1 / 9

MSCB(MS) inter-axis in SSS

MSCB(MS) inter-axis in SSS. Study on 32 SSS of MS magnetic inter-axis and MSCB mechanical inter-axis from measurement made after cold test (WP18). Acknowledgments Bernard Jeanneret, Arnaud Devred, Jean-Pierre Koutchouk, Mikko Karppinen, Elena Wildner. What is the situation now? (1/2).

augusta-dante
Download Presentation

MSCB(MS) inter-axis in SSS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MSCB(MS) inter-axis in SSS Study on 32 SSS of MS magnetic inter-axis and MSCB mechanical inter-axis from measurement made after cold test (WP18). Acknowledgments Bernard Jeanneret, Arnaud Devred, Jean-Pierre Koutchouk, Mikko Karppinen, Elena Wildner Jerome Beauquis AT-MAS

  2. What is the situation now? (1/2) • Magnetic inter-axisout of tolerance • Spread larger for magnetic (+/- 1.5 mm) than for mechanical (+/- 1 mm). Jerome Beauquis AT-MAS

  3. What is the situation now? (2/2) 2 1 For mechanical and magnetic measurement : - quadrant 2 and 4 are mainly filled => inter-axis too large or too small. - quadrant 1 and 3 are not much populated => inter-axiswell centered. 3 4 2 1 4 3 Ap1 Ap2 Jerome Beauquis AT-MAS

  4. MS correlation mech vs. mag • Good correlation • but correlation factor different of 1 (around 2) between magnetic and mechanic Jerome Beauquis AT-MAS

  5. Mechanical vs magnetic • the factor 2 found for MS may indicate an error in the feed down calculation. • For others magnets in SSS, the same (or nearly) factor is found • the previous hypothesis is not checked • It comes from an inversion of sign in the software measurement (see talk of Juan). Jerome Beauquis AT-MAS

  6. only few points (1 to 6) measured on the MS • MS represent 1/3 of the total length of MSCB assembly. Study on the MSCB good correlation => MS and MCB well aligned one respect to the other one good correlation => no artifact from system measurement for mechanical measurement MS/MSCB --- GEO/AC mole Jerome Beauquis AT-MAS

  7. Flanges & MQ inter-axis • NO correlation between MSCB inter-axis and arounding elements (flanges and MQ) • Spread much larger (3 to 4 times more) for MSCB than for MQ or flanges. • Cold bore tube movement along the SSS. Jerome Beauquis AT-MAS

  8. Inter-axis comparison Jerome Beauquis AT-MAS

  9. Conclusions • Magnetic measurement have to be rejected. • Database have to be updated • Id Cards and/or slot allocation update ? • Mechanical measurement also? • Final tolerance after MSCB assembly completion for transversal misalignment for 1 aperture is 0.23 mm. • Most (all?) of MSCB’s module are in tolerance after assembly in Tesla. • Cold bore tube movement : • What are tolerances on CBT undulation? • Deformation of CBT during his insertion in SSS? • Other issue : study of location of maximum delta X along SSS axis. Jerome Beauquis AT-MAS

More Related