Accelerator Fusion-Discussion-The reflex ion gun collider

[3l]

Hi Folks:

Warning: The following post contains procedures that should not be attempted with out a thorough and COMPLETE understanding of the radiation hazard involved.
High vacuum is required to make this method work.
Remote operation procedure HAVE to be in place from the beginning.
Appropriated warning signs with a flashing warning light are necessary.
High voltage safety will be stringent due to the extra high potentials involved.
The radiation is short range but very intense close to the linac /reflex gun and the experintal area
Proper safety interlocks with keys are a must.
The local radiation will be on the order of 100 Rads or above.
It exceeds the lifetime permissible dose many fold.


Has anybody built a reflex ion gun yet?
Now that conflat is going together really well, I thought a special project was in order.
Hear's my crazy a** desire.
I want to build a Cooper reflex ion gun in 2 3/4 conflats.
What?
Yes you heard me!
I really liked the reflex gun when I first saw the simulations
but had no way to support the UHV required.
That has changed, Very high vacuum in the diffusion pump system with all conflat fittings made me dust off this device.
I'm assuming 10^-6 torr
Dave ,I know it's been a looong time but can I get some input on this?

This is the relavent post: in
Ion Gun Design and Construction Forum

The root post was:
2003-21-01 13:37 To Focus or not to focus - the next generation (Phil Fostini) [Latest: ] (25)

goto this post:
2003-23-01 03:45 Re: To Focus or not to focus - the next generation (Dave Cooper)
( A classic example of an unsearchable topic.. I reposted it in this forum so folks could see it)

I started out to build Richard's (Hull) linear collider but material problems on the center electrode shot that project....like how to make it last.

The relavent post:in

Fusor Construction & Operation Forum
2003-01-23 14:10 Linear Collider (Richard Hull) [Latest: ] (12)

Phil (Fostinni) had sent me his prototype gun.
To build Richard's device would have meant building a chinese copy of Phil's gun.
However I remember reading Dave's simulation years ago
(see it pays to read this stuff..ya never know).
So I changed to the reflex deuteron gun.
Colliders of all kinds would be really neat in hybrid systems.
But for reliablity and simplicity none beat the reflex ion gun.

Happy Fusoring!
Larry Leins
Fusor Tech

[paulriley]

I cannot find the thread to focus or not focus by David Cooper. anyone got the URL?
Thanks
Paul

[3l]

Hi Paul:

It's in the forum in the
Ion Gun Design and Construction Forum
The root post was:
2003-21-01 13:37 To Focus or not to focus - the next generation (Phil Fostini) [Latest: ] (25)
It is a lot easier to implement that a spherical device.

Happy Fusoring!
Larry Leins
Fusor Tech

[DaveC]

I don't always get down to this forum, Larry. My apologies.

What sort of input would you like on the "reflex fusor" ?

I have not yet tried to build it, either, but as an electron device, it is very simple. As an ion device, a little more work on the ion source is required.

Dave Cooper

[3l]

Hi Dave :

Your present simulation is for a collisional energy of 20 kv right?
How about running it at 30 kv for a total collisional of 60 kv.
That would raise the collisional crossection a bunch.
It is the about the highest voltage you could squeeze into 2 3/4 conflats safely.
Phil has provided me with a simple ion gun that will do the job I think. It's all 2 3/4 conflated ion gun.

Happy Fuisoring!
Larry Leins
Fusor Tech

[DaveC]

Larry - Again ... haven't visited this forum for a couple weeks. I can do some more runs, in the near future. Just got thru some computer upgrades and need to reinstall that software. Please standby... will try to get something run in the next week.

There are some important considerations to observe with the trajectory simulations, I will include those with the next post.

Dave Cooper

[3l]

Hi Dave:

Thank you.

The electrode placement was a little worrysome but I think I've got the solution.

Happy Fusoring!
Larry Leins
Fusor Tech

[3l]

Hi folks:

After much machining ,tig welding, cussing and just plain too many visitors.
The ion reflux device is assembled ready to run.
The control electronics are behind as usual but the excitement is building in my craggy head.
This device pushed ahead of the sphearical fusor due to leaky gauge connections !@#$%
At least this time,neutron counts will be smoother and more accurate.

Happy Fusoring!
Larry Leins
Fusor Tech

[Alex Aitken]

Just a technical point, the 'collisional energy' for two 30kev deuterons colliding head on is 120kev, not 60kev.

[3l]

Hi Marvin:

If you use the com centered system...the energy each particle has is the number particles in the nucleus divided into the kinetic energy.
So each piece of the deuteron has only 15 kev for each particle.
So the collisional energy for the four particles is 60 kev total.

Happy Fusoring!
Larry Leins
Fusor Tech

[Alex Aitken]

I cant dissagree there and the C.O.M. system is more suited to working out how much power the accelerator is using in your linear symmetrical case, but if you want to compair results to published cross section data you will need to convert to the target centered system used by conventional nuclear physics.

Using two seperate systems at the same time could get very confusing.

[3l]

Hi Marvin:

I was raised by an Iranian Nuclear Physics guy.
The British did a lot of the crossections...Humm..
By the time I knew there was a difference I was in Advanced Nuclear and Atomic #3.
It took Palestenian born Dr. Ghurtma to tell me
You are the first person to even notice.
I tend to assume the lower energies because of my engineering predjudice.
Plus If I get lack luster action it won't smart as much.

Happy Fusoring!
Larry Leins
Fusor Tech