Design and set-up of a spectrometer for the electro-optical far-field setup to monitor the CSR at KARA

At the KIT storage ring KARA (Karlsruhe Research Accelerator), a new system to monitor the emitted coherent synchrotron radiation (CSR) is under commissioning aiming for single-shot measurements. The electro-optical (EO) far-field setup measures the time profile of the CSR employing electro-optical spectral decoding (EOSD). To achieve a sub-picosecond resolution for single-shot measurements, a high signal-to-noise ratio is crucial. Therefore, a spectrometer setup for balanced detection is developed. The ultra-fast line camera KALYPSO (KArlsruhe Linear arraY detector for MHz-rePetition rate SpectrOscopy) will be installed as a detector. This contribution discusses the development and setup of the spectrometer, including optics simulations and first experiments.