IBIC2018 - List of Keywords (FPGA)

Paper	Title	Other Keywords	Page
MOOB04	Upgrade of the Machine Protection System Toward 1.3 MW Operation of the J-PARC Neutrino Beamline	target, proton, operation, electronics	18
	K. Sakashita, M.L. Friend, K. Nakayoshi KEK, Ibaraki, Japan Y. Koshio, S. Yamasu Okayama University, Faculty of Science, Okayama City, Japan
	The machine protection system (MPS) is one of the essential components to realize safe operation of the J-PARC neutrino beamline, where a high intensity neutrino beam for the T2K long baseline neutrino oscillation experiment is generated by striking 30GeV protons on a graphite target. The proton beam is extracted from the J-PARC main ring proton synchrotron (MR) into the primary beamline. The beamline is currently operated with 485kW MR beam power. The MR beam power is planned to be upgraded to 1.3+ MW. The neutrino production target could be damaged if the high intensity beam hits off-centered on the target, due to non-uniform thermal stress. Therefore, in order to protect the target, it is important to immediately stop the beam when the beam orbit is shifted. A new FPGA-based interlock module, with which the beam profile is calculated in real time, was recently developed and commissioned. This module reads out signals from a titanium-strip-based secondary emission profile monitor (SSEM) which is placed in the primary beamline. An overview of the upgrade plan of the MPS system and the results of an initial evaluation test of the new interlock module will be discussed.
	Slides MOOB04 [8.367 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB04
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC01	Integration of a Pilot-Tone Based BPM System Within the Global Orbit Feedback Environment of Elettra	controls, electron, feedback, Ethernet	190
	G. Brajnik, S. Bassanese, G. Cautero, S. Cleva, R. De Monte Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	In this contribution, we describe the advantages of the pilot tone compensation technique that we implemented in a new BPM prototype for Elettra 2.0. Injecting a fixed reference tone upstream of cables allows for a continuous calibration of the system, compensating the different behaviour of every channel due to thermal drifts, variations of cable properties, mismatches and tolerances of components. The system ran successfully as a drop-in substitute for a Libera Electron not only during various machine shifts, but also during a user dedicated beamtime shift for more than 10 hours, behaving in a transparent way for all the control systems and users. The equivalent RMS noise (at 10 kHz data rate) for the pilot tone position was less than 200 nm on a 19 mm vacuum chamber radius, with a long-term stability better than 1 um in a 12-hour window. Two main steps led to this important result: firstly, the development of a novel RF front end that adds the pilot tone to the signals originated by the beam, secondly, the realisation of an FPGA-based double digital receiver that demodulates both beam and pilot amplitudes, calculating the compensated X and Y positions.
	Slides TUOC01 [6.468 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC01
About •	paper received ※ 31 August 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC03	Commissioning of the Open Source Sirius BPM Electronics	electron, electronics, controls, timing	196
	S.R. Marques, G.B.M. Bruno, L.M. Russo, H.A. Silva, D.O. Tavares LNLS, Campinas, Brazil
	The new Brazilian 4th generation light source, Sirius, have already started and commissioning is planned to start in 2018. This paper will report on the manufacturing, deployment and production batch testing of the in-house developed BPM electronics. The latest performance and reliability achievements will be presented.
	Slides TUOC03 [14.606 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC03
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPA16	Signal Processing for Beam Loss Monitor System at Jefferson Lab	machine-protect, controls, detector, operation	245
	J. Yan, T.L. Allison, S. Bruhwel, W. Lu JLab, Newport News, Virginia, USA
	Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. Ion Chamber and Photomultiplier Tube (PMT) were both used for beam loss monitor in the Machine Protection System (MPS) at Jefferson Lab. The requirements of signal processing of these detectors are different, so two VME-based signal processing boards, Beam Loss Monitor (BLM) board and Ion-Chamber board, were developed. The BLM board has fast response (< 1us) and 5 decades dynamic range from 10nA to 1 mA, while the Ion-Chamber board has 8 decades dynamic range from 100 pA to 10 mA and slower response. Both of boards provide functions of machine protection and beam diagnostics, and have features of fast shutdown (FSD) interface, beam sync interface, built-in-self-test, remotely controlled bias signals, and on-board memory buffer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA16
About •	paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB13	Stability Tests with Pilot-Tone Based Elettra BPM RF Front End and Libera Electronics	electron, electronics, real-time, instrumentation	289
	M. Cargnelutti, P. Leban, M. Žnidarčič I-Tech, Solkan, Slovenia S. Bassanese, G. Brajnik, S. Cleva, R. De Monte Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Long-term stability is one of the most important properties of the BPM readout system. Recent developments on pilot tone capable front end have been tested with an established BPM readout electronics. The goal was to demonstrate the effectiveness of the pilot tone compensation to varying external conditions. Simulated cable attenuation change and temperature variation of the readout electronics were confirmed to have no major effect to position data readout. The output signals from Elettra front end (carrier frequency and pilot tone frequency) were processed by a Libera Spark with the integrated standard front end which contains several filtering, attenuation and amplification stages. Tests were repeated with a modified instrument (optimized for pilot tone) to compare the long-term stability results. Findings show the pilot tone front end enables great features like self-diagnostics and cable-fault compensation as well as small improvement in the long-term stability. Measurement resolution is in range of 10 nanometers RMS in 5 Hz bandwidth.
	Poster TUPB13 [1.223 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB13
About •	paper received ※ 31 August 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOA01	Low vs High Level Programming for FPGA	interface, operation, experiment, software	527
	J. Marjanovic DESY, Hamburg, Germany
	From their introduction in the eighties, Field-Programmable Gate Arrays (FPGAs) have grown in size and performance for several orders of magnitude. As the FPGA capabilities have grown, so have the designs. It seems that current tools and languages (VHDL and (System)Verilog) do not match the complexity required for advanced digital signal processing (DSP) systems usually found in experimental physics applications. In the last couple of years several commercial High-Level Synthesis (HLS) tools have emerged, providing a new method to implement FPGA designs, or at least some parts of it. By providing a higher level of abstraction, new tools offer a possibility to express algorithms in a way which is closer to the mathematical description. Such implementation is understood by a broader range of people, and thus minimizes the documentation and communication issues. Several examples of DSP algorithms relevant for beam instrumentation will be presented. Implementations of these algorithms with different HLS tools and traditional implementation in VHDL will be compared.
	Slides THOA01 [1.873 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-THOA01
About •	paper received ※ 04 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOA02	High-Speed Direct Sampling FMC for Beam Diagnostic and Accelerator Protection Applications	interface, timing, controls, diagnostics	534
	J. Zink, M.K. Czwalinna, M. Fenner, S. Jabłoński, J. Marjanovic, H. Schlarb DESY, Hamburg, Germany
	The rapid development in the field of digitizers is leading to Analog-to-Digital Converters (ADC) with ever higher sampling rates. Nowadays many high-speed digitizers for RF applications and radio communication are available, which can sample broadband signals, without the need of down converters. These ADCs fit perfectly into beam instrumentation and diagnostic applications, e.g. Bunch Arrival time Monitor (BAM), klystron life-time management or continuous wave synchronization. To cover all these high-frequency diagnostic applications, DESY has developed a direct sampling FMC digitizer board based on a high-speed ADC with an analog input bandwidth of 2.7 GHz. A high-speed data acquisition system capable of acquiring 2 channels at 800 MSP/s will be presented. As first model application of the versatile digitizer board is the coarse bunch arrival time diagnostics in the free electron laser FLASH at DESY.
	Slides THOA02 [5.817 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-THOA02
About •	paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOOB04

