Measurement of separate electron and positron spectra from 10 to 20 GeV with the geomagnetic field on DAMPE

Alemanno, F.; An, Q.; Azzarello, P.; Barbato, F. C.T.; Bernardini, P.; Bi, X. J.; Boutin, H. V.; Cagnoli, I.; Cai, M. S.; Casilli, E.; Catanzani, E.; Chang, J.; Chen, D. Y.; Chen, J. L.; Chen, Z. F.; Chen, Z. X.; Coppin, P.; Cui, M. Y.; Cui, T. S.; Cui, Y. X.; De Mitri, I.; de Palma, F.; Di Giovanni, A.; Dong, T. K.; Dong, Z. X.; Donvito, G.; Duan, J. L.; Duan, K. K.; Fan, R. R.; Fan, Y. Z.; Fang, F.; Fang, K.; Feng, C. Q.; Feng, L.; Frieden, J. M.; Fusco, P.; Gao, M.; Gargano, F.; Ghose, E.; Gong, K.; Gong, Y. Z.; Guo, D. Y.; Guo, J. H.; Han, S. X.; Hu, Y. M.; Huang, G. S.; Huang, X. Y.; Huang, Y. Y.; Ionica, M.; Jiang, L. Y.; Jiang, Y. Z.; Jiang, W.; Kong, J.; Kotenko, A.; Kyratzis, D.; Lei, S. J.; Li, M. B.; Li, W. H.; Li, W. L.; Li, X.; Li, X. Q.; Liang, Y. M.; Liu, C. M.; Liu, H.; Liu, J.; Liu, S. B.; Liu, Y.; Loparco, F.; Luo, C. N.; Ma, M.; Ma, P. X.; Ma, T.; Ma, X. Y.; Marsella, G.; Mazziotta, M. N.; Mo, D.; Nie, Y.; Niu, X. Y.; Parenti, A.; Peng, W. X.; Peng, X. Y.; Perrina, C.; Putti-Garcia, E.; Qiao, R.; Rao, J. N.; Rong, Y.; Sarkar, R.; Savina, P.; Serpolla, A.; Shangguan, Z.; Shen, W. H.; Shen, Z. Q.; Shen, Z. T.; Silveri, L.; Song, J. X.; Su, H.; Su, M.; Sun, H. R.; Sun, Z. Y.; Surdo, A.; et al.

doi:10.1088/1674-1137/adfa04

research article

Measurement of separate electron and positron spectra from 10 to 20 GeV with the geomagnetic field on DAMPE

Alemanno, F.

•

An, Q.

•

Azzarello, P.

November 1, 2025

Chinese Physics C

The cosmic-ray (CR) electrons and positrons in space are of considerable significance for studying the origin and propagation of CRs. The satellite-borne detector Dark Matter Particle Explorer (DAMPE) has been used to measure the separate electron and positron spectra, as well as the positron fraction. In this study, the Earth's magnetic field is used to distinguish CR electrons and positrons, as the DAMPE detector does not carry an onboard magnet. The energy for the measurements ranges from 10 to 20 GeV, which is currently limited at high energy by the zenith-pointing orientation of DAMPE. The results are consistent with previous measurements based on the magnetic spectrometer by AMS-02 and PAMELA, whereas the results of Fermi-LAT appear to be systematically shifted to larger values.

Type

research article

DOI

10.1088/1674-1137/adfa04

Scopus ID

2-s2.0-105016556933

Author(s)

Alemanno, F.

Università del Salento

An, Q.

State Key Laboratory of Particle Detection & Electronics

Azzarello, P.

Université de Genève

Barbato, F. C.T.

Gran Sasso Science Institute

Bernardini, P.

Università del Salento

Bi, X. J.

Institute of High Energy Physics, Chinese Academy of Sciences

Boutin, H. V.

Université de Genève

Cagnoli, I.

Gran Sasso Science Institute

Cai, M. S.

Purple Mountain Observatory Chinese Academy of Sciences

Casilli, E.

Università del Salento

Date Issued

2025-11-01

Published in

Chinese Physics C

Volume

49

Issue

11

Article Number

115001

Subjects

DAMPE

•

east-west effect

•

electron and positron spectra

•

geomagnetic field

•

positron fraction

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units

LPHE-OS

Funder	Funding(s)	Grant Number	Grant URL
Program for Innovative Talents and Entrepreneur in Jiangsu
New Cornerstone Science Foundation
Chinese Academy of Sciences
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Available on Infoscience

October 3, 2025

Use this identifier to reference this record

https://infoscience.epfl.ch/handle/20.500.14299/254562