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  1. AU="Guzik T.G."
  2. AU="Devi, P"
  3. AU=Clarke Rachel
  4. AU="Bodmer, Nils"
  5. AU="Presles, E"
  6. AU="Zhou, Xiaoyue"
  7. AU="Fillipidis, Theodoros"
  8. AU="Reinke, Rasmus"
  9. AU="Cho, Hyun-Ju"
  10. AU="Jurgen Claassen"
  11. AU="Zhukovskaia, E A"
  12. AU=Yee Rebecca AU=Yee Rebecca
  13. AU="d. S. C. Borges, G."
  14. AU="van Deursen, Alexander Jam"
  15. AU="Wang, Hsiu-Hung"
  16. AU="Mehta, Kedar"
  17. AU="Nelly A. Khachatryan"
  18. AU=Albensi Benedict C.
  19. AU=McRae Simon
  20. AU="Shorubalko, Ivan"
  21. AU="Stewart, Rodney A"
  22. AU="Bakthavatsalu, Maheshwar"
  23. AU="Fussner, Steven"
  24. AU="Dolsten, Mikael"
  25. AU="Sarnyai, Zoltán"
  26. AU=Dongaonkar Ranjeet M
  27. AU="Singh, Leher"
  28. AU="Sevilla Porras, Marta"
  29. AU="Fuller, Chris K"
  30. AU="Vandeloo, Judith"
  31. AU="Meyers, Amanda"
  32. AU="Jiménez-Bambague, Eliana M"
  33. AU="Turner, J C"
  34. AU="Moore, C J" AU="Moore, C J"
  35. AU="Leresche, Téa"
  36. AU=Astrom Siv AU=Astrom Siv
  37. AU="Di Meglio, Florent"
  38. AU=Simon H U
  39. AU=Croucher P I
  40. AU="Jasti, Madhu"

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  1. Artikel ; Online: Abundance and survival of microbial aerosols in the troposphere and stratosphere.

    Bryan, N C / Christner, B C / Guzik, T G / Granger, D J / Stewart, M F

    The ISME journal

    2019  Band 13, Heft 11, Seite(n) 2789–2799

    Abstract: Bioaerosol transport in the atmosphere disperses microbial species between continents, affects human and plant health, and may influence hydrologic cycling. However, there have been few quantitative observations of bioaerosols at altitudes more than a ... ...

    Abstract Bioaerosol transport in the atmosphere disperses microbial species between continents, affects human and plant health, and may influence hydrologic cycling. However, there have been few quantitative observations of bioaerosols at altitudes more than a few kilometers above the surface. Lack of data on bioaerosol distributions in the atmosphere has impeded efforts to assess the aerial dissemination of microbes and their vertical extent in the biosphere. In this study, a helium balloon payload system was used to sample microbial cells and dust particles in air masses as high as 38 km above sea level over three locations in the southwestern United States. The cell concentrations at altitudes between 3 and 29 km were highly similar (2-5 × 10
    Mesh-Begriff(e) Aerosols/analysis ; Air Microbiology ; Altitude ; Atmosphere ; Bacteria/classification ; Bacteria/growth & development ; Bacteria/isolation & purification ; Bacteria/radiation effects ; Dust/analysis ; Ecosystem ; Humans ; Microbial Viability ; Ultraviolet Rays
    Chemische Substanzen Aerosols ; Dust
    Sprache Englisch
    Erscheinungsdatum 2019-07-17
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2406536-5
    ISSN 1751-7370 ; 1751-7362
    ISSN (online) 1751-7370
    ISSN 1751-7362
    DOI 10.1038/s41396-019-0474-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Z 7773: Hefte anzeigen

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  2. Artikel ; Online: A method for sampling microbial aerosols using high altitude balloons.

    Bryan, N C / Stewart, M / Granger, D / Guzik, T G / Christner, B C

    Journal of microbiological methods

    2014  Band 107, Seite(n) 161–168

    Abstract: Owing to the challenges posed to microbial aerosol sampling at high altitudes, very little is known about the abundance, diversity, and extent of microbial taxa in the Earth-atmosphere system. To directly address this knowledge gap, we designed, ... ...

