Optical Cryostat (Janis ST-100) - Revision history

Nbrewer at 15:41, 22 July 2014

2014-07-22T15:41:07Z

← Older revision		Revision as of 15:41, 22 July 2014
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	* The ST-100 should not be baked out because the window block and electrical feedthroughs are sealed using epoxy and baking out the cryostat might cause the epoxy to melt.		* The ST-100 should not be baked out because the window block and electrical feedthroughs are sealed using epoxy and baking out the cryostat might cause the epoxy to melt.

			* What we've seen is that at room temperature while continuously pumping with the [[Turbo Pump Station (HiCube 80 Eco)\|Pfeiffer turbo pump]] the pressure is pretty constant around 5.6<math>10^{-5}</math> mbar (~4.2<math>10^{-5}</math> Torr). While the cryostat is held around 5 K and continuously pumped down, the pressure gets as low as 4<math>10^{-8}</math> mbar (~3<math>10^{-8}</math> Torr).

2014-07-11T16:04:35Z

← Older revision		Revision as of 16:04, 11 July 2014
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	[https://wiki.physics.wisc.edu/yavuz/images/c/c3/ST-100_Drawing.pdf Technical Drawing]		[https://wiki.physics.wisc.edu/yavuz/images/c/c3/ST-100_Drawing.pdf Technical Drawing]


			==Notes==

			Here are some random useful pieces of information to know gathered mostly from emails with Dan Logan from Janis:

			* The ST-100 is designed to hold and operate at <math>10^{-4}</math> Torr and the seals should hold this pressure for "several hours if not several days".
			::It seems like this is not the case.

			* With continuous evacuation with a turbo pump the pressure should be able to reach <math>10^{-5}</math> or <math>10^{-6}</math> Torr, the ladish gaskets on the cryostat aren't able to hold this high of a vacuum without the pump on though.

			* The performance of the cryostat will be better but the pressures as low as <math>10^{-3}</math> Torr can be acceptable.

			* The ST-100 should not be baked out because the window block and electrical feedthroughs are sealed using epoxy and baking out the cryostat might cause the epoxy to melt.

2014-07-11T15:29:52Z

← Older revision		Revision as of 15:29, 11 July 2014
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	There is a hard copy of the manual in the lab.		There is a hard copy of the manual in the lab.

	[[ST-100_Drawing.~~gif\|~~Technical Drawing]]		[https://wiki.physics.wisc.edu/yavuz/images/c/c3/ST-100_Drawing.pdf Technical Drawing]

2014-07-11T15:19:24Z

Created page with "thumb|400px| ==Files== There is a hard copy of the manual in the lab. Technical Drawing"

New page

[[File:ST-100.JPG|thumb|400px|]]

==Files==
There is a hard copy of the manual in the lab.

[[ST-100_Drawing.gif|Technical Drawing]]