Hi Y'All! Newby here. I attempting to put together a Vacuum System using a junk box full of various Vacuum parts. I have two ISO-100 Flanges that I want to...
... I had to do a (very) little research and discovered: "This is one big scam! It has nothing to do with google search! Their site is very misleading. For...
Hi Tom, You are on a right track! Look at http://mdcvacuum.com/DisplayContentPage.aspx?d=MDC&cc=68155a96-2f81-4a65-907e-a7e409b179ed, and you'll see how...
You can aliminizr lots of plastics quite easily. The harder question is, can you cast it as an accurate paraboloid first? Guy ... You can aliminizr lots of...
Just finished machining a 6061 Aluminum Baseplate for my Bell Jar. It's 14" in diameter by 1" Thick with a 4" hole in the center and drilled for a Conflat....
I suggest not using your plasma discharge cleaner system ( if you have one ) as out gassing of plasticizer from the plastic may form soot if exposed to plasma....
I have had success using a rubber gasket under my bell jar. I coat the mating surfaces with a light coat of vacuum grease. I have also used soft wax (from a...
Okay, I have been having trouble achieving a suitable vacuum. Today i replaced the o-ring seal on my diffusion pump. While I had it out I found the nameplate...
oops, Still had a problem where it wouldn't pump below 100 microns. Upon examination I found that air was trapped in the high current feed throughs (yes both...
... As I said on to coat mirrors. I just uploaded a photo of the setup in my bell jar. The mirrors have a small radius and would not coat on the edges. That...
A friend of mine suggested Alconox as a new cleaning agent for use on mirrors prior to aluminization. I have tried it and found that it seems to work many,...
... I second this recommendation. I've used Alconox for years to clean lab glassware and related items. It's good stuff. -Dave -- Dave McGuire, AK4HZ New...
Hello! I need to recoat two small mirror. One of them is 15mm diam and maybe 20gramm, the other is 24mmx36mm also very light. I have no idea how can I put the...
Attila, I would be concerned that outgassing from the tape would contaminate your plating. You may well end up with a very large virtual leak. I would suggest...
I would use two parallel bars of steel or aluminum that you connect with long bots nuts and washers. The mirrors go between them, sideways of course. Guy ... I...
Hi Attila, We always use double sided Kapton tape to hold small parts if there are some troubles with rails or to protect pre-coated sides if necessary. It ...
Hello, Does anybody have the ability to calculate the TIO2 thin film layer thickness and refractive index, form spectrometer measurement datas? I attached a...
Hi Attila, Actually you have two unknown parameters - film thickness and refractive index dispersion, so it is not easy to find thickness exactly just from R...
Hi Vladimir, Here are the datas I have: The deposition rate was 2 Angström/sec, I deposited 150nm of TIO2 at least the quartz monitor showed that. That was an...
Was wondering what an acceptable thickness - in steel- would be for a square welded chamber 22 inches in diameter? !/2 inch steel sound OK?? This is to coat...
Square chamber with diameter????? Well, anyway, if it is cylindrical chamber 1/2" SS should be OK. If it is square/cube chamber, 1/2" also should be OK but I...
You can go thinner if you stitch weld some vertical supports across the flats. say 1/4" wall with 1/4" thk x 1" wide support ribs perpendicular to he flat...
Hoop stress varies dramatically with diameter, so your thickness will depend in large part on the size of your chamber. This page may be informative: ...
