Comment: 20 pages, 18 figures, 6 tables, an ACT Collaboration paper

Published
2012
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208. The Atacama Cosmology Telescope: Cosmology from Galaxy Clusters Detected via the Sunyaev-Zel'dovich Effect

Author

Sehgal, Neelima, Trac, Hy, Acquaviva, Viviana, Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John W., Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dünner, Rolando, Essinger-Hileman, Thomas, Fisher, Ryan P., Fowler, Joseph W., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hernández-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Holtz, David, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Jones, Andrew, Juin, Jean Baptiste, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M., Limon, Michele, Lin, Yen-Ting, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Reid, Beth, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Tucker, Carole, Warne, Ryan, Wollack, Ed, Zhao, Yue, Sehgal, Neelima, Trac, Hy, Acquaviva, Viviana, Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John W., Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dünner, Rolando, Essinger-Hileman, Thomas, Fisher, Ryan P., Fowler, Joseph W., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hernández-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Holtz, David, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Jones, Andrew, Juin, Jean Baptiste, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M., Limon, Michele, Lin, Yen-Ting, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Martocci, Krista, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Reid, Beth, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Tucker, Carole, Warne, Ryan, Wollack, Ed, and Zhao, Yue

Abstract

We present constraints on cosmological parameters based on a sample of Sunyaev-Zel'dovich-selected galaxy clusters detected in a millimeter-wave survey by the Atacama Cosmology Telescope. The cluster sample used in this analysis consists of 9 optically-confirmed high-mass clusters comprising the high-significance end of the total cluster sample identified in 455 square degrees of sky surveyed during 2008 at 148 GHz. We focus on the most massive systems to reduce the degeneracy between unknown cluster astrophysics and cosmology derived from SZ surveys. We describe the scaling relation between cluster mass and SZ signal with a 4-parameter fit. Marginalizing over the values of the parameters in this fit with conservative priors gives sigma_8 = 0.851 +/- 0.115 and w = -1.14 +/- 0.35 for a spatially-flat wCDM cosmological model with WMAP 7-year priors on cosmological parameters. This gives a modest improvement in statistical uncertainty over WMAP 7-year constraints alone. Fixing the scaling relation between cluster mass and SZ signal to a fiducial relation obtained from numerical simulations and calibrated by X-ray observations, we find sigma_8 = 0.821 +/- 0.044 and w = -1.05 +/- 0.20. These results are consistent with constraints from WMAP 7 plus baryon acoustic oscillations plus type Ia supernoava which give sigma_8 = 0.802 +/- 0.038 and w = -0.98 +/- 0.053. A stacking analysis of the clusters in this sample compared to clusters simulated assuming the fiducial model also shows good agreement. These results suggest that, given the sample of clusters used here, both the astrophysics of massive clusters and the cosmological parameters derived from them are broadly consistent with current models., Comment: 12 pages, 7 figures. Submitted to ApJ

Published
2010
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209. The Atacama Cosmology Telescope: Calibration with WMAP Using Cross-Correlations

Author

Hajian, Amir, Acquaviva, Viviana, Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dunner, Rolando, Essinger-Hileman, Thomas, Fisher, Ryan P., Fowler, Joseph W., Halpern, Mark, Hasselfield, Matthew, Hernandez-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renee, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M, Limon, Michele, Lin, Yen-Ting, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Reid, Beth, Sehgal, Neelima, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Warne, Ryan, Wollack, Ed, Zhao, Yue, Hajian, Amir, Acquaviva, Viviana, Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John William, Barrientos, L. Felipe, Battistelli, Elia S., Bond, J. Richard, Brown, Ben, Burger, Bryce, Chervenak, Jay, Das, Sudeep, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dunner, Rolando, Essinger-Hileman, Thomas, Fisher, Ryan P., Fowler, Joseph W., Halpern, Mark, Hasselfield, Matthew, Hernandez-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renee, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M, Limon, Michele, Lin, Yen-Ting, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Mauskopf, Phil, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Reid, Beth, Sehgal, Neelima, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole, Warne, Ryan, Wollack, Ed, and Zhao, Yue

Abstract

We present a new calibration method based on cross-correlations with WMAP and apply it to data from the Atacama Cosmology Telescope (ACT). ACT's observing strategy and map making procedure allows an unbiased reconstruction of the modes in the maps over a wide range of multipoles. By directly matching the ACT maps to WMAP observations in the multipole range of 400 < ell < 1000, we determine the absolute calibration with an uncertainty of 2% in temperature. The precise measurement of the calibration error directly impacts the uncertainties in the cosmological parameters estimated from the ACT power spectra. We also present a combined map based on ACT and WMAP data that has high signal-to-noise over a wide range of multipoles., Comment: Submitted to ApJ. This is a companion to Das et al (2010) and Dunkley et al (2010)

Published
2010
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210. Modeling and characterization of the SPIDER half-wave plate

