How does the Product Engineering

Optimizer workbench can help you

improving your design?

02/04/2015 19th Catia/SmarTeam Users’ Forum 1

HIE ISOLDE TUNER

Virtual Pivot Concept

CATIA V5 R23

02/04/2015 19th Catia/SmarTeam Users’ Forum 2

HIE ISOLDE TUNER DEVICE OVERVIEW

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HIE Isolde QW cavity tuner

Niobium sputtered on bulk copper substrate 4.5 K, 101.28 MHz, 6 MV/m , 10 W

Initial Cu-Be “oil can” shape design

Costly sensitivity 11 kHz/mm Range 100 kHz higher than required

Flat plate design Machined to 0.3 mm in OFE copper + optimised tip gap

Coarse tuning done by mechanical trimming Requested fine tuning range 36 kHz, resolution 0.5 Hz

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

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HIE Isolde QW cavity tuner

OFE Cu : improved temperature margin for Nb layer for power dissipated

(L. Alberty)

Drawback: mechanical stresses in the tuning plate, very local plastification during first cycle

Not a problem

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

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HIE Isolde QW cavity tuner

• Motorization tuner outside cryostat for reliability and cost reasons • Operation under traction (small range available in push, 0.6 mm at tuning plate) • 1.8 Nm bi phase stepper motor with torque limiter at 1 Nm. • Micro stepping 8000 steps/turn • 1 mm pitch lubricated M6 Metric screw in bronze • Measured resolution motor 0.1 to 0.2 µm • Hysteresis under load : 1 to 2 µm

Reliability feature: Motor completely exchangeable without Dismounting the cryomodule (includes possible exchange of vacuum passage pulling rod )

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

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HIE Isolde QW cavity tuner

Tuner lever system: Compact system Two levers with Ti double knife edge pivots Flexural link between two levers Divides motion + forces by factor 10 with very low friction

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

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HIE Isolde QW cavity tuner

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

02/04/2015 19th Catia/SmarTeam Users’ Forum 8

HIE ISOLDE TUNER DEVICE OVERVIEW

02/04/2015 19th Catia/SmarTeam Users’ Forum 9

HIE ISOLDE TUNER DEVICE KINEMATIC

02/04/2015 19th Catia/SmarTeam Users’ Forum 10

STUDY INPUTS – KEY DATAS

Stepping motor : 8000 steps/rotation

Motor Stroke : +50mm / -6mm

Tuning plate distortion : -5mm / +0,6mm

Reduction ratio tuner stroke / motor stroke : 1/10

Very narrow space beneath the cavity

Tuning range : 36000 Hz

Tuning accuracy : +/- 0,5 Hz

Tuning plate theoretical resolution accuracy : +/- 40 nanometers !!!

No stick/slip phenomenon allowed due to the requested resolution !

Necessity to use friction-free pivots + a virtual pivot due to the

lack of space + resolution requirements

02/04/2015 19th Catia/SmarTeam Users’ Forum 11

HIE ISOLDE TUNER KINETIC SKELETON

02/04/2015 19th Catia/SmarTeam Users’ Forum 12

THE PRODUCT ENGINEERING OPTIMIZER WORKBENCH

02/04/2015 19th Catia/SmarTeam Users’ Forum 13

THE PRODUCT ENGINEERING OPTIMIZER WORKBENCH

Driving parameter

Driven parameter

Target Value (imposed parameter)

Optimization verification tool result

Optimization rule

Optimization automation tools

02/04/2015 19th Catia/SmarTeam Users’ Forum 14

THE PRODUCT ENGINEERING OPTIMIZER WORKBENCH

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HIE Isolde QW cavity tuner Results Pei Zhang

hysteresis

3Hz

0.08Hz/step

hysteresis

0.11Hz/step

0.6Hz

100 cycles

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Variation due to pressure change

Small cycles

Larger cycles

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

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HIE Isolde QW cavity tuner

Pull to push

Coarse range 39 kHz

Full tuner range 39 kHz Fatigue testing show no significant changes in behavior tuner Back lash when changing from pull to push due to change of contact in knife edge pivot (not expected operation situation) The hysteresis and resolution correspond to what was measured on the motor. This could be further reduced by using Planetary roller screws (not required for HIE ISOLDE)

Courtesy of : Kurt Artoos Walter Venturini Delsolaro

02/04/2015 19th Catia/SmarTeam Users’ Forum 17

THE PRODUCT ENGINEERING OPTIMIZER FAQ

Need help to handle this powerful tool ?

A dedicated FAQ is available on the CERN CAD Service website :

CERN CAD Service / FAQ / CATIA - Knowledge & Optimizer / Optimization in CATIA

02/04/2015 19th Catia/SmarTeam Users’ Forum 18

SPECIAL THANKS !!!

I would like to warmly thank M. Benoît Lepoittevin for the great support

he has provided to me on the Product Engineering Optimizer workbench

all along this project.