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21 results on '"Ullom, Joel N"'

1. Detecting and Correcting Gain Jumps in TES Microcalorimeters

Author

Baker, Thomas A., Becker, Daniel T., Fowler, Joseph W., Keller, Mark W., Swetz, Daniel S., and Ullom, Joel N.

Abstract

Arrays of microcalorimeters based on transition-edge sensors (TESs) are being actively deployed to laboratories all over the world. A TES microcalorimeter array produces very large quantities of data and users of these devices have varying levels of experience, so it is important to provide robust software for data acquisition and analysis that can function with minimal user supervision. This software should be capable of addressing common phenomena that can adversely affect spectrum quality. Gain jumping is one such phenomenon that is characterized by abrupt changes in the gain of a device. Left unaddressed, gain jumps can degrade spectra by introducing false peaks. We are not aware of any previously published methods for resetting gain jumps during data acquisition or existing algorithms for correcting data that is degraded by gain jumps. We have developed automated methods for detecting and correcting gain jumps in gamma-ray TES microcalorimeters. We present a procedure for resetting gain jumps during a live data acquisition that involves briefly driving the TES into its normal state using the bias current. We also describe an algorithm for locating gain jumps and identifying unique gain states within existing microcalorimeter data. Finally, we provide a possible approach for correcting gain jumps after they have been identified.

Published
2025
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2. Symmetric Time-Division-Multiplexed SQUID Readout With Two-Layer Switches for Future TES Observatories

Author

Durkin, Malcolm, Backhaus, Scott, Bandler, Simon R., Chervenak, James A., Denison, Ed V., Doriese, William B., Gard, Johnathon D., Hilton, Gene C., Lew, Richard A., Lucas, Tammy J., Reintsema, Carl D., Schmidt, Daniel R., Smith, Stephen J., Ullom, Joel N., Vale, Leila R., Vissers, Michael R., and Wakeham, Nicholas A.

Abstract

Time-division multiplexing (TDM) of transition-edge-sensor (TES) microcalorimeters is being developed as the readout technology for the Athena X-ray integral field unit (X-IFU) and CMB-S4. We present an experimental demonstration of our latest TDM architecture, which has been implemented in a 4-column × 34-row chip that is fully compatible with the X-IFU design specifications. This new “mux21” architecture is designed for differential readout and uses two-layer switches to reduce the number of row-address lines while also incorporating changes that reduce power to roughly 40% and the total number of SQUIDs to half that of TDM chips used in previous publications. With the 160 ns row durations specified for X-IFU, we obtained (2.02 ± 0.03) eV FWHM energy resolution at 5.9 keV in 2-column × 34-row TDM readout of a NASA X-IFU-like TES array, which meets the requirements of X-IFU's energy-resolution budget. Finally, a scaling analysis of our improved TDM readout chain to bolometer applications indicates that multiplexing factors on the scale of several hundred are possible, depending on the readout requirements.

Published
2023
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3. System performance of a cryogenic test-bed for the time-division multiplexing readout for the NewAthena X-ray Integral Field Unit

Author

Vaccaro, Davide, van der Kuur, Jan, van der Hulst, Paul, Vos, Tobias, de Wit, Martin, Gottardi, Luciano, Ravensberg, Kevin, Taralli, Emanuele, Adams, Joseph, Bandler, Simon R., Bennett, Douglas A., Chervenak, James A., Doriese, William B., Durkin, Malcolm, Gard, Jonathon D., Reintsema, Carl D., Sakai, Kazuhiro, Smith, Stephen J., Ullom, Joel N., Wakeham, Nicholas A., den Herder, Jan-Willem A., Jackson, Brian, Khosropanah, Pourya, Gao, Jian-Rong, Roelfsema, Peter, and Simionescu, Aurora

Published
2025
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4. Gamma and Decay Energy Spectroscopy Measurements of Trinitite

Author

Mercer, David J., Koehler, Katrina E., Croce, Mark P., Hoover, Andrew S., Hypes, Philip A., Kozimor, Stosh A., Mocko, Veronika, Saey, Paul R. J., Schmidt, Daniel R., and Ullom, Joel N.

Abstract

AbstractWe report gamma-ray spectroscopy measurements of trinitite samples and analogous samples obtained from detonation sites in Nevada and Semipalatinsk, as well as in situ measurements of topsoil at the Trinity site. We also report the first isotopic composition measurements of trinitite using the novel forensics technique of decay energy spectroscopy (DES) as a complement to traditional forensics techniques. Our gamma spectroscopy and DES measurements are compared to other published results.

