Search found 283 matches

by Dan Knapp
Tue Jul 07, 2020 12:53 pm
Forum: Images du Jour
Topic: Research facility construction
Replies: 47
Views: 3557

Re: Research facility construction

In reference to Richard’s post regarding a separate building for woodworking, I wanted to mention that it is possible to have a woodworking shop and a machine shop coexist with a good dust collection system. My shop is a two car garage space with machine shop on one side and woodworking on the other...
by Dan Knapp
Wed Jul 01, 2020 3:07 am
Forum: Vacuum Technology (& FAQs)
Topic: Edwards Pirani Gauge + Controller
Replies: 1
Views: 3958

Re: Edwards Pirani Gauge + Controller

Read the rules for joining the forum.
by Dan Knapp
Mon Jun 15, 2020 1:16 pm
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20894

Re: Coronavirus pandemic

The solution to the testing problem is to use pooled testing in the form of monitoring virus RNA levels in sewage. This is being done increasingly across the country and internationally, but it needs to be a nationally coordinated effort. A group at the University of Utah recently demonstrated predi...
by Dan Knapp
Sat Jun 13, 2020 11:19 am
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20894

Re: Coronavirus pandemic

Am I hearing this correctly? Some are arguing that a for profit company is throwing away money by reusing a booster rocket just so the young people can claim they did better than the old people? Is there no wonder we are regarded as crotchety old farts?
by Dan Knapp
Thu Jun 11, 2020 2:40 am
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20894

Re: Coronavirus pandemic

Death numbers are problematic also. It is generally accepted that COVID-19 associated deaths are being undercounted. Total deaths are way up over normally expected numbers, with the increase being much greater than the total deaths attributed to COVID. It is going to get even more difficult as case ...
by Dan Knapp
Tue May 26, 2020 12:07 pm
Forum: Images du Jour
Topic: Research facility construction
Replies: 47
Views: 3557

Re: Research facility construction

Is that a fire truck in the photo?
by Dan Knapp
Mon May 25, 2020 11:49 am
Forum: Images du Jour
Topic: Research facility construction
Replies: 47
Views: 3557

Re: Research facility construction

One other suggestion if you live anywhere near water, be mindful of the floor elevation. A little fill dirt can save much hassle later. When I built my lab building, we hadn’t seen a hurricane in twenty years. I put the foundation slab at grade level, and now I find myself sandbagging every year. An...
by Dan Knapp
Sun May 24, 2020 6:25 pm
Forum: Images du Jour
Topic: Research facility construction
Replies: 47
Views: 3557

Re: Research facility construction

If you decide to condition your space, I highly recommend the Mitsubishi ductless heat pumps. They are super efficient (SEER up to 26 available). You can buy them online precharged with freon for easy installation. Be careful not to oversize the unit; they are so efficient that they don't stay on lo...
by Dan Knapp
Mon May 04, 2020 4:35 pm
Forum: Announcements and Site Administration Topics
Topic: Nuclear Fusion textbook sale
Replies: 1
Views: 449

Nuclear Fusion textbook sale

Springer is running a sale on selected textbooks which includes Edward Morse's 2018 text Nuclear Fusion. You can buy a paperback copy for $14.99 where the hardback normally sells for $110.00. https://www.springer.com/us/book/9783319981703?mkt-key=42010A0557EB1EDA9CFB4CEAC74BA8E9&sap-outbound-id=147D...
by Dan Knapp
Thu Apr 30, 2020 7:23 pm
Forum: Books & References
Topic: Penning trap
Replies: 3
Views: 585

Re: Penning trap

My two pennings worth: It doesn't look like the classic hyperbolic electrode Penning trap is a viable approach to a fusion reactor. The required potentials are too high to avoid breakdown between the closely spaced electrodes. This is another example of something that looks very promising in a compu...