Abstracts Book - IMRC 2018

• SE3-O006
MeV PROTON IRRADIATION DAMAGE ON
TUNGSTEN: BLISTER FORMATION
Guy Makov 1
1 Ben-Gurion University of the Negev, Materials Engineering, Israel.
The material response of tungsten to irradiation by MeV protons has been
studied experimentally, in particular with respect to bubble and blister
formation. Tungsten samples were irradiated by 2.2 MeV protons at the Soreq
Applied Research Accelerator Facility (SARAF) to doses of the order of 10 17
protons/cm 2 which are below the reported critical threshold for blister
formation derived keV range irradiation studies. Large, well-developed blisters
are observed indicating that for MeV range protons the critical threshold is at
least an order of magnitude lower than the lowest value reported previously.
The effects of fluence, flux, and corresponding temperature on the critical dose
for blister formation and the characteristics of the blisters were studied in both
poly- and single crystal samples. Focused Ion Beam (FIB) cross sections of
several blisters exposed their depth and structure.
Keywords: Tungsten, Proton irradiation, Blisters
Presenting authors email: makovg@bgu.ac.il