IBIC2016 - List of Keywords (FPGA)

Paper	Title	Other Keywords	Page
MOPG07	First Operational Experience with the LHC Diode ORbit and OScillation (DOROS) System	detector, electronics, embedded, coupling	43
	M. Gąsior, G. Baud, J. Olexa, G. Valentino CERN, Geneva, Switzerland
	The LHC started high-energy operation in 2015 with new tertiary collimators, equipped with beam position monitors embedded in their jaws. The required resolution and stability of the beam orbit measurements linked to these BPMs were addressed by the development of a new Diode ORbit and OScillation (DOROS) system. DOROS converts the short BPM electrode pulses into slowly varying signals by compensated diode detectors, whose output signals can be precisely processed and acquired with 24-bit ADCs. This scheme allows a sub-micrometre orbit resolution to be achieved with robust and relatively simple hardware. The DOROS system is also equipped with dedicated channels optimised for processing beam oscillation signals. Data from these channels can be used to perform betatron coupling and beta-beating measurements. The achieved performance of the DOROS system triggered its installation on the beam position monitors located next to the LHC experiments for testing the system as an option of improving the beam orbit measurement in the most important LHC locations. After introducing the DOROS system, its performance is discussed through both, beam and laboratory measurements.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG07
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MOPG25	Industrialisation of Cavity BPMs	cavity, electronics, simulation, controls	98
	E. Yamakawa, S.T. Boogert, A. Lyapin JAI, Egham, Surrey, United Kingdom S. Syme FMB Oxford, Oxford, United Kingdom
	The industrialisation project of a cavity beam position monitor (CBPM) has been commissioned aiming at providing reliable and economical CBPM systems for future Free Electron Lasers (FEL) and similar linac-based facilities. The first prototype of a CBPM system was built at Versatile Electron Linear Accelerator (VELA) in Daresbury Laboratory. We report on the measurement results from the first prototype of our system at VELA and current developments of CBPMs, down-converter electronics and DAQ system.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG25
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MOPG39	Upgrade of the LHC Bunch by Bunch Intensity Measurement Acquisition System	real-time, acceleration, proton, interface	135
	D. Belohrad, D. Esperante Pereira, J. Kral, S.B. Pedersen CERN, Geneva, Switzerland
	The fast beam intensity measurement systems for the LHC currently use an analogue signal processing chain to provide the charge information for individual bunches. This limits the possibility to use higher level correction algorithms to remove systematic measurement errors coming from the beam current transformer and the associated analogue electronics chain. In addition, the current measurement system requires individual settings for different types of beams, implying the need for continuous tuning during LHC operation. Using modern technology, the analogue measurement chain can be replaced by an entirely digital acquisition system, even in a case of the short, pulsed signals produced by the LHC beams. This paper discusses the implementation of the new digital acquisition system and the calculations required to reconstruct the individual LHC bunch intensities, along with the presentation of results from actual beam measurements.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG39
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TUCL03	Measurements of Longitudinal Coupled Bunch Instabilities and Status of New Feedback System	feedback, damping, interface, kicker	298
	G. Rehm, M.G. Abbott, A.F.D. Morgan DLS, Oxfordshire, United Kingdom
	We have modified the vertical bunch-by-bunch feedback to also provide a longitudinal kick on a separate input. Using our existing drive/damp system and a modulator/amplifier to the required 1.5 GHz we are thus able to characterise the damping rates of all coupled bunch instabilities, while not able to provide feedback. At the same time, we have started the development of a completely new longitudinal feedback system based on commercially available components, providing 500MS/s, 14 bit conversion in and out, powerful Virtex 7 field programmable gate array for digital signal processing and 32GB of on board buffer for recording data. We report on the status of the development and our plans to bring the new system into use.
	Slides TUCL03 [2.897 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUCL03
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TUPG02	A Novel Electron-BPM Front End With Sub-Micron Resolution Based on Pilot-Tone Compensation: Test Results With Beam	storage-ring, pick-up, factory, electron	307
	G. Brajnik, S. Carrato University of Trieste, Trieste, Italy S. Bassanese, G. Cautero, R. De Monte Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	In this paper we present a novel and original four channel front-end developed for a beam position monitor (BPM) system. In this work, we demonstrate for the first time the continuous calibration of the system using a pilot tone for both beam current dependency and thermal drift compensation, eliminating the need for thermoregulation. By using this original approach, we were also able to investigate several odd and well-known behaviours of BPM systems; the influence of important issues, like the non-linearity of ADCs and the gain compression of amplifiers which do affect the reliability of the measurement, have been fully understood. To achieve these results, we developed a new radio frequency front-end that combines the four pick-up signals originated by the beam with a stable and programmable tone, generated within the readout system. The signals from a button BPM of Elettra storage ring, have been acquired with a 16 bit - 160MS/s digitizer controlled by a CPU that evaluates the acquired data and applies the correction factor of the pilot tone. A final resolution equal to 1.0um, on a 20mm average radius vacuum chamber, has been measured with a long-term stability less than 1um.
	Poster TUPG02 [3.671 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG02
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TUPG03	Accurate Bunch Resolved BPM System	storage-ring, operation, detector, diagnostics	311
	F. Falkenstern, F. Hoffmann, J. Kuszynski, M. Ries HZB, Berlin, Germany
