Event-based Pulse-to-pulse Beam Modulation Controls for Simultaneous Injections

[Overview]   [Presentations&Articles]   [Japanese-Articles]   [Links]  


Overview


Virtual accelerators realized by pulse-to-pulse beam modulation

A simultaneous injection to three rings of KEKB HER, LER and PF-ring has been planned since 2006, and it was achieved in 2008. It consists of fabrication of pulsed devices and installation of fast controls. It is essentially a pulse-to-pulse beam modulation (ppm) from a viewpoint of controls. Three beams with 3-times different energies and 100-times different charges are accelerated pulse by pulse separated only by 20 milliseconds. Resultant beam currents became constant within 0.05% and 0.01% at KEKB and PF rings, respectively, that provided the precise collision tuning for higher luminosity at KEKB and stable experimental conditions at PF.

For the SuperKEKB project the event-based control mechanism is indispensable as well. However, two sets of the original event-based controls are installed for the both upstream and downstream sections of injector linac, and another event timing control system is introduced over the top of those two.

Developed technologies includes:

  • Pulsed devices such as a bending magnet and steering magnets.
  • Fast low level RF controls.
  • Fast beam charge interlock system.
  • Timing system.
  • Event-based fast global control system.
  • Fast beam monitors such as beam position monitors and wire scanners.
  • Fast timing and microwave monitors with large dynamic range.
  • Beam optics design for beams with multiple energies.

Please send your comments and questions to K.Furukawa.


Presentations and Articles

Injection and Extraction Timing Controls at SuperKEKB Damping Ring [pdf]  
H. Sugimura, H. Kaji, F. Miyahara, M. Satoh, Y. Iitsuka, T. Kudou, S. Kusano, Proc. of PCaPAC2018, Hsinchu, Taiwan, October 2018, pp.-, THP17.

Timing System for Multiple Accelerator Rings at KEK e+/e- Injector LINAC [pdf]  
F. Miyahara, K. Furukawa, H. Kaji, M. Satoh, H. Sugimura, H. Saotome, T. Kudo, S. Kusano, Proc. of PCaPAC2018, Hsinchu, Taiwan, October 2018, pp.-, THP19.

Pulse-to-pulse Beam Modulation for 4 Storage Rings with 64 Pulsed Magnets [pdf]   [slide]
Y. Enomoto, K. Furukawa, T. Kamitani, F. Miyahara, T. Natsui, M. Satoh, K. Yokoyama, M. Yoshida, S. Ushimoto, H. Saotome, Proc. of LINAC2018, Beijing, China, September 2018, pp.-, WE1A06.

Trigger control system with Beam Gate at SuperKEKB injector LINAC and Damping Ring [pdf]
H. Sugimura, H. Kaji, M. Satoh, F. Miyahara, S. Sasaki, S. Kusano, T. Kudou, Y. Iitsuka, Proc. of PASJ2018, Nagaoka, Japan, August 2018, pp.1078-1081, THP091.

Timing system for the KEK e+/e- Injector Linac [pdf]
F. Miyahara, H. Kaji, H. Sugimura, H. Katagiri, M. Satoh, T. Suwada, X. Zhou, R. Zhang, K. Furukawa, T. Matsumoto, T. Miura, M. Yoshida, S. Kusano, T. Kudo, H. Kumano, T. Oofusa, H. Saotome, Proc. of PASJ2018, Nagaoka, Japan, August 2018, pp.544-548, WEP082.

A New Pulse Magnet Control System in the KEK Electron Positron LINAC [pdf]   [doi]
Y. Enomoto, K. Furukawa, T. Natsui, M. Satoh, H. Saotome, Proc. of IPAC2018, Vancouver, Canada, April 2018, pp.2121-2123, WEPAK014.

Synchronized Timing and Control System Construction of SuperKEKB Positron Damping Ring [pdf]   [slide]
H. Sugimura, K. Furukawa, H. Kaji, Y. Ohnishi, M. Satoh, F. Miyahara, S. Sasaki, T.T. Nakamura, Proc. of ICALEPCS2017, Barcelona, Spain, October, 2017, pp.229-231, TUCPL02.

