My progress II
- Dennis P Brown
- Posts: 3189
- Joined: Sun May 20, 2012 10:46 am
- Real name: Dennis Brown
Re: My progress II
Glad to hear about the lead shielding. There is no real need to concern yourself with neutron shielding. Maybe in the future but most fusors produce very safe levels of neutrons - even ones that can activate silver.
As some here know, I am not a fan of water shielding around high voltage (but that is just me.) Also, if a frame is metal, a good practice to ground it as well.
Be aware that legal issues vary in countries/schools relative to high voltage systems that produce x-rays for public display when running/active. Do consider your countries and schools rules on this issue.
Best of luck and do continue to post here.
As some here know, I am not a fan of water shielding around high voltage (but that is just me.) Also, if a frame is metal, a good practice to ground it as well.
Be aware that legal issues vary in countries/schools relative to high voltage systems that produce x-rays for public display when running/active. Do consider your countries and schools rules on this issue.
Best of luck and do continue to post here.
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- Joined: Sun Dec 30, 2012 3:39 am
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- Location: San Jose CA
Re: My progress II
Eduardo,
I didn't realize your age until I saw your pictures in your post on
Wed Jan 16, 2019
That makes your approach and accumulation of very good and selected parts even more impressive.
We seem to have two very young members doing very smart and good work at the same time. I have nothing specific to offer except to share that I am impressed and wish you both success in your diligent continued efforts.
I didn't realize your age until I saw your pictures in your post on
Wed Jan 16, 2019
That makes your approach and accumulation of very good and selected parts even more impressive.
We seem to have two very young members doing very smart and good work at the same time. I have nothing specific to offer except to share that I am impressed and wish you both success in your diligent continued efforts.
Rex Allers
- Eduardo_Machado
- Posts: 27
- Joined: Fri Aug 24, 2018 9:05 am
- Real name: Eduardo Machado
- Location: Sao Paulo - Brazil
Re: My progress II
Hello Mr. Brown,
Thank you for your advises. About the school presentation, I was thinking to use my fusor more like a display and show some videos about it, but I haven't set up this presentation yet.
Mr. Allers,
Thank you for your post. I am learning a lot about fusion and improving my english. I speak Portuguese and my father helps me to understand all the science and in building the fusor.
Regards,
Eduardo
Thank you for your advises. About the school presentation, I was thinking to use my fusor more like a display and show some videos about it, but I haven't set up this presentation yet.
Mr. Allers,
Thank you for your post. I am learning a lot about fusion and improving my english. I speak Portuguese and my father helps me to understand all the science and in building the fusor.
Regards,
Eduardo
-
- Posts: 39
- Joined: Fri Aug 24, 2018 9:03 am
- Real name: Cristiano Machado
- Location: São Paulo - Brazil
Re: My progress II
Hello all,
I am working with Eduardo on his fusor, and since the electrical part is more critical, I am responsible for it. After many troubles to get a HV power supply we finally got a solution, we will use the precipitator HVPS.
We will use the attached schematic to ground and measuring the fusor voltage and current. We used the FAQs a lot, but since many of them have problems with missing pictures, it is a little more difficult to evaluate if our grounding and measuring are correct. I would like to ask your suggestions and recommendations on the schematic bellow.
Thanks a lot.
Cristiano and Eduardo
I am working with Eduardo on his fusor, and since the electrical part is more critical, I am responsible for it. After many troubles to get a HV power supply we finally got a solution, we will use the precipitator HVPS.
We will use the attached schematic to ground and measuring the fusor voltage and current. We used the FAQs a lot, but since many of them have problems with missing pictures, it is a little more difficult to evaluate if our grounding and measuring are correct. I would like to ask your suggestions and recommendations on the schematic bellow.
Thanks a lot.
Cristiano and Eduardo
- Richard Hull
- Moderator
- Posts: 15028
- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: My progress II
Yes, the electrical wiring looks really good. I hope the precipitator works out good for you. This is the ideal hook up to monitor your system with as little complication as possible.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
- Mark Rowley
- Posts: 909
- Joined: Sun Dec 29, 2002 12:20 am
- Real name: Mark Rowley
- Location: Sacramento California
- Contact:
Re: My progress II
The precipitator supply has a current limiter circuit so the 68k ballast resistor may not be necessary.