	Operation with multiple beams stored on different orbits in storage rings as well as beam dynamics studies requires accurate and stable Beam Position Monitor (BPM) measurements for each individual bunch. Analog BPM systems are usually optimized for measuring the closed orbit, i.e. averaging over all buckets and many turns. Therefore no information about the position of individual bunches are supplied. The new bunch resolved BPM electronic, currently under development at HZB, is based on the analysis of RF-signals delivered by a set of four stripline / pick-up electrodes in each beam position monitor. It has a high spatial resolution over a wide range of bunch currents. Using the four well matched (phase and amplitude) bunch induced RF-signals in combination with a low jitter master clock and commercial data acquisition cards allow beam position measurements on a bunch to bunch basis with micrometer resolution. Experimental results obtained at BESSY II and MLS demonstrates the achieved performance of the setup and will be discussed in detail.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG03
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WEAL03	Diagnostic Data Acquisition Strategies at FRIB	diagnostics, hardware, software, data-acquisition	572
	S. Cogan, S.M. Lidia, R.C. Webber FRIB, East Lansing, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. Strategies for data acquisition and processing will be discussed in the context of the Facility for Rare Isotope Beams (FRIB). Design decisions include selecting and designing electronics hardware, data acquisition cards, firmware design, and how to integrate with EPICS control system. With over 300 diagnostic devices and 16 unique types of devices, timing for synchronous data acquisition is important. Strategies to accelerate development as well as reduce maintenance requirements will be dis-cussed, including using common hardware and firmware whenever possible, and defining a common data report-ing structure for use by most devices. MicroTCA.4 plat-form is used to integrate data acquisition cards, distribute timing information, and machine protection signals.
	Slides WEAL03 [7.392 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEAL03
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WEPG07	A Heterogeneous FPGA/GPU Architecture for Real-Time Data Analysis and Fast Feedback Systems	GPU, monitoring, detector, data-analysis	626
	M. Vogelgesang, L.E. Ardila Perez, M. Caselle, S.A. Chilingaryan, A. Kopmann, L. Rota, M. Weber KIT, Eggenstein-Leopoldshafen, Germany
	We propose a versatile and modular approach for a real-time data acquisition and evaluation system used for monitoring and feedback control in beam diagnostic and photon science experiments. Our hybrid architecture is based on an FPGA readout card* and a GPU for data processing. To increase throughput, lower latencies and reduce overall system strain, the FPGA write data directly in the GPU. After real-time data analysis the GPU writes back results either directly to the FPGA in case of fast feedback systems or to the CPU host system for storage. Communication and scheduling are handled transparently by our processing framework*. However, users can customize and extend it with their own processing plugins. Although the system is designed for real-time purposes, the modular approach also allows standalone usage for high-speed off-line analysis. We evaluated the performance of our solution measuring both processing times of data analysis algorithms used with beam instrumentation detectors as well as transfer times between FPGA and GPU. The latter suggests throughputs of up to 6.5 GB/s with latencies down to tens of microseconds, thus making it suitable for fast feedback systems. A PCIe DMA Architecture for Multi-Gigabyte Per Second Data Transmission, 10.1109/TNS.2015.2426877 ** A Scalable GPU-based Image Processing Framework for On-line Monitoring, 10.1109/HPCC.2012.116
	Poster WEPG07 [17.144 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG07
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WEPG15	A FPGA Based Common Platform for LCLS2 Beam Diagnostics and Controls	network, timing, hardware, controls	650
	J.C. Frisch, R. Claus, J.M. D'Ewart, G. Haller, R.T. Herbst, B. Hong, U. Legat, L. Ma, J.J. Olsen, B.A. Reese, R. Ruckman, L. Sapozhnikov, S.R. Smith, T. Straumann, D. Van Winkle, J.A. Vásquez, M. Weaver, E. Williams, C. Xu, A. Young SLAC, Menlo Park, California, USA
	Funding: work supported by Department of Energy contract DE-AC02-76SF00515 The LCLS2 is a CW superconducting LINAC driven X-ray free electron laser under construction at SLAC. The high beam rate of up to 1MHz, and ability to deliver electrons to multiple undulators and beam dumps, results in a beam diagnostics and control system that requires real time data processing in programmable logic. The SLAC Technical Innovation Directorate has developed a common hardware and firmware platform for beam instrumentation based on the ATCA crate format. The FPGAs are located on ATCA carrier cards, front ends and A-D / D-A are on AMC cards that are connected to the carriers by high speed serial JESD links. External communication is through the ATCA backplane, with interlocks and low frequency components on the ATCA RTM. This platform is used for a variety of high speed diagnostics including stripline and cavity BPMs.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG15
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WEPG17	BATCH APPLICATIONS OF DIGITAL BPM PROCESSORS FROM THE SINAP	cavity, hardware, interface, FEL	658
	L.W. Lai, F.Z. Chen, Z.C. Chen, Y.B. Leng, Y.B. Yan, W.M. Zhou SSRF, Shanghai, People's Republic of China J. Chen SINAP, Shanghai, People's Republic of China
	Funding: Work supported by National Natural Science Foundation (No.11305253, 11575282) During the past several years a digital BPM (DBPM) processor has been developed at the SINAP. After continuous development and optimization, the processor has been finalized and has come to batch application on the signal processing of cavity BPMs and stripline BPMs at the Dalian Coherent Light Source (DCLS) and the Shanghai Soft X-ray FEL (SXFEL). Tests have been done to evaluate the performances, such as the noise level, the SNR and the cross talk. The system resolution of the cavity and stripline BPMs can achieve 1um and 10um respectively. The test results on the Shanghai Deep-Ultra-Violet (SDUV) and the DCLS will be introduced.
	Poster WEPG17 [6.500 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG17
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPG07