Upgrade of the Machine Protection System Toward 1.3 MW Operation of the J-PARC Neutrino Beamline

target, proton, operation, electronics

18

K. Sakashita, M.L. Friend, K. Nakayoshi
KEK, Ibaraki, Japan
Y. Koshio, S. Yamasu
Okayama University, Faculty of Science, Okayama City, Japan

The machine protection system (MPS) is one of the essential components to realize safe operation of the J-PARC neutrino beamline, where a high intensity neutrino beam for the T2K long baseline neutrino oscillation experiment is generated by striking 30GeV protons on a graphite target. The proton beam is extracted from the J-PARC main ring proton synchrotron (MR) into the primary beamline. The beamline is currently operated with 485kW MR beam power. The MR beam power is planned to be upgraded to 1.3+ MW. The neutrino production target could be damaged if the high intensity beam hits off-centered on the target, due to non-uniform thermal stress. Therefore, in order to protect the target, it is important to immediately stop the beam when the beam orbit is shifted. A new FPGA-based interlock module, with which the beam profile is calculated in real time, was recently developed and commissioned. This module reads out signals from a titanium-strip-based secondary emission profile monitor (SSEM) which is placed in the primary beamline. An overview of the upgrade plan of the MPS system and the results of an initial evaluation test of the new interlock module will be discussed.

Slides MOOB04 [8.367 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB04

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

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

TUOC01

Integration of a Pilot-Tone Based BPM System Within the Global Orbit Feedback Environment of Elettra

controls, electron, feedback, Ethernet

190

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

In this contribution, we describe the advantages of the pilot tone compensation technique that we implemented in a new BPM prototype for Elettra 2.0. Injecting a fixed reference tone upstream of cables allows for a continuous calibration of the system, compensating the different behaviour of every channel due to thermal drifts, variations of cable properties, mismatches and tolerances of components. The system ran successfully as a drop-in substitute for a Libera Electron not only during various machine shifts, but also during a user dedicated beamtime shift for more than 10 hours, behaving in a transparent way for all the control systems and users. The equivalent RMS noise (at 10 kHz data rate) for the pilot tone position was less than 200 nm on a 19 mm vacuum chamber radius, with a long-term stability better than 1 um in a 12-hour window. Two main steps led to this important result: firstly, the development of a novel RF front end that adds the pilot tone to the signals originated by the beam, secondly, the realisation of an FPGA-based double digital receiver that demodulates both beam and pilot amplitudes, calculating the compensated X and Y positions.

