IPAC2016 - List of Keywords (embedded)

Paper	Title	Other Keywords	Page
MOOCB03	Distributed Matching Scheme and a Deterministic Flexible Matching Algorithm for Arbitrary Systems	distributed, controls, optics, quadrupole	65
	Y.-C. Chao SLAC, Menlo Park, California, USA Y.-C. Chao TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Paradigm complementary to conventional matching is explored, with matching distributed across the entire line. This can have varying degrees of advantage depending on acuteness of issues in a conventional scheme: - Limited flexibility and space constraint for matching section - Neglect of beam property away from matching section - Excessive envelope/magnet strength caused by matching (sub-optimal tradeoff) - Local envelope blowup inside matching section - Low tolerance to errors and lack of recourse to matching failure - Slow computation process - Unpredictable solution - Limited option/insight/control on implementing solution. A scheme was envisioned to address these, backed by recently developed matching algorithm tailored to this demand. It can be applied to any beamline configuration, including coupled 4D or intervening elements, providing deterministic, rigorous solutions allowing insight and control pre-implementation. It also shows promise of global optimum. Combined with the distributed scheme this algorithm promises additional advantages of speed, determinism and flexibility. Preliminary results, computational demands and possibilities for extension will be discussed.
	Slides MOOCB03 [10.412 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOOCB03
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MOPOR010	Impedance Measurements and Simulations on the TCTP and TDI LHC Collimators	impedance, HOM, simulation, operation	610
	N. Biancacci, F. Caspers, A. Grudiev, J. Kuczerowski, I. Lamas Garcia, A. Lechner, E. Métral, A. Passarelli, A. Perillo Marcone, B. Salvant, J.A. Uythoven CERN, Geneva, Switzerland O. Frasciello, M. Zobov INFN/LNF, Frascati (Roma), Italy A. Mostacci Rome University La Sapienza, Roma, Italy N. Mounet EPFL, Lausanne, Switzerland
	The LHC collimation system is a critical element for the safe operation of the LHC machine and is subject to continuous performance monitoring, hardware upgrade and optimization. In this work we will address the impact on impedance of the upgrades performed on the TDI injection protection collimator, where the absorber material has been changed to mitigate the device heating observed in machine operation, and on selected secondary (TCS) and tertiary (TCT) collimators, where beam position monitors (BPM) have been embedded for faster jaw alignment. Concerning the TDI, we will present the RF measurements performed before and after the upgrade, comparing the result to heating and tune shift beam measurements. For the TCTs, we will study how the higher order modes (HOM) introduced by the BPM addition have been cured by means of ferrite placement in the device. The impedance mitigation campaign has been supported by RF measurements whose results are in good agreement with GdfidL and CST simulations. The presence of undamped low frequency modes is proved not to be detrimental to the safe LHC operation.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR010
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WEPMW034	First Operational Experience with Embedded Collimator BPMs in the LHC	alignment, collimation, pick-up, interlocks	2510
	G. Valentino, G. Baud, R. Bruce, M. Gąsior, J. Olexa, S. Redaelli, A. Valloni, J. Wenninger CERN, Geneva, Switzerland
	During Long Shutdown 1, 18 Large Hadron Collider (LHC) collimators were replaced with a new design, in which beam position monitor (BPM) pick-up buttons are embedded in the collimator jaws. The BPMs provide a direct measurement of the beam orbit at the collimators, and therefore can be used to align the collimators more quickly than using the standard technique which relies on feedback from beam losses. Online orbit measurements also mean that margins in the collimation hierarchy placed specifically to cater for unknown orbit drifts can be reduced, therefore increasing the beta-star and luminosity reach of the LHC. In this paper, the first operational results are presented, including a comparison with the standard alignment technique and a fill-to-fill analysis of the measured orbit in different machine modes in the first year of running after the shutdown.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW034
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THPMW008	Study of Digital Quench Detection System Based on System-on-Chip Technology	controls, timing, FPGA, software	3549
	J.X. Zhang, X.J. Bian, F.S. Chen, J. Cheng, F. Long IHEP, Beijing, People's Republic of China
	Quench detection system is a key component of the quench protection system for superconducting magnets. According to operating experience of the quench protec-tion system for BEPCII interaction region superconduct-ing magnets and study in depth on the development process of System-on-Chip, we are establishing a set of digital quench detection system with high integration density and favourable portability by integrating IP cores, custom modules and developing embedded soft-ware on one piece of FPGA chip (Cyclone V SX SoC). The main components of this system are: 1.Hard proces-sor system based-on ARM Cortex-A9 architecture inte-grated with embedded operating system (Linux).2.Floating point DSP based-on soft IP core.3.Function Module Portion designed for different functions such as communicating with front end ADC, timing control, etc. This paper introduces the research progress of the system. *D.F.Orris, S.Feher, M.J.Lamm, J.Nogiec, S.Sharonov, M.Tartaglia, J.Tompkins, et al.," A digital quench detection system for superconducting magnets", Proceedings of PAC'99, New York, 1999.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW008
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THPOY007	Application of Embedded Linux Boards in SSRF and SXFEL Control System	controls, Linux, power-supply, EPICS	4098
	Y.B. Yan, G.H. Chen, L.W. Lai, Y.B. Leng, L.Y. Yu, W.M. Zhou SINAP, Shanghai, People's Republic of China
	Funding: CAS Key Technology Talent Program and Youth Innovation Promotion Association The embedded Linux boards, such as Raspberry Pi B+ and Beaglebone Black, are credit-card-sized single-board computer. They are low-cost and equipped with a huge array of GPIO (general purpose input output), which can be used to take readings from sensors and control external devices. The active development community and open-source nature also make them ideal choices for many applications. They can be integrated with the accelerator control system and make more devices 'intelligent' via an economical way. It will be helpful to improve the efficiency of the accelerator. The details of the applications in SSRF and SXFEL control system will be reported in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY007
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THPOY017	Design and Implementation of Embedded Applications with EPICS Support for Accelerator Controls	EPICS, controls, interface, operation	4122
	Y.-S. Cheng, K.T. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao NSRRC, Hsinchu, Taiwan
	Low-cost credit-card size SBCs (single-board computer) are with small footprint, powerful in CPU performance and rich interfaces solution to widely adopted for educational purposes and also suitable for small scale embedded applications. The card-size SBCs have been applied for several applications with EPICS support at the TPS control system environment as auxiliary supports which are not suitable to use standard platform in existed control system due to economics, simplicity, specialty view points. The more efforts of several implemented applications are summarized in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY017
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Paper

