FIRST ELECTRO-OPTICAL BUNCH LENGTHMEASUREMENTS AT THE EUROPEAN XFEL

Three electro-optical bunch length detection systems based on spectral decoding have been installed and are being commissioned at the European XFEL. The systems are capable of recording individual longitudinal bunch profiles with sub-picosecond resolution at a bunch repetition rate 1.13 MHz. Bunch lengths and arrival times of entire bunch trains with single-bunch resolution have been measured as well as jitter and drifts for consecutive bunch trains. In this paper, we present first measurement results for the electrooptical detection system located after the second bunch compressor. A preliminary comparison with data from the bunch arrival-time monitor shows good agreement.

[1]  B. Beutner,et al.  Online Longitudinal Bunch Profile and Slice Emittance Diagnostics at the European XFEL , 2017 .

[2]  H. Schlarb,et al.  THE BUNCH ARRIVAL TIME MONITOR AT FLASH AND EUROPEAN XFEL , 2017 .

[3]  V. Schlott,et al.  YTTERBIUM FIBER LASER FOR ELECTRO-OPTICAL PULSE LENGTH MEASUREMENTS AT THE SWISSFEL , 2009 .

[4]  Dariusz Makowski,et al.  Real-time Data Acquisition and Processing System for MHz Repetition Rate Image Sensors , 2018 .

[5]  Sara Casalbuoni,et al.  Numerical studies on the electro-optic detection of femtosecond electron bunches , 2008 .

[6]  Dariusz Makowski,et al.  KALYPSO: A Mfps Linear Array Detector for Visible to NIR Radiation , 2017 .

[7]  B. Steffen.  A Compact Single Shot Electro-Optical Bunch Length Monitor for the SwissFEL , 2009 .

[8]  A M MacLeod,et al.  Single-shot electron-beam bunch length measurements. , 2002, Physical review letters.

[9]  D. Nölle,et al.  Commissioning of the European XFEL , 2019 .

[10]  A M MacLeod,et al.  Electro-optic technique with improved time resolution for real-time, nondestructive, single-shot measurements of femtosecond electron bunch profiles. , 2004, Physical review letters.

[11]  Tomasz Kozak,et al.  Compact MTCA.4 Based Laser Synchronization , 2014 .

[12]  W. A. Gillespie,et al.  Electro-optic time profile monitors for femtosecond electron bunches at the soft x-ray free-electron laser FLASH , 2009 .

[13]  T. N. Hansen,et al.  Clocking femtosecond X rays. , 2005, Physical review letters.

[14]  Kay Rehlich,et al.  The Control System for the Linear Accelerator at the European XFEL: Status and First Experiences , 2017 .