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RIS citation export for MOPOB13: Post Irradiation Examination Results of the NT-02 Graphite Fins Numi Target

AU - Ammigan, K.
AU - Asner, D.
AU - Casella, A.M.
AU - Edwards, D.J.
AU - Hurh, P.
AU - Schemer-Kohrn, A.L.
AU - Senor, D.J.
AU - Sidorov, V.I.
AU - Zwaska, R.M.
ED - Schaa, Volker RW
ED - Power, Maria
ED - Shiltsev, Vladimir
ED - White, Marion
TI - Post Irradiation Examination Results of the NT-02 Graphite Fins Numi Target
J2 - Proc. of NAPAC2016, Chicago, IL, USA, October 9-14, 2016
C1 - Chicago, IL, USA
T2 - North American Particle Accelerator Conference
T3 - 3
LA - english
AB - The NT-02 neutrino target in the NuMI beamline at Fermilab is a 95 cm long target made up of segmented graphite fins. It is the longest running NuMI target, which operated with a 120 GeV proton beam with maximum power of 340 kW, and saw an integrated total proton on target of 6.1 x 1020. Over the last half of its life, gradual degradation of neutrino yield was observed until the target was replaced. The probable causes for the target performance degradation are attributed to radiation damage, possibly including cracking caused by reduction in thermal shock resistance, as well as potential localized oxidation in the heated region of the target. Understanding the long-term structural response of target materials exposed to proton irradiation is critical as future proton accelerator sources are becoming increasingly more powerful. As a result, an autopsy of the target was carried out to facilitate post-irradiation examination of selected graphite fins. Advanced microstructural imaging and surface elemental analysis techniques were used to characterize the condition of the fins in an effort to identify degradation mechanisms, and the relevant findings are presented in this paper.
CP - Geneva, Switzerland
SP - 99
EP - 101
KW - ion
KW - target
KW - radiation
KW - proton
KW - operation
DA - 2017/01
PY - 2017
SN - 978-3-95450-180-9
DO - 10.18429/JACoW-NAPAC2016-MOPOB13
UR - https://jacow.org/napac2016/papers/mopob13.pdf
ER -