Author

Bryan, Sean A., Ade, Peter A. R., Amiri, Mandana, Benton, Steve, Bihary, Richard, Bock, James J., Bond, J. Richard, Bonetti, Joseph A., Chiang, H. Cynthia, Contaldi, Carlo R., Crill, Brendan P., O'Dea, Daniel, Dore, Olivier, Farhang, Marzieh, Filippini, Jeffrey P., Fissel, Laura, Gandilo, Natalie, Golwala, Sunil, Gudmundsson, Jon E., Hasselfield, Matthew, Halpern, Mark, Helson, Kyle R., Hilton, Gene, Holmes, Warren, Hristov, Viktor V., Irwin, Kent D., Jones, William C., Kuo, Chao Lin, MacTavish, Carrie J., Mason, Peter, Morford, Tracy, Montroy, Thomas E., Netterfield, C. Barth, Rahlin, Alexandra S., Reintsema, Carl D., Riley, Daniel, Ruhl, John E., Runyan, Marcus C., Schenker, Matthew A., Shariff, Jamil, Soler, Juan Diego, Trangsrud, Amy, Tucker, Rebecca, Tucker, Carole, Turner, Anthony, Bryan, Sean A., Ade, Peter A. R., Amiri, Mandana, Benton, Steve, Bihary, Richard, Bock, James J., Bond, J. Richard, Bonetti, Joseph A., Chiang, H. Cynthia, Contaldi, Carlo R., Crill, Brendan P., O'Dea, Daniel, Dore, Olivier, Farhang, Marzieh, Filippini, Jeffrey P., Fissel, Laura, Gandilo, Natalie, Golwala, Sunil, Gudmundsson, Jon E., Hasselfield, Matthew, Halpern, Mark, Helson, Kyle R., Hilton, Gene, Holmes, Warren, Hristov, Viktor V., Irwin, Kent D., Jones, William C., Kuo, Chao Lin, MacTavish, Carrie J., Mason, Peter, Morford, Tracy, Montroy, Thomas E., Netterfield, C. Barth, Rahlin, Alexandra S., Reintsema, Carl D., Riley, Daniel, Ruhl, John E., Runyan, Marcus C., Schenker, Matthew A., Shariff, Jamil, Soler, Juan Diego, Trangsrud, Amy, Tucker, Rebecca, Tucker, Carole, and Turner, Anthony

Abstract

Spider is a balloon-borne array of six telescopes that will observe the Cosmic Microwave Background. The 2624 antenna-coupled bolometers in the instrument will make a polarization map of the CMB with approximately one-half degree resolution at 145 GHz. Polarization modulation is achieved via a cryogenic sapphire half-wave plate (HWP) skyward of the primary optic. We have measured millimeter-wave transmission spectra of the sapphire at room and cryogenic temperatures. The spectra are consistent with our physical optics model, and the data gives excellent measurements of the indices of A-cut sapphire. We have also taken preliminary spectra of the integrated HWP, optical system, and detectors in the prototype Spider receiver. We calculate the variation in response of the HWP between observing the CMB and foreground spectra, and estimate that it should not limit the Spider constraints on inflation.

Published
2010
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211. Low-pressure CO2 fixation with epoxides via a new modified nano crystalline NH2-MIL-101(Cr) in Solvent-free and cocatalyst free condition.

Author

Bezaatpour, Abolfazl, Amiri, Mandana, Vocke, Heinrich, Bottke, Patrick, Zastrau, May-Franzis, Weers, Marco, and Wark, Michael

Subjects
EPOXY compounds, CARBON dioxide, AMMONIUM salts, METAL-organic frameworks, LEWIS acids, AMMONIUM bromide
Abstract

Incorporation of appropriate Lewis acid centers such as Cr3+ and nucleophilic ionic species such as Br- as assistants in the opening of epoxy rings, on the metal-organic frameworks can be considered an efficient catalyst in a CO 2 fixation processes. In this research work, we introduce a new catalyst by modifying the metal-organic framework and creating the ammonium salt with bromide, TEAB-MIL-101(Cr). The catalyst was characterized using several appropriate techniques and used as catalyst in the CO 2 fixation reaction of a large number of epoxides. The catalytic reaction was pushed forward under solvent and cocatalyst-free conditions at 1.5 bar of CO 2. The catalyst showed high activity in the presence of most epoxides, but the best result was related to epichlorohydrin, which showed 99 % conversion and 96 % selectivity to the respective cyclic carbonate within 3 h. The prepared catalyst was easily recovered and reused to the catalytic process for at least fifth times without any noticeable change in activity. [Display omitted] • An efficient catalyst for the CO2 fixation reaction of epoxides. • Solvent-free CO2 fixation reaction of epoxides. • Co-catalyst free CO2 fixation reaction of epoxides. • High conversion and selectivity in presence of low pressure of CO2 gas in CO2 fixation reaction of epoxides. [ABSTRACT FROM AUTHOR]

Published
2023
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212. THE SECOND-GENERATIONz(REDSHIFT) AND EARLY UNIVERSE SPECTROMETER. I. FIRST-LIGHT OBSERVATION OF A HIGHLY LENSED LOCAL-ULIRG ANALOG AT HIGH-z

Author

Ferkinhoff, Carl, primary, Brisbin, Drew, additional, Parshley, Stephen, additional, Nikola, Thomas, additional, Stacey, Gordon J., additional, Schoenwald, Justin, additional, Higdon, James L., additional, Higdon, Sarah J. U., additional, Verma, Aprajita, additional, Riechers, Dominik, additional, Hailey-Dunsheath, Steven, additional, Menten, Karl M., additional, Güsten, Rolf, additional, Weiß, Axel, additional, Irwin, Kent, additional, Cho, Hsiao M., additional, Niemack, Michael, additional, Halpern, Mark, additional, Amiri, Mandana, additional, Hasselfield, Matthew, additional, Wiebe, D. V., additional, Ade, Peter A. R., additional, and Tucker, Carol E., additional

