2011 Volume 21 Issue 3 Pages 152-155
This article is a part of record of a number of technical issues which we had encountered at during design and construction of the world best pulse neutron source at J-PARC. Among issues in the project, three critical decisions on the mercury target, AIC de-coupler adoption, and the para hydrogen coupled moderator, are highlighted from a view point of large impact on performances of the J-PARC pulse neutron source.