Donald Arthur Glaser (September 21, 1926 – February 28, 2013) was an American physicist, neurobiologist, and the winner of the 1960 Nobel Prize in Physics for his invention of the bubble chamber used in subatomic particle physics.
Glaser attended Case School of Applied Science (now Case Western Reserve University), where he completed his Bachelor’s degree in physics and mathematics in 1946. During the course of his education there, he became especially interested in particle physics. He played viola in the Cleveland Philharmonic while at Case, and taught mathematics classes at the college after graduation. He continued on to the California Institute of Technology (Caltech), where he pursued his Ph.D. in physics. His interest in particle physics led him to work with Nobel laureate Carl David Anderson, studying cosmic rays with cloud chambers. He preferred the accessibility of cosmic ray research over that of nuclear physics. While at Caltech he learned to design and build the equipment he needed for his experiments, and this skill would prove to be useful throughout his career. He also attended molecular genetics seminars led by Nobel laureate Max Delbrück; he would return to this field later. Glaser completed his doctoral thesis, The Momentum Distribution of Charged Cosmic Ray Particles Near Sea Level, after starting as an instructor at the University of Michigan in 1949. He received his Ph.D. from Caltech in 1950, and he was promoted to Professor at Michigan in 1957.
While teaching at Michigan, Glaser began to work on experiments that led to the creation of the bubble chamber.7 His experience with cloud chambers at Caltech had shown him that they were inadequate for studying elementary particles. In a cloud chamber, particles pass though gas and collide with metal plates that obscure the scientists’ view of the event. The cloud chamber also needs time to reset between recording events and cannot keep up with accelerators' rate of particle production.
He experimented with using superheated liquid in a glass chamber. Charged particles would leave a track of bubbles as they passed through the liquid, and their tracks could be photographed. He created the first bubble chamber with ether.[2]:37–38 He experimented with hydrogen while visiting the University of Chicago, showing that hydrogen would also work in the chamber.
It has often been claimed that Glaser was inspired to his invention by the bubbles in a glass of beer; however, in a 2006 talk, he refuted this story, saying that although beer was not the inspiration for the bubble chamber, he did experiments using beer to fill early prototypes.
His new invention was ideal for use with high-energy accelerators, so Glaser traveled to Brookhaven National Laboratory with some students to study elementary particles using the accelerator there. The images that he created with his bubble chamber brought recognition of the importance of his device, and he was able to get funding to continue experimenting with larger chambers. Glaser was then recruited by Nobel laureate Luis Alvarez, who was working on a hydrogen bubble chamber at the University of California at Berkeley. Glaser accepted an offer to become a Professor of Physics there in 1959.
Glaser was awarded the 1960 Nobel Prize for Physics for the invention of the bubble chamber. His invention allowed scientists to observe what happens to high-energy beams from an accelerator, thus paving the way for many important discoveries.