    Abstract Owing to the challenges posed to microbial aerosol sampling at high altitudes, very little is known about the abundance, diversity, and extent of microbial taxa in the Earth-atmosphere system. To directly address this knowledge gap, we designed, constructed, and tested a system that passively samples aerosols during ascent through the atmosphere while tethered to a helium-filled latex sounding balloon. The sampling payload is ~ 2.7 kg and comprised of an electronics box and three sampling chambers (one serving as a procedural control). Each chamber is sealed with retractable doors that can be commanded to open and close at designated altitudes. The payload is deployed together with radio beacons that transmit GPS coordinates (latitude, longitude and altitude) in real time for tracking and recovery. A cut mechanism separates the payload string from the balloon at any desired altitude, returning all equipment safely to the ground on a parachute. When the chambers are opened, aerosol sampling is performed using the Rotorod® collection method (40 rods per chamber), with each rod passing through 0.035 m3 per km of altitude sampled. Based on quality control measurements, the collection of ~ 100 cells rod(-1) provided a 3-sigma confidence level of detection. The payload system described can be mated with any type of balloon platform and provides a tool for characterizing the vertical distribution of microorganisms in the troposphere and stratosphere.
    Mesh-Begriff(e) Air Microbiology/standards ; Altitude ; Microbiological Techniques/instrumentation ; Microbiological Techniques/methods ; Microbiological Techniques/standards
    Sprache Englisch
    Erscheinungsdatum 2014-12
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 604916-3
    ISSN 1872-8359 ; 0167-7012
    ISSN (online) 1872-8359
    ISSN 0167-7012
    DOI 10.1016/j.mimet.2014.10.007
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: The LET spectrum and its uncertainty during the CRRES mission.

    Chenette, D L / Guzik, T G / Wefel, J P

    Advances in space research : the official journal of the Committee on Space Research (COSPAR)

    2000  Band 14, Heft 10, Seite(n) 809–813

    Abstract: We present Linear Energy Transfer (LET) spectra calculated for the 1990-1991 CRRES mission using the galactic cosmic ray (GCR) and solar energetic particle (SEP) models developed for the CRRES/SPACERAD program and presented by Chen, et al. 1992 at this ... ...

    Abstract We present Linear Energy Transfer (LET) spectra calculated for the 1990-1991 CRRES mission using the galactic cosmic ray (GCR) and solar energetic particle (SEP) models developed for the CRRES/SPACERAD program and presented by Chen, et al. 1992 at this conference. We discuss how the spectra vary with changes in the galactic cosmic ray and solar energetic particle models. Finally, we illustrate the application and significance of these results by using them to predict single event upset event rates in a sample integrated circuit memory device, a 256 x 4-bit bipolar static RAM (93L422).
    Mesh-Begriff(e) Cosmic Radiation ; Linear Energy Transfer ; Models, Theoretical ; Solar Activity ; Space Flight ; Spacecraft ; Spectrum Analysis
    Sprache Englisch
    Erscheinungsdatum 2000-11-16
    Erscheinungsland England
    Dokumenttyp Comparative Study ; Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 392339-3
    ISSN 0273-1177
    ISSN 0273-1177
    DOI 10.1016/0273-1177(94)90545-2
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Z 82/701: Hefte anzeigen
    CONF 13: Hefte anzeigen

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  4. Artikel ; Online: Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / de Nolfo, G A / Ebisawa, K / Ficklin, A W /
    Fuke, H / Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / Okuno, S / Ormes, J F / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2023  Band 130, Heft 21, Seite(n) 211001

    Abstract: We present the observation of a charge-sign dependent solar modulation of galactic cosmic rays (GCRs) with the Calorimetric Electron Telescope onboard the International Space Station over 6 yr, corresponding to the positive polarity of the solar magnetic ...