Published
2013
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214. The Atacama Cosmology Telescope: cosmological parameters from three seasons of data

Author

Sievers, Jonathan L, primary, Hlozek, Renée A, additional, Nolta, Michael R, additional, Acquaviva, Viviana, additional, Addison, Graeme E, additional, Ade, Peter A. R, additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John William, additional, Barrientos, L. Felipe, additional, Battistelli, Elia S, additional, Battaglia, Nick, additional, Bond, J. Richard, additional, Brown, Ben, additional, Burger, Bryce, additional, Calabrese, Erminia, additional, Chervenak, Jay, additional, Crichton, Devin, additional, Das, Sudeep, additional, Devlin, Mark J, additional, Dicker, Simon R, additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Dünner, Rolando, additional, Essinger-Hileman, Thomas, additional, Faber, David, additional, Fisher, Ryan P, additional, Fowler, Joseph W, additional, Gallardo, Patricio, additional, Gordon, Michael S, additional, Gralla, Megan B, additional, Hajian, Amir, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hernández-Monteagudo, Carlos, additional, Hill, J. Colin, additional, Hilton, Gene C, additional, Hilton, Matt, additional, Hincks, Adam D, additional, Holtz, Dave, additional, Huffenberger, Kevin M, additional, Hughes, David H, additional, Hughes, John P, additional, Infante, Leopoldo, additional, Irwin, Kent D, additional, Jacobson, David R, additional, Johnstone, Brittany, additional, Juin, Jean Baptiste, additional, Kaul, Madhuri, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M, additional, Limon, Michele, additional, Lin, Yen-Ting, additional, Louis, Thibaut, additional, Lupton, Robert H, additional, Marriage, Tobias A, additional, Marsden, Danica, additional, Martocci, Krista, additional, Mauskopf, Phil, additional, McLaren, Michael, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B, additional, Niemack, Michael D, additional, Page, Lyman A, additional, Page, William A, additional, Parker, Lucas, additional, Partridge, Bruce, additional, Plimpton, Reed, additional, Quintana, Hernan, additional, Reese, Erik D, additional, Reid, Beth, additional, Rojas, Felipe, additional, Sehgal, Neelima, additional, Sherwin, Blake D, additional, Schmitt, Benjamin L, additional, Spergel, David N, additional, Staggs, Suzanne T, additional, Stryzak, Omelan, additional, Swetz, Daniel S, additional, Switzer, Eric R, additional, Thornton, Robert, additional, Trac, Hy, additional, Tucker, Carole, additional, Uehara, Masao, additional, Visnjic, Katerina, additional, Warne, Ryan, additional, Wilson, Grant, additional, Wollack, Ed, additional, Zhao, Yue, additional, and Zunckel, Caroline, additional

Published
2013
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217. Adsorption of Amlodipine at the Surface of Tosyl─Carbon Nanoparticles for Electrochemical Sensing.

Author

Amiri, Mandana and Imanzade, Hamideh

Subjects
*AMLODIPINE, *ELECTROCHEMICAL sensors, *CARBON absorption & adsorption, *ELECTRIC properties of carbon nanotubes, *VOLTAMMETRY technique, *ELECTRIC properties of nanostructured materials, *THERAPEUTICS
Abstract

The adsorption processes of amlodipine onto hydrophilic carbon nanoparticles (Emperor 2000TM) are investigated. The significant increase in voltammetric responses for pre-adsorbed amlodipine compared with those for solution confirms high affinity of amlodipine to carbon nanoparticles (possibly due to π-π stacking interaction between aromatic rings of amlodipine and surface-sulfonated carbon nanoparticles). To obtain the optimum of adsorption conditions, the effects of pH, agitation rate, and adsorption time are investigated. Under differential pulse voltammetry conditions, the peak current for the oxidation of amlodipine shows two linear relationships with concentration in the range from 1000 μM to 10.0 μM and 10.0 μM to 10.0 nM. The limit of detection is estimated to be 1.0 nM. Determination of amlodipine in real samples such as human serum and commercial tablets is demonstrated. [ABSTRACT FROM AUTHOR]

