ICALEPCS2017 - List of Keywords (linac)

Paper	Title	Other Keywords	Page
TUCPL02	Synchronized Timing and Control System Construction of SuperKEKB Positron Damping Ring	ion, timing, positron, injection	229
	H. Sugimura, K. Furukawa, H. Kaji, F. Miyahara, T.T. Nakamura, Y. Ohnishi, S. Sasaki, M. Satoh KEK, Ibaraki, Japan
	The KEK electron/positron injector chain delivers beams for particle physics and photon science experiments. A damping ring has been constructed at the middle of the linac to generate a positron beam with sufficiently low emittance to support a 40-fold higher luminosity in the SuperKEKB asymmetric collider over the previous project of KEKB, in order to increase our understanding of flavour physics. A timing and control system for the damping ring is under construction to enable the timing synchronization and beam bucket selection between the linac, the positron damping ring and the SuperKEKB main ring. It should manage precise timing down to several picoseconds for the beam energy and bunch compression systems. Besides precise timing controls to receive and transmit positron beams, it has to meet local analysis requirements in order to measure beam properties precisely with changing the RF frequency. It is incorporating the event timing control modules from MRF and SINAP.
	Talk as video stream: https://youtu.be/BMAJimbEQB4
	Slides TUCPL02 [0.482 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUCPL02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUMPA02	Development of a Machine Protection System for KOMAC Facility	ion, machine-protect, EPICS, ISOL	334
	Y.G. Song, Y.-S. Cho, H.S. Jeong, D.I. Kim, H.S. Kim, J.H. Kim, S.G. Kim, H.-J. Kwon, S.P. Yun Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
	Funding: This work is supported by the Ministry of Science, ICT & Future Planning. The Korea multi-purpose accelerator complex (KOMAC) has two beam extraction points at 20 and 100 MeV for proton beam utilization. High availability should be achieved through high system reliability and short maintenance times to prevent and mitigate damage. A machine protection system is essential for avoiding damage leading to long maintenance times. KOMAC MPS that was developed using analog circuit interlock box has its limit to cover increasing interlock signals and modify interlock logic. The disadvantage has been solved with digital-based system for more efficient logic modification and interlock extension. The MPS is configured remotely using the EPICS-based application. In this paper, we present KOMAC machine protection architecture and performance results of the new machine protection system.
	Slides TUMPA02 [1.810 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUMPA02
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TUPHA060	Control System of the Linear Accelerator as a Part of Nuclear Facility NSC KIPT Neutron Source	ion, controls, electron, neutron	534
	D.V. Tarasov, V.P. Lyashchenko, A.Y. Zelinsky NSC/KIPT, Kharkov, Ukraine
	NSC KIPT Neutron Source on the base of subcritical assembly involves 100 MeV/100 kW electron linear accelerator as a driver. Because the Neutron Source is nuclear facility all technological systems of the facility are under regulation of State Inspection of Nuclear Regulation of Ukraine that is working in accordance with international nuclear regulation legislation. This regulation demands certain requirement to the design and realization of the facility control system in order to provide the conditions of the facility safe operation. In the paper, the features of control system of the linear accelerators as a part of nuclear facility NSC KIPT Neutron Source are described.
	Poster TUPHA060 [1.106 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA060
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TUPHA079	Timing System Using FPGA for Medical Linear Accelerator Prototype at SLRI	timing, ion, FPGA, controls	589
	P. Koonpong, R. Rujanakraikarn SLRI, Nakhon Ratchasima, Thailand
	A prototype of medical linear accelerator is under development at Synchrotron Light Research Institute (SLRI). In order to maintain the proper operation of the machine, the pulse signal is used to synchronize the various subsystems such as electron gun, RF trigger, and magnetron trigger subsystems. In this project, we design the timing system using a XilinxSpartan-3 FPGA development board with VHDL in order to achieve the desired characteristics and sequences of the timing signals for those subsystems. A LabVIEW GUI is designed to interface with the timing system in order to control the time delay and pulse width via RS-232 serial interface. The results of the system design is achieved with the pulse resolution of a 20 nsec per step for four timing channels. The time delay and pulse width for each channel can be set independently based on the SYNC reference signal.
