Measurement of cosmic-ray charge with the DAMPE Silicon-Tungsten Tracker

Vitillo, S.; Gallo, V.

doi:10.22323/1.301.0240

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…The main contribution (up to ∼15%, for energy larger than 100 TeV) comes from the hadronic interaction model used for the MC simulation. The GEANT4-FTFP_BERT model is found to be in better agreement with flight and test beam data [23,24,45], and is therefore chosen for the computation of the p+He spectrum. To quantify the uncertainty resulting from this choice, the p+He spectrum is computed also using the FLUKA DPMJET-3 model for helium and GEANT4-QGSP_BERT for protons.…”

mentioning

confidence: 99%

Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

Alemanno¹,

An²,

Azzarello³

et al. 2021

Phys. Rev. Lett.

111

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Recent observations of the light component of the cosmic-ray spectrum have revealed unexpected features that motivate further and more precise measurements up to the highest energies. The Dark Matter Particle Explorer (DAMPE) is a satellite-based cosmic-ray experiment that is operational since December 2015, continuously collecting data on high-energy cosmic particles with very good statistics, energy resolution, and particle identification capabilities. In this work, the latest measurements of the energy spectrum of proton+helium in the energy range from 46 GeV to 316 TeV are presented. Among the most distinctive features of the spectrum, a spectral hardening at ∼600 GeV has been observed, along with a softening at ∼29 TeV measured with a 6.6σ significance. Moreover, by measuring the energy spectrum up to 316 TeV, a strong link is established between space-and ground-based experiments, also suggesting the presence of a second hardening at ∼150 TeV. * https://geant4.web.cern.ch/node/302 † https://web.ikp.kit.edu/rulrich/crmc.html

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confidence: 99%

Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

Alemanno¹,

An²,

Azzarello³

et al. 2021

Phys. Rev. Lett.

111

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“…In-orbit Performance of the Silicon-Tungsten Tracker of the DAMPE Mission Xin Wu zero suppression thresholds when noise changes. The average noise is ~2.85 ADC, while the MIP signal for a particle hitting a readout(floating) strip is ~52(27) ADC (note the charge measurement of the STK is reported in another paper [4] in this proceedings). Another indicator of the excellent quality of the STK is the fraction of good channels (conservatively defined as noise < 5 ADC).…”

Section: Pos(icrc2017)926mentioning

confidence: 99%

In-orbit Performance of the Silicon-Tungsten Tracker of the DAMPE Mission

Wu¹

2018

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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The DArk Matter Particle Explorer (DAMPE) is a high energy astroparticle satellite mission designed to detect electron, photon and cosmic rays with high precision for Dark Matter search, cosmic ray flux and composition measurement and gamma-ray astronomy. One of the key components of the DAMPE payload is the Silicon-Tungsten Tracker (STK), consisting of 6 tracking planes, each plane is made of 2 orthogonal layers of single-sided silicon micro-strip detectors. Three layers of 1 mm thick tungsten plates are interleaved with the tracking planes to serve as photon converter. Besides precise track reconstruction for charge particles and converted photons, the STK will also measure the charge of the incoming cosmic ray, and provide pre-shower information to improve particle identification. After intensive design, prototyping, test and production efforts by the STK collaboration, the construction of the STK has been completed in April 2015 and successfully integrated into the DAMPE payload in June 2015, after passing the environmental acceptance test. The DAMPE satellite was launched on December 17 th 2015. After the launch the STK has been commissioned rapidly in orbit and has ben functioning extremely well since, which allows it to play a key role in the first physics results coming out of the DAMPE collaboration. In this contribution, a brief overview on the development, qualification and beam tests of the STK Engineering and Qualification Model and the Flight Model will be provided. Then the STK in-orbit calibration and performance will be presented in details, including the noise behavior, the thermal and mechanical stability, the alignment procedure, the position resolution, and the tracking efficiency.

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“…In order to reduce the proton contamination an additional cut on the first layer of STK is used. The charge measured in at least one of the first silicon layers (X or Y view) of STK has to be compatible with Helium charge, a description on the charge identification from STK can be found in [13]. This selection allows to have a good Helium identification before the interaction with the…”

Section: Pos(icrc2017)169mentioning

confidence: 99%

Studies on Helium flux with DAMPE

Gallo¹,

Bernardini²,

Ma³

et al. 2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Since December 2015 the DAMPE (DArk Matter Particle Experiment) detector is on-orbit at an altitude of 500 km and takes data smoothly. It consists of a Plastic Scintillator strip Detector (PSD), a Silicon-Tungsten tracKer-converter (STK), a BGO imaging calorimeter and a NeUtron Detector (NUD). The charge of incident cosmic rays (CRs) is measured by looking at the energy deposited in the PSD, and the tracks are reconstructed thanks to the high spatial resolution of the STK. The remarkable depth (32 radiation lengths) of the calorimeter allows for an estimate of the CR energy. Then the DAMPE features are suitable to distinguish the elemental composition of CRs and to measure their fluxes in the energy range of 20 GeV-100 TeV. Here the analysis progress in the study of the Helium component will be presented and discussed. * Speaker. † The DAMPE mission is funded by the strategic priority science and technology projects in space science of Chinese Academy of Sciences.

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Measurement of cosmic-ray charge with the DAMPE Silicon-Tungsten Tracker

Abstract: Measurement of cosmic-ray charge with the DAMPE Silicon-Tungsten Tracker S. Vitillo

Cited by 5 publications

References 5 publications

Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

In-orbit Performance of the Silicon-Tungsten Tracker of the DAMPE Mission

Studies on Helium flux with DAMPE

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