Published
2016

218. THE ATACAMA COSMOLOGY TELESCOPE: DATA CHARACTERIZATION AND MAPMAKING

Author

Dünner, Rolando, primary, Hasselfield, Matthew, additional, Marriage, Tobias A., additional, Sievers, Jon, additional, Acquaviva, Viviana, additional, Addison, Graeme E., additional, Ade, Peter A. R., additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John William, additional, Barrientos, L. Felipe, additional, Battistelli, Elia S., additional, Bond, J. Richard, additional, Brown, Ben, additional, Burger, Bryce, additional, Calabrese, Erminia, additional, Chervenak, Jay, additional, Das, Sudeep, additional, Devlin, Mark J., additional, Dicker, Simon R., additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Essinger-Hileman, Thomas, additional, Fisher, Ryan P., additional, Gralla, Megan B., additional, Fowler, Joseph W., additional, Hajian, Amir, additional, Halpern, Mark, additional, Hernández-Monteagudo, Carlos, additional, Hilton, Gene C., additional, Hilton, Matt, additional, Hincks, Adam D., additional, Hlozek, Renée, additional, Huffenberger, Kevin M., additional, Hughes, David H., additional, Hughes, John P., additional, Infante, Leopoldo, additional, Irwin, Kent D., additional, Juin, Jean Baptiste, additional, Kaul, Madhuri, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M., additional, Limon, Michele, additional, Lin, Yen-Ting, additional, Louis, Thibaut, additional, Lupton, Robert H., additional, Marsden, Danica, additional, Martocci, Krista, additional, Mauskopf, Phil, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B., additional, Niemack, Michael D., additional, Nolta, Michael R., additional, Page, Lyman A., additional, Parker, Lucas, additional, Partridge, Bruce, additional, Quintana, Hernan, additional, Reid, Beth, additional, Sehgal, Neelima, additional, Sherwin, Blake D., additional, Spergel, David N., additional, Staggs, Suzanne T., additional, Swetz, Daniel S., additional, Switzer, Eric R., additional, Thornton, Robert, additional, Trac, Hy, additional, Tucker, Carole, additional, Warne, Ryan, additional, Wilson, Grant, additional, Wollack, Ed, additional, and Zhao, Yue, additional

Published
2012
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221. Scaling the summit of the submillimetre: instrument performance of SCUBA-2

Author

Bintley, Dan, primary, MacIntosh, Michael J., additional, Holland, Wayne S., additional, Dempsey, Jessica T., additional, Friberg, Per, additional, Kuroda, John T., additional, Starman, Erik G., additional, Thomas, Holly S., additional, Walther, Craig, additional, Gao, Xiaofeng, additional, Ade, Peter A. R., additional, Sudiwala, Rashmi V., additional, Dunare, Camelia, additional, Parkes, William, additional, Walton, Anthony J., additional, Irwin, Kent D., additional, Hilton, Gene C., additional, Niemack, Michael, additional, Amiri, Mandana, additional, Asboth, Viktoria, additional, Burger, Bryce, additional, Chapin, Edward L., additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, and Woodcraft, Adam L., additional

Published
2012
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225. THE ATACAMA COSMOLOGY TELESCOPE: CALIBRATION WITH THEWILKINSON MICROWAVE ANISOTROPY PROBEUSING CROSS-CORRELATIONS

Author

Hajian, Amir, primary, Acquaviva, Viviana, additional, Ade, Peter A. R., additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John William, additional, Barrientos, L. Felipe, additional, Battistelli, Elia S., additional, Bond, John R., additional, Brown, Ben, additional, Burger, Bryce, additional, Chervenak, Jay, additional, Das, Sudeep, additional, Devlin, Mark J., additional, Dicker, Simon R., additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Dünner, Rolando, additional, Essinger-Hileman, Thomas, additional, Fisher, Ryan P., additional, Fowler, Joseph W., additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hernández-Monteagudo, Carlos, additional, Hilton, Gene C., additional, Hilton, Matt, additional, Hincks, Adam D., additional, Hlozek, Renée, additional, Huffenberger, Kevin M., additional, Hughes, David H., additional, Hughes, John P., additional, Infante, Leopoldo, additional, Irwin, Kent D., additional, Juin, Jean Baptiste, additional, Kaul, Madhuri, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M., additional, Limon, Michele, additional, Lin, Yen-Ting, additional, Lupton, Robert H., additional, Marriage, Tobias A., additional, Marsden, Danica, additional, Mauskopf, Phil, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B., additional, Niemack, Michael D., additional, Nolta, Michael R., additional, Page, Lyman A., additional, Parker, Lucas, additional, Partridge, Bruce, additional, Reid, Beth, additional, Sehgal, Neelima, additional, Sherwin, Blake D., additional, Sievers, Jon, additional, Spergel, David N., additional, Staggs, Suzanne T., additional, Swetz, Daniel S., additional, Switzer, Eric R., additional, Thornton, Robert, additional, Trac, Hy, additional, Tucker, Carole, additional, Warne, Ryan, additional, Wollack, Ed, additional, and Zhao, Yue, additional

Published
2011
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227. THE ATACAMA COSMOLOGY TELESCOPE: COSMOLOGY FROM GALAXY CLUSTERS DETECTED VIA THE SUNYAEV-ZEL'DOVICH EFFECT

