KamLAND-PICO Dark Mater Search Project

K. Fushimi, Y. Awatani, H. Ejiri, R. Hazama, H. Ikeda, K. Imagawa, K. Inoue, A. Kozlov, R. Orito, T. Shima, R. Sugawara, K. Yasuda

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Dark matter search project KamLAND-PICO is proposed. The first phase of the project aims to verifying the annual modulation signal which has been reported by DAMA/LIBRA. The last phase of the project aims to determining the type of interaction between WIMPs and nucleus. The thin and wide area NaI(Tl) detector PICO-LON has been developed to determine the type of WIMPs interaction. The good performance of PICO-LON detector was obtained. The energy threshold was as low as 2 keVee and the the energy resolution was as small as 25% at 60 keVee. The highly pure NaI(Tl) crystal has been developed in collaboration with the Japanese developer. The purity of U and Th chain contaminants have been reduced to the order of a few tens of ppt. It should be remarked that the concentration of 210Pb was reduced to about 60 μBq/kg. The sensitivity to spin-independent WIMPs are discussed by applying 170 modules of NaI(Tl) with the dimension of 5 inch ρ× 5 inch.

Original languageEnglish
Pages (from-to)67-73
Number of pages7
JournalPhysics Procedia
Publication statusPublished - 2015
Event13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 - , United States
Duration: 2013 Sept 82013 Sept 13


  • NaI(Tl)
  • WIMPs search


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