MARK & WEDELL | Oldenvej 5 | 3490 Kvistgaard | Denmark | Phone: +45 49139822 |

MARK & WEDELL

CURRENT LEADS FOR SUPERCONDUCTING MAGNETS

MARK & WEDELL | Oldenvej 5 | 3490 Kvistgaard | Denmark | Phone: +45 49139822 | E-mail: m-w@m

CURRENT LEADS FOR SUPERCONDUCTING MAGNETS

� Facilities for helium leak measurement and pressure test

� Facilities for high voltage and isolation resistance measurement

� Full featured computer code for static and dynamic

� In house facilities for design, drawing and manufacturing

w@m-w.dk | Web: www.m-w.dk

FOR SUPERCONDUCTING MAGNETS

Facilities for helium leak

measurement and pressure test.

Facilities for high voltage and

isolation resistance measurement.

Full featured computer code for

static and dynamic analysis.

In house facilities for design,

drawing and manufacturing.

MARK & WEDELL | Oldenvej 5 | 3490 Kvistgaard | Denmark | Phone: +45 49139822 | E-mail: m-w@m-w.dk | Web: www.m-w.dk

MARK & WEDELL

INTRODUCTION

We have in collaboration with our customers designed and built

in excess of 80 vapour cooled current leads ranging from 600A

to 17kA and test voltage up to 5kV. Main weight is on resistive

current leads, but we have also designed and built current

leads utilising high temperature superconducting tapes. We

can design current leads to a wide range of specifications and

to suit existing equipment.

600A CURRENT LEADS

These leads were designed and built to meet CERN design-

specification. The integrated auxiliary heat exchanger

practically eliminates condensation on the helium return line

and surroundings. The illustrated leads are for 600A, insertion

length 1.4m, design pressure 20bar and high voltage

requirement 2kV in Helium gas.

600A CURRENT LEADS (INSERTED)

The same leads after insertion in

the cryostat. Warm terminals are

seen ready for accepting the

external current connection. The

upper part houses transmitters for

the integrated temperature probes.

Cable connections at the top are for

instrumentation.

HEAT LEAK CURVE

Flexible simulation code allows us to

optimise the current leads for specific

static or dynamic scenario. Current

leads can be designed using estimated

material properties and then

theoretically optimised when the final

material has been characterised.

60A CURRENT LEADS

For integration in the Large Hadron

Collider we have in collaboration with

CERN built in excess of 360 assemblies

of conduction cooled 60A current

leads, technically specified and

proprietary design by CERN.

FURTHER INFORMATION

Andersen T.P., Benda V., Vullierme B.: 600 A current leads with

dry and compact warm terminal, Cryogenics 2002, Prague,

Czech Republic.

Andersen T.P., Benda V., Vullierme B.: Series production of 13

kA current leads with dry and compact ... , ICEC 20, 2004,

Beijing, China.

(Courttesy of Dr. V. Benda, CERN)

(Courttesy of Dr. A. Ballarino, CERN)

Mark & Wedell has since 1974 supplied products,

specialized machinery and parts according to

customer specifications. This includes development,

manufacturing and testing of Current Leads,

Annullus for offshore, Water Quality Monitoring

and much more.