SVD Mechanics in Pisa Filippo Bosi INFN-Pisa on behalf of the SVT - PowerPoint PPT Presentation

SVD Mechanics in Pisa Filippo Bosi INFN-Pisa on behalf of the SVT Group F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 1 2015

Outline • L5 prototype module Tests – Module Metrology – Vibrational Analisis (preliminary) • Origami cooling tube attachment – First Conceptual Design 2 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Module Support -The support for the test has been realized with the same fixation system, the same material and same mechanical precision like foreseen in the experiment conditions. -The support was designed with low weight and high inertia in order to get the maximum K equivalent factor. The goal was to assure high level of resonance frequency for the support respect to the wich espected for the module, in order to avoid any additional forcing on the module itself. -The purpose of the test was to know the natural frequency of the module (the modal analysis) in relation to the the shipping and experiment conditions . F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015 3

Module Support AISI440 silicon cross for reference plane XY Reference Z plane Aluminum Alloy ALCOA5000 Endring Block Backward AISI 440 Endring Block Forward 4 AISI 440 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Module Test Mechanical/geometrical tollerance like foreseen in experiment 5 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Module Test Pin Support for reference cross of XY plane 6 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Module Metrology CMM Mitutoyo BHN 607 with no contact method ( precision on Z coordinates with focus tecnique + 5 micron ) . A module metrology has been realized before the test in order to check any geometric variation durng the test. End Ring Block F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Module Metrology XY System reference N.4 cross reference on System reference the Hybrid. N.15 cross reference on the sensors region. 8 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Ladder Vibrational Test -Test Shaker : Tyra-TV5220 -Shaker Controller: Data Physics-Signal Star Vector -Dynamic Shaker max load 8 kg at 8 G up to 2000 Hz Accelerometer: KS777MMF weight 0,5 gramms Vibrational Test programm: - Sine test cycle up to 1500 Hz on vertical/horizzontal axes -Sine sweep 20/1500 Hz in continuos way to measure the modals / resonance frequency of the ladder; -Random test according to a random vibration environment of shipping (truck and flight transportation) - Shock test 7

Module Vibrational Test 1) N.3 Test performed on the support at 0.6 G with continuos sweep from 20 to 1000Hz. Accelerometer positioned near the Endring Block with adesive tape . Evidence of resonance at 920 Hz. 2) N.1 Test performed on the system support+module at 0.2 G with continuos sweep from 20 to 1000 Hz. Accelerometer positioned in central module region with adesive tape. Evidence of dinamic behavior at around 120 Hz. Other instability around 300, 500, 700 and 800 Hz 3) N.4Test preformed on the system support+module at 0.6 G with continuos sweep from 20 to 1000 Hz. Accelerometer positioned in central/lateral module region with adesive tape. Evidence of dinamic behavior around 120 Hz. Other instability around 300, 500, 700 and 800 Hz F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Support Vibrational Test Resonance Support Vibrational Analysis 0,6 G 920 Hz F.Bosi, BELLE2 VXD Workshop, Trieste, 11 Sept. 10th 2015

Vibrational Module Test q Module Vibrational analysis 0,2 G F.Bosi, BELLE2 VXD Workshop, Trieste, 12 Sept. 10th 2015

Vibrational Module Test Module Vibrational Analysis 0,6 G 13 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Metrology Results Some strong geometry variation on the z coordinate (about 250 micron) while the variation in X,Y is below 100 micron. F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015 14

Random Vibrational Test 4-20 Hz 10-100 Hz Test: Three consecutive sequence of random vibration profile (30 minutes for international flight @ 0.52 G rms truck - 1,06 G rms Air - 0.52 G rms truck ) 15 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Vibration Module Test - We performed only a preliminary test on the module on the vertical direction. - We have to repeat the test on the horizzontal direction at 0.2 G with a special mechanichal support to position the module respect the shaker. - Altough there is a strong variation in the module geometry long Z axes (*), but considering the stress of the test at 0,6 G the general impression is that the module is anyway robust and stiff . (*) ( strong deformation in z coordinates in the region of the Hybrid could also due to a hard handling for a problem accors during one demounting module operation) . - To perform the random vibrational test we think to follow the FedEx specification, using the transport box like support for the test. 16 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Origami tube attachment For the Origami cooling tube attachement is usefull to make use of the Ladder Mount mechanical set in KEK + some specific support to hold the cooling tube set in hits specific shape: The sistem could be realized by: - A cradle support able to keep the cooling tube set in a shape consistent with the geometry defined by the clamp position on the ladder on the SVD; - A mechanical system, (two arm support like), supported by the tower of ladder mount micropositioner, able to hold the cradle support and to move it on the expected position above the SVD, exactly at the top of the ladder clamp; - At this point by hand or with a specific pusher tool, is possible to close any single arm of the cooling set tube on the ladder clamp. F.Bosi, BELLE2 VXD Workshop, Trieste, 17 Sept. 10th 2015

Cooling Tube Attachment - Because is not possible to position the cooling tube set by only a rigid movement we need a system that allow the cradle to rotate respected a precise axis (coaxial at one arm of the cooling tube) and wrap around SVD without touching component. - The cooling tube is hold in position on the cradle by vacuum chuck and/or clamping system that leave free the cooling tube surface in contact with the ladder clamp. Vacuum chuck cradle support F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015 18

Origami tube attachment Cradle Support Cooling tube Axis of rotation Ladder Mount Positione tower Two Arm Support Cradle support: rotational final position 19 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Origami Cooling tube Attachment Cradle Support Axis of rotation Cradle support: rotational final position 20 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Cooling Tube Attachment Rotational axis Cradle support: Cradle support: initial rotational position final rotational position 21 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Cooling tube attachment ction Position Axis of rotation last ladder clamp firstr ladder clamp Final position cooling tube position after rotation ; distance respect to the ladder clamp 22 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Origami tube attachment This distance is not that considered in the present C.D. (2mm larger) 23 F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015

Conclusion - The Vibrational test on the ladder L5 has started , we have preliminary results and we need to pass to the random test; for this test need a final transport box - The conceptual design of the Origami Cooling tube is started, we can produce a prototype of Cradle Support and test the reliability of the chuck system - For the B2Gm the design shoul be engineered and ready for prototype realization F.Bosi, BELLE2 VXD Workshop, Trieste, Sept. 10th 2015 24