These abnormal cases included: (a) two minimum points close to each other were identified between two maximum points; (b) two maximum points close to each other were identified between two minimum points; (c) no maximum point was identified between two minimum points; and (d) no minimum point was identified between two maximum points.
The trap depth is the electric potential difference between the potential minimum point and the ion escaping point.
In Figure 9, a green square represents that multi-maximum points exist between two minimum points; a megenta square represents that multi-minimum points exist between two maximum points; a black pentagram represents that a maximum point is missing nearby; a blue diamond represents that a minimum point is missing nearby.
After further analysis of the data between the two minimum points and estimation of the value of dP, the missing maximum point was found out; (c) When dW 2 was within the normal range, if two minimum points were identified between two maximum points and this dW 1 was below the lower limit, then a minimum point was detected false.
After further analysis of the data between the two minimum points and estimation of the value of dP, the missing maximum point was found out; When dW 2 was within the normal range, if two minimum points were identified between two maximum points and this dW 1 was below the lower limit, then a minimum point was detected false.
Comparing the amplitudes of these two minimum points, and the smaller one was chosen as the final minimum point, under the premise that dT was within the normal range; (d) When dW 2 was within the normal range, if no maximum point was identified between two minimum points and dW 1 was out of the normal range, then a minimum point was missing.
Comparing the amplitudes of these two maximum points, and the bigger one was chosen as the final maximum point, under the premise that dP was within the normal range; When dW 1 was within the normal range, if no maximum point was identified between two minimum points and dW 2 was beyond the normal range, then a maximum point was missing.
Comparing the amplitudes of these two maximum points, and the bigger one was chosen as the final maximum point, under the premise that dP was within the normal range; (b) When dW 1 was within the normal range, if no maximum point was identified between two minimum points and dW 2 was beyond the normal range, then a maximum point was missing.
The followings were specific ways for discrimination: (a) When dW 1 was within the normal range, if two maximum points were identified between two minimum points and this dW 2 was below the lower limit, then a maximum point was detected false.
