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Soudan 2

Soudan 2 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 Soudan 2 rather than just read about it. In short: Soudan 2 was a particle detector located in the Soudan Mine in Northern Minnesota, United States, that operated from 1989 to 2001. It was a 960-ton iron tracking calorimeter whose primary purpose was to search for proton decay, although its data were also used to investigate the properties of neutrinos.

Soudan 2 — main illustration
Soudan 2 — illustration

Key takeaways

  • Soudan 2 belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Soudan 2 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Soudan 2 from memory before moving on to harder problems.

Reference excerpt

Soudan 2 was a particle detector located in the Soudan Mine in Northern Minnesota, United States, that operated from 1989 to 2001. It was a 960-ton iron tracking calorimeter whose primary purpose was to search for proton decay, although its data were also used to investigate the properties of neutrinos. It found no evidence of proton decay, but it did help confirm Super-Kamiokande's atmospheric neutrino result, supporting the theory of neutrino oscillation. The Soudan Mine was also home to the MINOS and CDMS detectors.

History Soudan 2 was the successor to the Soudan 1, a similar 30 ton detector also intended to search for proton decay. The excavation for Soudan 2 was done in 1984–1985. Installation was started in 1986 and was completed in 1993. The experiment was run from April 1989 to June 2001, beginning with a partial detector of 275 tons. It was disassembled in 2005 to make room for further low background physics experiments, including MINOS.

References

External links The University of Minnesota's Soudan 2 page Argyrios Stassinakis's thesis: A Study of the Atmospheric Neutrino Flavour Content Using the Soudan 2 Detector SOUDAN-2 experiment record on INSPIRE-HEP

Illustrations

Soudan 2: On the right is the front wall of the Soudan 2 detector. The corrugated walls seen on the left, center and top of the image are parts of its veto shield.
On the right is the front wall of the Soudan 2 detector. The corrugated walls seen on the left, center and top of the image are parts of its veto shield.

Worked examples

Example 1 — a first encounter with Soudan 2

Start with the simplest possible case. Write down what Soudan 2 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 Soudan 2 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 Soudan 2 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 Soudan 2

In research
Soudan 2 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 Soudan 2 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
Soudan 2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in St. Louis County, Minnesota, Particle experiments, so understanding it makes those chapters shorter.
In everyday life
Look for Soudan 2 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 Soudan 2 in 20 minutes

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

Frequently asked questions

What is Soudan 2 in simple terms?

Soudan 2 was a particle detector located in the Soudan Mine in Northern Minnesota, United States, that operated from 1989 to 2001. It was a 960-ton iron tracking calorimeter whose primary purpose was to search for proton decay, although its data were also used to investigate the properties of neutr…

Why does Soudan 2 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 Soudan 2?

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 Soudan 2.

Tags

  • Buildings and structures in St. Louis County, Minnesota
  • Particle experiments

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