A practical ion trap system for precision laser spectroscopy

可應用於精密雷射光譜測量之離子阱系統

王宥人(Yu-Ren Wang)

指導教授 ： 王立邦

國立清華大學/理學院/物理學系/碩士(2010年)

https://doi.org/10.6843/NTHU.2010.00333

摘要

This dissertation reports on the setup of the apparatus for the trapping and detection of calcium ions. The apparatus consists of trapping electrodes, oven, and electron gun. The calcium ions are trapped in the linear Paul trap and we propose two methods for detection. First, by adding a driving voltage, the buffer gas cooled ion cloud will have a coherent oscillation, and this will cause induced current on the nearby metal rod. We design a circuit to detect this induced current signal to ensure the ion being trapped. Second, an optical detection scheme is implemented. We focus the cooling laser into the trap to excite calcium ion from ground state 42S1/2 to excited state 42P1/2 , and detect the ion fluorescence. This transition is at 397nm and the light source is achieved by second harmonic generation (SHG). The another repumping laser at 866nm is prepared for laser cooling of calcium ions. The application of cold calcium ions is for sympathetic cooling of other species of ions by collision.

關鍵字

離子阱

並列摘要

無資料

並列關鍵字

ion trap

參考文獻

[2] D. Wineland, R. Drullinger, and R Walls, Phys. Rev. Lett. 40, 1639 (1978).

[6] T. Hänsch and A. Schawlow, Opt. Commun. 13, 68 (1975).

[10] Erik Rudberg , Phys. Rev. 46, 763 (1934).

[12] E.S. Polzik and H.J.Kimble, Opt. Lett. 16, 1400 (1991).

[14] Keith R. Lykke, Opt. Commun. 157, 88 (1998).