    Abstract We present the observation of a charge-sign dependent solar modulation of galactic cosmic rays (GCRs) with the Calorimetric Electron Telescope onboard the International Space Station over 6 yr, corresponding to the positive polarity of the solar magnetic field. The observed variation of proton count rate is consistent with the neutron monitor count rate, validating our methods for determining the proton count rate. It is observed by the Calorimetric Electron Telescope that both GCR electron and proton count rates at the same average rigidity vary in anticorrelation with the tilt angle of the heliospheric current sheet, while the amplitude of the variation is significantly larger in the electron count rate than in the proton count rate. We show that this observed charge-sign dependence is reproduced by a numerical "drift model" of the GCR transport in the heliosphere. This is a clear signature of the drift effect on the long-term solar modulation observed with a single detector.
    Mesh-Begriff(e) Space Flight ; Protons ; Electrons ; Telescopes ; Cosmic Radiation
    Chemische Substanzen Protons
    Sprache Englisch
    Erscheinungsdatum 2023-06-08
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.211001
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  5. Artikel ; Online: Erratum: Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station [Phys. Rev. Lett. 130, 211001 (2023)].

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / de Nolfo, G A / Ebisawa, K / Ficklin, A W /
    Fuke, H / Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / Okuno, S / Ormes, J F / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2023  Band 131, Heft 10, Seite(n) 109902

    Abstract: This corrects the article DOI: 10.1103/PhysRevLett.130.211001. ...

    Abstract This corrects the article DOI: 10.1103/PhysRevLett.130.211001.
    Sprache Englisch
    Erscheinungsdatum 2023-09-22
    Erscheinungsland United States
    Dokumenttyp Published Erratum
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.109902
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / de Nolfo, G A / Ebisawa, K / Ficklin, A W /
    Fuke, H / Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / Okuno, S / Ormes, J F / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2023  Band 131, Heft 19, Seite(n) 191001

    Abstract: Detailed measurements of the spectral structure of cosmic-ray electrons and positrons from 10.6 GeV to 7.5 TeV are presented from over 7 years of observations with the CALorimetric Electron Telescope (CALET) on the International Space Station. The ... ...

    Abstract Detailed measurements of the spectral structure of cosmic-ray electrons and positrons from 10.6 GeV to 7.5 TeV are presented from over 7 years of observations with the CALorimetric Electron Telescope (CALET) on the International Space Station. The instrument, consisting of a charge detector, an imaging calorimeter, and a total absorption calorimeter with a total depth of 30 radiation lengths at normal incidence and a fine shower imaging capability, is optimized to measure the all-electron spectrum well into the TeV region. Because of the excellent energy resolution (a few percent above 10 GeV) and the outstanding e/p separation (10^{5}), CALET provides optimal performance for a detailed search of structures in the energy spectrum. The analysis uses data up to the end of 2022, and the statistics of observed electron candidates has increased more than 3 times since the last publication in 2018. By adopting an updated boosted decision tree analysis, a sufficient proton rejection power up to 7.5 TeV is achieved, with a residual proton contamination less than 10%. The observed energy spectrum becomes gradually harder in the lower energy region from around 30 GeV, consistently with AMS-02, but from 300 to 600 GeV it is considerably softer than the spectra measured by DAMPE and Fermi-LAT. At high energies, the spectrum presents a sharp break around 1 TeV, with a spectral index change from -3.15 to -3.91, and a broken power law fitting the data in the energy range from 30 GeV to 4.8 TeV better than a single power law with 6.9 sigma significance, which is compatible with the DAMPE results. The break is consistent with the expected effects of radiation loss during the propagation from distant sources (except the highest energy bin). We have fitted the spectrum with a model consistent with the positron flux measured by AMS-02 below 1 TeV and interpreted the electron+positron spectrum with possible contributions from pulsars and nearby sources. Above 4.8 TeV, a possible contribution from known nearby supernova remnants, including Vela, is addressed by an event-by-event analysis providing a higher proton-rejection power than a purely statistical analysis.
    Sprache Englisch
    Erscheinungsdatum 2023-11-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.191001
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  7. Artikel ; Online: Direct Measurement of the Cosmic-Ray Helium Spectrum from 40 GeV to 250 TeV with the Calorimetric Electron Telescope on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / de Nolfo, G A / Ebisawa, K / Ficklin, A W /
    Fuke, H / Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / Okuno, S / Ormes, J F / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2023  Band 130, Heft 17, Seite(n) 171002

    Abstract: We present the results of a direct measurement of the cosmic-ray helium spectrum with the CALET instrument in operation on the International Space Station since 2015. The observation period covered by this analysis spans from October 13, 2015, to April ... ...

