Perhaps you should try some spelling variations:
"particle accelerationd" » "particle acceleration", "particle accelerations", "particles acceleration"
"particles accelerated" » "particles acceleration", "partially accelerated", "lattices accelerated"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle acceleration", "particle accelerating"
"particle accelerate" » "particle acceleraton", "particle acceleration", "practice accelerate"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("particle accelerator") OR ((((("particle accelerators") OR ("particle accelerate"))) OR ((("particle accelerationd") OR ("particles accelerated")))))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((((( particle accelerators ) or ( particle accelerate ))) or ((( particle accelerationd ) or ( particles accelerated )))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((((("particle accelerators") or ("particle accelerate"))) or ((("particle accelerationd") or ("particles accelerated"))))))*.