Is Building a Homemade Particle Accelerator Worth the Risk?

In summary: VDG itself must be designed with a purpose. c) No protruding screws, bolts, etc. d) Magnetically attached to the VDG12) The containment chamber 13) The diff pump (will use a centrifugal pump) 14) The VDG electronics 15) The VDG power supply 16) The drift tube power supply17) The target chamber power supply 18) The window (or acrylic cover)19) The camera20) The video recorder21) The backup power supply22) The control panelIn summary, Mark has been doing a lot of reading
  • #1
Atomic Parts
9
0
The attached photo and youtube link is my current progress regarding the engineering and building of the 1971 Scientific American plans of a particle accelerator. My design will differ in several ways specific to vacuum tube, drift tube and equipotential ring design. However, the basic concept of a VDG driven cascade tube is still the primary design.

Already, since the photographs and video were made, I have changed the design in several ways. Once all the engineering gremlins have been worked out, I will use the pictured model as a template for a final "working" version.






Mark
 

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  • #2
Looks like you are serious about building a machine, and have done a lot of reading on the subject. Do you plan to accelerate electrons or ions(protons)? What is the vacuum you think you need? What is your DC terminal voltage? What is the spacing of your drift tubes, and how did you determine it? Do you plan to apply ac voltage to your drift tubes? What do you consider to be successful completion of the project?
 
  • #3
Hi,

Looks like an interesting project. Are the books displayed at the end of your project worth a read for a beginner. Could you suggest a book that would explain what happens with a particle accelerator?
 
  • #4
Hi Bob,
I will answer you questions in the order asked.
1) I plan on accelerating protons.

2) Vacuum will be in the realm of 10e-7 torr. Shouldnt be a problem with the diff pump and some conflats.

3)The VDG will be a 750kv model with a 22" dome.

4) The drift tube spacing is 3/4". This was the original specs in the 1971 article. Being a proven design, I decided not to tamper with it. However, my alterations of the 1971 design includes a modular and easy to disassemble system. That alteration is not pictured in the above jpg and youtube video. The drift tubes will be connected with 1" dia 3" long pyrex (heavy walled) tubing. (I call them spacer units). The drift tube assembly will slide into the containment tube which is 2" in diameter. Later, if I decide to alter the drift tube spacing, all I will have to do is make longer or shorter spacer units. But, I am fairly confident the 3/4" spacing will be adequate. Any adjustments in that arena can probably be done by voltage and equipotential ring tuning.

5)No. AC voltage to the drift tubes would convert this into a (HF) LINAC; providing each tube is sequentially bigger. My project is purely a DC assembly. Just like the early VDG and Cockroft Walton accelerators of the 1930s.

6) Neutron production.

I should add that this is a VERY long term project. I am predicting completion of the tube in August. Then there is the ion gun design, the VDG unit, vacuum system, gas handling system, pre-ionizer, etc, etc, etc... Family and day-job responsibilties will always come first with the usual expected delays in hobby projects.
 
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  • #5
Regarding the books. All are good for beginners except Bruno Rossi's High-Energy Particles. That one is fairly complex theory with a lot of math.

However, the best one I know of for beginners is ACCELERATORS: MACHINES OF NUCLEAR PHYSICS By Robert R. Wilson. This publication is widely available at a very cheap price (usually $2 to $5).

Check out this link:

https://www.amazon.com/dp/ACCELERATO/?tag=pfamazon01-20
 
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  • #6
Attached is a youtube update (part 2) on the Accelerator tube. At this time I am working on the ION Gun. That will be my next youtube installment (part 3).



Mark
 
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  • #7
You seem to have done everything except the safety consideration. Have you ever considered the amount of radiation you get out of this, both prompt and residual? Proton impact on almost any material at that energy can induce residual radiation that can linger for quite a while.

Is this done in a proper lab with a controlled shielding, etc.? Do you know if you will be in violation of safety laws?

Zz.
 
  • #8
"You seem to have done everything except the safety consideration."

Ha! I wish you were right. Actually this is just the very early stages of the beginning. I am not even close to the middle yet. Just a quick list of things to do include (but not limited to):

1) Ion Gun design
2) Ion Gun prototype and testing
3) Ion Gun build
4) Target design
5) Target build
6) Vacuum system design
7) Diffusion pump to target chamber connection assembly.
8) Gas handling system / valving (this one is very tricky due to leaks)
9) Power supply system for the Ion Gun (must be small enough to fit in the VDG dome)
a) Pre Ionizer
b) Filament power (battery)
c) Nylon line control system
10) The VDG itself
11) The VDG Sphere
a) Must be designed to be as seamless as possible (flangeless IKEA Blanda Blanks)
b) Pressed out hole for the tube. Must be rounded. Special dies must be made to
achieve this.
12) Overall wiring system.
13) Remote control system
14) Video monitoring system

So, as you can see I may be a full year away from any preliminary function test of this project.

Regarding safety, the system is located in a detached building and is designed to be operated via remote control and monitored via video.

"Do you know if you will be in violation of safety laws?"

