how to build a better electron accelerator/collimator?

Discuss the technical details of an "open source" community-driven design of a polywell reactor.

Moderators: tonybarry, MSimon

[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable
happyjack27
Posts: 1435
Joined: Wed Jul 14, 2010 5:27 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

how to build a better electron accelerator/collimator?

Postby happyjack27 » Thu Jun 02, 2016 3:08 pm

if i'm thinking through the physics right - and correct me if i'm not -- whether or not an electron at a given cylindrical coordinate z,r,theta outside the magrid makes it into a magrid of a given charge and current, is completely dependent on the "angle" of its velocity; the ratio of the z-component of its velocity to the r-component. (higher dz/dr is better)

now there are only 2 ways to change this ratio: decrease dr or increase dz.

the former would be a collimator, the latter an accelerator.

so... how to construct?...

bearing in mind energy efficiency is important. if it gets twice as many electrons in, but that takes four times the energy, well that's useless.

(the other 2 control parameters are initial r and initial z. obviously the lower the better, for either of them, but i'm separating the two problems here: initial position vs initial velocity)

KitemanSA
Posts: 6114
Joined: Sun Sep 28, 2008 3:05 pm
Location: OlyPen WA
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: how to build a better electron accelerator/collimator?

Postby KitemanSA » Thu Jun 02, 2016 10:33 pm

The other way would be to have X-cusps at the confluence of the paired fields. An X-Cusp has no field (a funny cusp) at the very center so electrons can leave and enter with ease, but the magnet cans (which are NOT there) are still well shielded.

DeltaV
Posts: 2245
Joined: Mon Oct 12, 2009 5:05 am
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: how to build a better electron accelerator/collimator?

Postby DeltaV » Fri Jun 03, 2016 5:24 pm


happyjack27
Posts: 1435
Joined: Wed Jul 14, 2010 5:27 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: how to build a better electron accelerator/collimator?

Postby happyjack27 » Sun Jun 05, 2016 7:16 pm


DeltaV
Posts: 2245
Joined: Mon Oct 12, 2009 5:05 am
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: how to build a better electron accelerator/collimator?

Postby DeltaV » Mon Jun 06, 2016 1:57 am

Could be, I don't know. Just posting it as a possible option.


[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Return to “Design”

Who is online

Users browsing this forum: Bing [Bot] and 2 guests