Pulse shape analysis in the liquid xenon multiwire ionisation chamber for PET

A method of computation of the pulse shape in an ionisation chamber with wire collectors has been developed and verified experimentally with a test chamber. Good agreement between the calculated waveforms and the acquired signals is obtained. Having proved its reliability, the same method was applied to study the dependence of the signal pulse shape and amplitude on the location of primary ionisation due to 511 keV γ-rays in the liquid xenon multiwire ionisation chamber for PET. A method of real-time amplitude correction for this effect is suggested, resulting in significant improvement of energy resolution. The simulated resolution for 511 keV γ-rays is 15%