Biography of Ernest Lawrence, Inventor of the Cyclotron

Biography of Ernest Lawrence, Inventor of the Cyclotron Ernest Lawrence (August 8, 1901–August 27, 1958) was an American physicist who invented the cyclotron, a device used to accelerate charged particles in a spiral pattern with the help of a magnetic field. The cyclotron and its successors have been integral to the field of high-energy physics. Lawrence received the 1939 Nobel Prize in Physics for this invention. Lawrence also played an essential role in the Manhattan Project, procuring much of the uranium isotope used in the atomic bomb launched on Hiroshima, Japan. In addition, he was notable for advocating government sponsorship of large research programs, or Big Science. Fast Facts: Ernest Lawrence Occupation: PhysicistKnown For: Winner of the 1939 Nobel Prize in Physics for the invention of the cyclotron; worked on the Manhattan ProjectBorn: August 8, 1901 in Canton, South DakotaDied: August 27, 1958 in Palo Alto, CaliforniaParents: Carl and Gunda LawrenceEducation: University of South Dakota (B.A.), University of Minnesota (M.A.), Yale University (Ph.D.)Spouse: Mary Kimberly (Molly) BlumerChildren: Eric, Robert, Barbara, Mary, Margaret, and Susan Early Life and Education Ernest Lawrence was the eldest son of Carl and Gunda Lawrence, who were both educators of Norwegian ancestry. He grew up around people who went on to become successful scientists: his younger brother John collaborated with him on the medical applications of the cyclotron, and his childhood best friend Merle Tuve was a pioneering physicist. Lawrence attended Canton High School, then studied for a year at Saint Olaf College in Minnesota before transferring to the University of South Dakota. There, he earned his bachelor’s degree in chemistry, graduating in 1922. Initially a premed student, Lawrence switched to physics with the encouragement of Lewis Akeley, a dean and a professor of physics and chemistry at the university. As an influential figure in Lawrence’s life, Dean Akeley’s picture would later hang on the wall of Lawrence’s office, a gallery that included notable scientists such as Niels Bohr and Ernest Rutherford. Lawrence earned his master’s degree in physics from the University of Minnesota in 1923, then a Ph.D. from Yale in 1925. He remained at Yale for three more years, first as a research fellow and later assistant professor, before becoming an associate professor at the University of California, Berkeley in 1928. In 1930, at the age of 29, Lawrence became a full professor at Berkeley- the youngest-ever faculty member to hold that title. Inventing the Cyclotron Lawrence came up with the idea of the cyclotron after poring over a diagram in a paper written by the Norwegian engineer Rolf Wideroe. Wideroes paper described a device that could produce high-energy particles by â€Å"pushing† them back and forth between two linear electrodes. However, accelerating particles to high enough energies for study would require linear electrodes that were too long to contain within a laboratory. Lawrence realized that a circular, rather than linear, accelerator could employ a similar method to accelerate charged particles in a spiral pattern. Lawrence developed the cyclotron with some of his first graduate students, including Niels Edlefsen and M. Stanley Livingston. Edlefsen helped develop the first proof-of-concept of the cyclotron: a 10-centimeter, circular device made of bronze, wax, and glass. Subsequent cyclotrons were larger and capable of accelerating particles to higher and higher energies. A cyclotron roughly 50 times bigger than the first was completed in 1946. It required a magnet that weighed 4,000 tons and a building that was about 160 feet in diameter and 100 feet tall. Manhattan Project During World War II, Lawrence worked on the Manhattan Project, helping to develop the atomic bomb. The atomic bomb required the â€Å"fissionable† isotope of uranium, uranium-235, and needed to be separated from the much more abundant isotope uranium-238. Lawrence proposed that the two could be separated because of their small mass difference, and developed working devices called â€Å"calutrons† that could separate the two isotopes electromagnetically. Lawrence’s calutrons