science

Synchrotron Radiation Source

Synchrotron Radiation Source is a science 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 Synchrotron Radiation Source rather than just read about it. In short: The Synchrotron Radiation Source (SRS) at the Daresbury Laboratory in Cheshire, England was the first second-generation synchrotron light source to produce X-rays. The research facility provided synchrotron radiation to a large number of experimental stations and had an operating cost of approximately £20 million per annum.

Key takeaways

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

Reference excerpt

The Synchrotron Radiation Source (SRS) at the Daresbury Laboratory in Cheshire, England was the first second-generation synchrotron light source to produce X-rays. The research facility provided synchrotron radiation to a large number of experimental stations and had an operating cost of approximately £20 million per annum. SRS had been operated by the Science and Technology Facilities Council. The SRS was closed on 4 August 2008 after 28 years of operation.

History Following the closure of the NINA synchrotron, construction of the facility commenced in 1975 and the first experiments were completed using the facility by 1981. In 1986 the storage ring was upgraded with additional focusing to increase the output brightness, the new 'lattice' being termed the HBL (High Brightness Lattice).

Design and evolution Like all second-generation sources, the SRS was designed to produce synchrotron radiation principally from its dipole magnets, but the initial design foresaw the use of a high-field insertion device to provide shorter-wavelength electromagnetic radiation to particular users.

The first storage ring design was a 2 GeV FODO lattice consisting of alternating focussing and defocussing quadrupoles, with one dipole following every quadrupole (i.e. two dipoles per repeating cell), giving a natural beam emittance of around 1000 nm-rad with 16 cells. The HBL upgrade implemented in 1986 increased the total number of quadrupoles to 32, whilst retaining the same number of cells and geometry, and reduced the operating emittance to around 100 nm-rad in the so-called 'HIQ' (high tune) configuration. A 'LOQ' (low tune) configuration was also provided, to allow the efficient storage of one intense bunch of electrons (instead of up to 160), to provide radiation bursts at 3.123 MHz (the revolution frequency of the electrons, corresponding to the 96 m circumference). The design of the SRS consisted of a 5 MeV electron gun at the start of an injector linac, which increased the energy to 12 MeV, to feed into a booster ring which boosted the electrons up to 600 MeV, which then fed into and filled up the storage ring. Once the storage ring was "full", the booster and linac were powered down and the energy of the storage ring was then ramped up to 2 GeV. Due to this design, the storage ring could not be topped up by the linac and booster until the storage ring was turned off, when the beam current was too low for experiments to take place. In the original design, the typical initial circulating current was around 300mA but after the HBL upgrade it was decreased to around 220mA. The beam current would slowly drop over the course of several hours, when it would then have to be "re-filled", however it could be maintained at current of around 200mA for over 30 hours. The storage ring had 16 dipole magnets, from which 15 tangental beamlines supplied synchrotron light to the many different stations. Beamline 15 did not provide light to experimental stations, likely due to space constraints, so instead it only featured a beam monitoring unit.

Stations and beamlines The SRS had 16 beamlines which had many different functions. Below is a list of the experimental stations and their purposes;

Scientific output and achievements The SRS supported a broad range of science, including pioneering work on X-ray diffraction, structural molecular biology, surface physics and chemistry, materials science and upper atmosphere physics. Following its closure, a detailed study of the economic impact of the SRS was made. Two Nobel Prizes in Chemistry have been received by scientists who performed part of their prize-winning research using the SRS: Sir John E. Walker in 1997 for his contribution to the understanding of the synthesis of ATP (Adenosine Triphosphate), a key component of the body’s energy transport, and Sir Venki Ramakrishnan for his work on the structure and function of the ribosome, the molecular machine that constructs proteins from ‘instructions’ coded in mRNA. Over 5000 academic papers were produced.

Illustrations

Worked examples

Example 1 — a first encounter with Synchrotron Radiation Source

Start with the simplest possible case. Write down what Synchrotron Radiation Source claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Synchrotron Radiation Source 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 Synchrotron Radiation Source 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 Synchrotron Radiation Source

In research: Synchrotron Radiation Source appears in science 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 Synchrotron Radiation Source 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: Synchrotron Radiation Source is common in secondary-school and first-year university syllabi. It links to neighbouring topics Research institutes in Cheshire, Science and Technology Facilities Council, Synchrotron radiation facilities, so understanding it makes those chapters shorter.
In everyday life: Look for Synchrotron Radiation Source 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 Synchrotron Radiation Source in 20 minutes

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

Frequently asked questions

What is Synchrotron Radiation Source in simple terms?

Why does Synchrotron Radiation Source matter?

Because it connects several science 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 Synchrotron Radiation Source?

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 Synchrotron Radiation Source.