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astronomy

John Madey

John Madey is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand John Madey rather than just read about it. In short: John M. J.

John Madey — main illustration
John Madey — illustration

Key takeaways

  • John Madey belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect John Madey to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of John Madey from memory before moving on to harder problems.

Reference excerpt

John M. J. Madey (28 February 1943 - 5 July 2016) was a professor of physics at the University of Hawaiʻi at Mānoa, a former director of the Free Electron Laser Laboratory at Duke University, and formerly a professor (research) at Stanford University. He is best known for his development of the free-electron laser (FEL) at Stanford University in the 1970s. Raised in Clark, New Jersey, Madey and his older brother Jules took an early interest in ham radio. In 1956, when John was 13 and Jules was 16, they began relaying communications from the south pole to families and friends in the United States. While an undergraduate at the California Institute of Technology, he had a discussion where the question came up as to whether or not it was possible to enhance the transition rate for bremsstrahlung through stimulated emission. Madey received a BS degree in physics and a MS degree in Quantum Electronics from the California Institute of Technology in 1964 and 1965. He continued thinking about the stimulated emission question while working on his doctoral degree at Stanford, when he invented the free-electron laser. He was awarded a PhD in 1970, and appointed as Professor (Research) of Electrical Engineering in 1986.

Stanford University refused to patent this idea so Madey filed for a patent on his own. In the following years, he developed an innovative laser research program which was highly regarded in the scientific community. An opportunity arose for Madey to leave Stanford, taking a tenured position at the Physics Department of Duke University, which Madey accepted in 1988, moving his FEL research laboratory with him in 1989. This laboratory contained substantial equipment which required Duke to build an addition to its physics building to house the lab. In addition, while at Stanford, Madey had obtained sole ownership of two patents practiced by some of the equipment in the FEL lab.

Patent litigation At Duke, Madey served for almost a decade as director of the FEL lab. During that time the lab continued to achieve success both in securing research funding and in generating scientific breakthroughs. A dispute arose, however, between Madey and Duke. Duke contends that, despite his scientific prowess, Madey had ineffectively managed the lab, resulting in a negative external review of the science and management in his lab. Madey contends that Duke sought to use the lab's equipment for research areas outside the allocated scope of certain government funding, and that when he objected, Duke sought to remove him as lab director. Duke eventually removed Madey as director of the lab in 1997. The removal is not at issue in this appeal, however, it is the genesis of a unique patent infringement case. As a result of his removal from the directorship, Madey resigned from Duke in 1998. Duke, however, continued to operate some of the equipment in the lab. Madey then sued Duke for patent infringement of his two patents, and brought a variety of other claims. Initially, Madey suffered judicial setback, but later appeals courts found in his favor and made a historic judgment in his favor. In Madey v. Duke University, 307 F.3d 1351, 1362 (Fed. Cir. 2002)], the Federal Circuit Court of Appeals on October 3, 2002, effectively ended a 170-year-old practice of allowing scientists to freely borrow patented technologies for limited use in basic research that is not aimed at commercial use.

Awards Madey was awarded the Stuart Ballantine Medal from The Franklin Institute in 1989. Madey received the 2012 Robert R. Wilson Prize for Achievement in the Physics of Particle Accelerators, from the American Physical Society "For the invention and first experimental demonstration of the free electron laser and important contributions to its conceptual development." Madey was awarded the Willis E. Lamb Award for Laser Science and Quantum Optics in 2016.

References

Illustrations

John Madey illustration
John Madey: Madey's free-electron laser patent (US 5130994), filed June 25, 1991, issued July 14, 1992
Madey's free-electron laser patent (US 5130994), filed June 25, 1991, issued July 14, 1992

Worked examples

Example 1 — a first encounter with John Madey

Start with the simplest possible case. Write down what John Madey claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to John Madey before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about John Madey ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of John Madey

In research
John Madey appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses John Madey in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
John Madey is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1943 births, 2016 deaths, Accelerator physicists, so understanding it makes those chapters shorter.
In everyday life
Look for John Madey outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study John Madey in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what John Madey means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain John Madey out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is John Madey in simple terms?

John M. J.

Why does John Madey matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study John Madey?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on John Madey.

Tags

  • 1943 births
  • 2016 deaths
  • Accelerator physicists
  • American experimental physicists
  • Duke University faculty
  • Free-electron lasers
  • Laser researchers
  • Stanford University Department of Electrical Engineering faculty
  • University of Hawaiʻi at Mānoa faculty

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