Coolidge

Liebhafsky, H.A. (1974) William David Coolidge A Centenarian and his Work (Wiley-Interscience, New York). 

The best orbitals for this simple system are those which exploit its symmetry. James and Coolidge (1935) found that a good approximation to the lOg orbital was... 

Congress, which had had an uneasy relationship with the living Ericsson, and unable to decide how to honor the inventor of the Monitor, acquiesced to a suggestion from the Swedish government that Ericsson s body be returned to Sweden. In 1926 Ericsson was finally honored with a statue unveiled in Washington, D.C. by President Calvin Coolidge and Gustaf Adolf, Crown Prince of Sweden. 

Taking up the idea of "correlated wave functions containing r12, James and Coolidge (1933) made a careful study of the H2 problem and, after a great deal of numerical work, they obtained finally an energy value in complete agreement with experience. This was another successful test of the validity of the Schrodinger... 

We note that the power series expansion III. 119is a direct generalization of the Hylleraas form III. 114 to which it should go over in the limiting case Rab = 0. James and Coolidge obtained a value of the electronic energy, —1.17347 at.u., in excellent agreement with the experimental results available, and their work forms even today the best basis for our understanding of the electronic structure of the chemical bond. 

Evett, A. A., /. Chem. Phys. 24, 150, Ground state of (HeH)+." Method of James and Coolidge 20-term function. 

Fig. 1-2. Schematic diagram of the Coolidge (high-vacuum) x-ray tube. Coolidge tubes are widely used because they are stable and long-lived and permit tube current and voltage to be controlled independently.

The spectrum from a Coolidge tube often contains lines traceable to impurities, those of copper, nickel, and iron being the most common. The impurities may be present in the target of the new tube, but they are more likely to be deposited on the target during operation. It is consequently desirable that the analytical chemist maintain current acquaintance with the spectrum of his x-ray source. 

In most ordinary cases, the disadvantages of x-ray excitation are more than compensated by the absence of the disadvantages peculiar to electron excitation, by the great convenience of Coolidge tubes (1.3), and by the absence of the large background count to which the continuous x-ray spectrum excited by electrons gives rise (1.5). 

The design and development of the Autrometer, as sketched by Behr,6 give us an excellent opportunity to indicate by reference a, number of items that were considered by its designers. (1) The need for better Coolidge tubes (9.4). The FA-100 series of x-ray tubes designed for the Autrometer has a peak of 100 kv, and a top rating of 3.5 kw with full-wave rectification, or 2.5 kw at constant potential,... 

---