First Operational Experience with the LHC Diode ORbit and OScillation (DOROS) System

detector, electronics, embedded, coupling

43

M. Gąsior, G. Baud, J. Olexa, G. Valentino
CERN, Geneva, Switzerland

The LHC started high-energy operation in 2015 with new tertiary collimators, equipped with beam position monitors embedded in their jaws. The required resolution and stability of the beam orbit measurements linked to these BPMs were addressed by the development of a new Diode ORbit and OScillation (DOROS) system. DOROS converts the short BPM electrode pulses into slowly varying signals by compensated diode detectors, whose output signals can be precisely processed and acquired with 24-bit ADCs. This scheme allows a sub-micrometre orbit resolution to be achieved with robust and relatively simple hardware. The DOROS system is also equipped with dedicated channels optimised for processing beam oscillation signals. Data from these channels can be used to perform betatron coupling and beta-beating measurements. The achieved performance of the DOROS system triggered its installation on the beam position monitors located next to the LHC experiments for testing the system as an option of improving the beam orbit measurement in the most important LHC locations. After introducing the DOROS system, its performance is discussed through both, beam and laboratory measurements.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG07

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MOPG25

Industrialisation of Cavity BPMs

cavity, electronics, simulation, controls

98

E. Yamakawa, S.T. Boogert, A. Lyapin
JAI, Egham, Surrey, United Kingdom
S. Syme
FMB Oxford, Oxford, United Kingdom

The industrialisation project of a cavity beam position monitor (CBPM) has been commissioned aiming at providing reliable and economical CBPM systems for future Free Electron Lasers (FEL) and similar linac-based facilities. The first prototype of a CBPM system was built at Versatile Electron Linear Accelerator (VELA) in Daresbury Laboratory. We report on the measurement results from the first prototype of our system at VELA and current developments of CBPMs, down-converter electronics and DAQ system.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG25

