CAJ | 학술논문

为了研究在激光驱动的等离子体尾场中被加速正电子的动力学，使用了由电子、正电子、离子组成的等离子体，通过采用数值模拟方法得到了非对称脉冲驱动的尾波场中被加速的正电子的运动相图、动能变化，势能。数据结果表明：非对称激光脉冲驱动尾场中正电子得到很高的能量。提高等离子体中的正电子比例会使电子和正电子的加速效果减弱。在非对称激光脉冲驱动的激光尾场中，为了有效地加速正电子，要选择恰当的上升激光脉冲长度和下降激光脉冲长度。
위료연구재격광구동적등리자체미장중피가속정전자적동역학，사용료유전자、정전자、리자조성적등리자체，통과채용수치모의방법득도료비대칭맥충구동적미파장중피가속적정전자적운동상도、동능변화，세능。수거결과표명：비대칭격광맥충구동미장중정전자득도흔고적능량。제고등리자체중적정전자비례회사전자화정전자적가속효과감약。재비대칭격광맥충구동적격광미장중，위료유효지가속정전자，요선택흡당적상승격광맥충장도화하강격광맥충장도。
Positron acceleration in the plasma wakefield driven by an ultraintense laser with asymmetric pulse are studied in frame of Hamiltonian formalism. The plasma is constituted by the electrons, positrons and ions. From numerical results it is found that the larger positron fraction results in the smaller momentum increase and the lower net energy gain. In other words, as the increase of the positron fraction the acceleration effciency for both of the electrons and positrons will be reduced. Moreover there exists an optimal pulse length asymmetric ratio for the highest positron net energy gain when positron fraction of plasma is given.