Nicholas Walker, an accelerator physicist based at DESY in Hamburg, Germany, has worked 15 years on linear collider design and is one of three project managers for the ILC Engineering Design Phase.

• 华克是德国DESY实验室的加速器物理学家，已经从事直线加速器研究达15年，也是ILC工程设计阶段的三位计画主持人之一。