Injection Control System for the SuperKEKB Phase-I Operation [pdf]
H. Kaji, K. Furukawa, F. Miyahara, T.T. Nakamura, M. Satoh, Y. Iitsuka, N. Yoshifuji, T. Kudou, S. Kusano , M. Hirose, Proc. of PASJ2016, Chiba, Japan, August, 2016, pp.1146-1149, TUP092.

New Event Timing System for Damping Ring at SuperKEKB [jacow] [slide/jacow]
H. Kaji, K. Furukawa, M. Iwasaki, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Satoh, M. Suetake, M. Tobiyama, Y. Iitsuka, T. Kudou, S. Kusano, M. Liu, C.X. Yin, Proc. of ICALEPCS2015, Melbourne, Australia, October, 2015, pp.629-632, WEC3O04.

Development of FPGA-Based TDC with Wide Dynamic Range for Monitoring the Trigger Timing Distribution System at the KEKB Injector Linac [pdf]
T. Suwada, K. Furukawa, F. Miyahara, Proc of IBIC2015, Melbourne, Australia, September, 2015, pp.70-74, MOPB017.

High Position Resolution BPM Readout System with Calibration Pulse Generators for KEK e+/e- Linac [pdf]
F. Miyahara, K. Furukawa, M. Satoh, T. Suwada , R. Ichimiya, H. Saotome, Proc of IBIC2015, Melbourne, Australia, September, 2015, pp.369-372, TUPB023.

Bucket Selection System for SuperKEKB [pdf]
H. Kaji, K. Furukawa, M. Iwasaki, E. Kikutani, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Satoh, M. Suetake, M. Tobiyama, T. Okazaki, Y. Iitsuka, T. Kudou, S. Kusano, Proc of PASJ2015, Tsuruga, Japan, August, 2015, pp.1278-1281, THP100.

Installation and Commissioning of New Event Timing System for SuperKEKB [pdf]
H. Kaji, K. Furukawa, M. Iwasaki, E. Kikutani, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Satoh, M. Suetake, M. Tobiyama, T. Okazaki, Y. Iitsuka, T. Kudou, S. Kusano, Proc of PASJ2015, Tsuruga, Japan, August, 2015, pp.223-227, FROL15.

Construction and Commissioning of Event Timing System at SuperKEKB [jacow]
H. Kaji, K. Furukawa, M. Iwasaki, E. Kikutani, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Satoh, M. Suetake, M. Tobiyama, T. Okazaki, T. Kudou, S. Kusano, Proc of IPAC2014, Dresden, Germany, June, 2014, pp.1829-1832, TUPRI109.

Upgrade of Event Timing System at SuperKEKB [pdf],   [slide]
H. Kaji, K. Furukawa, M. Iwasaki, E. Kikutani, T. Kobayashi, F. Miyahara, T.T. Nakamura, M. Suetake, M. Tobiyama, T. Okazaki, N. Yoshifuji, T. Kudou, S. Kusano, Proc of ICALEPCS2013, San Francisco, USA, October, 2013, pp.1453-1456, THCOCA04.

Upgrade of BPM DAQ System for SuperKEKB Injector Linac [pdf],   [poster]
M. Satoh, F. Miyahara, T. Suwada, K. Furukawa, T. Kudou, S. Kusano, Proc of ICALEPCS2013, San Francisco, USA, October, 2013, pp.1153-1156, THPPC033.

Beam Feedback System Challenges at SuperKEKB Injector Linac [pdf],   [slide]
K. Furukawa, R. Ichimiya, M. Iwasaki, H. Kaji, F. Miyahara, T.T. Nakamura, M. Satoh, T. Suwada, Proc of ICALEPCS2013, San Francisco, USA, October, 2013, pp.1497-1500, FRCOBAB04.

Development and Application of the Trigger Timing Watchdog System in KEK Electron/Positron Linac [pdf]
M. Satoh, F. Miyahara, T. Suwada, K. Furukawa, Proc of IPAC2013, Shanghai, China, May, 2013, pp.2962-2964, WEPME017.

