Speaker
Mr
Ziru Sang
(University of Science and Technology of China)
Description
Fast digital multi-channel analyzers (FDMCA) which base on flash ADC have been intensively used recently. The principle of FDMCA is different from the traditional MCA which based on the Wilkinson ADC. The non-linearity, including the INL and DNL, arising from flash ADC, degraded the accuracy of FDMCA. To improve the non-linearity of fast digital MCA, a practical off-line correction method has been proposed in this paper. A special measurement was made to obtain the non-linearity feature of the MCA system previously. And the non-linearity data should be saved to correct the other data originated from general measurement with the same system. Because the non-linearity in the same system is changeless strictly, the non-linearity can be eliminated by comparing the data between the general measurement and the previous special measurement.
A definition of the required algorithms is presented in this paper. Both electronics tests and radiation tests were done comparing the results with a commercial MCA. The results show that the correction method proposed is more helpful in improving measure accuracy than precision.
Author
Mr
Ziru Sang
(University of Science and Technology of China)
