M. Pedrozzi
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View article: Review of the high field performance of normal-conducting, tuning-free RF technology developed at the Paul Scherrer Institute
Review of the high field performance of normal-conducting, tuning-free RF technology developed at the Paul Scherrer Institute Open
At the Paul Scherrer Institute (PSI) in Switzerland, a process for manufacturing normal-conducting, tuning-free travelling-wave (TW) accelerating structures has been developed over the past decade through a collaboration between the instit…
View article: Beam-based commissioning of a novel <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>X</mml:mi></mml:math>-band transverse deflection structure with variable polarization
Beam-based commissioning of a novel -band transverse deflection structure with variable polarization Open
Longitudinal electron-beam diagnostics play a critical role in the operation and control of x-ray free-electron lasers, which rely on parameters such as the current profile, the longitudinal phase space, or the slice emittance of the parti…
View article: Proof-of-principle <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> source for future colliders
Proof-of-principle source for future colliders Open
The PSI Positron Production (P3 or P-cubed) experiment is a e+ source and capture system with the potential to increase by an order of magnitude the state-of-the-art e+ yield normalized to the drive linac energy, a highly desirable goal fo…
View article: Toward a brightness upgrade to the SwissFEL: A high gradient traveling-wave rf photogun
Toward a brightness upgrade to the SwissFEL: A high gradient traveling-wave rf photogun Open
The first generation of S-band injectors for free-electron lasers has illustrated high reliability and performance by driving the latest generation of high brightness machines. However, the ultimate electron beam brightness of these device…
View article: The P$^3$ Experiment: A Positron Source Demonstrator for Future Lepton Colliders
The P$^3$ Experiment: A Positron Source Demonstrator for Future Lepton Colliders Open
The PSI Positron Production (P$^3$ or P-cubed) experiment is a demonstrator for a e+ source and capture system with potential to improve the state-of-the-art e+ yield by an order of magnitude. The experiment is driven by the FCC-ee injecto…
View article: SwissFEL double bunch operation
SwissFEL double bunch operation Open
SwissFEL has a unique capability, among the normal conducting linac-based light sources, to simultaneously serve two separate undulator lines (Aramis and Athos) up to the machine repetition rate of 100 Hz using the double bunch operation m…
View article: The FCCee Pre-Injector Complex
The FCCee Pre-Injector Complex Open
The international FCC study group published in 2019 a Conceptual Design Report for an electron-positron collider with a centre-of-mass energy from 90 to 365 GeV with a beam currents of up to 1.4 A per beam. The high beam current of this co…
View article: Novel <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>X</mml:mi></mml:math>-band transverse deflection structure with variable polarization
Novel -band transverse deflection structure with variable polarization Open
A collaboration between DESY, PSI and CERN has developed and built an advanced modular X-band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. The prototype of th…
View article: Impact of laser stacking and photocathode materials on microbunching stability in photoinjectors
Impact of laser stacking and photocathode materials on microbunching stability in photoinjectors Open
Microbunching instability is a well-known phenomenon that may deteriorate the performance of accelerators. The instability may be triggered by a shot-noise mechanism or by some initial intensity modulations at the generation of the electro…
View article: The SwissFEL soft X-ray free-electron laser beamline: Athos
The SwissFEL soft X-ray free-electron laser beamline: Athos Open
The SwissFEL soft X-ray free-electron laser (FEL) beamline Athos will be ready for user operation in 2021. Its design includes a novel layout of alternating magnetic chicanes and short undulator segments. Together with the APPLE X architec…
View article: Status of Athos, the Soft X-Ray FEL Line of SwissFEL
Status of Athos, the Soft X-Ray FEL Line of SwissFEL Open
The Athos line will cover the photon energy range from 250 to 1900 eV and will operate in parallel to the hard X-ray line Aramis of SwissFEL. The paper will describe the current layout of the Athos FEL line starting from the fast kicker ma…
View article: The PolariX-TDS Project: Bead-Pull Measurements and High-Power Test on the Prototype