	Poster TUPHA079 [3.417 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA079
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TUPHA084	Decoupling CERN Accelerators	ion, timing, injection, operation	608
	A. Dworak, J.C. Bau CERN, Geneva, Switzerland
	The accelerator complex at CERN is a living system. Accelerators are being dismantled, upgraded or change their purpose. New accelerators are built. The changes do not happen overnight, but when they happen they may require profound changes across the handling systems. Central timings (CT), responsible for sequencing and synchronization of accelerators, are good examples of such systems. This paper shows how over the past twenty years the changes and new requirements influenced the evolution of the CTs. It describes experience gained from using the CBCM CT model, for strongly coupled accelerators, and how it led to a design of a new Dynamic Beam Negotiation (DBN) model for the AD and ELENA accelerators, which reduces the coupling, increasing accelerator independence. The paper ends with an idea how to merge strong points of both models in order to create a single generic system able to efficiently handle all involved CERN accelerators and provide more beam time to experiments and LHC.
	Poster TUPHA084 [0.477 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA084
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TUPHA214	Current Status of IPM Linac Control System	ion, controls, EPICS, PLC	973
	S. Haghtalab, F. Ghasemi, M. Lamehi IPM, Tehran, Iran F. Abbasi Davani Shahid Beheshti University, Evin, Tehran, Iran S. Ahmadian ILSF, Tehran, Iran
	Funding: Institute for research in fundamental sciences (IPM) This paper reports the progress of the control system for IPM 10 MeV accelerator. As an electron linac, it consists of beam injection acceleration tube, radio frequency production and transmission, target, diagnostics and control and safety. In support of this source, an EPICS-based integrated control system has been designed and being implemented from scratch to provide access to the critical control points and continues to grow to simplify operation of the system. In addition to a PLC-based machine protection component and IO interface, a CSS-based suite of control GUI monitors systems including Modulator and RF, Vacuum, Magnets, and electron gun. An overview of this system is presented in this article.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA214
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THMPL02	Upgrade of KEK Electron/positron Linac Control System for the Both SuperKEKB and Light Sources	ion, experiment, injection, electron	1257
	K. Furukawa, Y. Enomoto, H. Kaji, H. Katagiri, M. Kurashina, K. Mikawa, T. Miura, F. Miyahara, T. Natsui, I. Satake, M. Satoh, Y. Seimiya, H. Sugimura, T. Suwada KEK, Ibaraki, Japan
	KEK injector linac has delivered electrons and positrons for particle physics and photon science experiments for more than 30 years. It is being upgraded for the SuperKEKB project, which aims at a 40-fold increase in luminosity over the previous project of KEKB, in order to increase our understanding of flavour physics. This project requires ten-times smaller emittance and five-times larger current in injection beam from the injector. And many hardware components are being tested and installed. Even during the 6-year upgrade, it was requested to inject beams into light sources storage rings of PF and PF-AR. Furthermore, the beam demanding approaches from those storage rings are different. SuperKEKB would demand highest performance, and unscheduled interruption may be acceptable if the performance would be improved. However, light sources expect a stable operation without any unscheduled break, mainly because most users run experiments for a short period. In order to deal with the both requirements several measures are taken for operation, construction and maintenance strategy including simultaneous top-up injections.
	Slides THMPL02 [2.421 MB]
	Poster THMPL02 [6.998 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPL02
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THMPA04	RF-Energy Management for the European XFEL	ion, FEL, operation, LLRF	1312
	O. Hensler DESY, Hamburg, Germany
	The European XFEL is in its commissioning phase at this time. One of the major tasks is to bring up all the 25 installed RF-stations, which will allow for beam energy of up to 17.5GeV. It is expected, that a klystron may fail every 1-2 month. The accelerator is designed at the moment with an energy overhead corresponding to 2-3 RF-station, as the last 4 accelerating modules will be installed in a later stage. This will allow recovering the missing energy with the other functioning RF-stations to keep downtime as short as possible in the order of seconds. The concept and corresponding High-Level software accomplishing this task will be presented in this paper.
