PCaPAC2018 - List of Keywords (laser)

Paper	Title	Other Keywords	Page
THP12	Upgrading the Synchronisation and Trigger Systems on the Vulcan High-Power Nd:glass Laser	timing, fibre-optics, experiment, operation	187
	D.A. Pepler, I. O. Musgrave, P.B.M. Oliveira STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
	The Vulcan Neodymium-Glass High-Power Laser Facility at the Central Laser Facility in the UK has been operational for over 40 years providing a world-leading and high-profile service to International researchers in the field of Plasma Physics. Over that time the Facility has had many modifications and enhancements to the buildings, the laser hardware and to the computerised control, synchronisation and timing systems. As the laser systems have developed and the user experiments have continued to become much more complex and demanding, many new operational conditions have been required. The use of four independent laser oscillators with different properties - including temporal, spectral and operating frequencies - have meant that the optical and electrical multiplexing and the timing and synchronisation systems have all had to be adapted and extended to cope with these additional needs. However, these changes have resulted in the build-up of the overall system jitter to ± 250 ps between long (ns) and short (ps) optical pulses and this is a limiting factor for time-critical experiments. This paper will present some of the key changes and improvements that have recently been made.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THP12
About •	paper received ※ 27 September 2018 paper accepted ※ 15 October 2018 issue date ※ 21 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP19	Timing System for Multiple Accelerator Rings at KEK e⁺/e⁻ Injector LINAC	linac, timing, injection, gun	207
	F. Miyahara, K. Furukawa, H. Kaji, M. Satoh, H. Sugimura KEK, Ibaraki, Japan T. Kudo, S. Kusano Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan H.S. Saotome Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
	The KEK e⁺/e⁻ injector linac is operated in multiple modes that can be switched every 20 ms for e⁺/e⁻ beam injection to five different accelerator rings, SuperKEKB High Energy Ring (HER), Photon Factory (PF) ring, PF-AR, positron damping ring (DR) and SuperKEKB Low Energy Ring (LER). The MRF event system which consists of event generators (EVG) and event receivers (EVR) is used to distribute event codes that correspond to beam modes and data buffer. The EVR generates various trigger timing signals depending on the event code. The data buffer incudes some important parameters such as HER/PDR injection RF bucket, setting currents of pulsed quad/steering magnets that enables multiple beam injection. The event system uses the linac main clock (114.2 MHz) which synchronized to HER/LER, but due to PF and PF-AR rings are not synchronized to the linac, an additional synchronization system is employed for those rings. We will describe the timing and synchronization system to fulfill multiple injections to independent rings and report status of the system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THP19
About •	paper received ※ 17 October 2018 paper accepted ※ 17 October 2018 issue date ※ 21 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRCB1	Ultra Fast Data Acquisition in ELI Beamlines	interface, FPGA, controls, data-acquisition	230
	P. Bastl Institute of Physics of the ASCR, Prague, Czech Republic V. Gaman, O. Janda, P. Pivonka, B. Plötzeneder, J. Sys, J. Trdlicka ELI-BEAMS, Prague, Czech Republic
	The ELI Beamlines facility is a Petawatt laser facility in the final construction and commissioning phase in Czech Republic. In fully operation phase, four lasers will be used to control beamlines in six experimental halls. In this paper we describe Ultra fast and distributed data acquisition system as was defined in ELI Beamlines. The data acquisition system is divided into two levels: central and local level. The central level data acquisition system defines a special Tier 0 RAM buffer. This buffer is based on special multi node data acquisition server which shares memory of all its nodes into one continuous space over low latency network technologies (Mellanox Infinband/Intel OmniPath). The main role of the Tier 0 buffer is to acquire first bunch and provide load balancing of incoming data. These data comes from many sources distributed along the experimental technologies. The local data acquisition system is then responsible for connection of local detectors to central data acquisition server through ROCE interface. The connection is done directly when supported or indirectly using local data acquisition computers (for PCIe etc.).
	Slides FRCB1 [1.830 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-FRCB1
About •	paper received ※ 10 October 2018 paper accepted ※ 15 October 2018 issue date ※ 21 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

