June 15, 2015 05:13:40
June 27, 2015 15:36:03
June 30, 2015 00:43:38
July 1, 2015 06:59:00
July 1, 2015 06:59:00
July 1, 2015 06:59:00
July 15, 2015 02:21:52
July 21, 2015 05:39:59
Robert Deliën I just LOVED this video, Ben! I've been looking for a Stirling-cycle cryocooler on eBay since Jeri's video, but was unable to find one for a reasonable price. There's one on eBay now for $1500, but it's 12 years old and untested. How did you get the controller software? Keep up the good work!
July 25, 2015 17:33:35 · Reply
Applied Science Thanks! It's true that the STI Superfilters have gone up in price -- perhaps because of my blog post talking about the cryocooler within each unit. When I built my LN2 generator in 2008, the eBay price for the Superfilter was about $300. I got the software by calling STI and asking for it, but I didn't disclose the fact that I was a hobbyist.
July 25, 2015 17:50:52 · Reply
Jean-Francois Perreault Do you think it would possible for you to do a teardown of the cryocooler head ? Maybe including some measurements of critical parts ? There are quite a few DIY machinists on youtube and it might be possible to have the community make simplified cryocooler heads at a low cost ? Having LN2 on hand can be a great asset, especially if you generate your own it's probably cheaper than keeping dry ice in stock.
July 27, 2015 06:52:09 · Reply
Applied Science Jean-Francois, the cryocoooler is a sealed (welded) stainless steel unit, so a teardown would mean it will probably never function again. The teardown is not out of the question, but kind of a shame to destroy one, knowing how rare they are. The Stirling-cycle cryocoolers have some good technical documents and drawings on the web. This diagram is pretty detailed: http://www.ipaustralia.com.au/applicant/superconductor-technologies-inc/patents/AU2001274812/ Back when I was building the LN2 generator, I found other documents describing Stirling-cycle coolers, but don't have them saved anywhere. Let me know if you want me to take a look again.
July 27, 2015 07:01:49 · Reply
July 25, 2015 18:32:58
July 27, 2015 03:55:47
Mark Beeunas Hi Ben: In your research you have seen reference to the 'magneto-optic Kerr effect' and its application for a Kerr Microscope, looks interesting, 'probably non-trivial'. Also, an ad hoc idea: A cursory review indicates there is a spectral component to the magneto-optic effect so with the right optical material maybe a frequency tunable wave cell could be constructed (likely several stages). Again, very ad hoc, it would also seem this effect would be more crisp at lower temperatures (i.e. less thermal giggling/spread). But, maybe the distributions for all of optical sections are inherently to broad to resolve anything useful. Cheers Mark Beeunas
August 4, 2015 05:15:16 · Reply
Marc-Andre Ferland In the video, you said that water is not a liquid crystal. But it is... Source: Dr. Gerald Pollack, University of Washington, Professor of Bioengineering, 32nd Annual Faculty Lecture, https://youtu.be/XVBEwn6iWOo I'm not sure if that could change anything about this video ? Could that also be a reason as to why the light intensity changes ?? Also, i would be interested to know your opinion on Dr. Pollack presentation and his testing methodology. Edit: In the presentation Dr. Pollack shows that the exclusion zone created by the organized structure of water will show on a Polarization micrograph and that it will have an effect on the alignment/polarisation of light, but he does not go that much in detail about light polarisation..... A more recent talk by Dr. Gerald Pollack, it give information about newer experiments done since and also gives more information about the impact of the organized water on other fields of science. Part 1 https://www.youtube.com/watch?v=JnGCMQ8TJ_g Part 2 https://www.youtube.com/watch?v=hqHWueBp23c
August 5, 2015 02:26:12 · Reply
August 1, 2015 06:59:00
August 1, 2015 06:59:00
August 1, 2015 06:59:00
August 10, 2015 08:40:38
August 16, 2015 22:12:27
August 29, 2015 16:38:26
jason black I've also seen people light thermite with a household match. The trick is to put a pinch of sulfur powder on top of the thermite. Not sure I'd want to light thermite with my hand that close to it, but there you go. Here's an example vid: https://www.youtube.com/watch?v=LAmRtO6XOGk
August 29, 2015 18:24:38 · Reply
August 31, 2015 07:01:51
Simon Gustav Håkansson Could you post a gif of the drill bit animation?
August 31, 2015 18:53:17 · Reply
September 1, 2015 06:59:00
September 1, 2015 06:59:00
September 1, 2015 06:59:00
Myleah Rydberg I love you guys. Thanks for the amazing work you do.
October 1, 2015 07:10:56 · Reply
September 20, 2015 00:54:21
September 28, 2015 01:00:51
October 1, 2015 06:59:00
October 1, 2015 06:59:00
October 1, 2015 06:59:00
View all 6 comments
Tom Noticed you had a few other storage devices in your menagerie there Ben... fodder for future videos or just not interesting to look at under the scope?
June 16, 2015 04:47:37 · Reply
Applied Science Yes, those other media types will be in future videos. Search for "magneto optical" for a preview.
July 7, 2015 05:48:50 · Reply
Markus Ålind This was a superb video! Very interesting and well done. Finally pushed med to create this patreon account.
June 16, 2015 19:00:36 · Reply
Applied Science Thank you!
July 7, 2015 05:48:16 · Reply
Nils Winnwa What glue (That black stuff on the brush) did you use to glue the records on those tiny cylinders? Thank you for answering :)
July 5, 2015 09:33:12 · Reply
Applied Science It is conductive carbon glue. I bought mine from an electron microscopy supply store (http://www.emsdiasum.com/microscopy/products/sem/colloidal.aspx) but you can also get conductive epoxy or repair kits for automotive rear window defrosters that work similarly.
July 7, 2015 05:53:24 · Reply