Biographical Memoirs Volume 69 (1996) / Chapter Skim
Currently Skimming:
EDWIN MATTISON MCMILLAN
EDWIN MATTISON MCMILLAN
Pages 214-241
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 215... ...
H PANOFSKY WITH THE DEATH OF Edwin Mattison McMilIan on September 8, 1991, the woric!
|
From page 216... ...
McMillan is survived by his wife and their three children (Ann Bradford Chaikin, David Mattison McMilIan, and Stephen Walker McMillan)
|
From page 217... ...
his first two years to activities somewhat separate from the mainstream activities of Lawrence's new Racliation Laboratory. He intenclec!
|
From page 218... ...
publisher! papers on the nuclear magnetic moment of ten talum6 as well as on the hyperfine structure of the solar spectrum.7 But McMilIan became progressively more involves!
|
From page 219... ...
from the quantum mechanical penetration of the Coulomb barrier, first user! to explain alpha radioactivity lifetimes by George Gamow.
|
From page 220... ...
At Berkeley McMilIan first performer! a simple experiment to measure the ranges of the energetic fission fragments by exposing a thin layer of uranium oxide on paper sandwiched between several thin aluminum foils on either side to the neutrons from S-MeV deuterons striking a beryllium target in the 37-inch cyclotron.
|
From page 221... ...
thin ammonium uranate layers clepositec! on a bakelite substrate en c!
|
From page 222... ...
The other, a fission product experiment with extremely thin colloclion catcher foils, shower! that the range of the 2.3-clay "fragments" was less than 0.!
|
From page 223... ...
In November 1940 McMillan left Berkeley for military work at MIT. Glenn T
|
From page 224... ...
with Seaborg the Nobel Prize in chemistry in 1951. MILITARY WORK DURING WORLD WAR II McMilIan's first assignment at MIT in November 1940 was work on airborne microwave racier at the newly established MIT Radiation Laboratory.
|
From page 225... ...
That large magnet gap was needed because the conventional cyclotron requires! flee voltages in excess of ~ million volts to reach energies close to 100 MeV.
|
From page 226... ...
heavy particle linear accelerators. For circular accelerators using magnetic fields uniform in azimuth, the phase stability region is during the decreasing part of the racliofrequency amplitucle.
|
From page 227... ...
before in sciencethe nearly simultaneous appearance of an iclea in several parts of the worIcI, when the clevelopment of the science concernec! has reacher!
|
From page 228... ...
to an annular chamber and accelerated in the traditional beta tron manner to about 2 MeV. Subsequent phase-stable gain in energy was produced by the electric field of an electromagnetic cavity as the guicling magnetic field!
|
From page 229... ...
for proper focusing en c! for control of ecicly current effects, special power supplies involving high-current switching hac!
|
From page 230... ...
as director of the Lawrence Racliation Laboratory and, after separation of the Berkeley and Livermore components in ~ 970, the Lawrence Berkeley Laboratory (LBL)
|
From page 231... ...
His tendency was to let the heacis of the scientific divisions have free rein, but he clic! not hesitate to arbitrate conflicting views ant!
|
From page 232... ...
within the scientific community, was lost on the average person. The proximity of the Berkeley part of the Racliation Laboratory to the Berkeley campus macle it an easy target for abuse.
|
From page 233... ...
The subsequent profounc! changes in the Lawrence Berkeley Laboratory, with particle physics playing an ever-clecreasing role, occurred under subsequent directors.
|
From page 234... ...
In committees McMilIan tenclec! to be relatively taciturn, but when he spoke up his remarks were decisive en c!
|
From page 235... ...
Yet while the very discovery of plutonium en c! his subsequent work at Los Alamos were major contributions to the nuclear weapons program, his own views on nuclear weapons became increasingly critical after the war.
|
From page 236... ...
Here the stable phase angle exists at the rising part of the rf amplitude; a particle whose energy and therefore velocity are below the norm arrives late and therefore experiences a larger radiofrequency amplitude, with the converse being true for a particle whose energy and velocity are above the norm.
|
From page 237... ...
McMillan was nominally director of the whole laboratory. When the Lawrence Berkeley Laboratory and the Lawrence Livermore Laboratory came into separate existences in 1970, Livermore was more than twice as large, with a budget more than three times that of Berkeley.
|
From page 238... ...
46:437-38. Some gamma-rays accompanying artificial nuclear disintegrations.
|
From page 239... ...
79:498-501. The relation between phase stability and first-order focusing in linear accelerators.
|
From page 240... ...
240 BIOGRAPHICAL MEMOIRS 1980 With R
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.