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

MOPG39

Upgrade of the LHC Bunch by Bunch Intensity Measurement Acquisition System

real-time, acceleration, proton, interface

135

D. Belohrad, D. Esperante Pereira, J. Kral, S.B. Pedersen
CERN, Geneva, Switzerland

The fast beam intensity measurement systems for the LHC currently use an analogue signal processing chain to provide the charge information for individual bunches. This limits the possibility to use higher level correction algorithms to remove systematic measurement errors coming from the beam current transformer and the associated analogue electronics chain. In addition, the current measurement system requires individual settings for different types of beams, implying the need for continuous tuning during LHC operation. Using modern technology, the analogue measurement chain can be replaced by an entirely digital acquisition system, even in a case of the short, pulsed signals produced by the LHC beams. This paper discusses the implementation of the new digital acquisition system and the calculations required to reconstruct the individual LHC bunch intensities, along with the presentation of results from actual beam measurements.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG39

Export •

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

TUCL03

Measurements of Longitudinal Coupled Bunch Instabilities and Status of New Feedback System

feedback, damping, interface, kicker

298

G. Rehm, M.G. Abbott, A.F.D. Morgan
DLS, Oxfordshire, United Kingdom

We have modified the vertical bunch-by-bunch feedback to also provide a longitudinal kick on a separate input. Using our existing drive/damp system and a modulator/amplifier to the required 1.5 GHz we are thus able to characterise the damping rates of all coupled bunch instabilities, while not able to provide feedback. At the same time, we have started the development of a completely new longitudinal feedback system based on commercially available components, providing 500MS/s, 14 bit conversion in and out, powerful Virtex 7 field programmable gate array for digital signal processing and 32GB of on board buffer for recording data. We report on the status of the development and our plans to bring the new system into use.

Slides TUCL03 [2.897 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUCL03

Export •

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

TUPG02

A Novel Electron-BPM Front End With Sub-Micron Resolution Based on Pilot-Tone Compensation: Test Results With Beam

storage-ring, pick-up, factory, electron

307

G. Brajnik, S. Carrato
University of Trieste, Trieste, Italy
S. Bassanese, G. Cautero, R. De Monte
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

In this paper we present a novel and original four channel front-end developed for a beam position monitor (BPM) system. In this work, we demonstrate for the first time the continuous calibration of the system using a pilot tone for both beam current dependency and thermal drift compensation, eliminating the need for thermoregulation. By using this original approach, we were also able to investigate several odd and well-known behaviours of BPM systems; the influence of important issues, like the non-linearity of ADCs and the gain compression of amplifiers which do affect the reliability of the measurement, have been fully understood. To achieve these results, we developed a new radio frequency front-end that combines the four pick-up signals originated by the beam with a stable and programmable tone, generated within the readout system. The signals from a button BPM of Elettra storage ring, have been acquired with a 16 bit - 160MS/s digitizer controlled by a CPU that evaluates the acquired data and applies the correction factor of the pilot tone. A final resolution equal to 1.0um, on a 20mm average radius vacuum chamber, has been measured with a long-term stability less than 1um.

Poster TUPG02 [3.671 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG02

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TUPG03

Accurate Bunch Resolved BPM System

storage-ring, operation, detector, diagnostics

311

F. Falkenstern, F. Hoffmann, J. Kuszynski, M. Ries
HZB, Berlin, Germany

Operation with multiple beams stored on different orbits in storage rings as well as beam dynamics studies requires accurate and stable Beam Position Monitor (BPM) measurements for each individual bunch. Analog BPM systems are usually optimized for measuring the closed orbit, i.e. averaging over all buckets and many turns. Therefore no information about the position of individual bunches are supplied. The new bunch resolved BPM electronic, currently under development at HZB, is based on the analysis of RF-signals delivered by a set of four stripline / pick-up electrodes in each beam position monitor. It has a high spatial resolution over a wide range of bunch currents. Using the four well matched (phase and amplitude) bunch induced RF-signals in combination with a low jitter master clock and commercial data acquisition cards allow beam position measurements on a bunch to bunch basis with micrometer resolution. Experimental results obtained at BESSY II and MLS demonstrates the achieved performance of the setup and will be discussed in detail.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG03

Export •

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

WEAL03

Diagnostic Data Acquisition Strategies at FRIB

diagnostics, hardware, software, data-acquisition

572

S. Cogan, S.M. Lidia, R.C. Webber
FRIB, East Lansing, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
Strategies for data acquisition and processing will be discussed in the context of the Facility for Rare Isotope Beams (FRIB). Design decisions include selecting and designing electronics hardware, data acquisition cards, firmware design, and how to integrate with EPICS control system. With over 300 diagnostic devices and 16 unique types of devices, timing for synchronous data acquisition is important. Strategies to accelerate development as well as reduce maintenance requirements will be dis-cussed, including using common hardware and firmware whenever possible, and defining a common data report-ing structure for use by most devices. MicroTCA.4 plat-form is used to integrate data acquisition cards, distribute timing information, and machine protection signals.

