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Everything posted by fredreload

  1. Right that is true = =, it would turn into something messy, shouldn't they have fixed the problem for x rays by now so they all go in the same direction? My idea is a really long vacuum tube, the light going in other directions will get filtered out while only the one going straight will stay. There is probably a simple way to fix it like a mirror or something. Below is from Google @@
  2. Something like an optical filter, but the light could be scattered meaning it goes in all random directions like a shot gun. You're saying this won't work because it is scattered?
  3. Yes, I've known for a long time you cannot apply RF in this system since the post I mentioned x ray = =, but thanks still Does it have to be the same frequency @@? It would be easy to apply a filter though
  4. Then how do you propose we slow down the rotation of the atoms = =? Or does it not matter for laser cooling? P.S. I was thinking the stimulated emission recoil would brake(atomic friction) it, I could be wrong P.S. For instance I got a rotating metal ball, I use a magnet to push it on both sides, it would slow down right? But such might not apply on an atomic scale
  5. Tapping on 6 sides has a brake effect on the CoM motion of the atoms, I said rotation(CoM motion) not spin. P.S. Would it have a brake effect @@? This is a bit of a speculation
  6. I am cooling a 1 meter BEC so I prefer flash lights @@, although I might go with x rays because it has a higher frequency(both can be produced in large quantities). Microwave would not work, you need something shorter than 780nm to keep the atoms in place. Microwave only has a milimeter wavelength(see below).
  7. Well, visible light/flash light is 780nm, precisely the range for lighting up rubidium atoms. Although flash lights are not as precise and coherent than lasers. But you could create a magneto-optic trap with flash lights. Alkali atoms also absorb a wide range of electromagnetic radiation including x rays. You are trying to stop both the rotation and translation from 6 sides. Imagine tapping a balloon from 6 sides. Ya, but the amount of photons it absorbs varies with the frequency of light. I got an article here to prove just the case, and I will make a summary below.
  8. The atoms or if I use as an example the water molecules pretty much absorb light of all wavelength ranging from radio wave to gamma ray(perhaps), the important part is you want to lock the atom in place, like trying to stop a spinning globe in place, so if the wavelength is too long, like if I touch the globe once every second, it would not stop as oppose to using an x-ray(the shorter the wavelength the better), the thing is it needs to be applied in equal from six directions(if not 8), or else it would get push around in the opposite direction of the laser. So alignment is very important.
  9. Well, if I shown a flash light in 6 directions with sodium atoms inside a vacuum in a dark room would it work @@?
  10. Ya, else there would be CoM motion. Have you tried something of a higher frequency like x-ray? It is like trying to stop a spinning globe on 6 sides.
  11. Hmm, my guess for the term atomic resonance is that the atom has to be locked in it position first, then apply resonance frequency say 500MHz to slow it down. For example, MRI(magnetic resonance imaging), there is also the term resonance in it, but since the water molecules are already locked inside the body, it becomes easier to lined them up with the magnetic field and apply the radio wave frequency afterward. Same goes for the magneto-optical trap, the 780nm laser is there as a doppler shift to counteract the bulk majority of the momentum of the gas particle, also the other side of the lase
  12. My bad @@, I will answer this myself, with a supporting article(no procedure though it is pop sci). https://physicsworld.com/a/taming-light-with-cold-atoms/ "What we did was to cool sodium atoms to just 50 billionths of a degree above absolute zero and then illuminate them with a carefully tuned laser beam. This “coupling laser” changed the optical properties of the atoms so dramatically that when a separate laser pulse was sent through the cloud of atoms, its speed was reduced by a factor of some 20 million. The size of the light pulse was also affected, shrinking from 1 km in free space
  13. No, gonna take a break and look into fusion/solar flare next P.S. How much photons can the presumed laser cooled sodium ions store?
  14. O, that makes sense @@, I guess we need a few big magnetron laser for this one if we want a 1 meter BEC P.S. Thanks for clearing it up for me
  15. So, when a 780nm laser hits a sodium gas item it would create a 500MHz resonance at the center of the atom @@? I am not getting the picture but I will try to draw it. You can correct it for me anyway you want
  16. Well Swanson sir, what I don’t get is why do you need a nanometer laser to cool a gas atom that has an absorption spectrum of 500MHz which is radio wavelength? I might have missed something and I apologize if I do @@ Not getting this part See 500MHz is radio wave, did I miss something? I see, so you are saying if I apply a 500MHz frequency it would subject to a lower frequency at the gas atom center.
  17. Just coming from the newbies point about view about the radio wave @@. If that does not work then might have to resort to the magnetron laser to get enough juice to power up the laser. But I'd give the radio wave method a shot before that happens
  18. Hmm, I still think the radio wave technique is worth a shot before I switch to big lasers. Just 1 meter of gas chamber with 6 antennas emitting 500MHz radio wave. If you are worried that it would get re-thermalize than perhaps a magnetic field can be used to encage the gas ions.
  19. Ya, I see that the point of the magneto-optical trap is to have the gas ions absorb the photons but not to trap it in a magnetic field, you are right. P.S. Well, how would you design a 1 meter BEC? With bigger lasers? P.S. Bigger lasers sound good
  20. Well, I am pretty much trying to recreate this thing @@, the magneto-optic trap (https://en.wikipedia.org/wiki/Magneto-optical_trap) P.S. Tell me that is different from my setup
  21. Kinda similar meaning the Earnshaw theorem also applies for your magneto-optic trap idea which is using magnetic field. " It is usually referenced to magnetic fields, but was first applied to electrostatic fields. " Wikipedia I changed it to a plus so the plates are now exerting a push force to the sodium ions(not an attraction force), which should keep the atoms in the center.
  22. You can't just say Earnshaw's theorem is not in favor of my electric field idea, but is in favor of the magneto-optic trap idea(which is kind of similar but using a magnetic field in this case). Well what it does prove is that only the push force works but not the pull force = =, thanks for the correction, I will use the positive electric field plates in this case = =. This is from Wikipedia about the Earnshaw's theorem: "Informally, the case of a point charge in an arbitrary static electric field is a simple consequence of Gauss's law. For a particle to be in a stable equilibri
  23. A capacitor got a positive and a negative plate. I align 4 negative plate(top, down, left, right) with sodium atoms situated in the middle. Sodium atom is an ion with a +1 charge, so it will get pulled by the four capacitor plates. Thereby trapping the atoms at the center, if it still spins I will apply an extra radio wave to reduce the CoM movement. P.S. The electric force is also much greater than the magnetic one if the magneto-optical trap is not doing this already.
  24. Sodium atom are well, mostly ions cuz of salt you know @@(easily losing a valence electron in the outer shell). Now is just a matter if it can trap light(photons). Ionno what frequency range of light it traps and the temperature it needs to achieve sodium ions BEC.
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