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Hi,
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<div class="">here I have some logbook notes from the last days (some of it you have already seen):</div>
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<div class=""><a href="https://gluexdirc.mit.edu/day-1" class="">https://gluexdirc.mit.edu/day-1</a></div>
<div class=""><a href="https://gluexdirc.mit.edu/day-2" class="">https://gluexdirc.mit.edu/day-2</a></div>
<div class=""><a href="https://gluexdirc.mit.edu/day-3" class="">https://gluexdirc.mit.edu/day-3</a></div>
<div class=""><a href="https://gluexdirc.mit.edu/day-4" class="">https://gluexdirc.mit.edu/day-4</a></div>
<div class=""><a href="https://gluexdirc.mit.edu/day-5" class="">https://gluexdirc.mit.edu/day-5</a></div>
<div class=""><a href="https://gluexdirc.mit.edu/day-6" class="">https://gluexdirc.mit.edu/day-6</a></div>
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<div class="">I’ll prepare a report about the cookies for the Friday meeting.</div>
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<div class="">Mike: the ratio 100 : 2.5 is the one Belle II people were using and we took it as a starting point.</div>
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<div class="">Best regards,</div>
<div class="">Maria</div>
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<div class="">On Oct 14, 2016, at 9:29 AM, Michael Williams <<a href="mailto:mwill@mit.edu" class="">mwill@mit.edu</a>> wrote:</div>
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<div class="">This all looks like more fun that what I've been doing this week ;-) </div>
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<div class="">My only comment for now is that below and at the bottom of the webpage you say 100:2.5 --- is that right or is it 10:2.5? </div>
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<div class="">I'd like to request that at the next DIRC meeting that you summarize where we are with these tests, but also if you could put together a refresher overview of the goals for these cookies that'd be great, as I'm now forgetting a lot of the basics
like how stiff do we want them to be, etc.</div>
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<div class="">Mike</div>
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<div class="">On Oct 14, 2016, at 8:13 AM, Maria Patsyuk <<a href="mailto:mpatsyuk@mit.edu" class="">mpatsyuk@mit.edu</a>></div>
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Hi,
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<div class="">here is the summary of the day 2:</div>
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<div class=""><a href="https://gluexdirc.mit.edu/day-2" class="">https://gluexdirc.mit.edu/day-2</a></div>
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<div class="">In short:</div>
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<div class="">1. RTV615 with the standard mixing ratio gives a cured silicone pad, it is quite stiff.</div>
<div class="">2. we noticed, that it is a bad idea to put the molds filled with silicone into the vacuum to degas</div>
<div class="">3. cookie#1 does not stick to acrylic side of the mold</div>
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<div class="">Next step:</div>
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<div class="">mix RTV615 with Belle II mixing ratio 100:2.5 and test if the cookie stick to the acrylic, if it cures at 100C in the oven and if the cookie is softer. </div>
<div class="">Is the cookie is ok, test mechanical handling.</div>
<div class="">For degassing we plan to put the mixed components in the bell jar and not to put the mold filled with silicone.</div>
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<div class="">Please feel free to comment.</div>
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<div class="">Best regards,</div>
<div class="">Maria</div>
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<div class="">On Oct 12, 2016, at 6:19 PM, Maria Patsyuk <<a href="mailto:mpatsyuk@mit.edu" class="">mpatsyuk@mit.edu</a>> wrote:</div>
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Hi,
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<div class="">me and Jason started working on the cookies today.</div>
<div class="">Here I put some information about what we did, photos and plans:</div>
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<div class=""><a href="https://gluexdirc.mit.edu/day-1#" class="">https://gluexdirc.mit.edu/day-1#</a></div>
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<div class="">In short:</div>
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<div class="">today we prepared the working place for producing cookies and tried to mix the silicone (RTV615 - as first attempt, as this is not the target material, but has similar properties) using standard ratio 10:1 and degas it using vacuum jar. Silicone
mixture gets really foamy after careful mixing. Degassing apparently takes several hours, so we let the silicone liquid stand in the molds and in a glass until tomorrow.</div>
<div class="">Tomorrow we hope to get an idea about how good degassing worked and cure the cookies in the oven at 100C for an hour.</div>
<div class="">Then we plan to detach it from the mold and see if some release agents/foil is necessary to prevent silicone sticking to the mold.</div>
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<div class="">Please feel free to comment and recommend tests.</div>
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<div class="">Best regards,</div>
<div class="">Maria</div>
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