  The three-body dissociation dynamics of the dicationic camphor molecule
(C$_{10}$H$_{16}$O$^{2+}$) resulting from Auger decay are investigated using
soft X-ray synchrotron radiation. A photoelectron-photoion-photoion coincidence
(PEPIPICO) method, a combination of a velocity map imaging (VMI) spectrometer
and a time-of-flight (ToF) spectrometer is employed to measure the 3D momenta
of ions detected in coincidence. The ion mass spectra and the ion-ion
coincidence map at photon energies of 287.9 eV (below the C 1s ionization
potential) and 292.4 eV (above the C 1s ionization potential for skeletal
carbon) reveal that fragmentation depends on the final dicationic state rather
than the initial excitation. Using the native frame method, three new
fragmentation channels are discussed; (1) CH$_2$CO$^+$ + C$_7$H$_{11}^+$ +
CH$_3$, (2) CH$_3^+$ + C$_7$H$_{11}^+$ + CH$_2$CO, and (3) C$_2$H$_5^+$ +
C$_6$H$_9^+$ + CH$_2$CO. The dominating nature of sequential decay with
deferred charge separation is clearly evidenced in all three channels. The
results are discussed based on the experimental angular distributions and
momenta distributions, corroborated by geometry optimization of the ground,
monocationic, and dicationic camphor molecule.