Published
2021
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5. The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters

Author

Coppi, Gabriele, Dicker, Simon, Aguirre, James E., Austermann, Jason E., Beall, James A., Clark, Susan E., Cox, Erin G., Devlin, Mark J., Fissel, Laura M., Galitzki, Nicholas, Hensley, Brandon S., Hubmayr, Johannes, Molinari, Sergio, Nati, Federico, Novak, Giles, Schisano, Eugenio, Soler, Juan D., Tucker, Carole E., Ullom, Joel N., Vaskuri, Anna, Vissers, Michael R., Wheeler, Jordan D., and Zannoni, Mario

Abstract

Sensitive wide-field observations of polarized thermal emission from interstellar dust grains will allow astronomers to address key outstanding questions about the life cycle of matter and energy driving the formation of stars and the evolution of galaxies. Stratospheric balloon-borne telescopes can map this polarized emission at far-infrared wavelengths near the peak of the dust thermal spectrum—wavelengths that are inaccessible from the ground. In this paper we address the sensitivity achievable by a Super Pressure Balloon polarimetry mission, using as an example the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) Observatory. By launching from Wanaka, New Zealand, the BLAST Observatory can obtain a 30 days flight with excellent sky coverage—overcoming limitations of past experiments that suffered from short flight duration and/or launch sites with poor coverage of nearby star-forming regions. This proposed polarimetry mission will map large regions of the sky at sub-arcminute resolution, with simultaneous observations at 175, 250, and 350 μm, using a total of 8274 microwave kinetic inductance detectors. Here, we describe the scientific motivation for the BLAST Observatory, the proposed implementation, and the forecasting methods used to predict its sensitivity. We also compare our forecasted experiment sensitivity with other facilities.

Published
2024
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6. Surface-to-Bulk Redox Coupling through Thermally Driven Li Redistribution in Li- and Mn-Rich Layered Cathode Materials

Author

Li, Shaofeng, Lee, Sang-Jun, Wang, Xuelong, Yang, Wanli, Huang, Hai, Swetz, Daniel S., Doriese, William B., O’Neil, Galen C., Ullom, Joel N., Titus, Charles J., Irwin, Kent D., Lee, Han-Koo, Nordlund, Dennis, Pianetta, Piero, Yu, Chang, Qiu, Jieshan, Yu, Xiqian, Yang, Xiao-Qing, Hu, Enyuan, Lee, Jun-Sik, and Liu, Yijin

Abstract

Li- and Mn-rich (LMR) layered cathode materials have demonstrated impressive capacity and specific energy density thanks to their intertwined redox centers including transition metal cations and oxygen anions. Although tremendous efforts have been devoted to the investigation of the electrochemically driven redox evolution in LMR cathode at ambient temperature, their behavior under a mildly elevated temperature (up to ∼100 °C), with or without electrochemical driving force, remains largely unexplored. Here we show a systematic study of the thermally driven surface-to-bulk redox coupling effect in charged Li1.2Ni0.15Co0.1Mn0.55O2. We for the first time observed a charge transfer between the bulk oxygen anions and the surface transition metal cations under ∼100 °C, which is attributed to the thermally driven redistribution of Li ions. This finding highlights the nonequilibrium state and dynamic nature of the LMR material at deeply delithiated state upon a mild temperature perturbation.

Published
2019
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7. Hybrid X-ray Spectroscopy-Based Approach To Acquire Chemical and Structural Information of Single-Walled Carbon Nanotubes with Superior Sensitivity

Author

Sainio, Sami, Wester, Niklas, Titus, Charles J., Liao, Yongping, Zhang, Qiang, Nordlund, Dennis, Sokaras, Dimosthenis, Lee, Sang-jun, Irwin, Kent D., Doriese, William B., O’Neil, Galen C., Swetz, Daniel S., Ullom, Joel N., Kauppinen, Esko I., Laurila, Tomi, and Koskinen, Jari

