Results from SKL displacement measurements using pulley devices

Date Issued
2008
Author(s)
•
Abstract
The design of the new sky load simulator used in the CSl cryo facility for FM test campaign set very tight requirements on the accuracy of positioning w..r.t. the FPU (LFI and HFI feeds). A thermo mechanical contraction of structures supporting the SKL is expected when going in cold conditions ( optical shield at 4 K, environment between 20 K and 60 K), causing a wrong displacement w.r.t. the nominal position. A thermo mechanical CAD model was prepared by AMOS , to evaluate by FEM simulations the expected displacement. It can be accounted in warm conditions to correct in advance the SKL position before going to cryo. A test was prepared to verify the expected displacement during the Planck Blank test ( March 2008) using simple devices, described in (RD 7) . The test was successfully performed in CSL and here follow the main results.
Volume
PL-LFI-PST-RP-032
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Rights
open.access
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ESA-43.pdf

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