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  1. Article ; Online: Development of a pulsed vacuum ultraviolet light source with adjustable intensity.

    McDonald, A D / Febbraro, M / Asaadi, J / Havener, C C

    The Review of scientific instruments

    2022  Volume 93, Issue 5, Page(s) 53103

    Abstract: This paper describes the development of a pulsed light source using the discharge from an electrode in a medium of various noble gases. This source can be used to aid in the characterization and testing of new vacuum-ultraviolet sensitive light detection ...

    Abstract This paper describes the development of a pulsed light source using the discharge from an electrode in a medium of various noble gases. This source can be used to aid in the characterization and testing of new vacuum-ultraviolet sensitive light detection devices. The source includes a novel spark driver circuit, a spark chamber into which different noble gases can be introduced, and an optical attenuation cell capable of being filled with different gases to allow for the attenuation of the pulsed light down to single photon levels. We describe the construction, calibration, and characterization of this device deployed at a dedicated light detection test stand at Oak Ridge National Laboratory.
    Language English
    Publishing date 2022-05-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/5.0081175
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online: First principles studies of the surface and opto-electronic properties of ultra-thin t-Se

    Barman, S. K. / Huda, M. N. / Asaadi, J. / Gramellini, E. / Nygren, D.

    2021  

    Abstract: Selenium is a crucial earth-abundant and non-toxic semiconductor with a wide range of applications across the semiconductor industries. Selenium has drawn attention from scientific communities for its wide range of applicability: from photovoltaics to ... ...

    Abstract Selenium is a crucial earth-abundant and non-toxic semiconductor with a wide range of applications across the semiconductor industries. Selenium has drawn attention from scientific communities for its wide range of applicability: from photovoltaics to imaging devices. Its usage as a photosensitive material largely involves the synthesis of the amorphous phase (a-Se) via various experimental techniques. However, the ground state crystalline phase of this material, known as the trigonal selenium (\textit{t}-Se), is not extensively studied for its optimum electronic and optical properties. In this work, we present density functional theory (DFT) based systematic studies on the ultra-thin $(10\overline{1}0)$ surface slabs of \textit{t}-Se. We report the surface energies, work function, electronic and optical properties as a function of number of layers for $(10\overline{1}0)$ surface slabs to access its suitability for applications as a photosensitive material.
    Keywords Condensed Matter - Materials Science ; Physics - Instrumentation and Detectors
    Subject code 530
    Publishing date 2021-04-29
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Surface and Optoelectronic Properties of Ultrathin Trigonal Selenium: A Density Functional Theory Study with van der Waals Correction.

    Barman, Sajib K / Huda, Muhammad N / Asaadi, Jonathan / Gramellini, Elena / Nygren, David

    Langmuir : the ACS journal of surfaces and colloids

    2022  Volume 38, Issue 28, Page(s) 8485–8494

    Abstract: Selenium is an important earth-abundant and nontoxic semiconductor with numerous applications across semiconductor industries. Selenium has drawn attention from scientific communities for photovoltaics and imaging devices. Its usage as a photosensitive ... ...

    Abstract Selenium is an important earth-abundant and nontoxic semiconductor with numerous applications across semiconductor industries. Selenium has drawn attention from scientific communities for photovoltaics and imaging devices. Its usage as a photosensitive material largely involves the synthesis of the amorphous phase (
    Language English
    Publishing date 2022-07-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.1c02935
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Measurement and analysis of the Doppler broadened energy spectra of annihilation gamma radiation originating from clean and adsorbate-covered surfaces

    Lotfimarangloo, S. / Chirayath, V. A. / Sterne, P. A. / Mahdy, H. / Gladen, R. W. / Driscoll, J. / Rooks, M. / Chrysler, M. / Koymen, A. R. / Asaadi, J. / Weiss, A. H.

    2023  

    Abstract: We present measurements and theoretical modeling demonstrating the capability of Doppler Broadened annihilation gamma Spectroscopy (DBS) to provide element-specific information from the topmost atomic layer of surfaces that are either clean or covered ... ...

