import numpy as np
[docs]
def tof_2_mc(t, t0, V, xDet, yDet, flightPathLength):
"""
Calculate the m/c for
Args:
t (float): Time in ns.
t0 (float): T0 correction in ns.
V (float): Voltage.
xDet (float): X-coordinate of the detector in cm.
yDet (float): Y-coordinate of the detector in cm.
flightPathLength (float): Flight path length in mm.
Returns:
float: Calculated m/c value.
"""
t = t - t0 # t0 correction
t = t * 1E-9 # is tof in ns
xDet = xDet * 1E-2 # xDet is in cm
yDet = yDet * 1E-2 # yDet is in cm
flightPathLength = flightPathLength * 1E-3 # flightPathLength is in mm
e = 1.6E-19 # coulombs per electron
amu = 1.66E-27 # conversion kg to Dalton
flightPathLength = np.sqrt(xDet ** 2 + yDet ** 2 + flightPathLength ** 2)
mc = 2 * e * V * (t / flightPathLength) ** 2
mc = mc / amu # conversion from kg/C to Da 6.022E23 g/mol, 1.6E-19C/ec
return mc