Correction method for the readout saturation of the DAMPE calorimeter

Yue, Chuan; Ma, Peng-Xiong; Wu, Libo; Alemanno, Francesco; Bernardini, P.; Kyratzis, Dimitrios; Yuan, Guan-Wen; Yuan, Qiang; Zhang, Yun-Long

doi:10.1016/j.nima.2020.164645

Cited by 16 publications

(13 citation statements)

References 33 publications

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“…Furthermore, two corrections have been applied to the energy measurements. The first one consists in a method based on the study of MC simulations and developed in order to correct events for which the saturation of one or more BGO bars occurs [17]. The second correction takes into account the Birk's quenching effect that could occur inside the calorimeter [18] and it is based on the study of dedicated MC simulations in which we reproduced this effect.…”

Section: Pos(icrc2021)114mentioning

confidence: 99%

Cosmic Ray Helium spectrum measured by the DAMPE experiment

Ma¹,

Surdo²,

Yue³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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DAMPE (DArk Matter Particle Explorer) is a Space mission project promoted by the Chinese Academy of Sciences (CAS), in collaboration with Universities and Institutes from China, Italy and Switzerland. The satellite hosting the DAMPE detector has been successfully launched on December 17th, 2015, and is currently smoothly operating and collecting data. The main goals of the mission are: indirect search of Dark Matter, looking for signatures in the electron and photon spectra with energies up to 10 TeV; high energy gamma-ray astronomy; analysis of the flux and composition of primary Cosmic Rays (CR) in the energy range from a few tens of GeV up to hundreds of TeV. In this work we present the latest result on the CR Helium spectrum measured by DAMPE and discuss the observed features in the light of the current models about the origin, acceleration and propagation of galactic Cosmic Rays. The outcome is validated through independent analyses performed within the DAMPE Collaboration, which give consistent results within the analysis uncertainties.

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Section: Pos(icrc2021)114mentioning

confidence: 99%

Cosmic Ray Helium spectrum measured by the DAMPE experiment

Ma¹,

Surdo²,

Yue³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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“…An analytical method of computing the energy missing due saturation for DAMPE was published previously [31]. The method reconstructs the energy missing in a bar using the energies deposited in surrounding bars.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Machine learning-based method of calorimeter saturation correction for helium flux analysis with DAMPE experiment

Stolpovskiy,

Wu,

Tykhonov

et al. 2022

Preprint

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A: DAMPE is a space-borne experiment for the measurement of the cosmic-ray fluxes at energies up to around 100 TeV per nucleon. At energies above several tens of TeV, the electronics of DAMPE calorimeter would saturate, leaving certain bars with no energy recorded. In the present work we discuss the application of machine learning techniques for the treatment of DAMPE data, to compensate the calorimeter energy lost by saturation.

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“…A correction method based on MC simulations was developed based on the shower transverse and longitudinal developments [31], which was applied for the energy correction of those saturated events. When the energies of secondary particles in the shower are low enough, large amounts of ionization energy are deposited in the scintillator within very short traveling distances, resulting a nonlinearity between the scintillation photons and the ionization energy, known as the quenching effect [32]. The quenching effect would result in an under-estimate of the true energy of a shower.…”

Section: Energy Correctionsmentioning

confidence: 99%

“…We also performed two corrections of the energy measurement, as described below. A large energy deposit (approximately above 4 TeV) in a single BGO bar might result in a saturation even of the low-gain readout channel [13,32]. In most cases, the saturation occurred only for a single BGO bar per event.…”

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confidence: 99%

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Measurement of the cosmic ray helium energy spectrum from 70 GeV to 80 TeV with the DAMPE space mission

Alemanno,

An,

Azzarello

et al. 2021

Preprint

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The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the DArk Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of 4.3σ. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.

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Correction method for the readout saturation of the DAMPE calorimeter

Cited by 16 publications

References 33 publications

Cosmic Ray Helium spectrum measured by the DAMPE experiment

Cosmic Ray Helium spectrum measured by the DAMPE experiment

Machine learning-based method of calorimeter saturation correction for helium flux analysis with DAMPE experiment

Measurement of the cosmic ray helium energy spectrum from 70 GeV to 80 TeV with the DAMPE space mission

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