Story perspectives

Cosmic-Ray Anisotropy and Spectral Hardening Point to Geminga

5/9/2026

Summary

Cosmic Rays Anisotropy

ARGO-YBJ, IceCube, HAWC, KASCADE-Grande and Super-Kamiokande reported anisotropy of TeV–PeV cosmic rays in both hemispheres.
Alpha Magnetic Spectrometer data (Niu & Liu 2022; Aguilar et al. 2018, 2024) revealed hardening of nuclei spectra at several hundred GV and lithium, beryllium, boron and deuteron properties.
Zhao et al. (2022) linked the Geminga supernova remnant to local cosmic-ray production, with Sun et al. (2024) reporting evidence of cosmic-ray interactions near acceleration sites.

Summary

DAMPE Team Innovates

A. Serpolla, a DAMPE researcher, introduced a machine-learning correction for the calorimeter saturation, extending ion measurements toward the PeV scale (2026).
A. Tykhonov, a DAMPE scientist, developed a deep-learning algorithm to reconstruct cosmic-ray trajectories within the detector (2023).
P. -X. Ma, an instrumentation specialist, presented a method for aligning the plastic scintillator detector, improving spatial accuracy (2019).
G. Chen, an instrumentation analyst, quantified the BGO quenching effect on DAMPE’s nuclear spectral measurements (2023).

History

Historical Context

In 1995 Samuel Ting’s Antimatter Study Group proposed the Alpha Magnetic Spectrometer after the Superconducting Super Collider was cancelled. AMS-01 flew on Space Shuttle Discovery in June 1998, setting an anti-helium-to-helium limit of 1.1×10?6 and proving the detector concept. AMS-02, installed on the International Space Station in May 2011, has logged over 263 billion events by 2026, supplying the precision data that drives current TeV–PeV anisotropy studies.

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Cosmic Rays Anisotropy

ARGO-YBJ, IceCube, HAWC, KASCADE-Grande and Super-Kamiokande reported anisotropy of TeV–PeV cosmic rays in both hemispheres.
Alpha Magnetic Spectrometer data (Niu & Liu 2022; Aguilar et al. 2018, 2024) revealed hardening of nuclei spectra at several hundred GV and lithium, beryllium, boron and deuteron properties.
Zhao et al. (2022) linked the Geminga supernova remnant to local cosmic-ray production, with Sun et al. (2024) reporting evidence of cosmic-ray interactions near acceleration sites.

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