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<h3> VELO Facts </h3> 

<ul>
<li> VELO stands for VErtex LOcator
<li> The VELO project started in 1997.
<li> The VELO consists of 42 modules arranged in two "halves" (each half holds 21 modules).
<li> The VELO halves move to within
 7mm of the LHC proton beams during data taking (and retract afterwards).
<li> Each VELO module can detect the position of a charged particle passing through it to an accuracy of up to 0.00001 m
<li> The modules are assembled in one of the cleanest places on earth - a class 100 cleanroom (criteria: less than 100 particles of dust per cubic foot of air)
<li> Each module contains 50m of wire to connect the electrical components together.

<li> It takes about 1000 hours to make one module (200 hours of commercial part manufacture and about 800 hours of assembly and testing).
<li> Each module costs about 10 000 GBP (materials cost - the real cost including labour, design and prototyping would be much higher)

</ul>

<h3>Who's involved in the VELO </h3>
<ul>
<li> CERN
<li> Ecole Polytechnique Federale de Lausanne
<li> NIKHEF
<li> Syracuse University
<li> University of Glasgow
<li> University of Heidelberg
<li> Univeristy of Liverpool

</ul>

<h3> Commercial companies involved </h3>

<ul> 
<li> Ceramaseal, USA: connectors for feed through flanges.
<li> Flexible Technology Ltd., UK: cable manufacture.
<li> GS Praezisions AG, Switzerland: cable manufacture.
<li> Hawk Electronics, UK: hybrid population.
<li> Hositrad Holland, Netherlands: feed through flanges for cables.
<li> Micron semiconductor, UK: sensor manufacture.
<li> Swagelok Nederland BV, Netherlands: cooling system.
<li> Shell, Netherlands: CO2 transport capillaries.
<li> Siemens, Germany: PLCs.
<li> Stevenage Circuits, UK: hybrid lamination.
<li> Thermo Vacuum Generators, UK: vacuum vessel manufacture.
<li> Wagenaar Koeltechniek, Netherlands: freon cooler.

</ul>

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