Creating intense polarized electron beam via laser stripping and spin-orbit interaction

Danilov, V. ; Ptitsyn, V. ; Gorlov, T.

关键词: ANGULAR MOMENTUM;    ATOMS;    ELECTRIC FIELDS;    ELECTRON BEAMS;    ELECTRON SOURCES;    ELECTRONS;    ENERGY LEVELS;    HYDROGEN;    LASERS;    L-S COUPLING;    MAGNETIC FIELDS;    POLARIZATION;    QUANTUM NUMBERS;    SPIN;   

DOI  :  10.2172/1013524
RP-ID  :  BNL--94483-2010-IR
PID  :  OSTI ID: 1013524
Others  :  R&D Project: KBCH139
Others  :  18054
Others  :  Other: KB0202011
Others  :  TRN: US1102680

美国|英语

来源: SciTech Connect

【 摘 要 】

The recent advance in laser field make it possible to excite and strip electrons with definite spin from hydrogen atoms. The sources of hydrogen atoms with orders of magnitude higher currents (than that of the conventional polarized electron cathods) can be obtained from H{sup -} sources with good monochromatization. With one electron of H{sup -} stripped by a laser, the remained electron is excited to upper state (2P{sup 3/2} and 2P{sup 1/2}) by a circular polarization laser light from FEL. Then, it is excited to a high quantum number (n=7) with mostly one spin direction due to energy level split of the states with a definite direction of spin and angular momentum in an applied magnetic field and then it is stripped by a strong electric field of an RF cavity. This paper presents combination of lasers and fields to get high polarization and high current electron source.