    Abstract We present measurements and theoretical modeling demonstrating the capability of Doppler Broadened annihilation gamma Spectroscopy (DBS) to provide element-specific information from the topmost atomic layer of surfaces that are either clean or covered with adsorbates or thin films. Our measurements show that the energy spectra of Doppler-shifted annihilation gamma photons emitted following the annihilation of positrons from the topmost atomic layers of clean gold (Au) and copper (Cu) differ significantly. With the aid of the positron annihilation-induced Auger electron spectroscopy (PAES) performed simultaneously with DBS, we show that measurable differences between the Doppler broadened gamma spectra from Au and Cu surfaces in the high energy region of the gamma spectra can be used for the quantification of surface chemical composition. Modeling the measured Doppler spectra from clean Au and Cu surfaces using gamma spectra obtained from ab initio calculations after considering the detector energy resolution and surface positronium formation pointed to an increase in the relative contribution of gamma from positron annihilation with valence shell electrons. The fit result also suggests that the surface-trapped positrons predominantly annihilated with the delocalized valence shell (s and p) electrons that extended into the vacuum as compared to the highly localized d electrons. Simultaneous DBS and PAES measurements from adsorbate (sulfur, oxygen, carbon) or thin film (selenium (Se), graphene) covered Cu surface showed that it is possible to distinguish and quantify the surface adsorbate and thin-film composition just based on DBS. DBS of elemental surfaces presents a promising avenue for developing a characterization tool that can be used to probe external and internal surfaces that are inaccessible by conventional surface science techniques.
    Keywords Condensed Matter - Other Condensed Matter ; Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2023-12-31
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses m_{N}=280-970  MeV.

    Acciarri, R / Adams, C / Asaadi, J / Baller, B / Basque, V / Cavanna, F / de Gouvêa, A / Fitzpatrick, R S / Fleming, B / Green, P / James, C / Kelly, K J / Lepetic, I / Luo, X / Palamara, O / Scanavini, G / Soderberg, M / Spitz, J / Szelc, A M /
    Wu, W / Yang, T

    Physical review letters

    2021  Volume 127, Issue 12, Page(s) 121801

    Abstract: A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ^{+}μ^{-}, considering decays occurring both inside ArgoNeuT and in the upstream cavern. ...

    Abstract A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ^{+}μ^{-}, considering decays occurring both inside ArgoNeuT and in the upstream cavern. In the data, corresponding to an exposure to 1.25×10^{20}  POT, zero passing events are observed consistent with the expected background. This measurement leads to a new constraint at 90% confidence level on the mixing angle |U_{τN}|^{2} of tau-coupled Dirac heavy neutral leptons with masses m_{N}=280-970  MeV, assuming |U_{eN}|^{2}=|U_{μN}|^{2}=0.
    Language English
    Publishing date 2021-10-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.127.121801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Improved Limits on Millicharged Particles Using the ArgoNeuT Experiment at Fermilab.

    Acciarri, R / Adams, C / Asaadi, J / Baller, B / Bolton, T / Bromberg, C / Cavanna, F / Edmunds, D / Fitzpatrick, R S / Fleming, B / Harnik, R / James, C / Lepetic, I / Littlejohn, B R / Liu, Z / Luo, X / Palamara, O / Scanavini, G / Soderberg, M /
    Spitz, J / Szelc, A M / Wu, W / Yang, T

    Physical review letters

    2020  Volume 124, Issue 13, Page(s) 131801

    Abstract: A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT liquid argon time projection chamber detector ... ...

    Abstract A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT liquid argon time projection chamber detector enables a search for millicharged particles through the detection of visible electron recoils. We search for an event signature with two soft hits (MeV-scale energy depositions) aligned with the upstream target. For an exposure of the detector of 1.0×10^{20} protons on target, one candidate event has been observed, compatible with the expected background. This search is sensitive to millicharged particles with charges between 10^{-3}e and 10^{-1}e and with masses in the range from 0.1 to 3 GeV. This measurement provides leading constraints on millicharged particles in this large unexplored parameter space region.
    Language English
    Publishing date 2020-04-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.131801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book ; Online: Testing of High Voltage Surge Protection Devices for Use in Liquid Argon TPC Detectors

    Asaadi, J. / Conrad, J. M. / Gollapinni, S. / Jones, B. J. P. / Jostlein, H. / John, J. M. St. / Strauss, T. / Wolbers, S. / Zennamo, J.

    2014  

    Abstract: In this paper we demonstrate the capability of high voltage varistors and gas discharge tube arrestors for use as surge protection devices in liquid argon time projection chamber detectors. The insulating and clamping behavior of each type of device is ... ...

