ion-assisted electron injection
Posted: Fri May 20, 2016 9:14 pm
okay, we have two methods of injection ions and electrons:
* gas puff
* ion guns and electron guns.
it occurred to me that gas puffs may be a good way of getting high precision, if you have a long thin nozzle, a very cold gas, and a continuous very slow injection.
then i thought, well it would also be nice to inject the ions and electrons co-linear, just with a gun, and then they can de-ionize and the heavy ion can help straighten out the electron's course.
then it occured to me that since the ion is so much heavier, you could just put the ion gun in back, perfectly on-axis, and then in front of that put an electron source, maybe in a tight circle around the axis. as the ion passes through, it'll grab the electron and give it a nice straight course, before they ionize again. (alternatively you could shoot the ions off in a circle around a linear or pointwise electron source.)
so it's kind of a hybrid between gas puff and electron/ion injection.
ion-assisted electron injection.
in addition to providing a straight course for the electron until it reaches a point where it ionizes, it provides a quasi-neutral environment for both the ions and the electrons, thus helping mitigate mutual electric repulsion, resulting in a more focused beam.
* gas puff
* ion guns and electron guns.
it occurred to me that gas puffs may be a good way of getting high precision, if you have a long thin nozzle, a very cold gas, and a continuous very slow injection.
then i thought, well it would also be nice to inject the ions and electrons co-linear, just with a gun, and then they can de-ionize and the heavy ion can help straighten out the electron's course.
then it occured to me that since the ion is so much heavier, you could just put the ion gun in back, perfectly on-axis, and then in front of that put an electron source, maybe in a tight circle around the axis. as the ion passes through, it'll grab the electron and give it a nice straight course, before they ionize again. (alternatively you could shoot the ions off in a circle around a linear or pointwise electron source.)
so it's kind of a hybrid between gas puff and electron/ion injection.
ion-assisted electron injection.
in addition to providing a straight course for the electron until it reaches a point where it ionizes, it provides a quasi-neutral environment for both the ions and the electrons, thus helping mitigate mutual electric repulsion, resulting in a more focused beam.