Abstract

High-resolution nondestructive chemical analysis of both bulk and surface of application-ready carbon nanomaterials is needed to connect the material properties to the observed performance. This is needed to enable application-specific tailoring of carbon nanomaterials. However, detailed studies of effects of oxidizing treatments on the chemical composition and structural integrity of carbon and on the metal seed materials are rare. We show here a hybrid X-ray-based study retrieving this hard-to-access chemical and structural information of application-ready ferrocene-grown single-walled carbon nanotubes and their nitric acid- and oxygen plasma-treated versions. We have executed photoelectron, absorption, and X-ray emission spectroscopy (XES) measurements in the soft X-ray regime providing chemical and structural information with high energy resolution and throughput. We observed that the nitric acid treatment did not significantly alter the chemical state of the carbon matrix, whereas the oxygen plasma treatment was associated with strong effects and chemical conversions toward oxygen-functionalized groups such as carboxyl. Additionally, an Fe catalyst was present before and after the oxidizing treatments at considerable concentrations as detected by both X-ray absorption spectroscopy and XES, with a near complete conversion of Fe2+to Fe3+. Additional minor elements (metals <0.1 at. %) were detected only with XES. With this combined approach, we can study the effect of different treatments on application-ready carbon nanomaterials’ physicochemical and structural properties with unmatched precision, which helps understand the nature of these materials.

Published
2019
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8. Studies of systematic uncertainties for Simons Observatory: detector array effects

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Crowley, Kevin T., Simon, Sara M., Silva-Feaver, Max, Goeckner-Wald, Neil, Ali, Aamir, Austermann, Jason, Brown, Michael L., Chinone, Yuji, Cukierman, Ari, Dober, Bradley, Duff, Shannon M., Dunkley, Jo, Errard, Josquin, Fabbian, Giulio, Gallardo, Patricio A., Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Keating, Brian, Kusaka, Akito, McCallum, Nialh, McMahon, Jeff, Nati, Federico, Niemack, Michael D., Puglisi, Giuseppe, Sathyanarayana Rao, Mayuri, Reichardt, Christian L., Salatino, Maria, Siritanasak, Praween, Staggs, Suzanne, Suzuki, Aritoki, Teply, Grant, Thomas, Daniel B., Ullom, Joel N., Vergès, Clara, Vissers, Michael R., Westbrook, Benjamin, Wollack, Edward J., Xu, Zhilei, and Zhu, Ningfeng

Published
2018
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10. Preflight characterization of the BLAST-TNG receiver and detector arrays

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Lourie, Nathan P., Ade, Peter A. R., Angile, Francisco E., Ashton, Peter C., Austermann, Jason E., Devlin, Mark J., Dober, Bradley, Galitzki, Nicholas, Gao, Jiansong, Gordon, Sam, Groppi, Christopher E., Klein, Jeffrey, Hilton, Gene C., Hubmayr, Johannes, Li, Dale, Lowe, Ian, Mani, Hamdi, Mauskopf, Philip, McKenney, Christopher M., Nati, Federico, Novak, Giles, Pascale, Enzo, Pisano, Giampaolo, Sinclair, Adrian, Soler, Juan D., Tucker, Carole, Ullom, Joel N., Vissers, Michael, and Williams, Paul A.

Published
2018
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11. Performance of the advanced ACTPol low frequency array

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Li, Yaqiong, Austermann, Jason E., Beall, James A., Bruno, Sarah Marie, Choi, Steve K., Cothard, Nicholas F., Crowley, Kevin T., Duff, Shannon M., Gallardo, Patricio A., Henderson, Shawn W., Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Koopman, Brian J., McMahon, Jeff J., Niemack, Michael D., Salatino, Maria, Simon, Sara M., Staggs, Suzanne T., Stevens, Jason R., Ullom, Joel N., Ward, Jonathan, and Wollack, Edward J.

Published
2018
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12. Design of 280 GHz feedhorn-coupled TES arrays for the balloon-borne polarimeter SPIDER

Author

Holland, Wayne S., Zmuidzinas, Jonas, Hubmayr, Johannes, Austermann, Jason E., Beall, James A., Becker, Daniel T., Benton, Steven J., Bergman, A. Stevie, Bond, J. Richard, Bryan, Sean, Duff, Shannon M., Duivenvoorden, Adri J., Eriksen, H. K., Filippini, Jeffrey P., Fraisse, A., Galloway, Mathew, Gambrel, Anne E., Ganga, K., Grigorian, Arpi L., Gualtieri, Riccardo, Gudmundsson, Jon E., Hartley, John W., Halpern, M., Hilton, Gene C., Jones, William C., McMahon, Jeffrey J., Moncelsi, Lorenzo, Nagy, Johanna M., Netterfield, C. B., Osherson, Benjamin, Padilla, Ivan, Rahlin, Alexandra S., Racine, B., Ruhl, John, Rudd, T. M., Shariff, J. A., Soler, J. D., Song, Xue, Ullom, Joel N., Van Lanen, Jeff, Vissers, Michael R., Wehus, I. K., Wen, Shyang, Wiebe, D. V., and Young, Edward

