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Characteristic scale lengths of nonthermal X-rays from the SN1006 NE rim,which are observed by Chandra, are interpreted in the context of the diffusiveshock acceleration on the assumption that the observed spatial profile ofnonthermal X-rays corresponds to that of accelerated electrons with energies ofa few tens of TeV. To explain the observed scale lengths, we construct twosimple models with a test particle approximation, where the maximum energy ofaccelerated electrons is determined by the age of SN1006 (age-limited model) orthe energy loss (energy loss-limited model), and constrain the magnetic fieldconfiguration and the diffusion coefficients of accelerated electrons. When themagnetic field is nearly parallel to the shock normal, the magnetic fieldshould be in the range of 20-85 micro Gauss and highly turbulent both inupstream and downstream, which means that the mean free path of acceleratedelectrons is on the order of their gyro-radius (Bohm limit). This situation canbe realized both in the age-limited and energy loss-limited model. On the otherhand, when the magnetic field is nearly perpendicular to the shock normal,which can exist only in the age-limited case, the magnetic field is severalmicro Gauss in the upstream and 14-20 micro Gauss in the downstream, and theupstream magnetic field is less turbulent than the downstream.Comment: 9 pages, 4 figures, accepted for publication in A&

Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN 1006 NE rim