(57) A time-of-flight (TOF) measurement system for measuring energy of a pulsed hadron
beam, wherein each pulse of the beam is structured into a series of bunches (B) of
charged particles, said bunches being repeated according to a repetition rate of the
order of magnitude of radiofrequency. The system comprises
a first detector (1), a second detector (2) and a third detector (3) arranged along
a beam path (10), each of the detectors being configured to detect the passage of
a bunch (B) of charged particles and provide an output signal (vPP,1, vPP,2, vPP,3) dependent on phase of the detected bunch (B), wherein the second detector (2) is
spaced apart from the first detector (1) by a first distance (L12) and wherein the third detector (3) is spaced apart from the second detector (2)
by a second distance (L23), wherein the first distance is set out in such a way as that time of flight (t12) of the bunch (B) from the first detector (1) to the second detector (2) is approximately
equal to, or lower than a repetition period (TRFQ) of the bunches (B), and wherein the second distance is set out in such a way as
that time of flight (T23) of the bunch (B) from the second detector (2) to the third detector (3) is greater
than a multiple of the repetition period (TRFQ) of the bunches (B), and
a processing unit (7) configured to
a) calculate phase shifts (Δϕ12, Δϕ13, Δϕ23) between the output signals (vPP,1, vPP,2, vPP,3) of the detectors (1, 2, 3), and
b) calculate energy (E) of the pulse based on the calculated phase shifts.
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