Author

Sehgal, Neelima, primary, Trac, Hy, additional, Acquaviva, Viviana, additional, Ade, Peter A. R., additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John W., additional, Barrientos, L. Felipe, additional, Battistelli, Elia S., additional, Bond, J. Richard, additional, Brown, Ben, additional, Burger, Bryce, additional, Chervenak, Jay, additional, Das, Sudeep, additional, Devlin, Mark J., additional, Dicker, Simon R., additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Dünner, Rolando, additional, Essinger-Hileman, Thomas, additional, Fisher, Ryan P., additional, Fowler, Joseph W., additional, Hajian, Amir, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hernández-Monteagudo, Carlos, additional, Hilton, Gene C., additional, Hilton, Matt, additional, Hincks, Adam D., additional, Hlozek, Renée, additional, Holtz, David, additional, Huffenberger, Kevin M., additional, Hughes, David H., additional, Hughes, John P., additional, Infante, Leopoldo, additional, Irwin, Kent D., additional, Jones, Andrew, additional, Juin, Jean Baptiste, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M., additional, Limon, Michele, additional, Lin, Yen-Ting, additional, Lupton, Robert H., additional, Marriage, Tobias A., additional, Marsden, Danica, additional, Martocci, Krista, additional, Mauskopf, Phil, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B., additional, Niemack, Michael D., additional, Nolta, Michael R., additional, Page, Lyman A., additional, Parker, Lucas, additional, Partridge, Bruce, additional, Reid, Beth, additional, Sherwin, Blake D., additional, Sievers, Jon, additional, Spergel, David N., additional, Staggs, Suzanne T., additional, Swetz, Daniel S., additional, Switzer, Eric R., additional, Thornton, Robert, additional, Tucker, Carole, additional, Warne, Ryan, additional, Wollack, Ed, additional, and Zhao, Yue, additional

Published
2011
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228. THE ATACAMA COSMOLOGY TELESCOPE: EXTRAGALACTIC SOURCES AT 148 GHz IN THE 2008 SURVEY

Author

Marriage, Tobias A., primary, Juin, Jean Baptiste, additional, Lin, Yen-Ting, additional, Marsden, Danica, additional, Nolta, Michael R., additional, Partridge, Bruce, additional, Ade, Peter A. R., additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John William, additional, Barrientos, L. Felipe, additional, Battistelli, Elia S., additional, Bond, John R., additional, Brown, Ben, additional, Burger, Bryce, additional, Chervenak, Jay, additional, Das, Sudeep, additional, Devlin, Mark J., additional, Dicker, Simon R., additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Dünner, Rolando, additional, Essinger-Hileman, Thomas, additional, Fisher, Ryan P., additional, Fowler, Joseph W., additional, Hajian, Amir, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hernández-Monteagudo, Carlos, additional, Hilton, Gene C., additional, Hilton, Matt, additional, Hincks, Adam D., additional, Hlozek, Renée, additional, Huffenberger, Kevin M., additional, Hughes, David Handel, additional, Hughes, John P., additional, Infante, Leopoldo, additional, Irwin, Kent D., additional, Kaul, Madhuri, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M., additional, Limon, Michele, additional, Lupton, Robert H., additional, Martocci, Krista, additional, Mauskopf, Phil, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B., additional, Niemack, Michael D., additional, Page, Lyman A., additional, Parker, Lucas, additional, Quintana, Hernan, additional, Reid, Beth, additional, Sehgal, Neelima, additional, Sherwin, Blake D., additional, Sievers, Jon, additional, Spergel, David N., additional, Staggs, Suzanne T., additional, Swetz, Daniel S., additional, Switzer, Eric R., additional, Thornton, Robert, additional, Trac, Hy, additional, Tucker, Carole, additional, Warne, Ryan, additional, Wilson, Grant, additional, Wollack, Ed, additional, and Zhao, Yue, additional

Published
2011
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229. THE ATACAMA COSMOLOGY TELESCOPE: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM AT 148 AND 218 GHz FROM THE 2008 SOUTHERN SURVEY

Author

Das, Sudeep, primary, Marriage, Tobias A., additional, Ade, Peter A. R., additional, Aguirre, Paula, additional, Amiri, Mandana, additional, Appel, John W., additional, Barrientos, L. Felipe, additional, Battistelli, Elia S., additional, Bond, John R., additional, Brown, Ben, additional, Burger, Bryce, additional, Chervenak, Jay, additional, Devlin, Mark J., additional, Dicker, Simon R., additional, Doriese, W. Bertrand, additional, Dunkley, Joanna, additional, Dünner, Rolando, additional, Essinger-Hileman, Thomas, additional, Fisher, Ryan P., additional, Fowler, Joseph W., additional, Hajian, Amir, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hernández-Monteagudo, Carlos, additional, Hilton, Gene C., additional, Hilton, Matt, additional, Hincks, Adam D., additional, Hlozek, Renée, additional, Huffenberger, Kevin M., additional, Hughes, David H., additional, Hughes, John P., additional, Infante, Leopoldo, additional, Irwin, Kent D., additional, Juin, Jean Baptiste, additional, Kaul, Madhuri, additional, Klein, Jeff, additional, Kosowsky, Arthur, additional, Lau, Judy M., additional, Limon, Michele, additional, Lin, Yen-Ting, additional, Lupton, Robert H., additional, Marsden, Danica, additional, Martocci, Krista, additional, Mauskopf, Phil, additional, Menanteau, Felipe, additional, Moodley, Kavilan, additional, Moseley, Harvey, additional, Netterfield, Calvin B., additional, Niemack, Michael D., additional, Nolta, Michael R., additional, Page, Lyman A., additional, Parker, Lucas, additional, Partridge, Bruce, additional, Reid, Beth, additional, Sehgal, Neelima, additional, Sherwin, Blake D., additional, Sievers, Jon, additional, Spergel, David N., additional, Staggs, Suzanne T., additional, Swetz, Daniel S., additional, Switzer, Eric R., additional, Thornton, Robert, additional, Trac, Hy, additional, Tucker, Carole, additional, Warne, Ryan, additional, Wollack, Ed, additional, and Zhao, Yue, additional