    Abstract We present the results of a direct measurement of the cosmic-ray helium spectrum with the CALET instrument in operation on the International Space Station since 2015. The observation period covered by this analysis spans from October 13, 2015, to April 30, 2022 (2392 days). The very wide dynamic range of CALET allowed for the collection of helium data over a large energy interval, from ∼40  GeV to ∼250  TeV, for the first time with a single instrument in low Earth orbit. The measured spectrum shows evidence of a deviation of the flux from a single power law by more than 8σ with a progressive spectral hardening from a few hundred GeV to a few tens of TeV. This result is consistent with the data reported by space instruments including PAMELA, AMS-02, and DAMPE and balloon instruments including CREAM. At higher energy we report the onset of a softening of the helium spectrum around 30 TeV (total kinetic energy). Though affected by large uncertainties in the highest energy bins, the observation of a flux reduction turns out to be consistent with the most recent results of DAMPE. A double broken power law is found to fit simultaneously both spectral features: the hardening (at lower energy) and the softening (at higher energy). A measurement of the proton to helium flux ratio in the energy range from 60  GeV/n to about 60  TeV/n is also presented, using the CALET proton flux recently updated with higher statistics.
    Sprache Englisch
    Erscheinungsdatum 2023-05-12
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.171002
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Direct Measurement of the Nickel Spectrum in Cosmic Rays in the Energy Range from 8.8  GeV/n to 240  GeV/n with CALET on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / Ebisawa, K / Ficklin, A W / Fuke, H /
    Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / de Nolfo, G A / Okuno, S / Ormes, J F / Ospina, N / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2022  Band 128, Heft 13, Seite(n) 131103

    Abstract: The relative abundance of cosmic ray nickel nuclei with respect to iron is by far larger than for all other transiron elements; therefore it provides a favorable opportunity for a low background measurement of its spectrum. Since nickel, as well as iron, ...

    Abstract The relative abundance of cosmic ray nickel nuclei with respect to iron is by far larger than for all other transiron elements; therefore it provides a favorable opportunity for a low background measurement of its spectrum. Since nickel, as well as iron, is one of the most stable nuclei, the nickel energy spectrum and its relative abundance with respect to iron provide important information to estimate the abundances at the cosmic ray source and to model the Galactic propagation of heavy nuclei. However, only a few direct measurements of cosmic-ray nickel at energy larger than ∼3  GeV/n are available at present in the literature, and they are affected by strong limitations in both energy reach and statistics. In this Letter, we present a measurement of the differential energy spectrum of nickel in the energy range from 8.8  to 240  GeV/n, carried out with unprecedented precision by the Calorimetric Electron Telescope (CALET) in operation on the International Space Station since 2015. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number Z=40). The particle's energy is measured by a homogeneous calorimeter (1.2 proton interaction lengths, 27 radiation lengths) preceded by a thin imaging section (3 radiation lengths) providing tracking and energy sampling. This Letter follows our previous measurement of the iron spectrum [1O. Adriani et al. (CALET Collaboration), Phys. Rev. Lett. 126, 241101 (2021).PRLTAO0031-900710.1103/PhysRevLett.126.241101], and it extends our investigation on the energy dependence of the spectral index of heavy elements. It reports the analysis of nickel data collected from November 2015 to May 2021 and a detailed assessment of the systematic uncertainties. In the region from 20 to 240  GeV/n our present data are compatible within the errors with a single power law with spectral index -2.51±0.07.
    Sprache Englisch
    Erscheinungsdatum 2022-04-15
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.131103
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with the Calorimetric Electron Telescope on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / Ebisawa, K / Ficklin, A W / Fuke, H /
    Gonzi, S / Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / de Nolfo, G A / Okuno, S / Ormes, J F / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K / Zober, W V

    Physical review letters

    2022  Band 129, Heft 10, Seite(n) 101102

    Abstract: A precise measurement of the cosmic-ray proton spectrum with the Calorimetric Electron Telescope (CALET) is presented in the energy interval from 50 GeV to 60 TeV, and the observation of a softening of the spectrum above 10 TeV is reported. The analysis ... ...

