@misc{oai:repo.qst.go.jp:00067036, author = {黄, 開 and 黄 開}, month = {Nov}, note = {Detections of the pulse durations and arrival timings of relativistic electron beams are important issues for accelerators. Electro-optic diagnostics on the Coulomb fields of electron beams have the advantages of single shot and non-destructive characteristics We present a study of introducing the electro-optic spatial decoding technique3 to laser wakefield acceleration (LWFA). To determine the time scale of the observed signal, a temporal mapping relationship is necessary. By placing an electro-optic crystal very close to a gas target, we discovered that the Coulomb field of the electron bunch possessed a spherical structure and was inconsistent with the previously widely used model. The field structure was demonstrated by experimental measurement, analytic calculations and simulations. A new temporal mapping relationship with generality was derived in a geometry where the signals had spherical wavefronts. This study could be helpful for the applications of electro-optic diagnostics in laser plasma acceleration experiments., HZDR workshop}, title = {Application of the electro-optic spatial decoding technique in laser wakefield acceleration}, year = {2018} }