	Slides THMPA04 [2.129 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA04
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THMPA07	Improvement of Temperature and Humidity Measurement System for KEK Injector Linac	ion, software, EPICS, klystron	1323
	I. Satake, M. Satoh, T. Suwada, Y. Yano KEK, Ibaraki, Japan T. Kudou, S. Kusano, Y. Mizukawa Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
	A temperature and humidity measurement system at the KEK injector linac consists of 26 data loggers connected to around 700 temperature and humidity sensors, one EPICS IOC, and CSS archiver. CSS archiver engine retrieves the temperature and humidity data measured by the data loggers via Ethernet. These data are finally stored into the PostgreSQL based database. A new server computer has been recently utilized for the archiver of CSS version 4 instead of version 3. It can drastically improve the speed performance for retrieving the archived data. The long-term beam stability of linac is getting a quite important figure of merit since the simultaneous top up injection is required for the independent four storage rings toward the SuperKEKB Phase II operation. For this reason, we developed a new archiver data management application with a good operability. Since it can bring the operators a quick detection of anomalous behavior of temperature and humidity data resulting in the deterioration of beam quality, the improved temperature and humidity measurement system can be much effective. We will report the detailed system description and practical application to the daily beam operation.
	Slides THMPA07 [2.221 MB]
	Poster THMPA07 [1.892 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA07
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THPHA051	Present Status of the Daejeon Ion Accelerator Complex at KAERI	ion, rfq, controls, target	1482
	S.-R. Huh, D.S. Chang, C.K. Hwang, J.-T. Jin, S.K. Lee, B.H. Oh KAERI, Daejon, Republic of Korea
	Funding: This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korean government(MSIP:Ministry of Science, ICT and Future Planning) (No. 2015M2B2A6031448). The Daejeon ion accelerator complex (DIAC) is being constructed at Korea Atomic Energy Research Institute (KAERI) in order to fulfill an increasing demand for heavy ion beam facilities for various purposes including material study and biological research. Based on devices of the Tokai radioactive ion accelerator complex received from high energy accelerator research organization (KEK), Japan, the dedicated accelerators in the DIAC are designed to produce stable heavy ion beams with energies up to 1 MeV/u. To date, (1) assembly of the electron cyclotron resonance (ECR) ion source and linacs delivered in pieces from the KEK (2) installation of the power supply, coolant circulation system, and vacuum pump system, (3) operation test of the ECR ion source, (4) full-power tests of the interdigital H-type (IH) and radio-frequency quadrupole (RFQ) linacs, (5) construction of a radiation shielded walls for the DIAC, (6) tests of tuners in the RFQ, IH, and rebuncher, and (7) reorganization of the integrated control system have been completed. In the presentation, current status, plans, and test results for the DIAC construction will be presented and discussed in detail.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA051
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THPHA056	The Linac4 Vacuum Control System	ion, controls, vacuum, PLC	1494
	S. Blanchard, J. De La Gama, R. Ferreira, P. Gomes, A. Gutierrez, G. Pigny, A.P. Rocha CERN, Geneva, Switzerland L. Kopylov, M.S. Mikheev IHEP, Moscow Region, Russia
	Linac4 is 160 MeV H⁻ linear accelerator replacing Linac2 as the first injector to the CERN accelerator complex, that culminates with the Large Hadron Collider. This new linac will increase the beam brightness by a factor of two. The vacuum installation consists of 235 remotely controlled pumps, valves and gauges. These instruments are either controlled individually or driven by pumping stations and gas injection processes. Valves and pumps are interlocked according to gauge pressure levels and pump statuses. The vacuum control system communicates with the beam interlock system, the ion source electronics and the Radio Frequency control system, through cabled digital and analog signals. The vacuum control system is based on commercial Programmable Logical Controllers (Siemens PLCs) and a Supervisory Control And Data Acquisition application (Siemens SCADA: WINCC OA). This paper describes the control architecture and process, and reports on the control requirements and the implemented solutions.