Published
2011
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230. Characterising and calibrating the SCUBA-2 superconducting bolometer arrays for science observing

Author

Bintley, Dan, primary, Friberg, Per, additional, MacIntosh, Michael J., additional, Holland, Wayne S., additional, Berry, David, additional, Dempsey, Jessica T., additional, Thomas, Holly S., additional, Jenness, Tim, additional, Kelly, Dennis, additional, Gao, Xiaofeng, additional, Ade, Peter A. R., additional, Grainger, William, additional, Moncelsi, Lorenzo, additional, Irwin, Kent D., additional, Hilton, Gene C., additional, Niemack, Michael, additional, Reintsema, Carl D., additional, Hollister, Matthew I., additional, Woodcraft, Adam, additional, Amiri, Mandana, additional, Burger, Bryce, additional, Chapin, Ed, additional, Gibb, Andy, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, and Scott, Douglas, additional

Published
2010
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231. Characterising the SCUBA-2 superconducting bolometer arrays

Author

Bintley, Dan, primary, MacIntosh, Michael J., additional, Holland, Wayne S., additional, Friberg, Per, additional, Walther, Craig, additional, Atkinson, David, additional, Kelly, Dennis, additional, Gao, Xiaofeng, additional, Ade, Peter A. R., additional, Grainger, William, additional, House, Julian, additional, Moncelsi, Lorenzo, additional, Hollister, Matthew I., additional, Woodcraft, Adam, additional, Dunare, Camelia, additional, Parkes, William, additional, Walton, Anthony J., additional, Irwin, Kent D., additional, Hilton, Gene C., additional, Niemack, Michael, additional, Reintsema, Carl D., additional, Amiri, Mandana, additional, Burger, Bryce, additional, Halpern, Mark, additional, Hasselfield, Matthew, additional, Hill, Jeff, additional, Kycia, J. B., additional, Mugford, C. G. A., additional, and Persaud, Lauren, additional

Published
2010
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232. Modeling and characterization of the SPIDER half-wave plate

Author

Bryan, Sean A., primary, Ade, Peter A. R., additional, Amiri, Mandana, additional, Benton, Steve, additional, Bihary, Richard, additional, Bock, James J., additional, Bond, J. Richard, additional, Bonetti, Joseph A., additional, Chiang, H. Cynthia, additional, Contaldi, Carlo R., additional, Crill, Brendan P., additional, O'Dea, Daniel, additional, Dore, Olivier, additional, Farhang, Marzieh, additional, Filippini, Jeffrey P., additional, Fissel, Laura, additional, Gandilo, Natalie, additional, Golwala, Sunil, additional, Gudmundsson, Jon E., additional, Hasselfield, Matthew, additional, Halpern, Mark, additional, Helson, Kyle R., additional, Hilton, Gene, additional, Holmes, Warren, additional, Hristov, Viktor V., additional, Irwin, Kent D., additional, Jones, William C., additional, Kuo, Chao Lin, additional, MacTavish, Carrie J., additional, Mason, Peter, additional, Morford, Tracy, additional, Montroy, Thomas E., additional, Netterfield, C. Barth, additional, Rahlin, Alexandra S., additional, Reintsema, Carl D., additional, Riley, Daniel, additional, Ruhl, John E., additional, Runyan, Marcus C., additional, Schenker, Matthew A., additional, Shariff, Jamil, additional, Soler, Juan Diego, additional, Transrud, Amy, additional, Tucker, Rebecca, additional, Tucker, Carole, additional, and Turner, Anthony, additional

Published
2010
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235. Photocatalytic aspect of rGO/MnFe2O4 as an efficient magnetically retrievable catalyst for reduction of nitroaromatic compounds under visible-light irradiation.

Author

Fuladi, Vida, Bezaatpour, Abolfazl, Azizian-Kalandaragh, Yashar, Amiri, Mandana, Nuri, Ayat, Nouhi, Sima, Taffa, Dereje H., and Wark, Michael

Subjects
NITROAROMATIC compounds, PHOTOREDUCTION, CATALYSTS, GRAPHENE oxide, WASTE recycling, IRRADIATION
Abstract

In this work a binary photocatalyst of rGO and MnFe 2 O 4 was prepared completely using one-pot hydrothermal simple method. In this way, in a reaction vessel, graphene oxide was reduced and at the same time, MnFe 2 O 4 nanoparticles were formed on its surface. The obtained catalyst was characterized by N 2 adsorption, FT-IR, XPS, HRTEM, XRD, FESEM and VSM physicochemical techniques. The rGO/MnFe 2 O 4 -50 % exhibits high photocatalytic efficiency for reduction of nitroaromatic compounds given to corresponding amines at ambient temperature. In this study, the kinetic parameter (k) of the reduction reaction was investigated. The catalyst was especially excellent in conversion of 1, 4-dinitrobenzene (99 % in 30 min), 4-bromonitrobenzene (100 % in 60 min) and 4-chloronitrobenzene (100 % in 70 min). In addition to the photocatalytic behavior of rGO/MnFe 2 O 4 -50 %, the recyclability of MnFe 2 O 4 was exploited and the catalyst was used for a number of times in the nitrobenzene photocatalytic test without observing a significant decreasing in efficiency. • An efficient catalyst for photoreduction of various nitroaromatic compounds. • Robust catalyst in photoreduction of nitrobenzene in comparison with the literature. • Magnetically recovery of catalyst from the reaction and using it for several times without significant loss of ability. • Photoreduction of nitroaromatic compounds at ambient temperature. • Kinetic investigation on photocatalytic reduction of nitrobenzene. [ABSTRACT FROM AUTHOR]