Published
2016
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13. Development of x-ray microcalorimeter imaging spectrometers for the X-ray Surveyor mission concept

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Bandler, Simon R., Adams, Joseph S., Chervenak, James A., Datesman, Aaron M., Eckart, Megan E., Finkbeiner, Fred M., Kelley, Richard L., Kilbourne, Caroline A., Betancourt-Martinez, Gabriele, Miniussi, Antoine R., Porter, Frederick S., Sadleir, John E., Sakai, Kazuhiro, Smith, Stephen J., Stevenson, Thomas R., Wakeham, Nicholas A., Wassell, Edward J., Yoon, Wonsik, Becker, Dan, Bennett, Douglas, Doriese, William B., Fowler, Joseph W., Gard, Johnathan D., Hilton, Gene C., Mates, Benjamin, Morgan, Kelsey M., Reintsema, Carl D., Swetz, Daniel, Ullom, Joel N., Chaudhuri, Saptarshi, Irwin, Kent D., Lee, Sang-Jun, and Vikhlinin, Alexey

Published
2016
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14. The next-generation BLASTPol experiment

Author

Holland, Wayne S., Zmuidzinas, Jonas, Dober, Bradley J., Ade, Peter A. R., Ashton, Peter, Angilè, Francesco E., Beall, James A., Becker, Dan, Bradford, Kristi J., Che, George, Cho, Hsiao-Mei, Devlin, Mark J., Fissel, Laura M., Fukui, Yasuo, Galitzki, Nicholas, Gao, Jiansong, Groppi, Christopher E., Hillbrand, Seth, Hilton, Gene C., Hubmayr, Johannes, Irwin, Kent D., Klein, Jeffrey, Van Lanen, Jeff, Li, Dale, Li, Zhi-Yun, Lourie, Nathan P., Mani, Hamdi, Martin, Peter G., Mauskopf, Philip, Nakamura, Fumitaka, Novak, Giles, Pappas, David P., Pascale, Enzo, Santos, Fabio P., Savini, Giorgio, Scott, Douglas, Stanchfield, Sara, Ullom, Joel N., Underhill, Matthew, Vissers, Michael R., and Ward-Thompson, Derek

Published
2014
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15. A 50 mK test bench for demonstration of the readout chain of Athena/X-IFU

Author

den Herder, Jan-Willem A., Nikzad, Shouleh, Nakazawa, Kazuhiro, Castellani, Florent, Beaumont, Sophie, Pajot, François, Roudil, Gilles, Adams, Joseph, Bandler, Simon, Chervenak, James, Daniel, Christophe, Denison, Edward V., Doriese, W. Bertrand, Dupieux, Michel, Durkin, Malcolm, Geoffray, Hervé, Hilton, Gene C., Murat, David, Parot, Yann, Peille, Philippe, Prêle, Damien, Ravera, Laurent, Reintsema, Carl D., Sakai, Kazuhiro, Stevens, Robert W., Ullom, Joel N., Vale, Leila R., and Wakeham, Nicholas

Published
2022
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17. BoloCalc: a sensitivity calculator for the design of Simons Observatory

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Hill, Charles A., Bruno, Sarah Marie M., Simon, Sara M., Ali, Aamir, Arnold, Kam S., Ashton, Peter C., Barron, Darcy, Bryan, Sean, Chinone, Yuji, Coppi, Gabriele, Crowley, Kevin T., Cukierman, Ari, Dicker, Simon, Dunkley, Jo, Fabbian, Giulio, Galitzki, Nicholas, Gallardo, Patricio A., Gudmundsson, Jon E., Hubmayr, Johannes, Keating, Brian, Kusaka, Akito, Lee, Adrian T., Matsuda, Frederick, Mauskopf, Philip D., McMahon, Jeffrey, Niemack, Michael D., Puglisi, Giuseppe, Sathyanarayana Rao, Mayuri, Salatino, Maria, Sierra, Carlos, Staggs, Suzanne, Suzuki, Aritoki, Teply, Grant, Ullom, Joel N., Westbrook, Benjamin, Xu, Zhilei, and Zhu, Ningfeng