	Poster THPHA056 [1.361 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA056
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THPHA064	Control System Status of SuperKEKB Injector Linac	ion, controls, electron, EPICS	1522
	M. Satoh, Y. Enomoto, K. Furukawa, F. Miyahara, T. Natsui, I. Satake, Y. Seimiya, H. Sugimura, T. Suwada KEK, Ibaraki, Japan K. Hisazumi, T. Kudou, Y. Kuroda, S. Kusano, Y. Mizukawa, S. Ushimoto Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan T. Ohfusa, H.S. Saotome, M. Takagi Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
	The Phase I beam commissioning of SuperKEKB has been conducted from February to June in the last year. The injector linac has successfully delivered the electron and positron beams to the SuperKEKB main ring. The linac beam studies and subsystem developments are also intensively going on together with the daily normal beam injection to both rings of the SuperKEKB and two light sources. Towards Phase II and III beam commissioning of SuperKEKB, one of key issues is a fine beam control with the new beam position monitor readout system, a positron capture system based on the flux concentrator, a pulsed quadrupole and steering magnets, and a low emittance photo-cathode rf electron source. In this paper, we report the control system status of SuperKEKB injector linac together with the commissioning result of Phase I. In addition, the improvement plant of injector control system is also mentioned.
	Poster THPHA064 [0.808 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA064
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THPHA106	Commissioning of a New Dose Rate Monitoring System at the S-DALINAC	ion, radiation, detector, controls	1625
	J. Birkhan, M. Arnold, U. Bonnes, J. Conrad, M. Hess, L. Marc, N. Pietralla, L. Stobbe, P. von Neumann-Cosel TU Darmstadt, Darmstadt, Germany
	Funding: RTG 2128 AccelencE Recently a new radiation protection interlock system has been established at the Darmstadt superconducting linear electron accelerator S-DALINAC []. It prevents the staff from entering radiation protection areas during operation and allows a systematic scanning of these areas for workers before running the accelerator. As an extension of the new interlock, a new dose rate monitoring system has been developed using PIN diodes and self-made ion chambers. These detectors will be used to perfom online dose rate measurements in order to switch automtically the status of illuminated radiation protection panels, which show the current level of protection area. Furthermore, they will be used to characterize systematically the radiation fluxes inside the accelerator facility and to support the beam diagnostics. The readout electronics consists ofμcontrollers with ethernet interfaces using TCP/IP based serial communication. The data acquisition is integrated into the EPICS based control system. First results of the commissioning will be presented. [] M. Arnold et al., THE NEW PLC BASED RADIATION SAFETY INTERLOCK SYSTEM AT S-DALINAC, Proceedings of IPAC2014, Dresden, Germany, 2014.
	Poster THPHA106 [1.428 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA106
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THPHA110	Machine Protection System Research and Development for the Fermilab PIP-II Proton Linac	ion, operation, pick-up, controls	1643
	A. Warner, L.R. Carmichael, B. Harrison, N. Liu, R. Neswold, A.L. Saewert, J.Y. Wu Fermilab, Batavia, Illinois, USA
	PIP-II is a high intensity proton linac being design to support a world-leading physics program at Fermilab. Initially it will provide high intensity beams for Fermilab's neutrino program with a future extension to other applications requiring an upgrade to CW linac operation (e.g. muon experiments). The machine is conceived to be 2 mA CW, 800 MeV H⁻ linac capable of working initially in a pulse (0.55 ms, 20 Hz) mode for injection into the existing Booster. The planned upgrade to CW operation implies that the total beam current and damage potential will be greater than in any present HEP hadron linac. To mitigate the primary technical risk and challenges associated PIP-II an integrated system test for the PIP-II front-end technology is being developed. As part of the R&D a robust machine protection system (MPS) is being designed. This paper describes the progress and challenges associated with the MPS.
	Poster THPHA110 [1.676 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA110
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Paper