Slides TUOC01 [6.468 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC01

About •

paper received ※ 31 August 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

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

TUOC03

Commissioning of the Open Source Sirius BPM Electronics

electron, electronics, controls, timing

196

S.R. Marques, G.B.M. Bruno, L.M. Russo, H.A. Silva, D.O. Tavares
LNLS, Campinas, Brazil

The new Brazilian 4th generation light source, Sirius, have already started and commissioning is planned to start in 2018. This paper will report on the manufacturing, deployment and production batch testing of the in-house developed BPM electronics. The latest performance and reliability achievements will be presented.

Slides TUOC03 [14.606 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC03

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

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

TUPA16

Signal Processing for Beam Loss Monitor System at Jefferson Lab

machine-protect, controls, detector, operation

245

J. Yan, T.L. Allison, S. Bruhwel, W. Lu
JLab, Newport News, Virginia, USA

Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
Ion Chamber and Photomultiplier Tube (PMT) were both used for beam loss monitor in the Machine Protection System (MPS) at Jefferson Lab. The requirements of signal processing of these detectors are different, so two VME-based signal processing boards, Beam Loss Monitor (BLM) board and Ion-Chamber board, were developed. The BLM board has fast response (< 1us) and 5 decades dynamic range from 10nA to 1 mA, while the Ion-Chamber board has 8 decades dynamic range from 100 pA to 10 mA and slower response. Both of boards provide functions of machine protection and beam diagnostics, and have features of fast shutdown (FSD) interface, beam sync interface, built-in-self-test, remotely controlled bias signals, and on-board memory buffer.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA16

About •

paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

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

TUPB13

Stability Tests with Pilot-Tone Based Elettra BPM RF Front End and Libera Electronics

electron, electronics, real-time, instrumentation

289

M. Cargnelutti, P. Leban, M. Žnidarčič
I-Tech, Solkan, Slovenia
S. Bassanese, G. Brajnik, S. Cleva, R. De Monte
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Long-term stability is one of the most important properties of the BPM readout system. Recent developments on pilot tone capable front end have been tested with an established BPM readout electronics. The goal was to demonstrate the effectiveness of the pilot tone compensation to varying external conditions. Simulated cable attenuation change and temperature variation of the readout electronics were confirmed to have no major effect to position data readout. The output signals from Elettra front end (carrier frequency and pilot tone frequency) were processed by a Libera Spark with the integrated standard front end which contains several filtering, attenuation and amplification stages. Tests were repeated with a modified instrument (optimized for pilot tone) to compare the long-term stability results. Findings show the pilot tone front end enables great features like self-diagnostics and cable-fault compensation as well as small improvement in the long-term stability. Measurement resolution is in range of 10 nanometers RMS in 5 Hz bandwidth.

Poster TUPB13 [1.223 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB13

About •

paper received ※ 31 August 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

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

THOA01

Low vs High Level Programming for FPGA

interface, operation, experiment, software

527

J. Marjanovic
DESY, Hamburg, Germany

From their introduction in the eighties, Field-Programmable Gate Arrays (FPGAs) have grown in size and performance for several orders of magnitude. As the FPGA capabilities have grown, so have the designs. It seems that current tools and languages (VHDL and (System)Verilog) do not match the complexity required for advanced digital signal processing (DSP) systems usually found in experimental physics applications. In the last couple of years several commercial High-Level Synthesis (HLS) tools have emerged, providing a new method to implement FPGA designs, or at least some parts of it. By providing a higher level of abstraction, new tools offer a possibility to express algorithms in a way which is closer to the mathematical description. Such implementation is understood by a broader range of people, and thus minimizes the documentation and communication issues. Several examples of DSP algorithms relevant for beam instrumentation will be presented. Implementations of these algorithms with different HLS tools and traditional implementation in VHDL will be compared.

Slides THOA01 [1.873 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-THOA01

About •

paper received ※ 04 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

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

THOA02

High-Speed Direct Sampling FMC for Beam Diagnostic and Accelerator Protection Applications

interface, timing, controls, diagnostics

534

J. Zink, M.K. Czwalinna, M. Fenner, S. Jabłoński, J. Marjanovic, H. Schlarb
DESY, Hamburg, Germany

The rapid development in the field of digitizers is leading to Analog-to-Digital Converters (ADC) with ever higher sampling rates. Nowadays many high-speed digitizers for RF applications and radio communication are available, which can sample broadband signals, without the need of down converters. These ADCs fit perfectly into beam instrumentation and diagnostic applications, e.g. Bunch Arrival time Monitor (BAM), klystron life-time management or continuous wave synchronization. To cover all these high-frequency diagnostic applications, DESY has developed a direct sampling FMC digitizer board based on a high-speed ADC with an analog input bandwidth of 2.7 GHz. A high-speed data acquisition system capable of acquiring 2 channels at 800 MSP/s will be presented. As first model application of the versatile digitizer board is the coarse bunch arrival time diagnostics in the free electron laser FLASH at DESY.

Slides THOA02 [5.817 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-THOA02

About •

paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

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