Published
2018
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18. Simons Observatory large aperture telescope receiver design overview

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Zhu, Ningfeng, Orlowski-Scherer, John L., Xu, Zhilei, Ali, Aamir, Arnold, Kam S., Ashton, Peter C., Coppi, Gabriele, Devlin, Mark J., Dicker, Simon, Galitzki, Nicholas, Gallardo, Patricio A., Henderson, Shawn W., Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Keating, Brian, Lee, Adrian T., Limon, Michele, Lungu, Marius, Mauskopf, Philip D., May, Andrew J., McMahon, Jeff, Niemack, Michael D., Piccirillo, Lucio, Puglisi, Giuseppe, Sathyanarayana Rao, Mayuri, Salatino, Maria, Silva-Feaver, Max, Simon, Sara M., Staggs, Suzanne, Thornton, Robert, Ullom, Joel N., Vavagiakis, Eve M., Westbrook, Benjamin, and Wollack, Edward J.

Published
2018
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19. The Simons Observatory: instrument overview

Author

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

Published
2018
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20. Mechanical designs and development of TES bolometer detector arrays for the Advanced ACTPol experiment

Author

Holland, Wayne S., Zmuidzinas, Jonas, Ward, Jonathan T., Austermann, Jason, Beall, James A., Choi, Steve K., Crowley, Kevin T., Devlin, Mark J., Duff, Shannon M., Gallardo, Patricio A., Henderson, Shawn W., Ho, Shuay-Pwu Patty, Hilton, Gene, Hubmayr, Johannes, Khavari, Niloufar, Klein, Jeffrey, Koopman, Brian J., Li, Dale, McMahon, Jeffrey, Mumby, Grace, Nati, Federico, Niemack, Michael D., Page, Lyman A., Salatino, Maria, Schillaci, Alessandro, Schmitt, Benjamin L., Simon, Sara M., Staggs, Suzanne T., Thornton, Robert, Ullom, Joel N., Vavagiakis, Eve M., and Wollack, Edward J.

Published
2016
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21. The Next Generation BLAST Experiment

Author

Galitzki, Nicholas, Ade, Peter A. R., Angilè, Francesco E., Ashton, Peter, Beall, James A., Becker, Dan, Bradford, Kristi J., Che, George, Cho, Hsiao-Mei, Devlin, Mark J., Dober, Bradley J., Fissel, Laura M., Fukui, Yasuo, Gao, Jiansong, Groppi, Christopher E., Hillbrand, Seth, Hilton, Gene C., Hubmayr, Johannes, Irwin, Kent D., Klein, Jeffrey, Van Lanen, Jeff, Li, Dale, Li, Zhi-Yun, Lourie, Nathan P., Mani, Hamdi, Martin, Peter G., Mauskopf, Philip, Nakamura, Fumitaka, Novak, Giles, Pappas, David P., Pascale, Enzo, Pisano, Giampaolo, Santos, Fabio P., Savini, Giorgio, Scott, Douglas, Stanchfield, Sara, Tucker, Carole, Ullom, Joel N., Underhill, Matthew, Vissers, Michael R., and Ward-Thompson, Derek

Abstract

The Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol) was a suborbital experiment designed to map magnetic fields in order to study their role in star formation processes. BLASTPol made detailed polarization maps of a number of molecular clouds during its successful flights from Antarctica in 2010 and 2012. We present the next-generation BLASTPol instrument (BLAST-TNG) that will build off the success of the previous experiment and continue its role as a unique instrument and a test bed for new technologies. With a 16-fold increase in mapping speed, BLAST-TNG will make larger and deeper maps. Major improvements include a 2.5-m carbon fiber mirror that is 40% wider than the BLASTPol mirror and ~3000 polarization sensitive detectors. BLAST-TNG will observe in three bands at 250, 350, and 500 μm. The telescope will serve as a pathfinder project for microwave kinetic inductance detector (MKID) technology, as applied to feedhorn-coupled submillimeter detector arrays. The liquid helium cooled cryostat will have a 28-day hold time and will utilize a closed-cycle 3Herefrigerator to cool the detector arrays to 270 mK. This will enable a detailed mapping of more targets with higher polarization resolution than any other submillimeter experiment to date. BLAST-TNG will also be the first balloon-borne telescope to offer shared risk observing time to the community. This paper outlines the motivation for the project and the instrumental design.

Published
2014
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