J. Chang
Purple Mountain Observatory
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by J. Chang.
Journal of the Physical Society of Japan | 2009
T. Tamjra; S. Torii; K. Yoshida; Hisashi Kitamura; T. Yamagami; J. Chang; Issei Iijima; Akira Kadokura; K. Kasahara; Y. Katayose; Tamaki Kobayashi; Y. Komori; Y. Matsuzaka; K. Mizutani; H. Murakami; Michiyoshi Namiki; J. Nishimura; S. Ohta; Y. Saito; M. Shibata; N. Tateyama; Hisao Yamagishi; T. Yuda
We carried out electron observations with balloons to investigate acceleration and propagation of electrons in the universe. We developed BETS (Balloon-borne Electron Telescope with Scintillation fibers) for electron observations in Sanriku. We obtained electron energy spectrum from 10 to 100 GeV with it. At higher energies, the energy spectrum of electron might show some structure caused by nearby sources like the Vela supernova remnant. In order to observe the energy spectrum above 100 GeV, we needed a thicker calorimeter and a longer observation time. We developed PPB-BETS (Polar Patrol Balloon-BETS) by improving BETS to carry out a long duration ballooning in Antarctica. Energy spectrum of electrons from 100 to 1000 GeV was obtained by a successful fight for 13 days. The arrival direction of electrons seems to be consistent with isotropic distribution for the data taken with PPB-BETS, although we need better statistics to make it clear. We have a future plan to make an observation of electrons and gam...
Advances in Space Research | 2008
K. Yoshida; S. Torii; T. Yamagami; T. Tamura; Hisashi Kitamura; J. Chang; Issei Iijima; Akira Kadokura; K. Kasahara; Y. Katayose; Tamaki Kobayashi; Y. Komori; Y. Matsuzaka; K. Mizutani; H. Murakami; Michiyoshi Namiki; J. Nishimura; S. Ohta; Y. Saito; M. Shibata; N. Tateyama; Hisao Yamagishi; T. Yuda
Advances in Space Research | 2006
S. Torii; K. Yoshida; T. Tamura; Hisashi Kitamura; T. Yamagami; N. Tateyama; Kazuaki Anraku; Toshiyasu Yamashita; J. Chang; J. Nishimura; Y. Saito; S. Ohta; Michiyoshi Namiki; Y. Matsuzaka; Issei Iijima; Hisao Yamagishi; Akira Kadokura; K. Kasahara; S. Ogawa; M. Fujii; Y. Tasaki; H. Kaiho; M. Shibata; Y. Katayose; T. Inoue; K. Mizutani; Y. Hirai; H. Murakami; T. Kobayashi; Y. Komori
Advances in Space Research | 2008
S. Torii; K. Yoshida; K. Kasahara; T. Tamura; J. Chang
Advances in Space Research | 2008
T. Ma; J. Chang; N. Zhang; M. S. Cai; Y. Z. Gong; H. S. Tang; R. J. Zhang; N. S. Wang; M. Yu; J. P. Mao; S. B. Su; Z. Fang; R. Xu; Y. M. Hu; Q. Gu; Y. L. Zhou; A.A. Xu; L. G. Liu
Journal of the Physical Society of Japan | 2009
J. Chang; T Ma; N Zhang; M Yu; A. Xu A.
29th International Cosmic Ray Conference, ICRC 2005 | 2007
S. Torii; T. Tamura; N. Tateyama; K. Hibino; T. Yuda; K.Yoshida K.Yoshida; K. Kashiwagi; S. Okuno; J. Nishimura; T. Yamagami; Y. Saito; H. Fuke; Masahiro Takayanagi; Hiroshi Tomida; Satoshi Ueno; F. Makino; M. Shibata; Y. Katayose; S. Kuramata; M. Ichimura; Yukio Uchihori; Hisashi Kitamura; K. Kasahara; H. Murakami; Tamaki Kobayashi; Y. Komori; K. Mizutani; T. Terasawam; R. E. Streitmatter; J. W. Mitchell
29th International Cosmic Ray Conference, ICRC 2005 | 2005
J. Chang; S. Torii; K. Kasahara; T. Tamura; K.Yoshida K.Yoshida
30th International Cosmic Ray Conference, ICRC 2007 | 2007
K. Yoshida; S. Torii; T. Tamura; Hisashi Kitamura; T. Yamagami; J. Chang; Issei Iijima; Akira Kadokura; K. Kasahara; Y. Katayose; Tamaki Kobayashi; Y. Komori; Y. Matsuzaka; K. Mizutani; H. Murakami; Michiyoshi Namiki; J. Nishimura; S. Ohta; Y. Saito; M. Shibata; N. Tateyama; Hisao Yamagishi; T. Yuda
29th International Cosmic Ray Conference, ICRC 2005 | 2005
S. Torii; T. Tamura; T. Yamagami; Masaki Ejiri; Hisashi Kitamura; Issei Iijima; Akira Kadokura; K. Kasahara; Y. Katayose; Tamaki Kobayashi; Y. Komori; Y. Matsuzaka; K. Mizutani; H. Murakami; Michiyoshi Namiki; J. Nishimura; S. Ohta; Y. Saito; M. Shibata; N. Tateyama; Hisao Yamagishi; K.Yoshida K.Yoshida; T. Yuda; J. Chang
