DESY Summer Student report

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Presentation transcript:

DESY Summer Student report Characterization of LYSO scintillator screen for future diagnostic of PWFA beams Author Oscar Cipolato University of Padua, Italy Physics Department Supervisor Pardis Niknejadi DESY FLA-PWA DESY Summer Student report

DESY Summer Student report FLASHForward FLASHForward is a project to conduct Future-ORiented Wakefield Accelerator Research and Development at the DESY free-electron laser (FEL) facility FLASH. Produce high-quality beams with electron-beam-driven acceleration (high energy, high current, low energy spread and emittance) Systematically analyze bunch parameters (emittance, beam size, …) for different injection techniques Ultimate goal: demonstrate Free-Electron Laser (FEL) gain from plasma-accelerated electron beams DESY Summer Student report

DESY Summer Student report What is PWFA? DESY Summer Student report

VS Usefulness of PWA Accelerating gradient achievable in conventional RF cavities around 100 MeV/m Accelerating gradient 10-100 GeV/m DESY Summer Student report

Scintillator screen diagnostic In FLASHForward high energy electron bunches are created co-propagating with the laser used for ionizing the plasma Intense E field of the laser may interfere with the diagnostic of the electron beam It is necessary to block the laser before diagnostic of the electron bunch Solution: scintillator screen is able to reflect the laser while it can be also used for diagnostic DESY Summer Student report

DESY Summer Student report Gaussian beam Minimun transverse size of the beam DESY Summer Student report

DESY Summer Student report Experimental setup DESY Summer Student report

Calibration of image with calorimeter DESY Summer Student report

DESY Summer Student report Beam spot size In many setups the beam is not perfectly symmetric, so as beam waist is used the range between the fit values of x and y DESY Summer Student report

DESY Summer Student report Final results It can be fine tuned for further characterizing the screen DESY Summer Student report