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The positron source is an essential component of the International LinearCollider (ILC) and is an area that poses some design challenges. Oneconsideration is the material for the target, where the 1014 positrons persecond for the ILC are generated. The potential material would need to be ableto resist the high load created by the intense high energy photon beam. One ofsuch candidates is the titanium alloy Ti-6Al-4V, for which the results ofmaterial tests with 3.5 MeV electrons are shown. The material was characterizedafter the irradiation by high-energy X-ray diffraction (HE-XRD) and changescaused by the irradiation to the crystal structure were studied. These testsrevealed there was only minimal change in the phase fractions and crystalstructure of the material under conditions as expected for the ILC.

Target tests for the ILC positron source Talk presented at the International Workshop on Future Linear Colliders (LCWS2023)