Dear sir, sorry to say that with these parameters, ie 18 joules is impossible to end the disc, but when you consider that the transport will be the hair itself.
Less than 22 joules / 3 pulses / 3.1 Length / 30 milliseconds cooling do nothing.
Even if the IPL or Laser treatments have in common is a big problem and that their performance is not selective, resulting in some cases a residual hair in the end due to lack of size will have to be removed by a skilled electrologist.