V. Ayvazyan

Optimization of several operating parameters to increase the beam delivery time at the European XFEL

Vladimir VOGEL, V. Ayvazyan, Julien Branlard, Chris Christou et autres

The pulsed linac at EuXFEL, operated by DESY, is de-signed to deliver up to 2700 electron bunches during a beam delivery time of 600 µs within an RF flat-top time of 650 µs. The user community would like to have more photon …

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Optimization of some operating parameters to increase the beam delivery time at the European XFEL

Vladimir . Acteur Fogel, V. Ayvazyan, Julien Branlard, Chris Christou et autres

Currently, the pulsed linac at EuXFEL, operated at DESY, according to the design parameters can deliver up to 2700 electron bunches during an RF flat-top time of 600μs. The user community is interested to have more electron bunches that can be done …

Optimization of some operating parameters to increase the beam delivery time at the European XFEL

Владимир Фогель, V. Ayvazyan, Julien Branlard, Chris Christou et autres

Currently, the pulsed linac at EuXFEL, operated at DESY, according to the design parameters can deliver up to 2700 electron bunches during an RF flat-top time of 600μs. The user community is interested to have more electron bunches that can be done …

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RF Regulation with Superconducting Cavities and Beam Operation using a Frequency Shifted Cavity

Sven Pfeiffer, V. Ayvazyan, Julien Branlard, Thorsten Buettner et autres

The free-electron laser FLASH at DESY and the European XFEL are operated with superconducting radio frequency cavities and supply beam to several user experiments. The switching time between experiments is limited to dozens of microseconds. This contribution will show a regulation with …

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Author Correction: A MHz-repetition-rate hard X-ray free-electron laser driven by a superconducting linear accelerator

Winfried Decking, Suren Abeghyan, P. Abramian, A. Abramsky et autres

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A MHz-repetition-rate hard X-ray free-electron laser driven by a superconducting linear accelerator

Winfried Decking, Suren Abeghyan, P. Abramian, A. Abramsky et autres

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Continuous Wave Operation of Superconducting Accelerating Cavities With High Loaded Quality Factor

W. Cichalewski, J. Sekutowicz, Andrzej Napieralski, Radosław Rybaniec et autres

Close to 780 superconducting 1.3-GHz accelerating cavities made of bulk niobium have been installed in the European X-ray free electron laser (E-XFEL) linear accelerator. The linac can operate at a mean gradient (Eacc) of ca. 23 MV/m in the nominal short pulse …

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Results on FPGA-Based High-Power Tube Amplifier Linearization at DESY

Andrea Bellandi, V. Ayvazyan, Łukasz Butkowski, W. Cichalewski et autres

Vacuum-tube amplifiers are the most widespread type of radio frequency (RF) sources used to produce high-power signals needed for beam acceleration in superconducting cavities. At Deutsches Elektronen-Synchrotron (DESY), megawatt-rated klystrons are used to produce millisecond-long RF shots for pulsed operation in particle …

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Status of FLASH RF Systems, Recent Progress and Near Future Upgrades

V. Ayvazyan, D. Kostin, Uroš Mavrič, M. Hierholzer et autres

On-line RF Amplitude and Phase Calibration for Vector Sum Control

M. Grecki, V. Ayvazyan, Julien Branlard, Matthias Hoffmann et autres

Operation of the European XFEL Towards the Maximum Energy

Mathieu Omet, V. Ayvazyan, Julien Branlard, S. Choroba et autres

After the initial commissioning of the available 25 radio frequency (RF) stations of the European XFEL (RF gun, A1, AH1 and stations A2 through A23) a maximum electron beam energy of 14.5 GeV was achieved, 3 GeV short of the design energy …

Status of Cryomodule Testing at CMTB for CW R

Julien Branlard, V. Ayvazyan, Andrea Bellandi, J. Eschke et autres

Cryo Module Test Bench (CMTB) is a facility to perform tests on European XFEL like superconducting accelerating modules. The 120 kW Inductive Output Tube (IOT) installed in the facility allows driving the eight superconducting cavities inside the module under test in a …