Showing posts with label University of Chicago. Show all posts
Showing posts with label University of Chicago. Show all posts

Wednesday, 20 July 2016

Enrico Fermi: Chicago Pile 1

Stagg Field reactor.jpg




What do you get when you combine 45,000 graphite blocks, 6 short tons of uranium metal and 50 short tons of uranium oxide?  A big reaction.  In 1942, Enrico Fermi supervised the first man made, self sustaining nuclear chain reaction,  describing the apparatus as "a crude pile of black bricks and wooden timbers."  Chicago Pile 1 was the world's first nuclear reactor.

No stranger to success in the scientific field, Fermi had won the 1938 Nobel Prize in Physics for the discovery of nuclear reactions caused by slow neutrons.  Fermi taught at the University of CHicago all the while contributing to the nuclear experiments, all part of the Manhattan Project which would produce the atomic bomb in 1945.

Enrico Fermi passed away in 1954, but other scientists, such as his manhattan Project colleague Robert Wilson, took up his cause.  It was Wilson who made sure that Fermilab took on the name of his late colleague.  Dedicated in 1974, Enrico's widow, Laura Fermi, who had fled Fascist Italy in 1939 with her husband, was present at the ceremony.  Comparing particle accelerators to Egypt's pyramids Laura Fermi explained:  "Both were tangible victories of men over the brute power of nature."

Note:  For more information visit Einstein's Letter to FDR sparks Manhattan Project at http://alinefromlinda.blogspot.ca/2015/09/einsteins-letter-to-fdr-sparks.html.


The Enrico Fermi stamp.


Enrico Fermi explains a model of the carbon atom circa 1948 on the 100th anniversary of Fermi's birth courtesy https://www.fnal.gov/pub/ferminews/ferminews01-02-02/p3.html.






Friday, 7 November 2014

Britain's Secret Weapon

Here are ten facts you may not know about radar.

1.  Radar was first developped in the 1930's in Bawdsey, England.

2.  Radar is similar to a bat using sound to see in the dark.

3.  Radar operators during World War II were able to spot objects up to 200 miles away.

4.  A semiconductor crystal was a key component of radar.  Certain universities worked to perfect this crystal including Purdue, Bell, MIT and University of Chicago.

5.  Radar was the secret weapon used by the British during the Battle of Britain.

6.  Radar operators were sworn to secrecy, not even revealing their work to their parents.  They often said they were doing "wireless" work.

7.  British Commandos raided a Nazi radar station in Belgium in 1942.  They dismantled the system and brought it back to Britain to study.

8.  During World War II, radar was able to detect the location of aircraft, vessels and even V-1 rockets.

9.  Over 4000 personnel were involved in radar operations in Britain.

10.  At its height, radar operators could see almost 2000 aircraft on their screens at one time.

Note:  For more information, read Gwen Arnold's book Radar Days (http://www.amazon.ca/Radar-Days-Memoirs-WAAF-Operator/dp/1873203497).





Canadian radar operators courtesy www.hmcssackville.ca.