Title

Other Keywords

Page

TUCPL02

Synchronized Timing and Control System Construction of SuperKEKB Positron Damping Ring

ion, timing, positron, injection

229

H. Sugimura, K. Furukawa, H. Kaji, F. Miyahara, T.T. Nakamura, Y. Ohnishi, S. Sasaki, M. Satoh
KEK, Ibaraki, Japan

The KEK electron/positron injector chain delivers beams for particle physics and photon science experiments. A damping ring has been constructed at the middle of the linac to generate a positron beam with sufficiently low emittance to support a 40-fold higher luminosity in the SuperKEKB asymmetric collider over the previous project of KEKB, in order to increase our understanding of flavour physics. A timing and control system for the damping ring is under construction to enable the timing synchronization and beam bucket selection between the linac, the positron damping ring and the SuperKEKB main ring. It should manage precise timing down to several picoseconds for the beam energy and bunch compression systems. Besides precise timing controls to receive and transmit positron beams, it has to meet local analysis requirements in order to measure beam properties precisely with changing the RF frequency. It is incorporating the event timing control modules from MRF and SINAP.

Talk as video stream: https://youtu.be/BMAJimbEQB4

Slides TUCPL02 [0.482 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUCPL02

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

TUMPA02

Development of a Machine Protection System for KOMAC Facility

ion, machine-protect, EPICS, ISOL

334

Y.G. Song, Y.-S. Cho, H.S. Jeong, D.I. Kim, H.S. Kim, J.H. Kim, S.G. Kim, H.-J. Kwon, S.P. Yun
Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea

Funding: This work is supported by the Ministry of Science, ICT & Future Planning.
The Korea multi-purpose accelerator complex (KOMAC) has two beam extraction points at 20 and 100 MeV for proton beam utilization. High availability should be achieved through high system reliability and short maintenance times to prevent and mitigate damage. A machine protection system is essential for avoiding damage leading to long maintenance times. KOMAC MPS that was developed using analog circuit interlock box has its limit to cover increasing interlock signals and modify interlock logic. The disadvantage has been solved with digital-based system for more efficient logic modification and interlock extension. The MPS is configured remotely using the EPICS-based application. In this paper, we present KOMAC machine protection architecture and performance results of the new machine protection system.

Slides TUMPA02 [1.810 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUMPA02

Export •

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

TUPHA060

Control System of the Linear Accelerator as a Part of Nuclear Facility NSC KIPT Neutron Source

ion, controls, electron, neutron

534

D.V. Tarasov, V.P. Lyashchenko, A.Y. Zelinsky
NSC/KIPT, Kharkov, Ukraine

NSC KIPT Neutron Source on the base of subcritical assembly involves 100 MeV/100 kW electron linear accelerator as a driver. Because the Neutron Source is nuclear facility all technological systems of the facility are under regulation of State Inspection of Nuclear Regulation of Ukraine that is working in accordance with international nuclear regulation legislation. This regulation demands certain requirement to the design and realization of the facility control system in order to provide the conditions of the facility safe operation. In the paper, the features of control system of the linear accelerators as a part of nuclear facility NSC KIPT Neutron Source are described.

Poster TUPHA060 [1.106 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA060

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TUPHA079

Timing System Using FPGA for Medical Linear Accelerator Prototype at SLRI

timing, ion, FPGA, controls

589

P. Koonpong, R. Rujanakraikarn
SLRI, Nakhon Ratchasima, Thailand

A prototype of medical linear accelerator is under development at Synchrotron Light Research Institute (SLRI). In order to maintain the proper operation of the machine, the pulse signal is used to synchronize the various subsystems such as electron gun, RF trigger, and magnetron trigger subsystems. In this project, we design the timing system using a XilinxSpartan-3 FPGA development board with VHDL in order to achieve the desired characteristics and sequences of the timing signals for those subsystems. A LabVIEW GUI is designed to interface with the timing system in order to control the time delay and pulse width via RS-232 serial interface. The results of the system design is achieved with the pulse resolution of a 20 nsec per step for four timing channels. The time delay and pulse width for each channel can be set independently based on the SYNC reference signal.

