IPAC2016 - List of Authors (Cope, T.M.)

Paper	Title	Page
WEPOW055	Bayesian Optimization of FEL Performance at LCLS	2972
	M.W. McIntire, T.M. Cope, D.F. Ratner SLAC, Menlo Park, California, USA S. Ermon Stanford University, Stanford, California, USA
	Funding: Research is supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515. The LCLS free-electron laser at SLAC is tuned via a huge number of parameters such as energy and magnet settings. Much of this tuning, including quadrupole magnet settings, is typically done by hand by the LCLS operators. In this paper we introduce an automated tuning system using Bayesian optimization, and describe its application to the optimization of noisy objectives such as FEL performance. We demonstrate with preliminary results from our implementation at LCLS that this system can improve both the speed of tuning procedures as well as the quality of the resulting solution.
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WEPOY036	Progress in Automatic Software-based Optimization of Accelerator Performance	3064
	S.I. Tomin, G. Geloni XFEL. EU, Hamburg, Germany I.V. Agapov, I. Zagorodnov DESY, Hamburg, Germany W.S. Colocho, T.M. Cope, A.B. Egger, D.F. Ratner SLAC, Menlo Park, California, USA Y.A. Fomin, Y.V. Krylov, A.G. Valentinov NRC, Moscow, Russia
	Funding: partial support from Ioffe Roentgen Institute grant EDYN EMRAD For modern linac- and storage-ring-based light sources certain amount of empirical tuning is used to reach ultimate performance. The possibility to perform such empirical tuning by automatic methods has now been demonstrated by several authors (e.g. I.Agapov et al. in proc IPAC 2015). In this paper we present the progress in development of our automatic optimisation software based on OCELOT and its applications to SASE FEL optimization at FLASH and LCLS, and its potential for storage ring optimization.
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THPOY051	Upgrades to the SPEAR3 Single-Photon Bunch Measurement System	4223
	T.M. Cope, S. Allison, W.J. Corbett, Y.H. Xu SLAC, Menlo Park, California, USA
	The SPEAR3 accelerator uses a Single Photon Time-Correlated Counting (TCSPC) system to accurately measure the time profile of electron bunches circulating in the storage ring. The detection hardware uses the PicoHarp 300 TCSPC processor module initially equipped with an available Hamamatsu H7360-01 photon counting head. The H7360-01 was later replaced with a PicoQuant Hybrid-06 PMA to decrease single-photon arrival time jitter. At the same time we adopted an EPICS-based TCSPC software package developed at DIAMOND for robust data acquisition and display. In this paper we report on recent beam profile measurements and upgrades to the data acquisition software system including installation of a local EPICS IOC for real-time access to the bunch profile from SLAC's centralized Accelerator Control Room (ACR). High-level operator interface and monitoring applications developed in Python are discussed.
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Paper

Title

Page

Bayesian Optimization of FEL Performance at LCLS

2972

M.W. McIntire, T.M. Cope, D.F. Ratner
SLAC, Menlo Park, California, USA
S. Ermon
Stanford University, Stanford, California, USA

Funding: Research is supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.
The LCLS free-electron laser at SLAC is tuned via a huge number of parameters such as energy and magnet settings. Much of this tuning, including quadrupole magnet settings, is typically done by hand by the LCLS operators. In this paper we introduce an automated tuning system using Bayesian optimization, and describe its application to the optimization of noisy objectives such as FEL performance. We demonstrate with preliminary results from our implementation at LCLS that this system can improve both the speed of tuning procedures as well as the quality of the resulting solution.

Export •

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

WEPOY036

Progress in Automatic Software-based Optimization of Accelerator Performance

3064

S.I. Tomin, G. Geloni
XFEL. EU, Hamburg, Germany
I.V. Agapov, I. Zagorodnov
DESY, Hamburg, Germany
W.S. Colocho, T.M. Cope, A.B. Egger, D.F. Ratner
SLAC, Menlo Park, California, USA
Y.A. Fomin, Y.V. Krylov, A.G. Valentinov
NRC, Moscow, Russia

Funding: partial support from Ioffe Roentgen Institute grant EDYN EMRAD
For modern linac- and storage-ring-based light sources certain amount of empirical tuning is used to reach ultimate performance. The possibility to perform such empirical tuning by automatic methods has now been demonstrated by several authors (e.g. I.Agapov et al. in proc IPAC 2015). In this paper we present the progress in development of our automatic optimisation software based on OCELOT and its applications to SASE FEL optimization at FLASH and LCLS, and its potential for storage ring optimization.

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

THPOY051

Upgrades to the SPEAR3 Single-Photon Bunch Measurement System

4223

T.M. Cope, S. Allison, W.J. Corbett, Y.H. Xu
SLAC, Menlo Park, California, USA

The SPEAR3 accelerator uses a Single Photon Time-Correlated Counting (TCSPC) system to accurately measure the time profile of electron bunches circulating in the storage ring. The detection hardware uses the PicoHarp 300 TCSPC processor module initially equipped with an available Hamamatsu H7360-01 photon counting head. The H7360-01 was later replaced with a PicoQuant Hybrid-06 PMA to decrease single-photon arrival time jitter. At the same time we adopted an EPICS-based TCSPC software package developed at DIAMOND for robust data acquisition and display. In this paper we report on recent beam profile measurements and upgrades to the data acquisition software system including installation of a local EPICS IOC for real-time access to the bunch profile from SLAC's centralized Accelerator Control Room (ACR). High-level operator interface and monitoring applications developed in Python are discussed.

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