physics

Vulcan laser

Vulcan 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 Vulcan laser rather than just read about it. In short: The Vulcan laser is an infrared, 8-beam, petawatt neodymium glass laser at the Rutherford Appleton Laboratory's Central Laser Facility in Oxfordshire, United Kingdom. It was the facility's first operational laser.

Key takeaways

Vulcan 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 Vulcan laser to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vulcan laser from memory before moving on to harder problems.

Reference excerpt

The Vulcan laser is an infrared, 8-beam, petawatt neodymium glass laser at the Rutherford Appleton Laboratory's Central Laser Facility in Oxfordshire, United Kingdom. It was the facility's first operational laser. It is designed to deliver irradiance on target of 1021 W/cm2 for a wide-ranging experimental programme in fundamental physics and advanced applications. This includes the interaction of super high intensity light with matter, fast ignition fusion research, photon induced nuclear reactions, electron and ion acceleration by light waves, astrophysics in the laboratory and the exploration of the world of plasma dominated by relativity. In 2005 the Vulcan laser was the highest-intensity focussed laser in the world, certified by the Guinness Book of World Records, capable of producing a petawatt laser beam with a focused intensity of 1021 W/cm2.

Target Areas There are currently two active target areas, Target Area Petawatt and Target Area West, Following the decommission of Target Area East.

Target Area West Target Area West operates with dual short pulse beamlines delivering intensities of 1019 W/cm2 for pump-probe experiments using F3 focussing optics, other configurations are available. Six long pulse beams can be configured alongside the short pulses in multiple configurations, including single side cluster, cylindrical and spherical compression. The long pulse beams can be operated with pulse lengths from 0.5ns up to 8ns and energy from 50J to 300J per beam. Various pulse configurations can be set, including pre and post pulses.

Target Area Petawatt Target Area Petawatt provides a single short pulse on target with a long pulse beamline, It is configured to deliver the highest intensity via a large parabolic mirror. As with Target Area West, various pulse configurations are possible.

Performance Vulcan can deliver 500J on target in a compressed pulse of 500fs giving a peak irradiance of 1021 W/cm2 in a 5μm focal spot. This performance is not possible solely by Nd:glass amplifiers, since gain narrowing would reduce the pulse bandwidth below a limit required to support the pulse duration.

A novel front end amplification system based on Optical Parametric Chirped Pulse Amplification (OPCPA), involving the pulse being stretched temporally pre-amplification, followed by a pulse compressor. This generates pulses of around 10mJ at a large bandwidth (1 mJ nm−1) for injection into the Vulcan rod and disc amplifier chain. The amplifier chain is optimised for bandwidth using a combination of Nd:phosphate and Nd:silicate amplifying media. An Adaptive optics (AO) system implemented to improve the beam quality to near diffraction limited.

See also Central Laser Facility Rutherford Appleton Laboratory List of laser types Chirped pulse amplification National Ignition Facility

References

External links Vulcan and other lasers at the CCLRC Vulcan laser Brenner, Ceri. "Super Intense Laser". Backstage Science. Brady Haran.

Illustrations

Worked examples

Example 1 — a first encounter with Vulcan laser

Start with the simplest possible case. Write down what Vulcan 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 Vulcan 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 Vulcan 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 Vulcan laser

In research: Vulcan 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 Vulcan 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: Vulcan laser is common in secondary-school and first-year university syllabi. It links to neighbouring topics Inertial confinement fusion research lasers, Nuclear research institutes in the United Kingdom, Research institutes in Oxfordshire, so understanding it makes those chapters shorter.
In everyday life: Look for Vulcan 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 Vulcan laser in 20 minutes

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

Frequently asked questions

What is Vulcan laser in simple terms?

Why does Vulcan 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 Vulcan 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 Vulcan laser.