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Plans for the stavelets 8/21/19 (CV, PG, VC)
Goal: load heaters and measure thermal performance before and after irradiation to validate the glue adhesive choice and application
Ideally we would like to do this w and w/o araldite dots – YES
- 3 stavelets available (with heaters scraped off)
- Notice that dimensions/material is different - which of them is the closest to the actual detector?
- We had 5 in total
- https://docs.google.com/spreadsheets/d/1sRQGOEt-tPp5GND5u0Be2pRa7I8mnm7PT83Qhs2TdIk/edit#gid=0
- 7 compatible heaters available (~quad size) + additional new heaters
- How many heaters per stavelet?which size?
- Do we want to have 2 heathers on one side and 1 on the other?
- This configuration would be only close to the the ring one (and not even completely), so most likely only two heathers on the same side
- Do we want to have 2 heathers on one side and 1 on the other?
- Which fixture for loading?
- Thickness SE4445 100 or 150? Both
- Can we measure thermal performance w/o the test box?
- IR camera only to begin with
- Ideally we want to do a thermal cycle -40C+40C
- If we are late we can think of testing them at CERN with Nicola’s setup
- Nicola has a home-made setup to thermal test small coins (see https://docs.google.com/document/d/1ayth5fWjUCcth11pEL1smGKOGTwjPY11cE2172EGlcM/edit)
- The stavelets would not fit
- We need to decide exactly what to test and how to test it
If we say we want to test heathers on stavelets with and without araldite, each of them with 100 and 150 um SE4445 we have
SE4445 + Araldite (100)
SE4445 + Araldite (150)
SE4445 (100)
SE4445 (150)
For a statistically meaningful test we would probably need 3 samples for each configuration, but we don't have enough stavelets.
So maybe more samples for the configuration we would like to use in the actual detector:
3x SE4445 + Araldite (100)
3x SE4445 + Araldite (150)
2x SE4445 (100)
2x SE4445 (150)
What about the non-perfect edges? Do we test this to somehow? Given Charlie's calculation even if ~20% of the surface is not cover by glue, we would have a 1^ difference in Temperature which the IR camera can't even detect
General question: test also with the RTDs?