Title

Other Keywords

Page

MOOCB03

Distributed Matching Scheme and a Deterministic Flexible Matching Algorithm for Arbitrary Systems

distributed, controls, optics, quadrupole

65

Y.-C. Chao
SLAC, Menlo Park, California, USA
Y.-C. Chao
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Paradigm complementary to conventional matching is explored, with matching distributed across the entire line. This can have varying degrees of advantage depending on acuteness of issues in a conventional scheme: - Limited flexibility and space constraint for matching section - Neglect of beam property away from matching section - Excessive envelope/magnet strength caused by matching (sub-optimal tradeoff) - Local envelope blowup inside matching section - Low tolerance to errors and lack of recourse to matching failure - Slow computation process - Unpredictable solution - Limited option/insight/control on implementing solution. A scheme was envisioned to address these, backed by recently developed matching algorithm tailored to this demand. It can be applied to any beamline configuration, including coupled 4D or intervening elements, providing deterministic, rigorous solutions allowing insight and control pre-implementation. It also shows promise of global optimum. Combined with the distributed scheme this algorithm promises additional advantages of speed, determinism and flexibility. Preliminary results, computational demands and possibilities for extension will be discussed.

Slides MOOCB03 [10.412 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOOCB03

Export •

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MOPOR010

Impedance Measurements and Simulations on the TCTP and TDI LHC Collimators

impedance, HOM, simulation, operation

610

N. Biancacci, F. Caspers, A. Grudiev, J. Kuczerowski, I. Lamas Garcia, A. Lechner, E. Métral, A. Passarelli, A. Perillo Marcone, B. Salvant, J.A. Uythoven
CERN, Geneva, Switzerland
O. Frasciello, M. Zobov
INFN/LNF, Frascati (Roma), Italy
A. Mostacci
Rome University La Sapienza, Roma, Italy
N. Mounet
EPFL, Lausanne, Switzerland

