Facts: - residence: brazil , germany - fields: physics emission -rrb- -lrb- x-ray physics , gas discharges and electron - death date: 15 february 1944 - birth date: 04 april 1871 - name: arthur wehnelt - nationality: german - death place: berlin - birth place: rio de janeiro - alma mater: friedrich-wilhelms university Based on these bullet points, write a short biography describing the life of arthur wehnelt .
Answer:
arthur rudolph berthold wehnelt -lrb- april 4 , 1871 in rio de janeiro -- february 15 , 1944 in berlin -rrb- was a german physicist , noted for important contributions in the fields of x-ray physics , gas discharges and electron emission .