    Abstract In this paper we demonstrate the capability of high voltage varistors and gas discharge tube arrestors for use as surge protection devices in liquid argon time projection chamber detectors. The insulating and clamping behavior of each type of device is characterized in air (room temperature), and liquid argon (90~K), and their robustness under high voltage and high energy surges in cryogenic conditions is verified. The protection of vulnerable components in liquid argon during a 150 kV high voltage discharge is also demonstrated. Each device is tested for argon contamination and light emission effects, and both are constrained to levels where no significant impact upon liquid argon time projection chamber functionality is expected. Both devices investigated are shown to be suitable for HV surge protection applications in cryogenic detectors.

    Comment: 22 pages, 18 figures v2: reduced file size for journal submission
    Keywords Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
    Subject code 621
    Publishing date 2014-06-19
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Book ; Online: Novel Approach for Evaluating Detector-Related Uncertainties in a LArTPC Using MicroBooNE Data

    MicroBooNE collaboration / Abratenko, P. / An, R. / Anthony, J. / Arellano, L. / Asaadi, J. / Ashkenazi, A. / Balasubramanian, S. / Baller, B. / Barnes, C. / Barr, G. / Basque, V. / Bathe-Peters, L. / Rodrigues, O. Benevides / Berkman, S. / Bhanderi, A. / Bhat, A. / Bishai, M. / Blake, A. /
    Bolton, T. / Book, J. Y. / Camilleri, L. / Caratelli, D. / Terrazas, I. Caro / Cavanna, F. / Cerati, G. / Chen, Y. / Cianci, D. / Conrad, J. M. / Convery, M. / Cooper-Troendle, L. / Crespo-Anadón, J. I. / Del Tutto, M. / Dennis, S. R. / Detje, P. / Devitt, A. / Diurba, R. / Dorrill, R. / Duffy, K. / Dytman, S. / Eberly, B. / Ereditato, A. / Evans, J. J. / Fine, R. / Aguirre, G. A. Fiorentini / Fitzpatrick, R. S. / Fleming, B. T. / Foppiani, N. / Franco, D. / Furmanski, A. P.

    2021  

    Abstract: Primary challenges for current and future precision neutrino experiments using liquid argon time projection chambers (LArTPCs) include understanding detector effects and quantifying the associated systematic uncertainties. This paper presents a novel ... ...

    Abstract Primary challenges for current and future precision neutrino experiments using liquid argon time projection chambers (LArTPCs) include understanding detector effects and quantifying the associated systematic uncertainties. This paper presents a novel technique for assessing and propagating LArTPC detector-related systematic uncertainties. The technique makes modifications to simulation waveforms based on a parameterization of observed differences in ionization signals from the TPC between data and simulation, while remaining insensitive to the details of the detector model. The modifications are then used to quantify the systematic differences in low- and high-level reconstructed quantities. This approach could be applied to future LArTPC detectors, such as those used in SBN and DUNE.

    Comment: 14 pages, 12 figures, version accepted by EPJ C
    Keywords High Energy Physics - Experiment ; Physics - Instrumentation and Detectors
    Subject code 621
    Publishing date 2021-11-05
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Search for Heavy Neutral Leptons in Electron-Positron and Neutral-Pion Final States with the MicroBooNE Detector.

