How do you make a partical excelarator that uses negitive ions?

[Caden-Lutz]

Im trying to make a particle excelerator for school using - ions but i can't find any b prints or anyone who can help me. if anyone can help or find some one that could at least explane some of it to me, it would be much appreceated

 

[Bob S]

The biggest problem with accelerating negative ions is preventing stripping the excess electron off the ion during acceleration. It is possible to attach two electrons to a proton, creating an H-minus ion. There are ion sources designed specifically to generate H-minus ions. The best example of accelerating H-minus ions is the Spallation Neutron Source (SNS, www.SNS.gov[/URL]) at Oak Ridge National Laboratory in Tennessee. These ions are accelerated to nearly 1000 MeV before both electros are stripped off.