The internal targets used in the storage ring are quite promising targets due to the well defined reaction vertex, low background and undisturbed reaction products. Light-isotope targets, such as hydrogen and deuteriu...The internal targets used in the storage ring are quite promising targets due to the well defined reaction vertex, low background and undisturbed reaction products. Light-isotope targets, such as hydrogen and deuterium, are the most favorite candidates for hadron physics study. For physical experiments, the figure of merit is usually the luminosity, and it is found that the frozen micro-spheres (called pellets) could provide a high luminosity which is comparable to that of an external target, whereas the conventional gas targets can not reach this criterion because of the heavy gas load in the reaction chamber. A global detector with nearly '4 configuration can be arranged around the pellet target. In the near future, a pellet target facility with global detectors is foreseen at CSRm in Lanzhou.展开更多
A pellet target facility with global detectors will be constructed at CSRm, Lanzhou for hadron physics research. The pellet diameter ranges from 25 to 35 μm, and thus an effective target thickness of 1015 - 1016 atom...A pellet target facility with global detectors will be constructed at CSRm, Lanzhou for hadron physics research. The pellet diameter ranges from 25 to 35 μm, and thus an effective target thickness of 1015 - 1016 atoms/cm2 is expected. The number of stored particles in CSRm is estimated to be 1×109 particles per cycle with the existing accelerator(s) as the injector. With the aid of a planned booster as the injector, the maximum stored particles per cycle can be elevated to 1×1012. The revolution frequency is typically in the order of 1 MHz for the present CSRm ring with a circumference of 161.0 m. With the new booster, a maximum experimental luminosity for pellet target is estimated to be 1×1034/(cm2·s).展开更多
文摘The internal targets used in the storage ring are quite promising targets due to the well defined reaction vertex, low background and undisturbed reaction products. Light-isotope targets, such as hydrogen and deuterium, are the most favorite candidates for hadron physics study. For physical experiments, the figure of merit is usually the luminosity, and it is found that the frozen micro-spheres (called pellets) could provide a high luminosity which is comparable to that of an external target, whereas the conventional gas targets can not reach this criterion because of the heavy gas load in the reaction chamber. A global detector with nearly '4 configuration can be arranged around the pellet target. In the near future, a pellet target facility with global detectors is foreseen at CSRm in Lanzhou.
文摘A pellet target facility with global detectors will be constructed at CSRm, Lanzhou for hadron physics research. The pellet diameter ranges from 25 to 35 μm, and thus an effective target thickness of 1015 - 1016 atoms/cm2 is expected. The number of stored particles in CSRm is estimated to be 1×109 particles per cycle with the existing accelerator(s) as the injector. With the aid of a planned booster as the injector, the maximum stored particles per cycle can be elevated to 1×1012. The revolution frequency is typically in the order of 1 MHz for the present CSRm ring with a circumference of 161.0 m. With the new booster, a maximum experimental luminosity for pellet target is estimated to be 1×1034/(cm2·s).
