Nitrogen thermal cycles of 4K RL samples procedure

This document contains the procedures for the thermal shock tests of the QM-like 4 K Reference Load targets bonded on Aluminum without envelo

LVHX2/LFI mechanical interface verification

The scope of this technical memo is to describe our analysis of the interface between the Sorption Cooler Cold End, LVHX2 + TSA stage, and the LFI main frame. This work is intended to be a general qualitative analysis of the IF providing a worst case analysis of the mechanical interface to justify or propose recommended configurations for flight. In the third Chapter a general description of the mechanical analysis of the interface is presented in order to provide the basic tools to understand the discussed issues

Nitrogen thermal cycles of 4K RL samples report

The purpose of this document is to report results of the thermal shock tests in a controlled environment for the sample

NISP instrument thermal design, justification file and FEM study

This document describes the NISP thermal architecture and the justification of its design. The demonstration of the validity of such design in terms of meeting the baseline requirements relies on the results of the detailed thermal FEM analysis of the instrument. The thermal architecture is based on the Instrument PLM thermo-mechanical configuration and on the favourable conditions of the L2 thermal environment. For this reason the driving objective of the NIP thermal design is to maximize exploitation of passive cooling and instrument performances while minimizing design complexity. The analysis has been performed using a finite elements code (Abaqus). The NISP CAD model has been imported in the Abaqus environment and detailed with a fine mesh structure (around 105 nodes): both the conductive and radiative heat transfer in operational and non-operational conditions has been simulated in three main thermal cases, Hot, Nominal and Cold conditions. Results in terms of heat loads at the main internal and external interfaces are reported together with the temperature distribution of the instrument units. This document shall be used as a reference for the NISP thermal design and FEM simulation, as it contains a description of all assumptions and definitions for the model

Results from SKL displacement measurements using pulley devices

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

Recent progress on color confinement

The status is reviewed of the dual superconductivity of QCD vacuum as a mechanism of color confinement.Comment: 8 pages. Invited talk at the conference QCD@Work 2007, Martina Franca (Italy) June 16-20 200

CSL optical shield: proposal for device measuring displacement

Scope of this document is to propose a possible conceptual sketch of a simple device for measuring the displacement of the CSL PLANCK optical shield, due to the thermal contraction of the support structures at cryogenic temperatures

4KRL dummy FM design and verification

Purpose of this document is to describe the 4KRL dummy FM unit and the verification activities performed by the 4KRL development team before delivering it to the HFI

PLANCK\LFI 4K Reference Load Test Plan

The purpose of this document is to describe the tests to be performed on the QM, FM, and FS 4KRL uni