A series of beam tests were conducted at the KEK AR test beamline in ordet to
investigate the performance of a prototype detector for instrumentation in the
low-E beamline at the CERN H2 line. For the silicon strip detector, the
simultaneous readout of all strips of the X-Y detector was evaluated, in
addition to the detection efficiency being assessed through coincidences with
the trigger scintillators. The results demonstrated the successful acquisition
of data with full strip readout and the reconstruction of the two-dimensional
beam profile. Furthermore, we are contemplating the incorporation of GAGG
crystals, an inorganic scintillator characterized by a high light yield
($\sim$$5 \times 10^{4}$ photons/MeV) and a brief time constant ($\sim$60 ns),
within the newly developed time-of-flight detector. We assessed the resolution
of time-of-flight based on the data, with the objective of achieving the
required performance benchmarks through future improvements to the
time-of-tlight detector.

Cet article explore les excursions dans le temps et leurs implications.

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