    Abstract A precise measurement of the cosmic-ray proton spectrum with the Calorimetric Electron Telescope (CALET) is presented in the energy interval from 50 GeV to 60 TeV, and the observation of a softening of the spectrum above 10 TeV is reported. The analysis is based on the data collected during ∼6.2  years of smooth operations aboard the International Space Station and covers a broader energy range with respect to the previous proton flux measurement by CALET, with an increase of the available statistics by a factor of ∼2.2. Above a few hundred GeV we confirm our previous observation of a progressive spectral hardening with a higher significance (more than 20 sigma). In the multi-TeV region we observe a second spectral feature with a softening around 10 TeV and a spectral index change from -2.6 to -2.9 consistently, within the errors, with the shape of the spectrum reported by DAMPE. We apply a simultaneous fit of the proton differential spectrum which well reproduces the gradual change of the spectral index encompassing the lower energy power-law regime and the two spectral features observed at higher energies.
    Sprache Englisch
    Erscheinungsdatum 2022-09-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.101102
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: Measurement of the Iron Spectrum in Cosmic Rays from 10  GeV/n to 2.0  TeV/n with the Calorimetric Electron Telescope on the International Space Station.

    Adriani, O / Akaike, Y / Asano, K / Asaoka, Y / Berti, E / Bigongiari, G / Binns, W R / Bongi, M / Brogi, P / Bruno, A / Buckley, J H / Cannady, N / Castellini, G / Checchia, C / Cherry, M L / Collazuol, G / Ebisawa, K / Fuke, H / Gonzi, S /
    Guzik, T G / Hams, T / Hibino, K / Ichimura, M / Ioka, K / Ishizaki, W / Israel, M H / Kasahara, K / Kataoka, J / Kataoka, R / Katayose, Y / Kato, C / Kawanaka, N / Kawakubo, Y / Kobayashi, K / Kohri, K / Krawczynski, H S / Krizmanic, J F / Link, J / Maestro, P / Marrocchesi, P S / Messineo, A M / Mitchell, J W / Miyake, S / Moiseev, A A / Mori, M / Mori, N / Motz, H M / Munakata, K / Nakahira, S / Nishimura, J / de Nolfo, G A / Okuno, S / Ormes, J F / Ospina, N / Ozawa, S / Pacini, L / Papini, P / Rauch, B F / Ricciarini, S B / Sakai, K / Sakamoto, T / Sasaki, M / Shimizu, Y / Shiomi, A / Spillantini, P / Stolzi, F / Sugita, S / Sulaj, A / Takita, M / Tamura, T / Terasawa, T / Torii, S / Tsunesada, Y / Uchihori, Y / Vannuccini, E / Wefel, J P / Yamaoka, K / Yanagita, S / Yoshida, A / Yoshida, K

    Physical review letters

    2021  Band 126, Heft 24, Seite(n) 241101

    Abstract: The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray iron over a wide energy interval. In this Letter a measurement of the iron spectrum is presented in the range ... ...

    Abstract The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray iron over a wide energy interval. In this Letter a measurement of the iron spectrum is presented in the range of kinetic energy per nucleon from 10  GeV/n to 2.0  TeV/n allowing the inclusion of iron in the list of elements studied with unprecedented precision by space-borne instruments. The measurement is based on observations carried out from January 2016 to May 2020. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number Z=40). The energy is measured by a homogeneous calorimeter with a total equivalent thickness of 1.2 proton interaction lengths preceded by a thin (3 radiation lengths) imaging section providing tracking and energy sampling. The analysis of the data and the detailed assessment of systematic uncertainties are described and results are compared with the findings of previous experiments. The observed differential spectrum is consistent within the errors with previous experiments. In the region from 50  GeV/n to 2  TeV/n our present data are compatible with a single power law with spectral index -2.60±0.03.
    Sprache Englisch
    Erscheinungsdatum 2021-07-02
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.126.241101
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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