THP12

Upgrading the Synchronisation and Trigger Systems on the Vulcan High-Power Nd:glass Laser

timing, fibre-optics, experiment, operation

187

D.A. Pepler, I. O. Musgrave, P.B.M. Oliveira
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom

The Vulcan Neodymium-Glass High-Power Laser Facility at the Central Laser Facility in the UK has been operational for over 40 years providing a world-leading and high-profile service to International researchers in the field of Plasma Physics. Over that time the Facility has had many modifications and enhancements to the buildings, the laser hardware and to the computerised control, synchronisation and timing systems. As the laser systems have developed and the user experiments have continued to become much more complex and demanding, many new operational conditions have been required. The use of four independent laser oscillators with different properties - including temporal, spectral and operating frequencies - have meant that the optical and electrical multiplexing and the timing and synchronisation systems have all had to be adapted and extended to cope with these additional needs. However, these changes have resulted in the build-up of the overall system jitter to ± 250 ps between long (ns) and short (ps) optical pulses and this is a limiting factor for time-critical experiments. This paper will present some of the key changes and improvements that have recently been made.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THP12

About •

paper received ※ 27 September 2018 paper accepted ※ 15 October 2018 issue date ※ 21 January 2019

Export •

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

THP19

Timing System for Multiple Accelerator Rings at KEK e⁺/e⁻ Injector LINAC

linac, timing, injection, gun

207

F. Miyahara, K. Furukawa, H. Kaji, M. Satoh, H. Sugimura
KEK, Ibaraki, Japan
T. Kudo, S. Kusano
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
H.S. Saotome
Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan

The KEK e⁺/e⁻ injector linac is operated in multiple modes that can be switched every 20 ms for e⁺/e⁻ beam injection to five different accelerator rings, SuperKEKB High Energy Ring (HER), Photon Factory (PF) ring, PF-AR, positron damping ring (DR) and SuperKEKB Low Energy Ring (LER). The MRF event system which consists of event generators (EVG) and event receivers (EVR) is used to distribute event codes that correspond to beam modes and data buffer. The EVR generates various trigger timing signals depending on the event code. The data buffer incudes some important parameters such as HER/PDR injection RF bucket, setting currents of pulsed quad/steering magnets that enables multiple beam injection. The event system uses the linac main clock (114.2 MHz) which synchronized to HER/LER, but due to PF and PF-AR rings are not synchronized to the linac, an additional synchronization system is employed for those rings. We will describe the timing and synchronization system to fulfill multiple injections to independent rings and report status of the system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THP19

About •

paper received ※ 17 October 2018 paper accepted ※ 17 October 2018 issue date ※ 21 January 2019

Export •

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

FRCB1

Ultra Fast Data Acquisition in ELI Beamlines

interface, FPGA, controls, data-acquisition

230

P. Bastl
Institute of Physics of the ASCR, Prague, Czech Republic
V. Gaman, O. Janda, P. Pivonka, B. Plötzeneder, J. Sys, J. Trdlicka
ELI-BEAMS, Prague, Czech Republic

The ELI Beamlines facility is a Petawatt laser facility in the final construction and commissioning phase in Czech Republic. In fully operation phase, four lasers will be used to control beamlines in six experimental halls. In this paper we describe Ultra fast and distributed data acquisition system as was defined in ELI Beamlines. The data acquisition system is divided into two levels: central and local level. The central level data acquisition system defines a special Tier 0 RAM buffer. This buffer is based on special multi node data acquisition server which shares memory of all its nodes into one continuous space over low latency network technologies (Mellanox Infinband/Intel OmniPath). The main role of the Tier 0 buffer is to acquire first bunch and provide load balancing of incoming data. These data comes from many sources distributed along the experimental technologies. The local data acquisition system is then responsible for connection of local detectors to central data acquisition server through ROCE interface. The connection is done directly when supported or indirectly using local data acquisition computers (for PCIe etc.).

Slides FRCB1 [1.830 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-FRCB1

About •

paper received ※ 10 October 2018 paper accepted ※ 15 October 2018 issue date ※ 21 January 2019

Export •

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