A calibration method aimed for the differential nonlinearity (DNL) error of the Low Energy X-ray Instrument (LE) onboard the Hard X-ray Modulation Telescope (HXMT) is presented, which is independent with electronic systems used as testing platform and is only determined by the analog-to-digital converter (ADC) itself. Exploring this method, ADCs that are used within the flight model phase of HXMT-LE can be calibrated individually and independently by a non-destructive and low-cost way, greatly alleviating the complexity of the problem. As a result, the performance of the energy spectrum can be significantly improved, further more, noise reduced and resolution enhanced.
@article{arxiv.1404.6303,
title = {A linear calibration method on DNL error for energy spectrum},
author = {Lu Bo and Fu Yan-Hong and Chen Yong and Cui Wei-Wei and Wang Yu-Sa and Xu Yu-Peng and Yin Guo-He and Yang Yan-Ji and Zhang Yi and Huo Jia and Li Wei and Cheng Tian-Xiang and Hu Wei and Han Da-Wei and Li Mao-Shun and Wang Juan and Wang Yu and Liu Xiao-Yang and Zhu Yue and Zhao Zhong-Yi and Zhang Ya},
journal= {arXiv preprint arXiv:1404.6303},
year = {2014}
}