"Green Magnets" to save energy in accelerators

Margarita Synanidi — Thu, 27 Nov 2014 10:22:24 +0000

"Green Magnets" to save energy in accelerators
by Livia Lapadatescu (CERN), Thomas Hind (CERN)

Fig 1: Green Magnets developed at Danfysik
Image credit: Danfysik

A partnership of universities and industry have produced “Green Magnets” which give more than 95% electrical efficiency savings. The “Green Magnets” technology could be used to replace non-superconducting accelerator electromagnets.

The idea for the magnets, which work by using very strong permanent magnetic materials based on rare earth minerals and shaping them in such a way to provide the desired magnetic field, originated at the International Climate Summit in Copenhagen in 2009. The partners expressed a desire to save energy and cut carbon emissions in accelerators and identified magnets as their primary power consumer. Breaking their set target of reducing power consumption by 75%, they managed to achieve a 95% cut in energy use in the magnets, as well as removing the need for water cooling infrastructure, heavy cabling and large power supplies.

The magnets were developed through a project run by five partners from academia and industry (Aarhus University, Aalborg University, Aarhus School of Engineering, Sintex A/S and Danfysik A/S). With financial support coming from Danish Advanced Technology Foundation the consortium is able to replace non-superconducting electromagnets of up to 1 Tesla which need not more than +/- 25% field variation during operation.

Having overcome various technical challenges, such as temperature stability and radiation resistance, what remains now is the challenge of increasing the focus of labs on energy consumption and sustainability, in addition to successfully marketing the need for more energy efficient magnets such as the Green Magnets.

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permanent magnets

energy efficiency

industry

Knowledge Technology Transfer

issue 11

First industry magnet for SESAME storage ring

Margarita Synanidi — Thu, 18 Sep 2014 08:58:29 +0000

First industry magnet for SESAME storage ring
by Attilio Milanese (CERN)

   Fig1: View of the first series SESAME sextupole from the correctors connection side.
   Image credit: CNE Technology Center

In July 2014, a sextupole corrector magnet for the SESAME storage ring arrived at CERN for tests and magnetic measurements. It is the first unit out of 32 to be delivered by CNE Technology Center, a Cypriot based company under the EU-CERN CESSAMag project.

In November last year, a pre-series sextupole for SESAME was prepared at CERN, to check the design and to tune the manufacturing procedures before placing the order for the series production to industry. The contracts were then awarded to a Cypriot and a Pakistani company. The CERN team has been working closely with both companies to transfer the knowledge from CERN needed to build these magnets.

The first unit out of the 32 magnets from Cyprus has already arrived and was tested at CERN. Measurements carried out at CERN together with SESAME colleagues on this magnet show a very precise assembly, resulting in magnetic field homogeneity of 0.2‰ within 2/3 of the aperture. The unit is also mechanically, electrically and hydraulically sound, assuring good reliability during operation. This makes the magnet apt for the lattice of a synchrotron light source such as SESAME and it is a major step in preparing the SESAME storage ring.

The Cypriot company has in parallel also assembled more than 50% of the components needed for the rest of the contract. At this point the first magnet from Pakistan is currently being assembled.

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SESAME

CESSAMag

sextupole

Knowledge Technology Transfer

issue 11

accelerating-news-arc.web.cern.ch - Knowledge Technology Transfer

"Green Magnets" to save energy in accelerators

First industry magnet for SESAME storage ring