Accelerator control system at KEKB and the linac [doi]
A. Akiyama, K. Furukawa, E. Kadokura, M. Kurashina, K. Mikawa, T.T. Nakamura, J. Odagiri, M. Satoh, T. Suwada, Prog. Theor, Exp. Phys. 2013, 03A008, 2013.

Control System Achievement at KEKB and Upgrade Design for SuperKEKB [pdf],   [slide]
K. Furukawa, A. Akiyama, E. Kadokura, M. Kurashina, K. Mikawa, F. Miyahara, T.T. Nakamura, J. Odagiri, M. Satoh, T. Suwada, T. Kudou, S. Kusano, T. Nakamura, K. Yoshii, T. Okazaki, Proc of ICALEPCS2011, Grenoble, France, October, 2011, pp.17-19, MOBAUST05.

Timing System towards SuperKEKB Controls [pdf]
K. Furukawa, EPICS Collaboration Meeting, Hsinchu, Taiwan, June, 2011.

First Simultaneous Top-up Operation of Three Different Rings In KEK Injector Linac [pdf]
M. Satoh, IUC members, Proc of LINAC2010, Tsukuba, Japan, September, 2010, WE203.

Pulse-to-pulse Beam Modulation and Event-based Beam Feedback Systems at KEKB Linac [pdf],   [slide]
K. Furukawa, M. Satoh, T. Suwada, T.T. Nakamura, Proc of IPAC2010, Kyoto, Japan, May,2010, pp.1271-1273, TUOCMH01.

New Event-based Control System for Simultaneous Top-up Operation at KEKB and PF [pdf],   [poster]
K. Furukawa , M. Satoh, T. Suwada, T.T. Nakamura, T. Kudou, S. Kusano, T. Nakamura, A. Kazakov, Proc of ICALEPCS2009, Kobe, Japan, Oct.2009, pp.762-764, THP052.

EPICS IOC of WindowsXP-based Oscilloscope for Fast BPM Data Acquisition System [pdf],   [poster]
M. Satoh, T. Suwada, K. Furukawa, Y. Hu, T. Kudou, S. Kusano, Proc of ICALEPCS2009, Kobe, Japan, Oct.2009, WEP086.

The Pulsed Magnet System for the Simultaneous Injection of KEK-PF and KEKB Ring [pdf],   [poster]
T. Mimashi, K. Furukawa, N. Iida, K. Kakihara, M. Kikuchi, T. Miyajima, S. Nagahashi, M. Satoh, M. Tawada, A. Ueda, T. Kudo, K. Iwamoto, S. Kodama, A. Sasagawa, N. Ishii, H. Mori, Proc of PAC2009, Vancouver, Canada, May.2009, pp.172-174, MO6PFP018.

Pulse-to-Pulse Switching Injections to Three Rings of Different Energies from a Single Electron Linac at KEK [pdf],   [poster]
N. Iida, K. Furukawa, M. Ikeda, T. Kamitani, M. Kikuchi, E. Kikutani, M. Kobayashi, T. Mimashi, T. Mitsuhashi, T. Miura, Y. Ogawa, Y. Ohnishi, S. Ohsawa, M. Satoh, M. Suetake, T. Suwada, M. Tawada, A. Ueda, Y. Yano, K. Yokoyama, M. Yoshida, Proc of PAC2009, Vancouver, Canada, May.2009, pp.2769-2771, WE6PFP110.

Event-based Timing and Control System for Fast Beam-mode Switching at KEK 8-GeV Linac [pdf],   [poster]
K. Furukawa, M. Satoh, T. Suwada, T. Kudou, S. Kusano, A. Kazakov, L.Y. Zhao, Proc of PAC2009, Vancouver, Canada, May.2009, pp.4797-4799, FR5REP010.

Present Status of the KEK Injector Upgrade for the Fast Beam-Mode Switch [pdf],   [slide]
M. Satoh, IUC members, Proc of LINAC2008, Vancouver, Canada, Sep.2008, pp.416-418, TUP013.