No more than if I was operating a Fusor. Same stuff. Go here and search the forum on laws and regulations regarding items such as this.

http://www.fusor.net/board/index.php?site=fusor&bn=

Mark
 
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  • #9
Er.. I work at a particle accelerator, and am quite familiar with the OFFICIAL (not the public forum version) safety regulations, and in many cases, there are site specific, both local govt. and state govt. regulations that could be in addition to the federal regulations.

If you are not that concerned about it, then there's no reason why I should.

Zz.
 
  • #10
I guess you are right.

All done
 
  • #11
In the interest of clarity, I feel it is necessary to explain my last post.

ZapperZ is absolutely correct. A project like this poses multiple hazards and should not be attempted.

After careful consideration, I have decided to discontinue this endeavor.
 
  • #12
I could imagine the feds zipping to wherever this is if it ever produces anything radioactive. Shame you're discontinuing it.
 
  • #13
Hi Blenton,
ZapperZ is the expert. Why risk anything dangerous or possibly unlawful? The project is discontinued, disassembled and I am returning to my interest in silicon based plasma.

The accelerator related youtube videos have also been removed in the interest of public safety. I would also recommend that this thread be removed from this forum, but I doubt that is going to happen.
 
  • #14
Atomic Parts said:
Hi Blenton,
ZapperZ is the expert. Why risk anything dangerous or possibly unlawful? The project is discontinued, disassembled and I am returning to my interest in silicon based plasma.

The accelerator related youtube videos have also been removed in the interest of public safety. I would also recommend that this thread be removed from this forum, but I doubt that is going to happen.

Sadly, the most interesting projects involve taking risks. I find it hard to believe that you're discontinuing the project. If that's what you're really doing, why haven't you considered researching the relevant laws and safety procedures? Why not seek out experimentalists and ask for advice?
 
  • #15
Atomic Parts said:
"Do you know if you will be in violation of safety laws?"

No more than if I was operating a Fusor.

That site seems to have the legal philosophy of "how to hide what you are doing so that the law enforcement agencies never find it". That's an odd attitude for something legal.

ideasrule said:
If that's what you're really doing, why haven't you considered researching the relevant laws and safety procedures?

Licensure is not trivial. One of the very first questions they will ask is "you're producing neutrons, so you'll be activating things. How do you propose to characterize and dispose of the radioactive waste you produce?" To give you an idea of what this entails, the instructions for sending low-level waste to Barnwell are 69 pages long.
 
  • #16
Vanadium50 wrote,

"That site seems to have the legal philosophy of "how to hide what you are doing so that the law enforcement agencies never find it". That's an odd attitude for something legal."

Plain and simple, that is a false statement. If you spend even a minute browsing that site you will see that it is no secret that the average member is striving for neutron output. They even have a list called "The Neutron Club". Every so often, a member will activate some type of metal. When this happens, the achievment is plastered everywhere on the site.

After reviewing your "recognitions" I find it suprising that this is your definition of "how to hide what you are doing so that the law enforcement agencies never find it."
 
  • #17
I disagree - do a search on "legal" on that site and you'll see many a message on how to hide what is going on. The thread "Hobbiest Trouble" was particularly enlightening.
 
  • #18
Atomic Parts said:
Hi Blenton,
ZapperZ is the expert. Why risk anything dangerous or possibly unlawful? The project is discontinued, disassembled and I am returning to my interest in silicon based plasma.

The accelerator related youtube videos have also been removed in the interest of public safety. I would also recommend that this thread be removed from this forum, but I doubt that is going to happen.

I won't remove it, but I will go ahead and lock it.
 

1. How does a homemade particle accelerator work?

A homemade particle accelerator works by using electricity to generate and accelerate particles, directing them through a series of magnets and tubes to increase their speed and energy. The particles are then collided with a target, producing new particles and allowing scientists to study their properties.

2. What materials are needed to build a homemade particle accelerator?

The materials needed to build a homemade particle accelerator include a high-voltage power supply, vacuum pumps, metal pipes, magnets, and a target material. Other tools and equipment, such as a soldering iron and a vacuum chamber, may also be necessary depending on the specific design and purpose of the accelerator.

3. Is it safe to build and operate a homemade particle accelerator?

Building and operating a homemade particle accelerator can be dangerous if proper precautions are not taken. The high-voltage power supply and vacuum system present electrical and mechanical hazards, and the particles produced by the accelerator can also be harmful. It is important to have a thorough understanding of the equipment and safety protocols before attempting to build and operate a homemade particle accelerator.

4. What can a homemade particle accelerator be used for?

A homemade particle accelerator can be used for a variety of purposes, such as studying particle physics, conducting experiments in nuclear physics, and producing medical isotopes for diagnostic and therapeutic purposes. It can also be used to demonstrate and teach the principles of particle physics to students and the general public.

5. Are there any limitations to a homemade particle accelerator?

There are several limitations to a homemade particle accelerator, including the cost and availability of materials, the difficulty in achieving high energies and precision in particle collisions, and the potential safety hazards. Additionally, a homemade particle accelerator may not have the same capabilities and resources as larger, professional accelerators used for scientific research.

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