Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Lawrence Berkeley National Laboratory F10

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Lawrence Berkeley National Laboratory F10

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$20.00
Image title: 
This magnet, used to produce one and a quarter million volt protons, had a pole diameter of 11 inches, a gap separation of 1 1/2 inches and was made of Armco iron
Credit line: 
Lawrence Berkeley National Laboratory, courtesy of AIP Emilio Segrè Visual Archives
Description: 

This magnet, used to produce one and a quarter million volt protons, had a pole diameter of 11 inches, a gap separation of 1 1/2 inches and was made of Armco iron. Four thousand turns of number 14 double cotton-covered wire produced a field of 14,000 gauss. Since there was no cooling, the operation time was limited. The whole cost was about 800 dollars. Lawrence, characteristically, was busy finding what could be done with the money available, not how durable an apparatus he could build. That could come later.

Photo date: 
circa 1931-1935
Original format: 
2 photographic prints (black and white; 10 x 8 inches)
Person(s): 
Lawrence Berkeley National Laboratory