The PolariX-TDS Project: Bead-Pull Measurements and High-Power Test on the Prototype Open
A collaboration between DESY, PSI and CERN has been established to develop and build an advanced modular X- band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. …
View article: RF Jitter and Electron Beam Stability in the SwissFEL Linac
RF Jitter and Electron Beam Stability in the SwissFEL Linac Open
The X-ray FEL machine SwissFEL at the Paul Scherrer Institut in Switzerland is commissioned and transiting to user operation smoothly. FEL operation requires stringent requirements for the beam stability at the linac output, such as the el…
View article: Low energy dark current collimation system in single-pass linacs
Low energy dark current collimation system in single-pass linacs Open
The dark current emitted from a surface of a radio frequency cavity may be a severe issue for the activation and the protection of the components of linear accelerators, if this current is lost in an uncontrolled manner. For a single-pass …
View article: Status of the Polarix-TDS Project
Status of the Polarix-TDS Project Open
A collaboration between DESY, PSI and CERN has been established to develop and build an advanced modular X-band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. T…
View article: Sub-Femtosecond Time-Resolved Measurements Based on a Variable Polarization X-Band Transverse Deflecting Structures for SwissFEL
Sub-Femtosecond Time-Resolved Measurements Based on a Variable Polarization X-Band Transverse Deflecting Structures for SwissFEL Open
The SwissFEL project, under commissioning at the Paul Scherrer Institut (PSI), will produce FEL radiation for soft and hard X-rays with pulse durations ranging from a few to several tens of femtoseconds. A collaboration between DESY, PSI a…
View article: Consolidation and Extension of the High-gradient LINAC RF Technology at PSI
Consolidation and Extension of the High-gradient LINAC RF Technology at PSI Open
For SwissFEL a novel production process for high-gradient, high-precision C-band accelerating structures had been developed at PSI and was implemented for series production in collaboration with industry. The copper parts of the structures…
View article: Operation of a quasi-optical gyrotron with a Gaussian output coupler
Operation of a quasi-optical gyrotron with a Gaussian output coupler Open
Note: Proceedings of the 17th Int. Conference on Infrared and Millimeter Waves, Pasadena, USA, December 1992, SPIE Vol. 1929, 266 - 267 (1992) Reference CRPP-CONF-1992-016 Record created on 2008-05-13, modified on 2017-05-12
View article: SwissFEL: The Swiss X-ray Free Electron Laser
SwissFEL: The Swiss X-ray Free Electron Laser Open
The SwissFEL X-ray Free Electron Laser (XFEL) facility started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users in 2018 on the Aramis hard X-ray branch. In the followin…
View article: X-Band TDS Project
X-Band TDS Project Open
Based on the success of the X-Band Transverse Deflecting Structure (TDS) diagnostic at LCLS*, a collaboration between DESY, PSI and CERN has formed with the aim of developing and building an advanced modular X-Band TDS system. The designed…
View article: Preservation of low slice emittance in bunch compressors
Preservation of low slice emittance in bunch compressors Open
Minimizing the dilution of the electron beam emittance is crucial for the performance of accelerators, in particular for free electron laser facilities, where the length of the machine and the efficiency of the lasing process depend on it.…
View article: Temporal profile measurements of relativistic electron bunch based on wakefield generation
Temporal profile measurements of relativistic electron bunch based on wakefield generation Open
A complete characterization of the time-resolved longitudinal beam phase space is important to optimize the final performances of an accelerator, and in particular this is crucial for Free Electron Laser (FEL) facilities. In this study we …
View article: Application of a PWFA to an X-ray FEL
Application of a PWFA to an X-ray FEL Open
There is a growing demand for X-ray Free-electron lasers (FELs) in various science fields, in particular for those with short pulses, larger photon fluxes and shorter wavelengths. The level of X-ray power and the pulse energy depend on the…
View article: Low emittance injector design for free electron lasers
Low emittance injector design for free electron lasers Open
Several parameters determine the performance of free electron lasers: the slice and the projected emittance, the slice energy spread, and the peak current are the most crucial ones. The peak current is essentially obtained by magnetic comp…