    Abratenko, P / Alterkait, O / Andrade Aldana, D / Arellano, L / Asaadi, J / Ashkenazi, A / Balasubramanian, S / Baller, B / Barr, G / Barrow, D / Barrow, J / Basque, V / Benevides Rodrigues, O / Berkman, S / Bhanderi, A / Bhat, A / Bhattacharya, M / Bishai, M / Blake, A /
    Bogart, B / Bolton, T / Book, J Y / Brunetti, M B / Camilleri, L / Cao, Y / Caratelli, D / Cavanna, F / Cerati, G / Chappell, A / Chen, Y / Conrad, J M / Convery, M / Cooper-Troendle, L / Crespo-Anadón, J I / Cross, R / Del Tutto, M / Dennis, S R / Detje, P / Devitt, A / Diurba, R / Djurcic, Z / Dorrill, R / Duffy, K / Dytman, S / Eberly, B / Englezos, P / Ereditato, A / Evans, J J / Fine, R / Finnerud, O G / Foreman, W / Fleming, B T / Franco, D / Furmanski, A P / Gao, F / Garcia-Gamez, D / Gardiner, S / Ge, G / Gollapinni, S / Gramellini, E / Green, P / Greenlee, H / Gu, L / Gu, W / Guenette, R / Guzowski, P / Hagaman, L / Hen, O / Hilgenberg, C / Horton-Smith, G A / Imani, Z / Irwin, B / Ismail, M / James, C / Ji, X / Jo, J H / Johnson, R A / Jwa, Y-J / Kalra, D / Kamp, N / Karagiorgi, G / Ketchum, W / Kirby, M / Kobilarcik, T / Kreslo, I / Leibovitch, M B / Lepetic, I / Li, J-Y / Li, K / Li, Y / Lin, K / Littlejohn, B R / Liu, H / Louis, W C / Luo, X / Mariani, C / Marsden, D / Marshall, J / Martinez, N / Martinez Caicedo, D A / Martynenko, S / Mastbaum, A / Mawby, I / McConkey, N / Meddage, V / Micallef, J / Miller, K / Mogan, A / Mohayai, T / Mooney, M / Moor, A F / Moore, C D / Mora Lepin, L / Moudgalya, M M / Mulleriababu, S / Naples, D / Navrer-Agasson, A / Nayak, N / Nebot-Guinot, M / Nowak, J / Oza, N / Palamara, O / Pallat, N / Paolone, V / Papadopoulou, A / Papavassiliou, V / Parkinson, H B / Pate, S F / Patel, N / Pavlovic, Z / Piasetzky, E / Pophale, I / Qian, X / Raaf, J L / Radeka, V / Rafique, A / Reggiani-Guzzo, M / Ren, L / Rochester, L / Rodriguez Rondon, J / Rosenberg, M / Ross-Lonergan, M / Rudolf von Rohr, C / Safa, I / Scanavini, G / Schmitz, D W / Schukraft, A / Seligman, W / Shaevitz, M H / Sharankova, R / Shi, J / Snider, E L / Soderberg, M / Söldner-Rembold, S / Spitz, J / Stancari, M / St John, J / Strauss, T / Szelc, A M / Tang, W / Taniuchi, N / Terao, K / Thorpe, C / Torbunov, D / Totani, D / Toups, M / Tsai, Y-T / Tyler, J / Uchida, M A / Usher, T / Viren, B / Weber, M / Wei, H / White, A J / Wolbers, S / Wongjirad, T / Wospakrik, M / Wresilo, K / Wu, W / Yandel, E / Yang, T / Yates, L E / Yu, H W / Zeller, G P / Zennamo, J / Zhang, C

    Physical review letters

    2024  Volume 132, Issue 4, Page(s) 41801

    Abstract: We present the first search for heavy neutral leptons (HNLs) decaying into νe^{+}e^{-} or νπ^{0} final states in a liquid-argon time projection chamber using data collected with the MicroBooNE detector. The data were recorded synchronously with the NuMI ... ...

    Abstract We present the first search for heavy neutral leptons (HNLs) decaying into νe^{+}e^{-} or νπ^{0} final states in a liquid-argon time projection chamber using data collected with the MicroBooNE detector. The data were recorded synchronously with the NuMI neutrino beam from Fermilab's main injector corresponding to a total exposure of 7.01×10^{20} protons on target. We set upper limits at the 90% confidence level on the mixing parameter |U_{μ4}|^{2} in the mass ranges 10≤m_{HNL}≤150  MeV for the νe^{+}e^{-} channel and 150≤m_{HNL}≤245  MeV for the νπ^{0} channel, assuming |U_{e4}|^{2}=|U_{τ4}|^{2}=0. These limits represent the most stringent constraints in the mass range 35<m_{HNL}<175  MeV and the first constraints from a direct search for νπ^{0} decays.<br />
    Language English
    Publishing date 2024-02-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.041801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: First Measurement of η Meson Production in Neutrino Interactions on Argon with MicroBooNE.

