Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Attention ESVA Patrons:

The Emilio Segrè Visual Archives’ site is moving soon and adopting an open access approach to digital image sharing. Once we have transitioned to the new site in 2021, we will no longer charge for our high-resolution digital images or usage fees (note that we do not hold copyright to all the images in our collections and you will still need to obtain permission for those which we do not own).

If you are working on a long-term project, we advise you to wait until the migration is complete so that you may obtain our copies for free. If you cannot wait, email us at nbl [at] aip.org and we will do what we can to assist you. We will not be offering refunds for past purchases.

For more information, please visit our FAQ page on the Ex Libris Universum blog. 

Bromley David Allan F4

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Bromley David Allan F4

David Allan Bromley
Image title: 
Cockroft-Walton Accellerator
Credit line: 
AIP Emilio Segrè Visual Archives, Bromley Collection

Caption courtesy D. Allan Bromley: "The 600 kV Cockroft-Walton accelerator in the Sussex Street laboratories of the National Research Council of Canada in Ottawa, Ontario, Canada on which I and Jack Sample, who subsequently was Professor of Physics at the University of Alberta, attempted to study some of the proton capture steps in the Bethe proposal for stellar energy generation. The entire experimental arrangement was mounted in the small rectangular cage at the bottom of the large cylindrical column supporting the main electrostatic terminal."

Original format: 
1 photographic print (black and white; 7.5 x 9.5 inches)
Bromley, D. Allan (David Allan), 1926-2005
Sample, John Thomas