Hogan M J, Barnes C D, Clayton C E, Decker F J, Deng S, Emma P, Huang C, Iverson R H, Johnson D K, Joshi C, Katsouleas T, Krejcik P, Lu W, Marsh K A, Mori W B, Muggli P, O'Connell C L, Oz E, Siemann R H, Walz D
Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309, USA.
Phys Rev Lett. 2005 Jul 29;95(5):054802. doi: 10.1103/PhysRevLett.95.054802. Epub 2005 Jul 28.
A plasma-wakefield accelerator has accelerated particles by over 2.7 GeV in a 10 cm long plasma module. A 28.5 GeV electron beam with 1.8 x 10(10) electrons is compressed to 20 microm longitudinally and focused to a transverse spot size of 10 microm at the entrance of a 10 cm long column of lithium vapor with density 2.8 x 10(17) atoms/cm3. The electron bunch fully ionizes the lithium vapor to create a plasma and then expels the plasma electrons. These electrons return one-half plasma period later driving a large amplitude plasma wake that in turn accelerates particles in the back of the bunch by more than 2.7 GeV.
一个等离子体尾场加速器在一个10厘米长的等离子体模块中已将粒子加速超过2.7 GeV。一束具有1.8×10¹⁰个电子的28.5 GeV电子束在纵向被压缩至20微米，并在进入一个密度为2.8×10¹⁷原子/立方厘米、长10厘米的锂蒸汽柱入口处聚焦成横向光斑尺寸为10微米。电子束使锂蒸汽完全电离以产生等离子体，然后将等离子体电子排出。这些电子在半个等离子体周期后返回，驱动一个大振幅的等离子体尾波，进而使束团后部的粒子加速超过2.7 GeV。
