I didn't blame Siemens for not wanting to work with beryllium. You need to be set up for that kind of thing -- very expensive. The workers would not have liked it either.
Yes indeed, you should immediately go out and buy a Pentax Fartist D and send me the old K-1000 -- I could use it here. By the way I had two 180s in South Africa and we did quite a lot of work on detectors. In fact Cambridge started making them to my design especially one (about 25mm diameter) for transmission which was very useful indeed. I had a couple of Siemens instruments too. One of the only three ever sold of the ST-100F and a CT-150 as well, not to mention a 102 workhorse that was the most reliable of them all. There was an EDX (Link) on one of the Cambridges and it worked very well. Now of course one can do all that stuff with a PC based analytical arrangement at 1/50 of the cost of the old systems. We made stage parts out of Dural, by the way and I have no idea what the actual designation was. All I know is that is was very hard and excellent under vacuum. The parts could be machined to very close limits. Don _______________ Dr E D F Williams http://personal.inet.fi/cool/don.williams Author's Web Site and Photo Gallery Updated: March 30, 2002 ----- Original Message ----- From: "Th. Stach" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, June 10, 2003 6:57 PM Subject: Re: No so way off topic Re: *ist D revisited/Al alloys > Dr E D F Williams schrieb: > > > > Yes the specimen holder and other parts of the specimen itself. Even the > > polepiece which was very close. I fashioned a shield (very complicated > > shape) of graphite, intending that it should serve as a model for making one > > of beryllium. But in the end decided it was far to dangerous an undertaking. > > I refined the carbon shield and it helped, up to a point, which we never > > passed. I even tried to get Siemens to make the shield, but they baulked at > > the idea as well. > > Hehe, > manufacturer support... can sometimes be a real pain. > I'm just having trouble with Le*c* microsystems... but N*k*n is even > worse, here. > > To get this on topic again: > I've got an old K-1000 body attached to my electron microscope (Camscan > CS4 SEM with EDX & WDX). > Would it be a wise idea to replace this with an *ist-D ? > :-) > > > Thomas >