Development of Timing and Control Systems for Fast Beam Switch at KEK 8 GeV Linac [pdf],   [poster]
K. Furukawa, M. Satoh, T. Suwada, T. Kudou, S. Kusano, A. Kazakov, G. Lei, G. Xu, Proc of LINAC2008, Vancouver, Canada, Sep.2008, pp.404-406, TUP009.

Pulse-to-Pulse Mode Switching of KEKB Injector Linac [pdf]
T. Kamitani, K. Yokoyama, T. Sugimura, K. Kakihara, M. Ikeda, A. Shirakawa, S. Ohsawa, T. Suwada, K. Furukawa, M. Satoh, M. Kikuchi, T. Mimashi, N. Iida, Proc of LINAC2008, Vancouver, Canada, Sep.2008, pp.407-409, TUP010.

Design and Performance of Optics for Multi-energy Injector Linac [pdf]
Y. Ohnishi, T. Kamitani, N. Iida, M. Kikuchi, K. Furukawa, M. Satoh, K. Yokoyama, Y. Ogawa, Proc of LINAC2008, Vancouver, Canada, Sep.2008, pp.413-415, TUP012.

Operational Performance of a New Beam-Charge Interlock System for Radiation Safety at the KEKB Injector Linac [pdf]
T. Suwada, E. Kadokura, M. Satoh, K. Furukawa, Proc of LINAC2008, Vancouver, Canada, Sep.2008, pp.579-581, TUP079.

Fast BPM DAQ System Using Windows Oscilloscope-based EPICS IOC [pdf]
M. Satoh, T. Suwada, K. Furukawa, J. Wang, T. Kudou, S. Kusano, Proc of ICALEPCS2007, Knoxville, USA, Oct.2007, pp.469-471, WPPB37.

PLC-based Beam Charge Interlock System for Radiation Safety in the KEKB Injector Linac [pdf]
E. Kadokura, T. Suwada, M. Satoh, K. Furukawa, Proc of ICALEPCS2007, Knoxville, USA, Oct.2007, pp.149-151, TPPA28.

Beam-Based Optics Correction for New Beam Transport Line from LINAC to Photon Factory in KEK [pdf]
N. Iida, M. Kikuchi, Proc of LINAC2006, Knoxville, USA, Aug.2006, pp.85-87, MOP023.

The KEK Injector Upgrade for the Fast Beam-Mode Switch [pdf]
M. Satoh, IUC Members, Proc of EPAC2006, Edinburgh, UK, Jun.2006, pp.855-857, MOPLS124.

New Beam Transport Line from LINAC to Photon Factory in KEK [pdf]
N. Iida, K. Furukawa, M. Ikeda, K. Kakihara, T. Kamitani, M. Kikuchi, Y. Kobayashi, T. Mitsuhashi, Y. Ogawa, M. Satoh, T. Suwada, M. Tawada, K. Yokoyama, Proc of EPAC2006, Edinburgh, UK, Jun.2006, pp.1505-1507, TUPLS010.

Timing System Upgrade for Top-up Injection at KEK Linac [pdf]
K. Furukawa, E. Kadokura, A. Kazakov, M. Satoh, T. Suwada, Proc of EPAC2006, Edinburgh, UK, Jun.2006, pp.3071-3073, THPCH115.


Japanese Articles

Timing system for the KEK e+/e- Injector Linac [pdf]
F. Miyahara, H. Kaji, H. Sugimura, H. Katagiri, M. Satoh, T. Suwada, X. Zhou, R. Zhang, K. Furukawa, T. Matsumoto, T. Miura, M. Yoshida, S. Kusano, T. Kudou, H. Kumano, T. Oofusa, H. Saotome, Proc of PASJ2018, Nagaoka, Japan, Aug.2018, pp.-, WEP082.