Slides WEAL03 [7.392 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEAL03

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

WEPG07

A Heterogeneous FPGA/GPU Architecture for Real-Time Data Analysis and Fast Feedback Systems

GPU, monitoring, detector, data-analysis

626

M. Vogelgesang, L.E. Ardila Perez, M. Caselle, S.A. Chilingaryan, A. Kopmann, L. Rota, M. Weber
KIT, Eggenstein-Leopoldshafen, Germany

We propose a versatile and modular approach for a real-time data acquisition and evaluation system used for monitoring and feedback control in beam diagnostic and photon science experiments. Our hybrid architecture is based on an FPGA readout card* and a GPU for data processing. To increase throughput, lower latencies and reduce overall system strain, the FPGA write data directly in the GPU. After real-time data analysis the GPU writes back results either directly to the FPGA in case of fast feedback systems or to the CPU host system for storage. Communication and scheduling are handled transparently by our processing framework**. However, users can customize and extend it with their own processing plugins. Although the system is designed for real-time purposes, the modular approach also allows standalone usage for high-speed off-line analysis. We evaluated the performance of our solution measuring both processing times of data analysis algorithms used with beam instrumentation detectors as well as transfer times between FPGA and GPU. The latter suggests throughputs of up to 6.5 GB/s with latencies down to tens of microseconds, thus making it suitable for fast feedback systems.
* A PCIe DMA Architecture for Multi-Gigabyte Per Second Data Transmission, 10.1109/TNS.2015.2426877
** A Scalable GPU-based Image Processing Framework for On-line Monitoring, 10.1109/HPCC.2012.116

Poster WEPG07 [17.144 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG07

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WEPG15

A FPGA Based Common Platform for LCLS2 Beam Diagnostics and Controls

network, timing, hardware, controls

650

J.C. Frisch, R. Claus, J.M. D'Ewart, G. Haller, R.T. Herbst, B. Hong, U. Legat, L. Ma, J.J. Olsen, B.A. Reese, R. Ruckman, L. Sapozhnikov, S.R. Smith, T. Straumann, D. Van Winkle, J.A. Vásquez, M. Weaver, E. Williams, C. Xu, A. Young
SLAC, Menlo Park, California, USA

Funding: work supported by Department of Energy contract DE-AC02-76SF00515
The LCLS2 is a CW superconducting LINAC driven X-ray free electron laser under construction at SLAC. The high beam rate of up to 1MHz, and ability to deliver electrons to multiple undulators and beam dumps, results in a beam diagnostics and control system that requires real time data processing in programmable logic. The SLAC Technical Innovation Directorate has developed a common hardware and firmware platform for beam instrumentation based on the ATCA crate format. The FPGAs are located on ATCA carrier cards, front ends and A-D / D-A are on AMC cards that are connected to the carriers by high speed serial JESD links. External communication is through the ATCA backplane, with interlocks and low frequency components on the ATCA RTM. This platform is used for a variety of high speed diagnostics including stripline and cavity BPMs.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG15

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

WEPG17

BATCH APPLICATIONS OF DIGITAL BPM PROCESSORS FROM THE SINAP

cavity, hardware, interface, FEL

658

L.W. Lai, F.Z. Chen, Z.C. Chen, Y.B. Leng, Y.B. Yan, W.M. Zhou
SSRF, Shanghai, People's Republic of China
J. Chen
SINAP, Shanghai, People's Republic of China

Funding: Work supported by National Natural Science Foundation (No.11305253, 11575282)
During the past several years a digital BPM (DBPM) processor has been developed at the SINAP. After continuous development and optimization, the processor has been finalized and has come to batch application on the signal processing of cavity BPMs and stripline BPMs at the Dalian Coherent Light Source (DCLS) and the Shanghai Soft X-ray FEL (SXFEL). Tests have been done to evaluate the performances, such as the noise level, the SNR and the cross talk. The system resolution of the cavity and stripline BPMs can achieve 1um and 10um respectively. The test results on the Shanghai Deep-Ultra-Violet (SDUV) and the DCLS will be introduced.

Poster WEPG17 [6.500 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG17

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