The LHC collimation system is a critical element for the safe operation of the LHC machine and is subject to continuous performance monitoring, hardware upgrade and optimization. In this work we will address the impact on impedance of the upgrades performed on the TDI injection protection collimator, where the absorber material has been changed to mitigate the device heating observed in machine operation, and on selected secondary (TCS) and tertiary (TCT) collimators, where beam position monitors (BPM) have been embedded for faster jaw alignment. Concerning the TDI, we will present the RF measurements performed before and after the upgrade, comparing the result to heating and tune shift beam measurements. For the TCTs, we will study how the higher order modes (HOM) introduced by the BPM addition have been cured by means of ferrite placement in the device. The impedance mitigation campaign has been supported by RF measurements whose results are in good agreement with GdfidL and CST simulations. The presence of undamped low frequency modes is proved not to be detrimental to the safe LHC operation.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR010

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WEPMW034

First Operational Experience with Embedded Collimator BPMs in the LHC

alignment, collimation, pick-up, interlocks

2510

G. Valentino, G. Baud, R. Bruce, M. Gąsior, J. Olexa, S. Redaelli, A. Valloni, J. Wenninger
CERN, Geneva, Switzerland

During Long Shutdown 1, 18 Large Hadron Collider (LHC) collimators were replaced with a new design, in which beam position monitor (BPM) pick-up buttons are embedded in the collimator jaws. The BPMs provide a direct measurement of the beam orbit at the collimators, and therefore can be used to align the collimators more quickly than using the standard technique which relies on feedback from beam losses. Online orbit measurements also mean that margins in the collimation hierarchy placed specifically to cater for unknown orbit drifts can be reduced, therefore increasing the beta-star and luminosity reach of the LHC. In this paper, the first operational results are presented, including a comparison with the standard alignment technique and a fill-to-fill analysis of the measured orbit in different machine modes in the first year of running after the shutdown.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW034

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THPMW008

Study of Digital Quench Detection System Based on System-on-Chip Technology

controls, timing, FPGA, software

3549

J.X. Zhang, X.J. Bian, F.S. Chen, J. Cheng, F. Long
IHEP, Beijing, People's Republic of China

Quench detection system is a key component of the quench protection system for superconducting magnets. According to operating experience of the quench protec-tion system for BEPCII interaction region superconduct-ing magnets and study in depth on the development process of System-on-Chip, we are establishing a set of digital quench detection system with high integration density and favourable portability by integrating IP cores, custom modules and developing embedded soft-ware on one piece of FPGA chip (Cyclone V SX SoC). The main components of this system are: 1.Hard proces-sor system based-on ARM Cortex-A9 architecture inte-grated with embedded operating system (Linux).2.Floating point DSP based-on soft IP core.3.Function Module Portion designed for different functions such as communicating with front end ADC, timing control, etc. This paper introduces the research progress of the system.
*D.F.Orris, S.Feher, M.J.Lamm, J.Nogiec, S.Sharonov, M.Tartaglia, J.Tompkins, et al.," A digital quench detection system for superconducting magnets", Proceedings of PAC'99, New York, 1999.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW008

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THPOY007

Application of Embedded Linux Boards in SSRF and SXFEL Control System

controls, Linux, power-supply, EPICS

4098

Y.B. Yan, G.H. Chen, L.W. Lai, Y.B. Leng, L.Y. Yu, W.M. Zhou
SINAP, Shanghai, People's Republic of China

Funding: CAS Key Technology Talent Program and Youth Innovation Promotion Association
The embedded Linux boards, such as Raspberry Pi B+ and Beaglebone Black, are credit-card-sized single-board computer. They are low-cost and equipped with a huge array of GPIO (general purpose input output), which can be used to take readings from sensors and control external devices. The active development community and open-source nature also make them ideal choices for many applications. They can be integrated with the accelerator control system and make more devices 'intelligent' via an economical way. It will be helpful to improve the efficiency of the accelerator. The details of the applications in SSRF and SXFEL control system will be reported in this paper.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY007

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

THPOY017

Design and Implementation of Embedded Applications with EPICS Support for Accelerator Controls

EPICS, controls, interface, operation

4122

Y.-S. Cheng, K.T. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao
NSRRC, Hsinchu, Taiwan

Low-cost credit-card size SBCs (single-board computer) are with small footprint, powerful in CPU performance and rich interfaces solution to widely adopted for educational purposes and also suitable for small scale embedded applications. The card-size SBCs have been applied for several applications with EPICS support at the TPS control system environment as auxiliary supports which are not suitable to use standard platform in existed control system due to economics, simplicity, specialty view points. The more efforts of several implemented applications are summarized in this paper.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY017

Export •

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