1. 19th Catia/SmarTeam Users’ Forum
CATIA V5 R23
How does the Product Engineering Optimizer workbench can help you improving your design?
HIE ISOLDE TUNER
Virtual Pivot Concept
02/04/2015
19th Catia/SmarTeam Users’ Forum

2. 19th Catia/SmarTeam Users’ Forum
HIE ISOLDE TUNER DEVICE OVERVIEW
02/04/2015
19th Catia/SmarTeam Users’ Forum

3. HIE Isolde QW cavity tuner
Niobium sputtered on bulk copper substrate
4.5 K, MHz, 6 MV/m , 10 W
Coarse tuning done by mechanical trimming
Requested fine tuning range 36 kHz, resolution 0.5 Hz
Initial Cu-Be “oil can” shape design
Costly
sensitivity 11 kHz/mm
Range 100 kHz higher than required
Range of fine tuning range based on uncertainty frequency at cold during testing prototypes
Flat plate design
Machined to 0.3 mm in
OFE copper
+ optimised tip gap
Courtesy of :
Kurt Artoos
Walter Venturini Delsolaro

4. 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

5. 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

6. 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

7. HIE Isolde QW cavity tuner
Courtesy of :
Kurt Artoos
Walter Venturini Delsolaro

8. 19th Catia/SmarTeam Users’ Forum
HIE ISOLDE TUNER DEVICE OVERVIEW
02/04/2015
19th Catia/SmarTeam Users’ Forum

9. 19th Catia/SmarTeam Users’ Forum
HIE ISOLDE TUNER DEVICE KINEMATIC
02/04/2015
19th Catia/SmarTeam Users’ Forum

10. 19th Catia/SmarTeam Users’ Forum
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 : 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. 19th Catia/SmarTeam Users’ Forum
HIE ISOLDE TUNER KINETIC SKELETON
02/04/2015
19th Catia/SmarTeam Users’ Forum

12. 19th Catia/SmarTeam Users’ Forum
THE PRODUCT ENGINEERING OPTIMIZER WORKBENCH
02/04/2015
19th Catia/SmarTeam Users’ Forum

13. 19th Catia/SmarTeam Users’ Forum
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. 19th Catia/SmarTeam Users’ Forum
THE PRODUCT ENGINEERING OPTIMIZER WORKBENCH
02/04/2015
19th Catia/SmarTeam Users’ Forum

15. HIE Isolde QW cavity tuner Results
Pei Zhang
Small cycles
hysteresis
100 cycles
3Hz
Variation due to pressure change
0.08Hz/step
Larger cycles
hysteresis
0.6Hz
0.11Hz/step
Courtesy of :
Kurt Artoos
Walter Venturini Delsolaro 15

16. HIE Isolde QW cavity tuner
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)
Coarse range
39 kHz
Pull to push
Courtesy of :
Kurt Artoos
Walter Venturini Delsolaro

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