P. Krejcik

A high resolution ion beam for implantation and nuclear analysis

P. Krejcik

New X-Band RF Deflector for Femtosecond Diagnostics of LCLS-II Beams

Valery A Dolgashev, Harmanpreet Bassan, Shantha Condamoor, Andrew Haase et autres

An X-band transverse deflector has been successfully developed for femtosecond electron and x-ray pulse temporal diagnostic at the LCLS [1]. The working frequency for the deflector is 11.424 GHz. New free electron laser LCLS-II has two undulator beamlines, one Soft-X-Ray and another …

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Performance of the SLAC-PAL-Vitzrotech X-band Cavity BPMs in the LCLS-II Undulator Beam Lines

Christopher D. Nantista, Sonya Hoobler, Changbum Kim, P. Krejcik et autres

The hard X-ray and soft X-Ray undulator beamlines of the LCLS-II X-ray FEL incorporate 65 X-band RF beam position monitors for accurate tracking of the electron beam trajectories and Beam-Based Alignment. For this crucial function, a design was jointly developed between PAL …

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A simple method for a very short X-ray pulse production and attosecond diagnostic at LCLS

Alexander Novokhatski, Dorian Bohler, A. Brachmann, William Colocho et autres

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RECENT IMPROVEMENTS IN THE SLC POSITRON SYSTEM PERFORMANCE

P. Krejcik, Jeff Corbett, S. Ecklund, P. Emma et autres

The positron system is very specific to the SLC in that the positrons are accelerated in the same linac as the electrons that produce them and the electrons with which they collide. Some of the difficulties in tuning this system to peak …

Development for a supercompact X -band pulse compression system and its application at SLAC

Juwen W. Wang, Sami G. Tantawi, Chen Xu, Matt Franzi et autres

We have successfully designed, fabricated, installed, and tested a super compact $X$-band SLAC Energy Doubler system at SLAC. It is composed of an elegant 3 dB coupler--mode converter--polarizer coupled to a single spherical energy storage cavity with high ${Q}_{0}$ of 94000 and …

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Sub-fs Resolution with the Enhanced Operation of the X-band Transverse Deflecting Cavity using an RF pulse Compression SLED Cavity

P. Krejcik, Gordon Bowden, Shantha Condamoor, Yuantao Ding et autres

The successful operation of the x-band transverse deflecting cavity (XTCAV) installed downstream of the LCLS undulator has been further enhanced by the recent addition of an RF pulse compression "SLED" cavity that doubles the temporal resolving power of this powerful diagnostic system …

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Measurements of Wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source

Karl LF Bane, Gennady V. Stupakov, Zhen Zhang, Alan S. Fisher et autres

The RadiaBeam/SLAC dechirper, a structure consisting of pairs of flat, metallic, corrugated plates, has been installed just upstream of the undulators in the Linac Coherent Light Source (LCLS).As a dechirper, with the beam passing between the plates on axis, longitudinal wakefields are …

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Performance of the New Fast Wire Scanner at the LCLS

P. Krejcik, Marc Campell, John M. D'Ewart, Henrik Loos et autres

A new fast wire scanner based on a linear DC servo motor acting through dual bellows has been developed at SLAC. After successful beam testing at LCLS we are now replacing all the old style stepping motor driven scanners with the new …

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Transverse Profiling of an Intense FEL X-Ray Beam Using a Probe Electron Beam

P. Krejcik

Monitoring the pulse by pulse output intensity and profile of an FEL is a critical measurement both for users and for optimising the accelerator drive beam. The diagnostic challenge is to find a technique that is not susceptible to damage at high …

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Implementation of a Corrugated-Plate Dechirping System for GeV Electron Beam at LCLS

M. Harrison, Alisha Babbitt, Manuel Carrasco, Antonio Cedillos et autres

A new corrugated-plate Dechirper was recently installed in the LCLS and underwent commissioning tests to gauge its efficacy in shaping the longitudinal phase space of bunches entering the FEL. Here, we describe in detail the completed four-meter LCLS Dechirper system along with …

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R&D of a Super-compact SLED System at SLAC

Juwen Wang, Gordon Bowden, Shantha Condamoor, Yuantao Ding et autres

We have successfully designed, fabricated, installed and tested a super-compact X-Band SLED system at SLAC. It is composed of an elegant mode converter/polarizer and a single sphere energy store cavity with high Q of 94000 and diameter less than 12 cm. The …

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