# Ray gun from call of duty zombie?

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1. Feb 19, 2017

### Cozma Alex

Can a ray gun be created? What would it fire? plasma? I know that the dimendion of the ray gun are too short for what am i going to say, but i want to ask if aside this problem this could work: I thought that maybe the things that you put in the ray gun to charge it are batteries, and that the raygun has inside a vacuum chamber wherr there is a coaxial capacitor, and the electric field is strong enough to break the dielectric, hydrogen pass trough this capacitor and it becomes plasma (like in the lightenings) it gets ionized, the potential difference between the capacitors is mantained by the battery, (in order to minimize it and get a strong enough electric field to break the dielectric we minimize the distance between the "plates" of the capacitor. ( V= E * d) ) then, passed the capacitor the protons are guided by a varying magnetic field in a circular path and accelerated by a "mini" cyclotron, then the beam gets fired.... but, how do we control the moment when to take the shoot? I mean after the cycle the proton gets out of the cyclotron, we cannot control when to fire the beam by a mechanism activated by the trigger right? There should be a way to keep the beam inside the ray gun till the trigger is pulled, how can this be done? Another question, once fired the beam would collide with the air, would it be deviated by the target? I guess this depends on the velocity of the beam but a little of deviation would be inevitable right? The light that is seen when the beam is fired is due to the air ionization, what colour is it going to be? Blue?

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2. Feb 19, 2017

### Staff: Mentor

Just keep the protons in the cyclotron if you have one. Or start the whole acceleration process when the trigger is pulled. Small accelerators are fast.

A fast (relativistic) beam of protons would be able to travel through several hundred meters of air without too much deflection (but with notable radiation damage outside the main beam cone), lower-energetic protons won't have that range.

3. Feb 19, 2017

### Cozma Alex

Thanks for the answer, i think that if the accelerarion process is fast enough the best would be doing it once the trigger is pulled as you suggested, it save also a lot of energy, i tought accelerators need time to get partcles to high energy. Even tough this problem is solved I'm curious:
how can i keep the protons in the cyclotron? The cyclotron has one path that once completed, the proton gets out, am i right? Is not a loop

Is ionizing hydrogen with capacitor a good idea? Is it going to work? Thanks:)

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4. Feb 20, 2017

### Staff: Mentor

Big accelerators like the LHC need time (about an hour), but smaller accelerators are much faster. The Proton Synchrotron, which is still a large machine with 600 meters circumference, has a cycle time of just a second. The linear accelerators before that are even faster: The protons move through them at thousands of kilometers per second, and the accelerators are just something like 100 meters long: The acceleration has to be fast - less than a millisecond. If you start up the whole machine, it might need some time for calibration and whatever, but that is equivalent to the safety hatch, not the trigger.

It becomes a loop if you switch off the accelerating electric field.

High voltages are often used as proton sources. Lasers are an alternative.