Search found 176 matches

by Maciek Szymanski
Mon Jul 19, 2021 9:59 am
Forum: Images du Jour
Topic: Sean Soleyman's Fusor
Replies: 2
Views: 334

Re: Sean Soleyman's Fusor

Could yo post some details regarding the power supply construction?
by Maciek Szymanski
Sun Jun 27, 2021 6:36 pm
Forum: Please Introduce Yourself
Topic: First Demo build... something isn't quite right.
Replies: 7
Views: 205

Re: First Demo build... something isn't quite right.

For this kind of leak you can easily do without any gauge, just by looking at the plasma. Here you are a very useful illustrated reference: https://fusor.net/board/viewtopic.php?f=24&t=2795 If you use a flat electrode instead of the grid you can even determine the pressure by the width of the farada...
by Maciek Szymanski
Sun Jun 27, 2021 6:21 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 20
Views: 7706

Re: Track detectors

The work was quite delayed, but finally I was able to assemble seven fast neutron dosimeters based on CR-39 track detector. 176761CC-665F-48D0-9E15-3B6CBE702915.jpeg Dosimeter components. 1. Front plate stamped with the detector number and three 6 mm apertures (2 mm aluminum). 2. Polyethylene radiat...
by Maciek Szymanski
Sat May 22, 2021 4:46 pm
Forum: Images du Jour
Topic: Chris's Shennanigans
Replies: 9
Views: 4411

Re: Chris's Shennanigans

Yes the 1:1 wax is good down to 1e-6 Torr and very easy to work. I like especially that it can be wiped clean form the disassembled parts after heating with the SMD hot air blower.
by Maciek Szymanski
Sat May 22, 2021 4:28 pm
Forum: Images du Jour
Topic: Chris's Shennanigans
Replies: 9
Views: 4411

Re: Chris's Shennanigans

This iron oxide read color and copper tubing gives a beautiful vintage look. I'm very interested in the results. I'm using the wax-rosin 1:1 in many applications, but the 40ºC melting point is sometimes no-go. If the Faraday Wax can hold up to some 70-80ºC that may become my new favorite!
by Maciek Szymanski
Sat May 22, 2021 4:20 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 20
Views: 7706

Re: Track detectors

Ok, so I'm ordering the aluminum flat bar and 2mm PE sheet. I should have the dosimeters ready for dispatch at the end of the next week. In the meantime I've got some data regarding the "dead counts" of the CR-39. The four pieces of 10 years old CR-39 sheet were exposed for the alpha particles form ...
by Maciek Szymanski
Fri May 21, 2021 8:36 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 20
Views: 7706

Re: Track detectors

Here is a quick design of the neutron detector: BDFBC352-35D8-4B7B-995D-758CA6760106.jpeg The detector should be placed as close as possible to the fusor to increase the count number. It would be nice if one would be positioned at the viewport, to see if the increased x-ray exposure will make any di...
by Maciek Szymanski
Fri May 21, 2021 7:41 pm
Forum: Vacuum Technology (& FAQs)
Topic: New Turbomolecular Vacuum System - EXT75iDX
Replies: 10
Views: 3557

Re: New Turbomolecular Vacuum System - EXT75iDX

For me the easiest way to think on the effect of the restrictions in the high vacuum system is the "hole to the perfect vacuum system". Just consider the turbo or diff pump as the perfect vacuum space of unlimited size. The pumped volume is connected to this space through some conductance. The pumpi...
by Maciek Szymanski
Mon May 17, 2021 8:34 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 20
Views: 7706

Re: Track detectors

Regarding Lexan as the track detector. According to Solid State Nuclear Track Detection:Theory and Application by A. M. Bhagwat energy wise the detection threshold of Lexan is 80 times higher than for CR-39: D410388A-F5B6-44AB-B87F-0153A8AD483E.jpeg It is also worth noting that the cellulose nitrate...
by Maciek Szymanski
Mon May 17, 2021 8:03 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 20
Views: 7706

Re: Track detectors

Great! My plan is to use two sets of three dosimeters irradiated in two sessions plus a reference one which will be not exposed, but otherwise identical and sent together with the rest both ways to compensate for factors like cosmic rays in the airplane, xray inspection and overall history of the CR...

Go to advanced search