    Abratenko, P / Alterkait, O / Andrade Aldana, D / Anthony, J / Arellano, L / Asaadi, J / Ashkenazi, A / Balasubramanian, S / Baller, B / Barr, G / Barrow, J / Basque, V / Benevides Rodrigues, O / Berkman, S / Bhanderi, A / Bhat, A / Bhattacharya, M / Bishai, M / Blake, A /
    Bogart, B / Bolton, T / Book, J Y / Camilleri, L / Cao, Y / Caratelli, D / Caro Terrazas, I / Cavanna, F / Cerati, G / Chen, Y / Conrad, J M / Convery, M / Cooper-Troendle, L / Crespo-Anadón, J I / Del Tutto, M / Dennis, S R / Detje, P / Devitt, A / Diurba, R / Djurcic, Z / Dorrill, R / Duffy, K / Dytman, S / Eberly, B / Englezos, P / Ereditato, A / Evans, J J / Fine, R / Finnerud, O G / Foreman, W / Fleming, B T / Foppiani, N / Franco, D / Furmanski, A P / Garcia-Gamez, D / Gardiner, S / Ge, G / Gollapinni, S / Goodwin, O / Gramellini, E / Green, P / Greenlee, H / Gu, W / Guenette, R / Guzowski, P / Hagaman, L / Hen, O / Hicks, R / Hilgenberg, C / Horton-Smith, G A / Imani, Z / Irwin, B / Itay, R / James, C / Ji, X / Jiang, L / Jo, J H / Johnson, R A / Jwa, Y-J / Kalra, D / Kamp, N / Karagiorgi, G / Ketchum, W / Kirby, M / Kobilarcik, T / Kreslo, I / Leibovitch, M B / Lepetic, I / Li, J-Y / Li, K / Li, Y / Lin, K / Littlejohn, B R / Louis, W C / Luo, X / Mariani, C / Marsden, D / Marshall, J / Martinez, N / Martinez Caicedo, D A / Mason, K / Mastbaum, A / McConkey, N / Meddage, V / Miller, K / Mills, J / Mogan, A / Mohayai, T / Mooney, M / Moor, A F / Moore, C D / Mora Lepin, L / Mulleriababu, S / Naples, D / Navrer-Agasson, A / Nayak, N / Nebot-Guinot, M / Nowak, J / Oza, N / Palamara, O / Pallat, N / Paolone, V / Papadopoulou, A / Papavassiliou, V / Parkinson, H B / Pate, S F / Patel, N / Pavlovic, Z / Piasetzky, E / Ponce-Pinto, I D / Pophale, I / Prince, S / Qian, X / Raaf, J L / Radeka, V / Rafique, A / Reggiani-Guzzo, M / Ren, L / Rochester, L / Rodriguez Rondon, J / Rosenberg, M / Ross-Lonergan, M / Rudolf von Rohr, C / Scanavini, G / Schmitz, D W / Schukraft, A / Seligman, W / Shaevitz, M H / Sharankova, R / Shi, J / Snider, E L / Soderberg, M / Söldner-Rembold, S / Spitz, J / Stancari, M / John, J St / Strauss, T / Sword-Fehlberg, S / Szelc, A M / Tang, W / Taniuchi, N / Terao, K / Thorpe, C / Torbunov, D / Totani, D / Toups, M / Tsai, Y-T / Tyler, J / Uchida, M A / Usher, T / Viren, B / Weber, M / Wei, H / White, A J / Williams, Z / Wolbers, S / Wongjirad, T / Wospakrik, M / Wresilo, K / Wright, N / Wu, W / Yandel, E / Yang, T / Yates, L E / Yu, H W / Zeller, G P / Zennamo, J / Zhang, C

    Physical review letters

    2024  Volume 132, Issue 15, Page(s) 151801

    Abstract: We present a measurement of η production from neutrino interactions on argon with the MicroBooNE detector. The modeling of resonant neutrino interactions on argon is a critical aspect of the neutrino oscillation physics program being carried out by the ... ...

    Abstract We present a measurement of η production from neutrino interactions on argon with the MicroBooNE detector. The modeling of resonant neutrino interactions on argon is a critical aspect of the neutrino oscillation physics program being carried out by the DUNE and Short Baseline Neutrino programs. η production in neutrino interactions provides a powerful new probe of resonant interactions, complementary to pion channels, and is particularly suited to the study of higher-order resonances beyond the Δ(1232). We measure a flux-integrated cross section for neutrino-induced η production on argon of 3.22±0.84(stat)±0.86(syst) 10^{-41}  cm^{2}/nucleon. By demonstrating the successful reconstruction of the two photons resulting from η production, this analysis enables a novel calibration technique for electromagnetic showers in GeV accelerator neutrino experiments.
    Language English
    Publishing date 2024-04-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.151801
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