ICALEPCS2015 - List of Authors (Loos, H.)

Paper	Title	Page
MOPGF014	LLRF Controls Upgrade for the LCLS XTCAV project at SLAC	110
	S. Condamoor, Y. Ding, P. Krejcik, H. Loos, T.J. Maxwell, J.J. Olsen SLAC, Menlo Park, California, USA
	Funding: This work was performed in support of the LCLS project at SLAC. Work supported by the U.S. Department of Energy under contract number DE-AC02-76SF00515. SLAC's Low Level Radio Frequency (LLRF) controls software for the S-Band deflecting structures needed to be upgraded significantly when a new X-Band transverse deflecting cavity (XTCAV) was installed downstream of the LCLS undulators in Spring 2013 to assist in FEL diagnostics such as characterizing the temporal profile of X-ray pulses that vary shot-to-shot. The unique location of the XTCAV in the beamline posed several challenges. A new design of the Modulator and Klystron control Support Unit (MKSU-II) for interlocking was added at the XTCAV controls station that required new software development. The timing setup was also different from the rest of the Linac. This paper outlines the LLRF controls layout for the XTCAV and discusses the manner in which the challenges were addressed. XTCAV has now become a successful tool for gathering data that enables reconstruction of X-ray FEL power profiles with greater resolution. SLAC Publication Number: SLAC-PUB-16414
	Poster MOPGF014 [3.676 MB]
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MOPGF015	Fast Wire Scanner Upgrade for LCLS	114
	J.M. D'Ewart, M.L. Campell, P. Krejcik, H. Loos, K. Luchini SLAC, Menlo Park, California, USA
	Wire scanners are a main diagnostic tool for transverse beam size and emittance measurements at LCLS. The original SLAC wire scanners were not optimized for speed (taking minutes to scan), and can't perform at the desired level of position resolution necessary for measuring LCLS' small beam size. A new fast wire scanner, based on a dc linear servo motor, has been designed and installed in the LCLS. The new fast wire scanner has several advantages over the original wire scanner: scan times are reduced from minutes to seconds while minimizing wire vibrations. Rather than counting open-loop step pulses, the new fast wire scanner uses real time position capture for beam synchronous sampling of the wire position, enhancing beam profile accuracy.
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MOPGF038	Design and Commissioning Results of MicroTCA Stripline BPM System	180
	S. L. Hoobler, R.S. Larsen, H. Loos, J.J. Olsen, S.R. Smith, T. Straumann, C. Xu, A. Young SLAC, Menlo Park, California, USA
	The Linac Coherent Light Source (LCLS) is a free electron laser (FEL) facility operating at the SLAC National Accelerator Laboratory (SLAC). A stripline beam position monitor (BPM) system was developed at SLAC [1] to meet the performance requirements necessary to provide high-quality stable beams for LCLS. This design has been modified to achieve improved position resolution in a more compact form factor. Prototype installations of this system have been operating in the LCLS LINAC and tested at the Pohang Accelerator Laboratory (PAL). Production systems are deployed at the new PAL XFEL facility and at the SPEAR storage ring at the Stanford Synchrotron Radiation Lightsource at SLAC. This paper presents the design and commissioning results of this system.
	Poster MOPGF038 [0.874 MB]
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Paper

Title

Page

LLRF Controls Upgrade for the LCLS XTCAV project at SLAC

110

S. Condamoor, Y. Ding, P. Krejcik, H. Loos, T.J. Maxwell, J.J. Olsen
SLAC, Menlo Park, California, USA

Funding: This work was performed in support of the LCLS project at SLAC. Work supported by the U.S. Department of Energy under contract number DE-AC02-76SF00515.
SLAC's Low Level Radio Frequency (LLRF) controls software for the S-Band deflecting structures needed to be upgraded significantly when a new X-Band transverse deflecting cavity (XTCAV) was installed downstream of the LCLS undulators in Spring 2013 to assist in FEL diagnostics such as characterizing the temporal profile of X-ray pulses that vary shot-to-shot. The unique location of the XTCAV in the beamline posed several challenges. A new design of the Modulator and Klystron control Support Unit (MKSU-II) for interlocking was added at the XTCAV controls station that required new software development. The timing setup was also different from the rest of the Linac. This paper outlines the LLRF controls layout for the XTCAV and discusses the manner in which the challenges were addressed. XTCAV has now become a successful tool for gathering data that enables reconstruction of X-ray FEL power profiles with greater resolution.
SLAC Publication Number: SLAC-PUB-16414

Poster MOPGF014 [3.676 MB]

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

MOPGF015

Fast Wire Scanner Upgrade for LCLS

114

J.M. D'Ewart, M.L. Campell, P. Krejcik, H. Loos, K. Luchini
SLAC, Menlo Park, California, USA

Wire scanners are a main diagnostic tool for transverse beam size and emittance measurements at LCLS. The original SLAC wire scanners were not optimized for speed (taking minutes to scan), and can't perform at the desired level of position resolution necessary for measuring LCLS' small beam size. A new fast wire scanner, based on a dc linear servo motor, has been designed and installed in the LCLS. The new fast wire scanner has several advantages over the original wire scanner: scan times are reduced from minutes to seconds while minimizing wire vibrations. Rather than counting open-loop step pulses, the new fast wire scanner uses real time position capture for beam synchronous sampling of the wire position, enhancing beam profile accuracy.

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MOPGF038

Design and Commissioning Results of MicroTCA Stripline BPM System

180

S. L. Hoobler, R.S. Larsen, H. Loos, J.J. Olsen, S.R. Smith, T. Straumann, C. Xu, A. Young
SLAC, Menlo Park, California, USA

The Linac Coherent Light Source (LCLS) is a free electron laser (FEL) facility operating at the SLAC National Accelerator Laboratory (SLAC). A stripline beam position monitor (BPM) system was developed at SLAC [1] to meet the performance requirements necessary to provide high-quality stable beams for LCLS. This design has been modified to achieve improved position resolution in a more compact form factor. Prototype installations of this system have been operating in the LCLS LINAC and tested at the Pohang Accelerator Laboratory (PAL). Production systems are deployed at the new PAL XFEL facility and at the SPEAR storage ring at the Stanford Synchrotron Radiation Lightsource at SLAC. This paper presents the design and commissioning results of this system.

Poster MOPGF038 [0.874 MB]

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