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@InProceedings{lumpkin:ibic2020-thao05,
author = {A.H. Lumpkin and M. Downer and A. Irman and M. LaBerge and D.W. Rule},
title = {{Advanced Laser-driven Plasma Accelerator Electron-beam Diagnostics with COTR Techniques}},
booktitle = {Proc. IBIC'20},
pages = {206--210},
paper = {THAO05},
language = {english},
keywords = {electron, laser, bunching, radiation, FEL},
venue = {Santos, Brazil},
series = {International Beam Instrumentation Conference},
number = {9},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2020},
issn = {2673-5350},
isbn = {978-3-95450-222-6},
doi = {10.18429/JACoW-IBIC2020-THAO05},
url = {https://www.jacow.org/ibic2020/papers/thao05.pdf},
note = {https://doi.org/10.18429/JACoW-IBIC2020-THAO05},
abstract = {A significant advance in laser-driven plasma accelerator (LPA) electron-beam diagnostics has recently been demonstrated based on coherent optical transition radiation (COTR) imaging*. We find COTR signal strengths from a microbunched subset of beam exiting the LPA to be several orders of magnitude higher than that of incoherent optical transition radiation (OTR). The transverse sizes are only a few microns as deduced from the point-spread-function-related lobe structure. In addition, the far-field COTR interferometric images obtained on the same shot provide beam-size limits plus divergence and pointing information at the sub-mrad level when compared to an analytical model** with a recent revision. The integrated image intensities can be used to estimate the microbunching fraction and relatable to the LPA process. Initial results in a collaborative experiment at the Helmholtz-Zentrum Dresden-Rossendorf LPA will be reported for electron beam energies of about 215 MeV.},
}