Poster TUPHA079 [3.417 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA079

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TUPHA084

Decoupling CERN Accelerators

ion, timing, injection, operation

608

A. Dworak, J.C. Bau
CERN, Geneva, Switzerland

The accelerator complex at CERN is a living system. Accelerators are being dismantled, upgraded or change their purpose. New accelerators are built. The changes do not happen overnight, but when they happen they may require profound changes across the handling systems. Central timings (CT), responsible for sequencing and synchronization of accelerators, are good examples of such systems. This paper shows how over the past twenty years the changes and new requirements influenced the evolution of the CTs. It describes experience gained from using the CBCM CT model, for strongly coupled accelerators, and how it led to a design of a new Dynamic Beam Negotiation (DBN) model for the AD and ELENA accelerators, which reduces the coupling, increasing accelerator independence. The paper ends with an idea how to merge strong points of both models in order to create a single generic system able to efficiently handle all involved CERN accelerators and provide more beam time to experiments and LHC.

Poster TUPHA084 [0.477 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA084

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TUPHA214

Current Status of IPM Linac Control System

ion, controls, EPICS, PLC

973

S. Haghtalab, F. Ghasemi, M. Lamehi
IPM, Tehran, Iran
F. Abbasi Davani
Shahid Beheshti University, Evin, Tehran, Iran
S. Ahmadian
ILSF, Tehran, Iran

Funding: Institute for research in fundamental sciences (IPM)
This paper reports the progress of the control system for IPM 10 MeV accelerator. As an electron linac, it consists of beam injection acceleration tube, radio frequency production and transmission, target, diagnostics and control and safety. In support of this source, an EPICS-based integrated control system has been designed and being implemented from scratch to provide access to the critical control points and continues to grow to simplify operation of the system. In addition to a PLC-based machine protection component and IO interface, a CSS-based suite of control GUI monitors systems including Modulator and RF, Vacuum, Magnets, and electron gun. An overview of this system is presented in this article.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA214

Export •

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

THMPL02

Upgrade of KEK Electron/positron Linac Control System for the Both SuperKEKB and Light Sources

ion, experiment, injection, electron

1257

K. Furukawa, Y. Enomoto, H. Kaji, H. Katagiri, M. Kurashina, K. Mikawa, T. Miura, F. Miyahara, T. Natsui, I. Satake, M. Satoh, Y. Seimiya, H. Sugimura, T. Suwada
KEK, Ibaraki, Japan

KEK injector linac has delivered electrons and positrons for particle physics and photon science experiments for more than 30 years. It is being upgraded for the SuperKEKB project, which aims at a 40-fold increase in luminosity over the previous project of KEKB, in order to increase our understanding of flavour physics. This project requires ten-times smaller emittance and five-times larger current in injection beam from the injector. And many hardware components are being tested and installed. Even during the 6-year upgrade, it was requested to inject beams into light sources storage rings of PF and PF-AR. Furthermore, the beam demanding approaches from those storage rings are different. SuperKEKB would demand highest performance, and unscheduled interruption may be acceptable if the performance would be improved. However, light sources expect a stable operation without any unscheduled break, mainly because most users run experiments for a short period. In order to deal with the both requirements several measures are taken for operation, construction and maintenance strategy including simultaneous top-up injections.

Slides THMPL02 [2.421 MB]

Poster THMPL02 [6.998 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPL02

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

THMPA04

RF-Energy Management for the European XFEL

ion, FEL, operation, LLRF

1312

O. Hensler
DESY, Hamburg, Germany

The European XFEL is in its commissioning phase at this time. One of the major tasks is to bring up all the 25 installed RF-stations, which will allow for beam energy of up to 17.5GeV. It is expected, that a klystron may fail every 1-2 month. The accelerator is designed at the moment with an energy overhead corresponding to 2-3 RF-station, as the last 4 accelerating modules will be installed in a later stage. This will allow recovering the missing energy with the other functioning RF-stations to keep downtime as short as possible in the order of seconds. The concept and corresponding High-Level software accomplishing this task will be presented in this paper.

