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Table 2

Expected TOF values in nanoseconds from simulations (Sim) of the IBEX-Lo time of flight unit, which are validated by pre-launch calibrations with neutral beams of H, He, C, and O.

Sim ToF EMG MEQ
H

TOF0 29.474 30.043 29.525 29.331
TOF1 14.898 ~15.34 13.935 14.108
TOF2 14.576 15.337 14.467 14.339
mass = 2

TOF0 42.267 42.948 (...) 42.416
TOF1 21.473 ~22.20 (...) 21.656
TOF2 20.795 22.195 (...) 22.228
C

TOF0 112.015 (...) 119.196 119.145
TOF1 58.693 (...) 59.721 59.698
TOF2 53.322 (...) 60.298 60.276
O

TOF0 132.492 (...) 135.945 136.074
TOF1 70.135 (...) 67.513 67.574
TOF2 62.357 (...) 67.960 68.020

Notes. ToF are the expected TOF values from the analytical approach (TOF1 values are interpolated values from TOF2). EMG are the averages of the TOFs obtained from EMG peak fitting of data taken for different groupings of orbits (time intervals 1–5), energy bins (1, 2, and 3), and TOFs during the spring passage. MEQ are values found from the species peaks using the mass equations.

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