S. N. Zhang, O. Adriani, S. Albergo, G. Ambrosi, Q. An, T. W. Bao, R. Battiston, X. J. Bi, Z. Cao, J. Y. Chai, J. Chang, G. M. Chen, Y. Chen, X. H. Cui, Z. G. Dai, R. D'Alessandro, Y. W. Dong, Y. Z. Fan, C. Q. Feng, H. Feng, Z. Y. Feng, X. H. Gao, F. Gargano, N. Giglietto, Q. B. Gou, Y. Q. Guo, B. L. Hu, H. B. Hu, H. H. He, G. S. Huang, J. Huang, Y. F. Huang, H. Li, L. Li, Y. G. Li, Z. Li, E. W. Liang, H. Liu, J. B. Liu, J. T. Liu, S. B. Liu, S. M. Liu, X. Liu, J. G. Lu, M. Mazziotta, N. Mori, S. Orsi, M. Pearce, M. Pohl, Z. Quan, F. Ryde, H. L. Shi, P. Spillantini, M. Su, J. C. Sun, X. L. Sun, Z. C. Tang, R. Walter, J. C. Wang, J. M. Wang, L. Wang, R. J. Wang, X. L. Wang, X. Y. Wang, Z. G. Wang, D. M. Wei, B. B. Wu, J. Wu, X. Wu, X. F. Wu, J. Q. Xia, H. L. Xiao, H. H. Xu, M. Xu, Z. Z. Xu, H. R. Yan, P. F. Yin, Y. W. Yu, Q. Yuan, M. Zha, L. Zhang, L. Y. Zhang, Y. Zhang, Y. J. Zhang, Y. L. Zhang, Z. G. Zhao
The High Energy cosmic-Radiation Detection (HERD) facility is one of several space astronomy payloads of the cosmic lighthouse program onboard China's Space Station, which is planned for operation starting around 2020 for about 10 years. The main scientific objectives of HERD are indirect dark matter search, precise cosmic ray spectrum and composition measurements up to the knee energy, and high energy gamma-ray monitoring and survey. HERD is composed of a 3-D cubic calorimeter (CALO) surrounded by microstrip silicon trackers (STKs) from five sides except the bottom. CALO is made of about 104 cubes of LYSO crystals, corresponding to about 55 radiation lengths and 3 nuclear interaction lengths, respectively. The top STK microstrips of seven X-Y layers are sandwiched with tungsten converters to make precise directional measurements of incoming electrons and gamma-rays. In the baseline design, each of the four side SKTs is made of only three layers microstrips. All STKs will also be used for measuring the charge and incoming directions of cosmic rays, as well as identifying back scattered tracks. With this design, HERD can achieve the following performance: energy resolution of 1% for electrons and gamma-rays beyond 100 GeV, 20% for protons from 100 GeV to 1 PeV; electron/proton separation power better than 10-5; effective geometrical factors of >3 m2sr for electron and diffuse gamma-rays, >2 m2sr for cosmic ray nuclei. R and D is under way for reading out the LYSO signals with optical fiber coupled to image intensified CCD and the prototype of one layer of CALO.
A new astrometric telescope, Multi-Function Astronomical Transit, has been built in Yunnan Astronomical Observatory.
Its main imaging device is a digital CCD camera without refrigeration because the telescope is only used to observe stars
brighter than 7.5mag. As an astrometric telescope like the Lower Latitude Meridian Circle, some special errors from the
horizon and the altitude axis of the telescope must be measured. Thus two analog CCD cameras are used. The digital
camera is connected to a digital frame grabber via a Camera Link cable and a custom-made cable, while the two analog
cameras are connected to an analog frame grabber by two custom-made cables. The two frame grabbers are separately
mounted in two image workstations and operate in external trigger mode. Two trigger signals are generated by the
telescope control system, one for the digital camera, another for the two analog cameras. The software of image
acquisition is programmed using VC++ and Sapera LT. This paper presents an imaging system solution for the new
transit, programming methods and the test observation results.
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