MICRO VERTEX DETECTORZEUS experiment at DESY (HAMBURG)

PROJECT SPECIFICATIONS:•Design and production of a silicon Micro Vertex Detector (MVD) for the ZEUS experiment at the HERA accelerator in DESY (Hamburg). With this new detector the positions of the charged particles, which are produced by the electron-proton collisions, will be measured with extremely high precision (10 micron).

PROJECT GROUPS :•Desy-Hamburg, Desy-Zeuthen, Hamburg Un., Bonn Un. (Germany) Nikhef (Netherlands) , Padova Un. (Italy) , Oxford Un., UCL (UK) , KEK (Japan)

NIKHEF SUPPORT:•Design and production of the silicon detector support structures.•Assembly and precise geometrical measurement of the complete detector. •Design and test of the cooling system for the readout electronics

IMPORTANT DESIGN REQUIREMENTS:•Extreme light and stiff construction to achieve:

• high position accuracy (5-10 micron) • low radiation length, such that the trajectory of particles is hardly disturbed

•These requirements results in using high-tech materials and construction methods.

MECHANICAL TECHNOLOGY GROUP

1997 1998 1999 2000 2001

Finish design state

LADDER WITHSILICON DETECTORS

WHEEL WITHSILICON DETECTORS

SUPPORT STRUCTURE

BEAMPIPE

Physicaldesign proposal

Installation in ZEUS detector

Start elaboratedesign idees

Start prototype work Start production

Detail designs

www.nikhef.nl/pub/departments/mt/projects/zeus/vertex

Designs and calculations are made with the help of the

computer before production or manufacturing prototypes

MECHANICAL TECHNOLOGY GROUP

ZEUS MICRO VERTEX DETECTOR DESY

COMPUTER AIDED DESIGNS (CAD)

MODULE

LADDER

WHEEL

Rear Barrel FlangeForward Barrel Flange

Transport/ Assembly Frame

MECHANICAL TECHNOLOGY GROUP

ZEUS MICRO VERTEX DETECTOR DESY

FINITE ELEMENT CALCULATIONS

COOLING TESTS

LADDER DEFORMATION

MODULE TEMPERATURE SIMULATION

INFRARED PICTURE

WHEEL DEFORMATION

Mockup Cooling Setup

COMPUTER AIDED DESIGNS (CAD) Ladder Assembly Jig

MECHANICAL TECHNOLOGY GROUP

ZEUS MICRO VERTEX DETECTOR DESY

PROTOTYPES

Forward Barrel Flange

Rear Barrel Flange

Carbon Ladder Support Structure

Carbonfibre/Nomex honeycomb shell

Barrel + 3 ladders

Barrel prototype

Carbonfibre Wheel Support Structure

MECHANICAL TECHNOLOGY GROUP

ZEUS MICRO VERTEX DETECTOR DESY

PRODUCTION

Carbonfibre/Nomex honeycomb sandwich shells produced at Composites Lab of Aerospace Technology

(Haarlem University of Professional Education)

Finish milling Wheel Support Structure

Finish milling Rear Barrel Flange

3D measuring Wheel Support Structure

3D measuring Barrel

Barrel

Glue JigSupport Tube MVD

Ladder Assembly Jig

WORKSHOP AT NIKHEF

Carbon Fibre Filled windingWheel Support Structure

Silicon Rotation Device

Rear End Flange

Rear Barrel Flange