So you have a disk with windows on... and a raid-0 all set up and ready to roll, yes? If so almost any imaging software will be quite capable of doing a full partition copy to the raid.
If you want a free one take a look at easeus todo backup. It will be able to make a direct (raw) copy of the disk to the raid-0.
With the question though I'm wondering if you are perhaps hoping to make a raid-0 by added a disk to the one you already have? If so that's destructive, you can raid-1 like that but not raid-0. You'd need to do a partition copy to another disk (mechanical?), make the raid-0 (SSD?) then copy it back.