Obsessed by a Dream : The Physicist Rolf Widerøe – a Giant in the History of Accelerators A Comfortable Home Formative years 1902 1943 The World Awaits The new life in Switzerland 1946 – 1996 The Dark Chapter Working in Germany during the war Treason Case number 3418 The papers in the National Archives But There Was More The papers in the British and American Intelligence Archives Why The unanswered question of why he went to Germany Postscript: The Letter from his Brother This Open Access biography chronicles the life and achievements of the Norwegian engineer and physicist Rolf Widerøe. Readers who meet him in the pages of this book will wonder why he isnt better known. The first of Widerøes many pioneering contributions in the field of accelerator physics was the betatron. He later went on to build the first radiation therapy machine an advance that would eventually revolutionize cancer treatment. Hospitals worldwide installed his machine and today’s modern radiation treatment equipment is based on his inventions. Widerøe’s story also includes a fair share of drama particularly during World War II when both Germans and the Allies vied for his collaboration. Widerøe held leading positions in multinational industry groups and was one of the consultants for building the worlds largest nuclear laboratory CERN in Switzerland. He gained over 200 patents received several honorary doctorates and a number of international awards. The author a professional writer and maker of TV documentaries has gained access to hitherto restricted archives in several countries which provided a wealth of new material and insights in particular in relation to the war years. She tells here a gripping and illuminating story