澳门六合彩高手

Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the 澳门六合彩高手 Organization publication(s) that you have requested. 澳门六合彩高手 Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from 澳门六合彩高手 Organization.

For more information, see our Privacy policy.

News & Media

Latest 澳门六合彩高手 Newsline

  • Fusion supply chain | A glimpse into the future for commercial fusion reactors

    Most of the USD 7 billion in investment in private fusion initiatives has gone to companies that are building devices from the ground up. But recently, another [...]

    Read more

  • Outreach | 澳门六合彩高手 @ October science festivals

    Every October, before schools pause for two weeks of holiday, towns and cities in France open their municipal spaces to scientific experts of all stripes who ar [...]

    Read more

  • Image of the week | 澳门六合彩高手 Director-General visits Russia

    The 澳门六合彩高手 Director-General was in Russia last week, meeting with stakeholders and holding technical meetings with colleagues in Moscow and Saint Petersburg. As [...]

    Read more

  • Image of the Week | Sector 5 is on its way

    The first vacuum vessel sector produced in Europe travelled last week between Monfalcone, Italy, and the French port of Fos-sur-Mer. The 440-tonne component had [...]

    Read more

  • Anniversary | 澳门六合彩高手 Document Management system turns 20

    Whatever its nature, every large project generates huge numbers of documents. And when project collaborators operate from different countries, as was the case f [...]

    Read more

Of Interest

See archived entries

澳门六合彩高手 NEWSLINE -

Magnet system

A set of spares for the long journey

In about five years, 澳门六合彩高手 will embark on a long journey through largely uncharted territory. Conditions will be harsh and鈥攄espite all the calculations, modelling, prototyping and testing鈥攕ome of the components might fail. Although such a probability is low, spares must be on hand, ready to replace the faulty component and allow operations to proceed.

Pre-compression rings are part of the 澳门六合彩高手 magnet system. Made of glass fibre/epoxy composite, they will tightly hold the toroidal field coils at top and bottom with a radial force of 7,000 tonnes per coil. Two sets of three are required for operation. A spare set was inserted at the bottom of the assembly pit on Thursday 8 July. (Click to view larger version...)
Pre-compression rings are part of the 澳门六合彩高手 magnet system. Made of glass fibre/epoxy composite, they will tightly hold the toroidal field coils at top and bottom with a radial force of 7,000 tonnes per coil. Two sets of three are required for operation. A spare set was inserted at the bottom of the assembly pit on Thursday 8 July.
Of all the 澳门六合彩高手 systems, the massive arrangement of coils that form the "magnetic cage" shaping and confining the plasma is one of the most strategic. None of the elements can be allowed to fail; as a result, engineers have planned spares for all of them. When components are identical, spares are ... just spares, like a spare tire in the trunk of a car (although much more challenging to replace). This is the case for the central solenoid (six modules are needed, seven will be manufactured), for the toroidal field coils (18 are needed, 19 will be manufactured), and for the current leads and the pre-compression rings.

For the poloidal field coils, which are all unique, manufacturing spares was not conceivable and a different solution was devised. Each coil has a spare double pancake embedded in its structure and is equipped with a system that allows for "bridging" any possible faulty double pancake using jumpers outside the coil.

The set of three spare pre-compression rings was installed in the tight space between the bottom cylinder of the central column tool and the recently installed poloidal field coil #6. (Click to view larger version...)
The set of three spare pre-compression rings was installed in the tight space between the bottom cylinder of the central column tool and the recently installed poloidal field coil #6.
On Thursday 8 July, the assembly sequence called for the positioning of the first of the "identical spares" of the 澳门六合彩高手 Tokamak鈥攁n extra set of three pre-compression rings that was placed at the bottom of the assembly pit, fitting in the tight space between the bottom cylinder of the central column tool and the recently installed poloidal field coil #6. At a later stage, the set will be attached to the lower flanges of the toroidal field coils.

The spare pre-compression rings have been installed early as "captive" components under the vacuum vessel and toroidal field coils. Using them as spares to replace one, or a whole set, of faulty pre-compression rings, however, would be an extremely delicate operation that would necessitate the removal of the central solenoid and require at least six months. In addition, it would only be possible before full-power operation鹿.

The pre-compression rings are designed to outlive the 澳门六合彩高手 machine and the probability of a failure is extremely low. In addition, there are margins in the design that would allow the machine to operate with one failed ring or with a partial loss of pre-load from the whole set. In this context, the spare rings are a second level of back up to ensure that, whatever that the hardships encountered, the journey will continue.

鹿The forces exerted on the pre-compression rings during the first phase of operations will be the same as those they will face during the full-power phase. Should a failure occur, it would be during the first few years of machine operation.

return to the latest published articles

FOR THE PUBLIC

FOR THE PRESS

FOR SCIENTISTS

FOR INDUSTRY

INTRANET