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THE ROCHESTER<br />

ALUMNI-ALUMNAE REVIEW<br />

ALUM I REVIEW-VOL. XXI NO.2 ALUMNAE NEWS-VOL. XVII NO.2<br />

DECEMBER 1942-JANUARY 1943<br />

<strong>University</strong> and Eight <strong>Rochester</strong> Firms<br />

To Join in Million-Volt X-Ray Project<br />

Another major project involving close co-operation<br />

between the <strong>University</strong> and local industries will be<br />

launched early in 1943 when a giant million-volt x-ray<br />

unit, installed in a special laboratory in Crittenden<br />

Boulevard. is put in use. The new unit, one <strong>of</strong> the most<br />

powerful in the world, will make possible the internal<br />

inspection <strong>of</strong> heavy steel castings, reducing from hours<br />

to minutes x-ray examinations <strong>of</strong> metal shapes weighing<br />

three tons or more and with thicknesses up to five inches.<br />

Eight industrial plants, and one anonymous individual,<br />

provided the funds for the purchase <strong>of</strong> the equipment<br />

and for the erection <strong>of</strong> the laboratory building now being<br />

completed next to the River Campus heating plant.<br />

Alumni will recall that the <strong>University</strong>'s atom-smashing<br />

cyclotron, erected in the John J. Bausch-Henry Lomb<br />

Laboratory seven years ago under the direction <strong>of</strong> Physics<br />

Pr<strong>of</strong>essor Lee A. DuBridge, was likewise built on a cooperative<br />

plan, with various parts <strong>of</strong> the apparatus being<br />

contributed by industries interested in various phases <strong>of</strong><br />

atomic research.<br />

President Alan Valentine, in announcing the new<br />

project, pronounced it one <strong>of</strong> the most striking instances<br />

<strong>of</strong> <strong>University</strong>-industry collaboration seen here or elsewhere.<br />

Over a year <strong>of</strong> planning preceded its inauguration.<br />

The speed with which local industries will be able to<br />

complete the inspection and testing <strong>of</strong> war materials is<br />

only one advantage that the new x-ray laboratory <strong>of</strong>fers.<br />

They will also be able to accept for the first time certain<br />

war contracts which stipulate x-ray tests. X-ray inspection<br />

has been an established industrial practice for many<br />

years, but until recently the most powerful tubes operated<br />

at 400,000 volts. With tubes <strong>of</strong> this potential it<br />

required three and one-half hours to examine a piece <strong>of</strong><br />

steel five inches in thickness; the million-volt apparatus<br />

here will cut this time <strong>of</strong> exposure to five minutes.<br />

Similarly powerful equipment is already in use at<br />

various navy yards, at the Ford Motor Company plant,<br />

DECEMBER 1942-JANUARY 1943<br />

and elsewhere. Important savings in metal and labor,<br />

as well as in time, will be realized when the local equipment<br />

is put to use. Large castings can be examined<br />

quickly, and possible flaws discovered before the heavy<br />

masses <strong>of</strong> steel are machined. The exact location <strong>of</strong> these<br />

flaws may make possible the repair <strong>of</strong> a casting by the<br />

use <strong>of</strong> welding procedures. Further, the x-ray films can<br />

be used to point the way for the correction <strong>of</strong> faulty<br />

foundry techniques; porosity, shrinkage, blowholes, and<br />

sand inclusions will be revealed, and proper steps taken<br />

to eliminate these defects.<br />

The sponsoring firms include the Consolidated Machine<br />

Tool Corporation; Delco and <strong>Rochester</strong> Products Divisions<br />

<strong>of</strong> General Motors; Eastman Kodak Company;<br />

the Pfaudler Company; <strong>Rochester</strong> Gas and Electric Corporation;<br />

the <strong>Rochester</strong> Brewing Company, and the<br />

Symington-Gould Company.<br />

The General Electric X-ray Corporation, <strong>of</strong> Chicago,<br />

is designing and manufacturing the x-ray tube, and will<br />

advise on the housing, installation, and maintenance <strong>of</strong><br />

the equipment. The <strong>University</strong> will act as co-ordinator<br />

<strong>of</strong> the project, will supply the technicians and scientists<br />

who will man the laboratory on day and night shifts,<br />

and will make tests as requested by the industrial patrons.<br />

Prior to the opening <strong>of</strong> the laboratory here the staff will<br />

spend several weeks at the General Electric Laboratories.<br />

The project will be under the direction <strong>of</strong> Dr. Stafford L.<br />

Warren, chairman <strong>of</strong> the department <strong>of</strong> radiology <strong>of</strong> the<br />

School <strong>of</strong> Medicine and Dentistry.<br />

The tube used in the million-volt unit is only thirty<br />

inches long and three and one-half inches in diameter.<br />

It is <strong>of</strong> the multi-section type, gas-insulated, with twelve<br />

sections. Electrons to produce the rays emanate from a<br />

heated filament at the top. As the electrons pass through<br />

each section, a voltage <strong>of</strong> about 84,000 is applied, giving<br />

them an added push, so that by the time they reach the<br />

other end <strong>of</strong> the tube they have been "boosted" by a<br />

5

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