Abstract
This article reviews the development of new technologies related with High Purity Germanium (HPGe) detector and the application of the new type HPGe detector on particle physics and astroparticle physics,especially the application of HPGe detector on the topics of ultra-low background experiments such as dark matter search experiment,double beta decay experiment and so on. China has established an underground laboratory for particle and astroparticle physics which has the deepest rock overburden in the world until now and name after China Jinping Underground Laborotory (CJPL). CDEX collaboration in China will search directly the dark matter particle with ton-scale ultra-low threshold HPGe array detector based on the point-contact technology in CJPL. This article also gives a brief review about the CDEX collaboration.
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