Patent ID: 7531808

Claim:
A method of measuring the depth corrected energy of an ionizing event from a co-planar grids sensor comprising a cathode electrode, a collecting grid and a non-collecting grid comprising the steps of: producing a collecting grid voltage and applying said collecting grid voltage to said collecting grid; said collecting grid voltage greater than about 0 Volts; producing a non-collecting grid voltage and applying said non-collecting grid voltage to said non-collecting grid; said non-collecting grid voltage less than said collecting grid voltage; producing a cathode voltage and applying said cathode voltage to said cathode electrode; detecting a voltage change of said collecting grid; detecting a voltage change of said non-collecting grid; summing said voltage change of said collecting grid and said voltage change of said non-collecting grid creating a sum; subtracting said voltage change of said collecting grid and said voltage change of said non-collecting grid creating a difference; dividing said sum by said difference creating a ratio; employing a step for determining a gain coefficient value from said ratio; and multiplying said difference by said gain coefficient; whereby said step of summing, said step of subtracting, said step of dividing, and said step of multiplying are all performed by one or more processing devices.