Exploring radiation hardness of PEPITES, a new transparent charged particle beam profiler

S. Elidrissi-Moubtassim (1) , Charbel Koumeir (1, 2) , N. Audouin (1) , G. Blain (2) , B. Boyer (3) , E. Delagnes (4) , F. Gebreyohannes (4) , Y. Geerebaert (3) , O. Gevin (4) , F. Haddad (1) , F. Magniette (3) , P. Manigot (3) , N. Michel (1, 2) , F. Poirier (1) , N. Servagent (2) , T. Sounalet (2) , O. Thiam (1) , C. Thiebaux (3) , M. Verderi (3)

1 Cyclotron ARRONAX
2 SUBATECH - Laboratoire de physique subatomique et des technologies associées
3 LLR - Laboratoire Leprince-Ringuet
4 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

PEPITES is a new type of transparent beam profiler (<10 µm water-equivalent thickness (WET)) under development that will equip the beam line of the ARRONAX cyclotron. Segmented electrodes consisting of nanometric thick gold strips deposited on a thin polymer membrane make the active part. In order to characterize the damages induced in the polymer, UV–Vis spectroscopy and scanning electron microscope have been used on 8 μm thick Kapton polyimide membranes irradiated with 68 MeV proton beams up to 7 × 10 15  H + /cm 2 . Dynamic and permanent damage was observed only at a high fluence level, thus ensuring long-term operation of the PEPITES detector in its nominal working environment.

Mots clés: Kapton; Damage; Protontherapy; Beam profiler

Domaines: Physique [physics]

S. Elidrissi-Moubtassim, Charbel Koumeir, N. Audouin, G. Blain, B. Boyer, et al.. Exploring radiation hardness of PEPITES, a new transparent charged particle beam profiler. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2020, 466, pp.8-11. ⟨10.1016/j.nimb.2020.01.003⟩. ⟨hal-02467213⟩