Robert McGreevy, director of ISIS, says, "It is with great sadness that I learnt our friend Jack Carpenter has passed away. Jack was quite justifiably known as the 'father' of spallation neutron sources – ISIS would probably not exist without his early pioneering work at Argonne National Laboratory. The breadth of his knowledge, but also his undiminished enthusiasm, was unsurpassed. He will be greatly missed."
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