Alexander Valishev

Fermilab senior scientist Yuri I. Alexahin, 72, died of a sudden stroke on Sept. 8 at the Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, just miles from Fermilab, where for two decades he was a leading beam physicist. He was born on Jan. 27, 1948, in the Russian town of Vorkuta. After studying physics and graduating from Moscow State University, he worked from 1971-1988 at the Joint Institute for Nuclear Research in Dubna, Russia, and received his Ph.D. in…