Mark Rowley
Mark Rowley
- Eduardo_Machado
- Posts: 27
- Joined: Fri Aug 24, 2018 9:05 am
- Real name: Eduardo Machado
- Location: Sao Paulo - Brazil
Re: My progress II
Hello,
I would like to update you about my fusor project. I stoped to work on the fusor for a while, because I needed to focus in my studies. But now, here I am again.
Today we tested some parts of the system. We have put the system under low pressure (1x10-5 torr),and we have made some plasma (around 15 minutes and average 30 mtorr, 10.000 volts and 2mA).
Our next steps are:
-Test more the electric part;
-Make the lead protection;
-Connect the deuterium.
I am posting again some photos of my fusor and and of some new parts that we bought.
Pressure Control
General
Ballast and Voltage Divisor
High Voltage Power Supply
Control voltage amper ans pressure
Fore Pump
Turbo Pump
Grid
General View
I would like to update you about my fusor project. I stoped to work on the fusor for a while, because I needed to focus in my studies. But now, here I am again.
Today we tested some parts of the system. We have put the system under low pressure (1x10-5 torr),and we have made some plasma (around 15 minutes and average 30 mtorr, 10.000 volts and 2mA).
Our next steps are:
-Test more the electric part;
-Make the lead protection;
-Connect the deuterium.
I am posting again some photos of my fusor and and of some new parts that we bought.
Pressure Control
General
Ballast and Voltage Divisor
High Voltage Power Supply
Control voltage amper ans pressure
Fore Pump
Turbo Pump
Grid
General View
- Mark Rowley
- Posts: 909
- Joined: Sun Dec 29, 2002 12:20 am
- Real name: Mark Rowley
- Location: Sacramento California
- Contact:
Re: My progress II
Looking good!
Just a suggestion, pot the precip supply in oil and add more insulation to the HV feedthru. If you don’t want to make an oil socket for the feedthru, at the very least add some flashover protection and HV putty like Richard had suggested in other posts. It’s worked great for his system. Trust me, it’ll save you a ton of headache in the long run.
Mark Rowley.
Just a suggestion, pot the precip supply in oil and add more insulation to the HV feedthru. If you don’t want to make an oil socket for the feedthru, at the very least add some flashover protection and HV putty like Richard had suggested in other posts. It’s worked great for his system. Trust me, it’ll save you a ton of headache in the long run.
Mark Rowley.
- Eduardo_Machado
- Posts: 27
- Joined: Fri Aug 24, 2018 9:05 am
- Real name: Eduardo Machado
- Location: Sao Paulo - Brazil
Re: My progress II
Hello,
This is a video of plasma ignition using the high voltage power supply.
https://youtu.be/4UPfHryG9vw
This is a video of plasma ignition using the high voltage power supply.
https://youtu.be/4UPfHryG9vw
- Mark Rowley
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- Real name: Mark Rowley
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Re: My progress II
Just another thought after seeing the video... your grid design may limit ion recirculation to the openings of your “coiled tube“ grid design. Spherical or 360 degree recirculation patterns are probably best as they offer more pathways for D+D collisions/fusions.
Mark Rowley
Mark Rowley
- Eduardo_Machado
- Posts: 27
- Joined: Fri Aug 24, 2018 9:05 am
- Real name: Eduardo Machado
- Location: Sao Paulo - Brazil
Re: My progress II
Hello Mr. Rowley,
Thank you very much for your suggestions. I will work on flashover protection.
About the grid, this shape was easier for me to build, we used stainless steel wires and I couldn't make a good spherical grid. I will try again and see if I can get a different shape.
Regards,
Eduardo
Thank you very much for your suggestions. I will work on flashover protection.
About the grid, this shape was easier for me to build, we used stainless steel wires and I couldn't make a good spherical grid. I will try again and see if I can get a different shape.
Regards,
Eduardo
-
- Posts: 104
- Joined: Sun Feb 05, 2017 6:00 pm
- Real name: Pablo Llaguno
Re: My progress II
Hey,
Just an idea so you make your grid as Mark said
Take a look at this approach viewtopic.php?f=6&t=2484
Just an idea so you make your grid as Mark said
Take a look at this approach viewtopic.php?f=6&t=2484
- Mark Rowley
- Posts: 909
- Joined: Sun Dec 29, 2002 12:20 am
- Real name: Mark Rowley
- Location: Sacramento California
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Re: My progress II
Eduardo,
Scott Moroch made these excellent simulation videos which depict ion recirculation patterns. The first two videos show the efficiency of the classic spherical grid design. The third video gives an idea of the limitations with your axial grid design.
