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Long path laser

Long path laser is a physics 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 Long path laser rather than just read about it. In short: The Long Path laser was an early high energy infrared laser at the Lawrence Livermore National Laboratory used to study inertial confinement fusion. Long path was completed in 1972 and was the first ICF laser ever to use neodymium doped glass as the lasing medium.

Key takeaways

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

Reference excerpt

The Long Path laser was an early high energy infrared laser at the Lawrence Livermore National Laboratory used to study inertial confinement fusion. Long path was completed in 1972 and was the first ICF laser ever to use neodymium doped glass as the lasing medium. It was capable of delivering about 50 joules of light at 1,062 nm onto a target in ~10 ns pulses. It did not use spatial filters to smooth the beam after amplification stages and thus had a fairly poor beam quality. Long path was mostly used to investigate laser energy absorption in deuterated plastic targets.

See also Laser Lawrence Livermore National Laboratory List of laser articles List of laser types

External links "Empowering Light--Historic Accomplishments in Laser Research: 50 Years of Science". Science & Technology Review. Lawrence Livermore National Laboratory. July 8, 2003. Archived from the original on 2004-11-09.

Worked examples

Example 1 — a first encounter with Long path laser

Start with the simplest possible case. Write down what Long path laser claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 Long path laser 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 Long path laser 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 Long path laser

In research
Long path laser appears in physics 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 Long path laser 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
Long path laser is common in secondary-school and first-year university syllabi. It links to neighbouring topics Inertial confinement fusion research lasers, Lawrence Livermore National Laboratory, Plasma physics stubs, so understanding it makes those chapters shorter.
In everyday life
Look for Long path laser 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 Long path laser in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Long path laser 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 Long path laser out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Long path laser in simple terms?

The Long Path laser was an early high energy infrared laser at the Lawrence Livermore National Laboratory used to study inertial confinement fusion. Long path was completed in 1972 and was the first ICF laser ever to use neodymium doped glass as the lasing medium.

Why does Long path laser matter?

Because it connects several physics 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 Long path laser?

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 Long path laser.

Tags

  • Inertial confinement fusion research lasers
  • Lawrence Livermore National Laboratory
  • Plasma physics stubs

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