were used to separate out uranium-235, which was then purified by other devices. Most of the uranium-235 in the atomic bomb that destroyed Hiroshima, Japan was obtained using Lawrence’s devices. Later Life and Death After World War II, Lawrence campaigned for Big Science: massive government spending on large scientific programs. He was part of the U.S. delegation at the 1958 Geneva Conference, which was an attempt to suspend the testing of atomic bombs. However, Lawrence became ill while at Geneva and returned to Berkeley, where he died one month later on August 27, 1958. After Lawrences death, the Lawrence Berkeley National Laboratory and the Lawrence Livermore National Laboratory were named in his honor. Legacy Lawrence’s largest contribution was the development of the cyclotron. With his cyclotron, Lawrence produced an element that did not occur in nature, technetium, as well as radioisotopes. Lawrence also explored the cyclotron’s applications in biomedical research; for example, the cyclotron could produce radioactive isotopes, which could be used to treat cancer or as tracers for studies in metabolism. The cyclotron design later inspired particle accelerators, such as the synchrotron, which have been used to make significant strides in particle physics. The Large Hadron Collider, which was used to discover the Higgs boson, is a synchrotron. Sources Alvarez, Luis W. Ernest Orlando Lawrence. (1970): 251-294.†American Institute of Physics.† Lawrence and the bomb.† n.d.Berdahl, Robert M. The Lawrence Legacy. 10 December 2001.Birge, Raymond T. Presentation of the Nobel Prize to professor Ernest O. Lawrence. Science (1940): 323-329.Hiltzik, Michael. Big Science: Ernest Lawrence and the Invention that Launched the Military-Industrial Complex. Simon Schuster, 2016.Keats, Jonathon. â€Å"The man who invented Big Science, Ernest Lawrence.† 16 July 2015.Rosenfeld, Carrie. â€Å"Ernest O. Lawrence (1901 - 1958).† n.d.Yarris, Lynn. â€Å"Lab mourns death of Molly Lawrence, widow of Ernest O. Lawrence.† January 8 2003.

Summary of William Shakespeares Play As You Like It

Summary of William Shakespeares Play As You Like It This As You Like It summary is designed to help you unpick this complex play from William Shakespeare.  We bring the story together in a fun and accessible way for readers new to As You Like It. As You Like It – Summary of the Plot Before the play has begun, Duke Senior has been banished (joined by some loyal attendants and Lords) to live in the forest by his usurping brother Duke Frederick. Duke Senior’s daughter Rosalind has remained in Court on her Cousin Celia’s request and is being brought up as if she is her sister. Orlando is the youngest son of Sir Rowland de Bois and is hated by his eldest brother Oliver. Orlando has challenged the court wrestler Charles to a fight and Oliver encourages it as he knows that Charles is strong and Oliver wants his brother harmed. The Big Fight The fight is announced and Rosalind and Celia decide to watch the match but are asked to try and discourage Orlando from fighting Charles. When Rosalind speaks with Orlando she finds him to be very courageous and quickly falls in love with him. Orlando fights Charles and wins (it is unclear whether he is brave and strong or if Charles let him win out of loyalty to the family). Rosalind speaks to Orlando after the fight commending his bravery. She discovers that he is the son of Sir Rowland who was loved by her father. Orlando has fallen in love with Rosalind. Orlando is encouraged to leave as Sir Rowland was an enemy to Duke Frederick. Off to the Forest Le Beau, a courtier, warns that Duke Frederick has taken a dislike to Rosalind believing that she is more beautiful than his own daughter and that she reminds people of what he did to her father. Duke Frederick banishes Rosalind and Celia vows to go with her into exile. The girls plan to leave for the forest to find Duke Senior. They take the clown Touchstone with them for safety. The girls decide to disguise themselves in order to avoid being found out and for extra security. Rosalind decides to dress as a man – Ganymede, Celia poses as his poor sister Aliena. Life in the forest with Duke Senior is presented as contented though not without danger or hardship. Duke