Spherical 1
https://www.youtube.com/watch?v=KhYKnPy1pz0
Spherical 2
https://youtu.be/JjcX1yIQllA
Axial 1
https://www.youtube.com/watch?v=P5lp3Wu_EkU
Mark Rowley
Scott Moroch made these excellent simulation videos which depict ion recirculation patterns. The first two videos show the efficiency of the classic spherical grid design. The third video gives an idea of the limitations with your axial grid design.
Spherical 1
https://www.youtube.com/watch?v=KhYKnPy1pz0
Spherical 2
https://youtu.be/JjcX1yIQllA
Axial 1
https://www.youtube.com/watch?v=P5lp3Wu_EkU
Mark Rowley
- Eduardo_Machado
- Posts: 27
- Joined: Fri Aug 24, 2018 9:05 am
- Real name: Eduardo Machado
- Location: Sao Paulo - Brazil
Re: My progress II
Hello,
These are the results of 19 october tests:
Time (minutes after plasma ignition)--Pressure (militorr)--Volts (V)--Ampers (mA)
2:10--10--8700--0.2
3:00--8--9000--0.1
4:20--9--8500--0.3
5:00--8--12000--0.4
6:00--7--13000--0.2
7:00--16--6500--3.1
8:00--14--9000--3.8
9:00--12--10000--3.1
10:30--10--13000--2.3
12:00--9--16000--1.5
And two youtube videos. Sorry, but they are in Portuguese.
https://youtu.be/ezo6oZoqhh8
https://youtu.be/ZYjFilj12SY
These are the results of 19 october tests:
Time (minutes after plasma ignition)--Pressure (militorr)--Volts (V)--Ampers (mA)
2:10--10--8700--0.2
3:00--8--9000--0.1
4:20--9--8500--0.3
5:00--8--12000--0.4
6:00--7--13000--0.2
7:00--16--6500--3.1
8:00--14--9000--3.8
9:00--12--10000--3.1
10:30--10--13000--2.3
12:00--9--16000--1.5
And two youtube videos. Sorry, but they are in Portuguese.
https://youtu.be/ezo6oZoqhh8
https://youtu.be/ZYjFilj12SY
- Mark Rowley
- Posts: 909
- Joined: Sun Dec 29, 2002 12:20 am
- Real name: Mark Rowley
- Location: Sacramento California
- Contact:
Re: My progress II
For a 2.75" system using a 30kV precipitator supply, those numbers seem about right for an air plasma. When you switch over to deuterium all those numbers will change.
Mark Rowley
Mark Rowley
- Richard Hull
- Moderator
- Posts: 15028
- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: My progress II
Mark is correct and you are doing this correctly. With a great demo system that you have you are gaining valuable "operational experience" and I am glad you are doing it with air. In the beginning, back in October of 1997, I spent 1 full year with fusor I and fusor II. I read books on ionized gases, vacuum systems and fusion during this time as well. When it came time to do fusion I was 100% prepared, although there was still a small learning curve as I did fusion in Feb. 1999. I had no real group to look to for help as there was no fusor.net. I was on my own. I first did fusion in Fusor III. I stayed with the lower performing fusor III for 3.5 years as I worked hard on neutron detection systems and went through 3 different detection schemes and used up my first small 25liter bottle of deuterium due to not having a secondary diffusion or turbo pump. I learned after fusor II that any real fusor system is doomed to be a large sprawl of many interconnected pieces of gear and gave up on the idea of a closed box containing a real fusor system.
Keep up the advancing effort which, thus far, is exemplary.
I attach images of all of those 3 early systems spanning 5 years before the advent of Fusor IV. Each image is labeled and explained.
Richard Hull
Keep up the advancing effort which, thus far, is exemplary.
I attach images of all of those 3 early systems spanning 5 years before the advent of Fusor IV. Each image is labeled and explained.
Richard Hull
- Attachments
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment