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The acceleration of cosmic ray particles and their propagation in the MilkyWay and the heliosphere tangle with each other, leading to complexity anddegeneracy of the modeling of Galactic cosmic rays (GCRs). The recentmeasurements of the GCR spectra by Voyager-1 from outside of the heliospheregave a first direct observation of GCRs in the local interstellar (LIS)environment. Together with the high-precision data near the Earth taken by ACEand AMS-02, we derive the LIS spectra of Helium, Lithium, Beryllium, Boron,Carbon, and Oxygen nuclei from a few MeV/n to TeV/n, using anon-parameterization method. These LIS spectra are helpful in further studyingthe injection and propagation parameters of GCRs. The nearly 20 years of datarecorded by ACE are used to determine the solar modulation parameters over thesolar cycles 23 and 24, based on the force-field approximation. We find generalagreements of the modulation potential with the results inferred from neutronmonitors and other cosmic ray data.

Studies on cosmic ray nuclei with Voyager, ACE and AMS-02: I. local interstellar spectra and solar modulation