ICALEPCS2013 - List of Keywords (undulator)

Paper	Title	Other Keywords	Page
MOPPC082	Automated Verification Environment for TwinCAT PLC Programs	PLC, interface, hardware, simulation	288
	A. Beckmann XFEL. EU, Hamburg, Germany
	The European XFEL will have three undulator systems SASE1, SASE2, and SASE3 to produce extremely brilliant, ultra-short pulses of x-rays with wavelengths down to 0.1 nm. The undulator gap is adjustable in order to vary photon beam energy. The corresponding motion control is implemented with industrial PCs running Beckhoff TwinCAT Programmable Logic Controllers (PLCs). So far, the functionality of the PLC programs has been verified on system level with the final hardware. This is a time-consuming manual task, but may also damage the hardware in case of severe program failures. To improve the verification process of PLC programs, a test environment with simulated hardware has been set up. It uses a virtual machine to run the PLC program together with a verification program that simulates the behavior of the hardware. Test execution and result checking is automated with the help of scripts, which communicate with the verification program to stimulate the PLC program. Thus, functional verification of PLC programs is reduced to running a set of scripts, without the need to connect to real hardware and without manual effort.
	Poster MOPPC082 [0.226 MB]

TUPPC052	Automation of the Wavelength Change for the FERMI Free Electron Laser	FEL, laser, electron, polarization	683
	C. Scafuri, B. Diviacco Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Funding: Work supported in part by the Italian Ministry of University and Research under grants FIRB-RBAP045JF2 and FIRB-RBAP06AWK3 FERMI is a users facility based on a seeded Free Electron Laser (FEL). A unique feature of FERMI in this new class of light sources is the tunability of the emitted photon beam both in terms of wavelength and polarization. Tuning is obtained by choosing the appropriate gap and phasing of the undulators in the chain and by opportunely setting the seed laser wavelength. A series of adjustments are then necessary in order to keep constant the machine parameters and optimize the radiation characteristics. We have developed a software application, named SuperGap, which does all the calculations and coordinates the operations required to set the desired wavelength and polarization. SuperGap allows operators to perform this procedure in seconds. The speed and accuracy of the wavelength change have been largely exploited during user dedicated shifts to perform various types of scans in the experimental stations. The paper describes the algorithms and numerical techniques used by SuperGap and its architecture based on the Tango control system.
	Poster TUPPC052 [1.116 MB]

TUCOCA01	XFEL Machine Protection System (MPS) Based on uTCA	linac, kicker, operation, FPGA	906
	S. Karstensen, M.E. Castro Carballo, J.M. Jäger, M. Staack DESY, Hamburg, Germany
	The European X-Ray Free Electron Laser (XFEL) linear accelerator will provide an electron beam with energies of up to 17.5 GeV and will use it to generate extremely brilliant pulses of spatially coherent xrays. With a designated average beam power of up to 600 kW and beam spot sizes down to few micrometers, the machine will hold a serious damage potential. To ensure safe operation of the accelerator it is necessary to detect dangerous situations by closely monitoring beam losses and the status of critical components. This is the task of the uTCA* based machine protection system (MPS). Many design features of the system have been influenced by experience from existing facilities, particularly the Free Electron Laser in Hamburg (FLASH), which is a kind of 1:10 prototype for the XFEL. A high flexibility of the MPS is essential to guarantee a minimum downtime of the accelerator. The MPS is embedded in the DOOCS** control system. * uTCA: Micro Telecommunications Computing Architecture ** DOOCS: Distributed Object Oriented Control System
	Slides TUCOCA01 [2.255 MB]

THPPC095	A Proof-of-Principle Study of a Synchronous Movement of an Undulator Array Using an EtherCAT Fieldbus at European XFEL	controls, electron, photon, software	1292
	S. Karabekyan, A. Beckmann, J. Pflüger, M. Yakopov XFEL. EU, Hamburg, Germany
	The European XFEL project is a 4th generation X-ray light source. The undulator systems SASE 1, SASE 2 and SASE 3 are used to produce photon beams. Each undulator system consists of an array of undulator cells installed in a row along the electron beam. The motion control of an undulator system is carried out by means of industrial components using an EtherCAT fieldbus. One of its features is motion synchronization for undulator cells which belong to the same system. This paper describes the technical design and software implementation of the undulator system control providing that feature. It presents the results of an on-going proof-of-principle study of synchronous movement of four undulator cells as well as study of movement synchronization between undulator and phase shifter.
	Poster THPPC095 [3.131 MB]