Status of event timing system at damping ring SuperKEKB [pdf]
H. Sugimura, H. Kaji, Y. Iitsuka, S. Sasaki, T. Kudou, Y. Onishi, K. Furukawa, T.T. Nakamura, F. Miyahara, M. Satoh, Proc of PASJ2017, Sapporo, Japan, Aug.2017, pp.607-609, TUP094.

Present status of RF monitor system for SuperKEKB injector linac [pdf]
H. Katagiri, M. Akemoto, D. Arakawa, F. Qiu, T. Matsumoto, T. Miura, S. Michizono, Y. Yano, Proc of PASJ2015, Tsuruga, Japan, Aug.2015, pp.814-817, WEP115.

Injection control at SuperKEKB with Event Timing System [pdf],   [slide]
H. Kaji, M. Iwasaki , T. Okazaki , E. Kikutani , S. Kusano, T. Kudo , T. Kobayashi, M. Suetake, M. Tobiyama, T. Nakamura, K. Furukawa, F. Miyahara, Proc of PASJ2013, Nagoya, Japan, Aug.2013, pp.207-211, MOOS06.

RF Monitor Unit for Simultaneous Injection [pdf]
H. Katagiri, D. Arakawa, T. Matsumoto, T. Miura, S. Michizono, Y. Yano, Proc of PASJ2012, Toyonaka, Japan, Aug,2012, pp.753-756, WEPS120.

Injection Beam Scheduling at SuperKEKB Complex through Damping Ring [pdf],   [slide]
K. Furukawa, Y. Funakoshi, M. Kikuchi, E. Kikutani, T.T. Nakamura, K. Oide, M. Satoh, M. Suetake, T. Suwada, Y. Yano Proc of PASJ2010, Himeji, Japan, Aug,2010, pp.293-296, FRSH04.

The Event Timing System in KEK Linac [pdf]
S. Kusano, T. Kudou, K. Furukawa, M. Satoh, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.472-474.

Development of the User Interface for the Event System in KEK Linac [pdf]
T. Kudou, S. Kusano, K. Furukawa, M. Satoh, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.478-480.

Global and Fast Beam Control System for Simultaneous Top-up Injections to 3 Rings at KEKB and PF [pdf]
K. Furukawa, E. Kadokura, A. Kazakov, T. Kudou, S. Kusano, K. Mikawa, T. Nakamura, T.T. Nakamura, M. Satoh, T. Suwada, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.511-513.

Development of the Fast BPM Data Acquisition System Using Windows Oscilloscope-based EPICS IOC [pdf]
M. Satoh, Y. Hu, T. Kudou, S. Kusano, T. Suwada, K. Furukawa, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.714-716.

Pulse-to-pulse Beam Switching System of Electron Gun for 3 Rings Simultaneous Injection [pdf]
M. Ikeda, S. Ohsawa, T. Sugimura, K. Furukawa, M. Satoh, A. Shirakawa, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.475-477.

Upgrade of Readout System for Beam Position Monitors in the KEKB Beam Transport Line [pdf]
T. Aoyama, T. Nakamura, K. Yoshii, N. Iida, M. Satoh, K. Furukawa, T.T. Nakamura, Proc of PASJ2009, Tokai, Japan, Aug.2009, pp.514-517.

Pulse-to-pulse Beam Switch at KEK Electron Linac [pdf]
K. Furukawa, E. Kadokura, A. Kazakov, T. Kudou, S. Kusano, G. Lei, K. Mikawa, T. Nakamura, M. Satoh, T. Suwada, G. Xu, Proc of PASJ2008, Higashihiroshima, Japan, Aug.2008, pp.126-128.

Development of Software for Event System in KEK Linac [pdf]
S. Kusano, T. Kudou, K. Furukawa, M. Satoh, Proc of PASJ2008, Higashihiroshima, Japan, Aug.2008, pp.919-921.


Links

Event-based controls local information (collection of links)

Event modules from MRF

Event modules from SINAP

Internal working logbook


Dual layer accelerator controls with event-based control and EPICS


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Kazuro Furukawa <kazuro.furukawa AT kek.jp>, Nov.16.2010 - Oct.28.2018.
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