GCR flux 9-day variations with LISA Pathfinder

11th International LISA Symposium

Grimani, C.^1,2 ; Benella, S.^1,2 ; Fabi, M.^1 ; Finetti, N.^2,3 ; Telloni, D.^2,4

DiSPeA, University of Urbino, Urbino

61029, Italy^1

National Institute for Nuclear Physics (INFN), Section in Florence, Sesto Fiorentino

50019, Italy^2

Department of Physical and Chemical Sciences, University of l'Aquila, L'Aquila

67100, Italy^3

National Institute for Astrophysics, Astrophysical Observatory of Torino, Pino Torinese

10025, Italy^4

关键词: Counting rates;    Energy spectra;    Flux depression;    Galactic cosmic rays;    LISA Pathfinder;    Rotation period;    Solar energetic particles;    Third harmonic;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/840/1/012037/pdf
DOI  :  10.1088/1742-6596/840/1/012037

来源: IOP

【 摘 要 】

Galactic cosmic-ray (GCR) energy spectra in the heliosphere vary on the basis of the level of solar activity, the status of solar polarity and interplanetary transient magnetic structures of solar origin. A high counting rate particle detector (PD) aboard LISA Pathfinder (LPF) allows for the measurement of galactic cosmic-ray and solar energetic particle (SEP) integral fluxes at energies > 70 MeV n-1up to 6500 counts s-1. Data are gathered with a sampling time of 15 s. A study of GCR flux depressions associated with the third harmonic of the Sun rotation period (∼ 9 days) is presented here.