Published
2022
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237. Automatic setup of SCUBA-2 detector arrays

Author

Gao, Xiaofeng, primary, Kelly, Dennis, additional, Holland, Wayne S., additional, MacIntosh, Michael J., additional, Lunney, David, additional, Bintley, Dan, additional, Hilton, Gene C., additional, Irwin, Kent D., additional, Reintsema, Carl D., additional, Amiri, Mandana, additional, Burger, Bryce, additional, and Halpern, Mark, additional

Published
2008
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239. Facile synthesis of silver nanostructures by using various deposition potential and time: A nonenzymetic sensor for hydrogen peroxide.

Author

Amiri, Mandana, Nouhi, Sima, and Azizian-Kalandaragh, Yashar

Subjects
*SILVER nanoparticles, *NANOSTRUCTURES, *ELECTROCHEMISTRY, *INDIUM tin oxide, *SCANNING electron microscopy
Abstract

Silver nanostructures have been successfully fabricated by using electrodeposition method onto indiumtinoxide (ITO) substrate. Scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and ultraviolet–visible spectroscopy (UV–Vis) techniques were employed for characterization of silver nanostructures. The results show nanostructures with different morphology and electrochemical properties can be obtained by various deposition potentials and times. Electrochemical behavior of the nanostructures has been studied by using cyclic voltammetry. Silver nanostructures exhibits good electrocatalytic activity towards the reduction of H 2 O 2 . The presented electrode can be employed as sensing element for hydrogen peroxide. [ABSTRACT FROM AUTHOR]

Published
2015
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244. Low-pressure CO2fixation with epoxides via a new modified nano crystalline NH2-MIL-101(Cr) in Solvent-free and cocatalyst free condition

Author

Bezaatpour, Abolfazl, Amiri, Mandana, Vocke, Heinrich, Bottke, Patrick, Zastrau, May-Franzis, Weers, Marco, and Wark, Michael

Abstract

Incorporation of appropriate Lewis acid centers such as Cr3+and nucleophilic ionic species such as Br-as assistants in the opening of epoxy rings, on the metal-organic frameworks can be considered an efficient catalyst in a CO2fixation processes. In this research work, we introduce a new catalyst by modifying the metal-organic framework and creating the ammonium salt with bromide, TEAB-MIL-101(Cr). The catalyst was characterized using several appropriate techniques and used as catalyst in the CO2fixation reaction of a large number of epoxides. The catalytic reaction was pushed forward under solvent and cocatalyst-free conditions at 1.5 bar of CO2. The catalyst showed high activity in the presence of most epoxides, but the best result was related to epichlorohydrin, which showed 99 % conversion and 96 % selectivity to the respective cyclic carbonate within 3 h. The prepared catalyst was easily recovered and reused to the catalytic process for at least fifth times without any noticeable change in activity.

Published
2023
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245. Automatic setup of SCUBA-2 detector arrays.

Author

Gao, Xiaofeng, Kelly, Dennis, Holland, Wayne S., MacIntosh, Michael J., Lunney, David, Bintley, Dan, Hilton, Gene C., Irwin, Kent D., Reintsema, Carl D., Amiri, Mandana, Burger, Bryce, and Halpern, Mark

Published
2008
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246. Characterization of a prototype SCUBA-2 1280-pixel submillimetre superconducting bolometer array.

Author

Woodcraft, Adam L., Hollister, Matthew I., Bintley, Dan, Ellis, Maureen A., Gao, Xiaofeng, Holland, Wayne S., MacIntosh, Michael J., Ade, Peter A. R., House, Julian S., Hunt, Cynthia L., Sudiwala, Rashmi V., Duncan, William D., Hilton, Gene C., Irwin, Kent D., Reintsema, Carl D., Dunare, Camelia C., Parkes, William, Walton, Anthony J., Kycia, Jan B., and Amiri, Mandana

Published
2006
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247. Holographic beam mapping of the CHIME pathfinder array

Author

Hall, Helen J., Gilmozzi, Roberto, Marshall, Heather K., Berger, Philippe, Newburgh, Laura B., Amiri, Mandana, Bandura, Kevin, Cliche, Jean-François, Connor, Liam, Deng, Meiling, Denman, Nolan, Dobbs, Matt, Fandino, Mateus, Gilbert, Adam J., Good, Deborah, Halpern, Mark, Hanna, David, Hincks, Adam D., Hinshaw, Gary, Höfer, Carolin, Johnson, Andre M., Landecker, Tom L., Masui, Kiyoshi W., Mena Parra, Juan, Oppermann, Niels, Pen, Ue-Li, Peterson, Jeffrey B., Recnik, Andre, Robishaw, Timothy, Shaw, J. Richard, Siegel, Seth, Sigurdson, Kris, Smith, Kendrick, Storer, Emilie, Tretyakov, Ian, Van Gassen, Kwinten, Vanderlinde, Keith, and Wiebe, Donald