Slides THMPA04 [2.129 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA04

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THMPA07

Improvement of Temperature and Humidity Measurement System for KEK Injector Linac

ion, software, EPICS, klystron

1323

I. Satake, M. Satoh, T. Suwada, Y. Yano
KEK, Ibaraki, Japan
T. Kudou, S. Kusano, Y. Mizukawa
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan

A temperature and humidity measurement system at the KEK injector linac consists of 26 data loggers connected to around 700 temperature and humidity sensors, one EPICS IOC, and CSS archiver. CSS archiver engine retrieves the temperature and humidity data measured by the data loggers via Ethernet. These data are finally stored into the PostgreSQL based database. A new server computer has been recently utilized for the archiver of CSS version 4 instead of version 3. It can drastically improve the speed performance for retrieving the archived data. The long-term beam stability of linac is getting a quite important figure of merit since the simultaneous top up injection is required for the independent four storage rings toward the SuperKEKB Phase II operation. For this reason, we developed a new archiver data management application with a good operability. Since it can bring the operators a quick detection of anomalous behavior of temperature and humidity data resulting in the deterioration of beam quality, the improved temperature and humidity measurement system can be much effective. We will report the detailed system description and practical application to the daily beam operation.

Slides THMPA07 [2.221 MB]

Poster THMPA07 [1.892 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA07

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THPHA051

Present Status of the Daejeon Ion Accelerator Complex at KAERI

ion, rfq, controls, target

1482

S.-R. Huh, D.S. Chang, C.K. Hwang, J.-T. Jin, S.K. Lee, B.H. Oh
KAERI, Daejon, Republic of Korea

Funding: This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korean government(MSIP:Ministry of Science, ICT and Future Planning) (No. 2015M2B2A6031448).
The Daejeon ion accelerator complex (DIAC) is being constructed at Korea Atomic Energy Research Institute (KAERI) in order to fulfill an increasing demand for heavy ion beam facilities for various purposes including material study and biological research. Based on devices of the Tokai radioactive ion accelerator complex received from high energy accelerator research organization (KEK), Japan, the dedicated accelerators in the DIAC are designed to produce stable heavy ion beams with energies up to 1 MeV/u. To date, (1) assembly of the electron cyclotron resonance (ECR) ion source and linacs delivered in pieces from the KEK (2) installation of the power supply, coolant circulation system, and vacuum pump system, (3) operation test of the ECR ion source, (4) full-power tests of the interdigital H-type (IH) and radio-frequency quadrupole (RFQ) linacs, (5) construction of a radiation shielded walls for the DIAC, (6) tests of tuners in the RFQ, IH, and rebuncher, and (7) reorganization of the integrated control system have been completed. In the presentation, current status, plans, and test results for the DIAC construction will be presented and discussed in detail.

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THPHA056

The Linac4 Vacuum Control System

ion, controls, vacuum, PLC

1494

S. Blanchard, J. De La Gama, R. Ferreira, P. Gomes, A. Gutierrez, G. Pigny, A.P. Rocha
CERN, Geneva, Switzerland
L. Kopylov, M.S. Mikheev
IHEP, Moscow Region, Russia

Linac4 is 160 MeV H⁻ linear accelerator replacing Linac2 as the first injector to the CERN accelerator complex, that culminates with the Large Hadron Collider. This new linac will increase the beam brightness by a factor of two. The vacuum installation consists of 235 remotely controlled pumps, valves and gauges. These instruments are either controlled individually or driven by pumping stations and gas injection processes. Valves and pumps are interlocked according to gauge pressure levels and pump statuses. The vacuum control system communicates with the beam interlock system, the ion source electronics and the Radio Frequency control system, through cabled digital and analog signals. The vacuum control system is based on commercial Programmable Logical Controllers (Siemens PLCs) and a Supervisory Control And Data Acquisition application (Siemens SCADA: WINCC OA). This paper describes the control architecture and process, and reports on the control requirements and the implemented solutions.

