How to Boolean-diff just one side of a circle ?

 From:  Alomphega

How can I make a boolean diff on a circle just onto one side ?

I have tried to put the cutting object both at the exterior and at the interior prior to boolean-diff, but both are the same : 2 sides of my circle was cutted.
I would like to be able to cut just one, is there a way to do that ?


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