The average cluster size as a function of beam incident angle.
Data were obtained for ALPIDE sensor at Vbb=0V and at Vbb=-3V using a 6 GeV/c pi^{-} beam  at the Proton Synchrotron at CERN.

TID and NIEL are calculated from the proton flux ( Ekin = 30 MeV)
For 2.7 Mrad we had  a  total fluence of  F= 1.14763e+13   protons cm^{-2}

NIEL is calculated as    NIEL = D*F        where D is taken from  https://rd50.web.cern.ch/rd50/NIEL/default.html
There one can find that for 30 MeV proton   D/(95 MeV mb ) = 2.346
This gives the total accumulated NIEL = 2.69e13  1_MeV_neq/cm^{-2}   which we rounded to 2.7e13   1_MeV_neq/cm^{-2}

TID is calculated  from the formula   TID [krad] =   1.60 E-8 * LET [MeV*cm^2/mg] * F[cm^-2]
where LET for 30 MeV protons in silicon is  1.476E-02 MeV*cm^2/mg   (taken from SRIM)