Out of scattering plane (e,2e) and laser assisted electron impact autoionization studies of helium

该实验研究计划旨在研究原子氦的电子轰击电离。 One experiment will measure electron angular distributions of the two electrons, one the incoming electron and one the electron from the ionization, scattered from the atom over a full 360 degrees. Data will be taken in the region of the helium autoionizing states (excited states of atoms that decay by emission of particles rather than light), both on and off resonance.预计结果将为假设的双散射机制提供新的见解。 第二个实验将研究激光场存在下的氦自电离。 Ejected electron spectra will be measured which will contain sidebands separated from the normal autoionization peaks by energies equal to integral numbers of the photon energy.自电离峰的轮廓也有望因激光的存在而改变。该计划更广泛的影响涉及学生教育。学生获得激光、电子、真空系统、计算机编程、网络和实验接口方面的技能。他们在国内和国际会议上展示他们的工作。

This experimental research program is aimed at studies of electron-impact ionization of atomic helium. One experiment will measure electron angular distributions of the two electrons, one the incoming electron and one the electron from the ionization, scattered from the atom over a full 360 degrees. Data will be taken in the region of the helium autoionizing states (excited states of atoms that decay by emission of particles rather than light), both on and off resonance. The results are expected to add new insight into a postulated double scattering mechanism. A second experiment will investigate helium autoionization in the presence of a laser field. Ejected electron spectra will be measured which will contain sidebands separated from the normal autoionization peaks by energies equal to integral numbers of the photon energy. The profile of the autoionization peaks are also expected to be modified by the presence of the laser. The broader impact of the program involves student education. Students acquire skills in lasers, electronics, vacuum systems, and computer programming, networking, and interfacing with experiments. They present their work at national and international conferences.