Recent content by kawikdx225

Some info about the SHIM. The SHIM uses a single atom for it's emission source. A single helium ion generates many secondary electrons so very low beam currents can be used without loosing signal to noise. The surface interaction is very different from a conventional SEM, even at high beam...

Helium is also much harder to ionize.

You are absolutly correct Michael. The problem is that an ion microscope is much harder to design than the electron microscope but these hurdles have recently been overcome and you can expect to see the worlds first scanning helium ion microscope sometime in June 06. I have seen the prototype...

Acceleration is absolute. You can always tell if an object is accelerating or not.

In an airplane you want lots of air moving over the wing to create lift. By putting the prop at the front of the plane you create more lift during takeoff and landing when the planes velocity is low. There are exceptions to this as I have seen funny looking airplanes with the prop at the rear...

Thanks for all your help. :smile:

The implantation of He into Si is a side effect of our tool that we are trying to characterize. This is done at room temperature with a 40KeV He+ ion. There is no annealing and we sure hope there are no nanocavities created by this process lol. Lets assume I have a silicon sphere at 20C...

Hello all, I need to know the rate at which Helium will diffuse through a solid, specifically silicon. Assume I accelerate and implant a He+ ion into a bulk silicon substrate. How long will it take to diffuse out of the silicon? I know it will depend on the temp of Si and the depth of...

There are no top quarks in a proton. A proton is made of two up quarks and a down quark.

one, two, Freddy's coming for you. three, four, better lock the door. five, six, grab a crucifix seven, eight, it's too late nine, ten, Freddy's back again! :eek:

1. My guess would be the one with the lowest frequency. 2. I would think the largest (most massive) particle would have the shortest range.

If your talking about a Cockroft Walton voltage multiplier then you put AC in and get DC out. I simulated this in Electronic workbench and used the o-scope to measure ripple, use AC coupling. The amount of ripple depends on a bunch of things, check out this website...

The examples I listed are for electrons accelerated in a vacuum, no wires. Particle accelerators, SEM's and TEM's routinly accelerate electrons to near the speed of light. Electrons flowing through a wire will never see these speeds as chroot explained.

I can't answer most of your questions but regarding the velocity of the electron I can give a few examples. An electron accelerated with a voltage of: 1KV travels at 18728 km/s 30KV travels at 0.328 c 100KV travels at 0.548 c 1MeV travels at 0.941 c Electrons can travel pretty fast...

You don't even need a gap for the electron to jump across. With a sharp emitter and a high electrostatic field you can shoot an electron into the vacuum of free space like a bullet leaving a gun.