How to create tick marks within an arched area

I need to recreate this dial and I've learned how to create evenly spaced tick marks within a circle, but this is an ellipse.  Here, I attempted to draw two ellipse then used the scissors to cut them to size.  Then I used the line tool and drew each of the tick marks.  Then I adjusted the weights of each tick.  This is not a good method because the end ticks are not meeting the ends of the ellipse perfectly, leaving a tiny bit of tick mark outside the ellipse.  There must be a better way to do this. Here is what I ended up with:

But this is what I need to create:

(I only need to create the arched part with tick marks of this dial)

Any help is appreciated, but please note that I am familiar with only the very basics of illustrator, I simply don't do this type of work often enough to completely understand the software.

Thanks!!!!