IBIC2021 - List of Authors (Krejcik, P.)

Paper	Title	Page
MOPP34	Performance of the SLAC-PAL-Vitzrotech X-band Cavity BPMs in the LCLS-II Undulator Beam Lines	136
	C.D. Nantista, S.L. Hoobler, P. Krejcik, D.S. Martinez-Galarce, B.D. McKee, M. Rowen, A. Young SLAC, Menlo Park, California, USA C. Kim PAL, Pohang, Republic of Korea
	Funding: Work supported by US DOE Contract No. DE-AC02-76SF00515. 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 and SLAC, consisting of a monopole reference cavity and a dipole position cavity, with signals coupled out through coaxial vacuum feed-throughs. For the relatively large quantity needed, the production of completed units was contracted to the Korean company, Vitzrotech, who developed the manufacturing processes to successfully fabricate the needed quantity. Herein, an overview is given of the production experience, tuning, installation, and performance of these devices.
	Poster MOPP34 [0.717 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP34
About •	paper received ※ 07 September 2021 paper accepted ※ 17 September 2021 issue date ※ 17 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP18	New X-Band RF Deflector for Femtosecond Diagnostics of LCLS-II Beams	412
	V.A. Dolgashev, H. Bassan, S. Condamoor, A.A. Haase, P. Krejcik, T.J. Maxwell, J.W. Wang SLAC, Menlo Park, California, USA
	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 Hard-X-Ray. The Hard-X-Ray line uses two one-meter long X-band deflectors for beam diagnostics. We have designed, build, installed and commissioned another, 1.5 meter long X-band deflector in the Soft-X-Ray beam line. Both Hard-X-Ray and Soft-X-Ray deflectors share one klystron. RF power is transmitted from a 50 MW klystron to a tunnel in an overmoded circular waveguide and then directed to either of the deflectors using a remotely controlled RF switch. The power split ratio could be changed arbitrarily, and both deflectors could work simultaneously. In this article, we provide details on the development and commissioning of the new deflector. [1] C. Behrens et al., ’Few-femtosecond time-resolved measurements of X-ray free-electron lasers’ Nat. Commun., vol. 5, no. 1, pp. 17, Apr. 2014, doi: 10.1038/ncomms4762.
	Poster WEPP18 [3.812 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP18
About •	paper received ※ 11 September 2021 paper accepted ※ 27 September 2021 issue date ※ 10 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

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

136

C.D. Nantista, S.L. Hoobler, P. Krejcik, D.S. Martinez-Galarce, B.D. McKee, M. Rowen, A. Young
SLAC, Menlo Park, California, USA
C. Kim
PAL, Pohang, Republic of Korea

Funding: Work supported by US DOE Contract No. DE-AC02-76SF00515.
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 and SLAC, consisting of a monopole reference cavity and a dipole position cavity, with signals coupled out through coaxial vacuum feed-throughs. For the relatively large quantity needed, the production of completed units was contracted to the Korean company, Vitzrotech, who developed the manufacturing processes to successfully fabricate the needed quantity. Herein, an overview is given of the production experience, tuning, installation, and performance of these devices.

Poster MOPP34 [0.717 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP34

About •

paper received ※ 07 September 2021 paper accepted ※ 17 September 2021 issue date ※ 17 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP18

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

412

V.A. Dolgashev, H. Bassan, S. Condamoor, A.A. Haase, P. Krejcik, T.J. Maxwell, J.W. Wang
SLAC, Menlo Park, California, USA

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 Hard-X-Ray. The Hard-X-Ray line uses two one-meter long X-band deflectors for beam diagnostics. We have designed, build, installed and commissioned another, 1.5 meter long X-band deflector in the Soft-X-Ray beam line. Both Hard-X-Ray and Soft-X-Ray deflectors share one klystron. RF power is transmitted from a 50 MW klystron to a tunnel in an overmoded circular waveguide and then directed to either of the deflectors using a remotely controlled RF switch. The power split ratio could be changed arbitrarily, and both deflectors could work simultaneously. In this article, we provide details on the development and commissioning of the new deflector.
[1] C. Behrens et al., ’Few-femtosecond time-resolved measurements of X-ray free-electron lasers’ Nat. Commun., vol. 5, no. 1, pp. 17, Apr. 2014, doi: 10.1038/ncomms4762.

Poster WEPP18 [3.812 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP18

About •

paper received ※ 11 September 2021 paper accepted ※ 27 September 2021 issue date ※ 10 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)