Paper

Title

Other Keywords

Page

MOPPC082

Automated Verification Environment for TwinCAT PLC Programs

PLC, interface, hardware, simulation

288

A. Beckmann
XFEL. EU, Hamburg, Germany

The European XFEL will have three undulator systems SASE1, SASE2, and SASE3 to produce extremely brilliant, ultra-short pulses of x-rays with wavelengths down to 0.1 nm. The undulator gap is adjustable in order to vary photon beam energy. The corresponding motion control is implemented with industrial PCs running Beckhoff TwinCAT Programmable Logic Controllers (PLCs). So far, the functionality of the PLC programs has been verified on system level with the final hardware. This is a time-consuming manual task, but may also damage the hardware in case of severe program failures. To improve the verification process of PLC programs, a test environment with simulated hardware has been set up. It uses a virtual machine to run the PLC program together with a verification program that simulates the behavior of the hardware. Test execution and result checking is automated with the help of scripts, which communicate with the verification program to stimulate the PLC program. Thus, functional verification of PLC programs is reduced to running a set of scripts, without the need to connect to real hardware and without manual effort.

Poster MOPPC082 [0.226 MB]

TUPPC052

Automation of the Wavelength Change for the FERMI Free Electron Laser

FEL, laser, electron, polarization

683

C. Scafuri, B. Diviacco
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Funding: Work supported in part by the Italian Ministry of University and Research under grants FIRB-RBAP045JF2 and FIRB-RBAP06AWK3
FERMI is a users facility based on a seeded Free Electron Laser (FEL). A unique feature of FERMI in this new class of light sources is the tunability of the emitted photon beam both in terms of wavelength and polarization. Tuning is obtained by choosing the appropriate gap and phasing of the undulators in the chain and by opportunely setting the seed laser wavelength. A series of adjustments are then necessary in order to keep constant the machine parameters and optimize the radiation characteristics. We have developed a software application, named SuperGap, which does all the calculations and coordinates the operations required to set the desired wavelength and polarization. SuperGap allows operators to perform this procedure in seconds. The speed and accuracy of the wavelength change have been largely exploited during user dedicated shifts to perform various types of scans in the experimental stations. The paper describes the algorithms and numerical techniques used by SuperGap and its architecture based on the Tango control system.

Poster TUPPC052 [1.116 MB]

TUCOCA01

XFEL Machine Protection System (MPS) Based on uTCA

linac, kicker, operation, FPGA

906

S. Karstensen, M.E. Castro Carballo, J.M. Jäger, M. Staack
DESY, Hamburg, Germany

The European X-Ray Free Electron Laser (XFEL) linear accelerator will provide an electron beam with energies of up to 17.5 GeV and will use it to generate extremely brilliant pulses of spatially coherent xrays. With a designated average beam power of up to 600 kW and beam spot sizes down to few micrometers, the machine will hold a serious damage potential. To ensure safe operation of the accelerator it is necessary to detect dangerous situations by closely monitoring beam losses and the status of critical components. This is the task of the uTCA* based machine protection system (MPS). Many design features of the system have been influenced by experience from existing facilities, particularly the Free Electron Laser in Hamburg (FLASH), which is a kind of 1:10 prototype for the XFEL. A high flexibility of the MPS is essential to guarantee a minimum downtime of the accelerator. The MPS is embedded in the DOOCS** control system.
* uTCA: Micro Telecommunications Computing Architecture
** DOOCS: Distributed Object Oriented Control System

Slides TUCOCA01 [2.255 MB]

THPPC095

A Proof-of-Principle Study of a Synchronous Movement of an Undulator Array Using an EtherCAT Fieldbus at European XFEL

controls, electron, photon, software

1292

S. Karabekyan, A. Beckmann, J. Pflüger, M. Yakopov
XFEL. EU, Hamburg, Germany

The European XFEL project is a 4th generation X-ray light source. The undulator systems SASE 1, SASE 2 and SASE 3 are used to produce photon beams. Each undulator system consists of an array of undulator cells installed in a row along the electron beam. The motion control of an undulator system is carried out by means of industrial components using an EtherCAT fieldbus. One of its features is motion synchronization for undulator cells which belong to the same system. This paper describes the technical design and software implementation of the undulator system control providing that feature. It presents the results of an on-going proof-of-principle study of synchronous movement of four undulator cells as well as study of movement synchronization between undulator and phase shifter.

Poster THPPC095 [3.131 MB]