Published
2016
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248. Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Author

Holland, Wayne S., Zmuidzinas, Jonas, Henderson, Shawn W., Stevens, Jason R., Amiri, Mandana, Austermann, Jason, Beall, James A., Chaudhuri, Saptarshi, Cho, Hsiao-Mei, Choi, Steve K., Cothard, Nicholas F., Crowley, Kevin T., Duff, Shannon M., Fitzgerald, Colin P., Gallardo, Patricio A., Halpern, Mark, Hasselfield, Matthew, Hilton, Gene, Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Irwin, Kent D., Koopman, Brian J., Li, Dale, Li, Yaqiong, McMahon, Jeff, Nati, Federico, Niemack, Michael, Reintsema, Carl D., Salatino, Maria, Schillaci, Alessandro, Schmitt, Benjamin L., Simon, Sara M., Staggs, Suzanne T., Vavagiakis, Eve M., and Ward, Jonathan T.

Published
2016
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249. THE SECOND-GENERATION z (REDSHIFT) AND EARLY UNIVERSE SPECTROMETER. I. FIRST-LIGHT OBSERVATION OF A HIGHLY LENSED LOCAL-ULIRG ANALOG AT HIGH-z.

Author

Ferkinhoff, Carl, Brisbin, Drew, Parshley, Stephen, Nikola, Thomas, Stacey, Gordon J., Schoenwald, Justin, Higdon, James L., Higdon, Sarah J. U., Verma, Aprajita, Riechers, Dominik, Hailey-Dunsheath, Steven, Menten, Karl M., Güsten, Rolf, Weiß, Axel, Irwin, Kent, Cho, Hsiao M., Niemack, Michael, Halpern, Mark, Amiri, Mandana, and Hasselfield, Matthew

Subjects
GALACTIC redshift, SPECTROMETERS, BOLOMETERS, GALAXY formation, STARBURSTS, ULTRAVIOLET radiation
Abstract

We recently commissioned our new spectrometer, the second-generation z(Redshift) and Early Universe Spectrometer (ZEUS-2) on the Atacama Pathfinder Experiment telescope. ZEUS-2 is a submillimeter grating spectrometer optimized for detecting the faint and broad lines from distant galaxies that are redshifted into the telluric windows from 200 to 850 μm. It uses a focal plane array of transition-edge sensed bolometers, the first use of these arrays for astrophysical spectroscopy. ZEUS-2 promises to be an important tool for studying galaxies in the years to come because of its synergy with Atacama Large Millimeter Array and its capabilities in the short submillimeter windows that are unique in the post-Herschel era. Here, we report on our first detection of the [C II] 158 μm line with ZEUS-2. We detect the line at z ∼ 1.8 from H-ATLAS J091043.1–000322 with a line flux of (6.44 ± 0.42) × 10–18 W m–2. Combined with its far-IR luminosity and a new Herschel-PACS detection of the [O I] 63 μm line, we model the line emission as coming from a photo-dissociation region with far-ultraviolet radiation field, G ∼ 2 × 104G0, gas density, n ∼ 1 × 103 cm–3 and size between ∼0.4 and 1 kpc. On the basis of this model, we conclude that H-ATLAS J091043.1–000322 is a high-redshift analog of a local ultra-luminous IR galaxy; i.e., it is likely the site of a compact starburst caused by a major merger. Further identification of these merging systems is important for constraining galaxy formation and evolution models. [ABSTRACT FROM AUTHOR]

Published
2014
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250. One-Pot Synthesis of Ni-MOF/Co-MOF Hybrid as Electrocatalyst for Oxygen Evolution Reaction

Author

Sprengel, Simon, Amiri, Mandana, Bezaatpour, Abolfazl, Nouhi, Sima, Baues, Svenja, Wittstock, Gunther, and Wark, Michael

Abstract

This approach suggests a hybrid bimetallic organic frameworks (H-biMOF) as electrocatalyst for the oxygen evolution reaction (OER) under alkaline conditions. A H-biMOF including cobalt (II) and nickel (II) was synthesized with terephthalic acid (Tp) as a linker using one-pot solvothermal method. The morphological study with microscopy techniques shows hexagonal rod-like structures for pure cobalt MOF, wood-shaving-like structures for pure nickel MOF and hexagonal nanosheets coated by wood-shaving-like structures with for H-biMOF. The structure of H-biMOF was confirmed by XRD showing both pure Co and Ni MOFs in the pattern. The catalytic OER ability of all samples was evaluated using electrochemical methods. The best performance was achieved for a H-biMOF made from a 3:1 starting salt ratio of cobalt and nickel (CoTp 3:1(Ni)). The OER catalytic activity of CoTp 3:1(Ni) demonstrates a low overpotential of 371 mV and a Tafel slope of 53.6 mV dec−1(at a current density of 10 mA cm−2). The high catalytic activity of the biMOF through OER is related to the high number of active sites and suitable mass transport properties providing reactatnts to increase the current density at a given potential.

Published
2022
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