Frederick believes that Rosalind and his daughter have run away to find Orlando and employs Orlando’s brother; Oliver, to find them and bring them back. He does not care if Orlando is dead or alive. Oliver, still hating his brother, happily agrees. Adam warns Orlando that he cannot go home because Oliver plans to burn it down and cause harm to Orlando. They decide to escape to the Forest of Ardenne. In the forest, Rosalind dressed as Ganymede and Celia as Aliena with Touchstone meet Corin and Silvius. Silvius is in love with Phoebe but his love is unrequited. Corin is fed up with serving Silvius and agrees to serve Ganymede and Aliena. Meanwhile Jaques and Amiens are in the forest happily passing the time with singing. Orlando and Adam are exhausted and starving and Orlando goes off to find food. He comes across Duke Senior and his men who are about to eat a great feast. He aggressively approaches them to get some food but they peacefully invite him and Adam to eat with them. Love Sickness Orlando is preoccupied with his love for Rosalind and hangs poems about her on trees. He carves poems into the bark. Rosalind finds the poems and is flattered, despite Touchstone’s mocking. It is revealed that Orlando is in the forest and is responsible for the poems. Rosalind, as Ganymede, meets with Orlando and offers to cure him of his love sickness. She encourages him to meet with her every day and woo her as if she were Rosalind. He agrees. Touchstone has fallen in love with a shepherdess called Audrey. Audrey is bawdy and the couple are a foil to Orlando and Rosalind in that their love is unromantic, lusty and honest. Touchstone almost marries Audrey in the forest but is persuaded to wait by Jaques. Rosalind is cross because Orlando is late. Phoebe is followed on stage by the doting Silvius who is desperate for her love. Phoebe scorns him and Rosalind/Ganymede criticises her for being so cruel. Phoebe instantly falls in love with Ganymede, who tried to put her off by scorning her further. Phoebe employs Silvius to run errands for her, asking him to send a letter to Ganymede chastising him for being so rude to her. Silvius agrees as he would do anything for her. Marriage Orlando arrives apologising for his lateness; Rosalind gives him a hard time but eventually forgives him. They have a mock marriage ceremony and he promises to return in a couple of hours after joining the Duke for a meal. Orlando is late again and while Rosalind is waiting for him, she is given Phoebe’s letter. She tells Silvius to pass Phoebe a message that if she loves Ganymede then s/he orders her to love Silvius. Oliver then arrives with a bloody handkerchief explaining that Orlando is late because he wrestled a lioness in order to protect his brother. Oliver apologises for his wrong-doing and recognises his brother’s bravery and has a change of heart. He then notices Celia as Aliena and promptly falls in love with her. A marriage ceremony is arranged between Oliver and Celia/Aliena and Touchstone and Audrey. Rosalind as Ganymede gathers together Orlando and Silvius and Phoebe in order to resolve the love triangle. Rosalind/Ganymede asks Orlando; if she can get Rosalind to attend the marriage ceremony will he marry her? Orlando agrees. Rosalind/Ganymede then tells Phoebe to attend the marriage ceremony ready to marry Ganymede but if she refuses she must agree to marry Silvius. Silvius agrees to marry Phoebe if she rejects Ganymede. The next day, Duke Senior and his men gather to witness the wedding between Audrey and Touchstone, Oliver and Aliena, Rosalind and Orlando and Ganymede or Silvius and Phoebe. Rosalind and Celia appear as themselves at the ceremony with Hymen the marriage god. Happy Endings Phoebe immediately rejects Ganymede realising that he was a woman and agrees to marry Silvius. Oliver happily marries Celia and Orlando marries Rosalind. Jaques De Bois brings news that Duke Frederick left the court to fight his brother in the forest but instead found a religious man who encouraged him to give up the court and live a life of religious contemplation. He hands the court back over to Duke Senior. Jaques goes to join him to learn more about religion and the group celebrates the news and the marriages by dancing and singing.