Double-peak structures in transmission of H-2(+) ions through conical multicapillaries in a polymer: Projectile-energy dependence

作者：Liu, S. D.; Wang, Y. Y.^*; Zhao, Y. T.; Zhou, X. M.; Cheng, R.; Lei, Y.; Sun, Y. B.; Ren, J. R.; Duan, J. L.; Liu, J.; Xu, H. S.; Xiao, G. Q.

来源：Physical Review A, 2015, 91(1): 012714.

DOI：10.1103/PhysRevA.91.012714

• HIGHLY-CHARGED IONS
• GLASS-CAPILLARIES
• NANOCAPILLARIES
• SIMULATION
• BEAMS

Transmission experiments of 7-200 keV H-2(+) ions through conical multicapillaries with inlet or outlet diameters of 4/2 mu m and a length of 30 mu m etched in a PC polymer are reported. The yield of the transmitted particles as a function of the capillary tilt angle was measured. The results show that for 200 keV H-2(+) ions the guiding effect disappears but a focusing effect is obtained with a density enhancement factor of 3.5. For 7-50 keV H-2(+) ions their transmitted particle curves exhibit a pair of shoulder peaks on the left-and right-hand side of the center angle 0 degrees. As the ion energy increases, the shoulder-peak structure is found to vanish leaving one peak at 0 degrees.

• 出版日期2015-1-30
• 单位中国科学院大学; 中国科学院近代物理研究所