Poster THPHA056 [1.361 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA056

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THPHA064

Control System Status of SuperKEKB Injector Linac

ion, controls, electron, EPICS

1522

M. Satoh, Y. Enomoto, K. Furukawa, F. Miyahara, T. Natsui, I. Satake, Y. Seimiya, H. Sugimura, T. Suwada
KEK, Ibaraki, Japan
K. Hisazumi, T. Kudou, Y. Kuroda, S. Kusano, Y. Mizukawa, S. Ushimoto
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
T. Ohfusa, H.S. Saotome, M. Takagi
Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan

The Phase I beam commissioning of SuperKEKB has been conducted from February to June in the last year. The injector linac has successfully delivered the electron and positron beams to the SuperKEKB main ring. The linac beam studies and subsystem developments are also intensively going on together with the daily normal beam injection to both rings of the SuperKEKB and two light sources. Towards Phase II and III beam commissioning of SuperKEKB, one of key issues is a fine beam control with the new beam position monitor readout system, a positron capture system based on the flux concentrator, a pulsed quadrupole and steering magnets, and a low emittance photo-cathode rf electron source. In this paper, we report the control system status of SuperKEKB injector linac together with the commissioning result of Phase I. In addition, the improvement plant of injector control system is also mentioned.

Poster THPHA064 [0.808 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA064

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THPHA106

Commissioning of a New Dose Rate Monitoring System at the S-DALINAC

ion, radiation, detector, controls

1625

J. Birkhan, M. Arnold, U. Bonnes, J. Conrad, M. Hess, L. Marc, N. Pietralla, L. Stobbe, P. von Neumann-Cosel
TU Darmstadt, Darmstadt, Germany

Funding: RTG 2128 AccelencE
Recently a new radiation protection interlock system has been established at the Darmstadt superconducting linear electron accelerator S-DALINAC [*]. It prevents the staff from entering radiation protection areas during operation and allows a systematic scanning of these areas for workers before running the accelerator. As an extension of the new interlock, a new dose rate monitoring system has been developed using PIN diodes and self-made ion chambers. These detectors will be used to perfom online dose rate measurements in order to switch automtically the status of illuminated radiation protection panels, which show the current level of protection area. Furthermore, they will be used to characterize systematically the radiation fluxes inside the accelerator facility and to support the beam diagnostics. The readout electronics consists ofμcontrollers with ethernet interfaces using TCP/IP based serial communication. The data acquisition is integrated into the EPICS based control system. First results of the commissioning will be presented.
[*] M. Arnold et al., THE NEW PLC BASED RADIATION SAFETY INTERLOCK SYSTEM AT S-DALINAC, Proceedings of IPAC2014, Dresden, Germany, 2014.

Poster THPHA106 [1.428 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA106

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THPHA110

Machine Protection System Research and Development for the Fermilab PIP-II Proton Linac

ion, operation, pick-up, controls

1643

A. Warner, L.R. Carmichael, B. Harrison, N. Liu, R. Neswold, A.L. Saewert, J.Y. Wu
Fermilab, Batavia, Illinois, USA

PIP-II is a high intensity proton linac being design to support a world-leading physics program at Fermilab. Initially it will provide high intensity beams for Fermilab's neutrino program with a future extension to other applications requiring an upgrade to CW linac operation (e.g. muon experiments). The machine is conceived to be 2 mA CW, 800 MeV H⁻ linac capable of working initially in a pulse (0.55 ms, 20 Hz) mode for injection into the existing Booster. The planned upgrade to CW operation implies that the total beam current and damage potential will be greater than in any present HEP hadron linac. To mitigate the primary technical risk and challenges associated PIP-II an integrated system test for the PIP-II front-end technology is being developed. As part of the R&D a robust machine protection system (MPS) is being designed. This paper describes the progress and challenges associated with the MPS.

Poster THPHA110 [1.676 MB]

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