Adding a spacer

[Kevin Brown]

I'm brand new to lilypond and attempting to lay out bagpipe music.   
The problem is that the embellishments end up too close to the notes  
that follow them, particularly Throws on D etc.  Image of the output  
I'm complaining about attached.  Essentially, I've read the section  
in the manual about horizontal spacing 3 times, and have attempted to  
do \overrides to transparent throwing various symbols there.  Putting  
s1 or similar seems to place a measure bar there....  Nothing seems  
to work.  How do I increase the spacing?  I'd be perfectly happy with  
the equivalent of:

\slurd \spacer d2

Or, even better would be a way to define spacing after specific notes  
so that it happened all by itself.

Thanks for your time.