ICALEPCS2011 - List of Authors (Furukawa, K.)

Paper

Title

Page

Control System Achievement at KEKB and Upgrade Design for SuperKEKB

17

K. Furukawa, A. Akiyama, E. Kadokura, M. Kurashina, K. Mikawa, F. Miyahara, T.T. Nakamura, J.-I. Odagiri, M. Satoh, T. Suwada
KEK, Ibaraki, Japan
T. Kudou, S. Kusano, T. Nakamura, K. Yoshii
MELCO SC, Tsukuba, Japan
T. Okazaki
EJIT, Hitachi, Ibaraki, Japan

SuperKEKB electron-positron asymmetric collider is being constructed after a decade of successful operation at KEKB for B physics research. KEKB completed all of the technical milestones, and had offered important insights into the flavor structure of elementary particles, especially the CP violation. The combination of scripting languages at the operation layer and EPICS at the equipment layer had led the control system to successful performance. The new control system in SuperKEKB will continue to employ those major features of KEKB, with additional technologies for the reliability and flexibility. The major structure will be maintained especially the online linkage to the simulation code and slow controls. However, as the design luminosity is 40-times higher than that of KEKB, several orders of magnitude higher performance will be required at certain area. At the same time more controllers with embedded technology will be installed to meet the limited resources.

Slides MOBAUST05 [2.781 MB]

MOPMS029

The BPM DAQ System Upgrade for SuperKEKB Injector Linac

389

M. Satoh, K. Furukawa, F. Miyahara, T. Suwada
KEK, Ibaraki, Japan
T. Kudou, S. Kusano
MELCO SC, Tsukuba, Japan

The KEK injector linac provides beams with four different rings: a KEKB high-energy ring (HER; 8 GeV/electron), a KEKB low-energy ring (LER; 3.5 GeV/positron), a Photon Factory ring (PF; 2.5 GeV/electron), and an Advanced Ring for Pulse X-rays (PF-AR; 3 GeV/electron). For the three rings except PF-AR, the simultaneous top-up injection has been completed since April 2009. In the simultaneous top-up operation, the common DC magnet settings are utilized for the beams with different energies and amount of charges, whereas the different optimized settings of RF timing and phase are applied to each beam acceleration by using a fast low-level RF (LLRF) phase and trigger delay control up to 50 Hz. The non-destructive beam position monitor (BPM) is an indispensable diagnostic tool for the stable beam operation. In the KEK Linac, approximately nineteen BPMs with the strip-line type electrodes are used for the beam orbit measurement and feedback. In addition, some of them are also used for the beam energy feedback loops. The current DAQ system consists of the digital oscilloscopes (Tektronix DPO7104, 10 GSa/s). A signal from each electrode is analyzed with a predetermined response function up to 50 Hz. The beam position resolution of the current system is limited to about 0.1 mm because of ADC resolution. For the SuperKEKB project, we have a plan to upgrade the BPM DAQ system since the Linac should provide the smaller emittance beam. We will report on the system description of the new DAQ system and the results of performance test in detail.

Poster MOPMS029 [3.981 MB]

THDAULT05

Embedded LLRF Controller with Channel Access on MicroTCA Backplane Interconnect

1274

K. Furukawa, K. Akai, T. Kobayashi, S. Michizono, T. Miura, K. Nakanishi, J.-I. Odagiri
KEK, Ibaraki, Japan
H. Deguchi, K. Hayashi, M. Ryoshi
Mitsubishi Electric TOKKI Systems, Amagasaki, Hyogo, Japan

A low-level RF controller has been developed for the accelerator controls for SuperKEKB, Super-conducting RF Test facility (STF) and Compact-ERL (cERL) at KEK. The feedback mechanism will be performed on Vertex-V FPGA with 16-bit ADCs and DACs. The card was designed as an advanced mezzanine card (AMC) for a MicroTCA shelf. An embedded EPICS IOC on the PowerPC core in FPGA will provide the global controls through channel access (CA) protocol on the backplane interconnect of the shelf. No other mechanisms are required for the external linkages. CA is exclusively employed in order to communicate with central controls and with an embedded IOC on a Linux-based PLC for slow controls.

Slides THDAULT05 [1.780 MB]

Paper	Title	Page
MOBAUST05	Control System Achievement at KEKB and Upgrade Design for SuperKEKB	17
	K. Furukawa, A. Akiyama, E. Kadokura, M. Kurashina, K. Mikawa, F. Miyahara, T.T. Nakamura, J.-I. Odagiri, M. Satoh, T. Suwada KEK, Ibaraki, Japan T. Kudou, S. Kusano, T. Nakamura, K. Yoshii MELCO SC, Tsukuba, Japan T. Okazaki EJIT, Hitachi, Ibaraki, Japan
	SuperKEKB electron-positron asymmetric collider is being constructed after a decade of successful operation at KEKB for B physics research. KEKB completed all of the technical milestones, and had offered important insights into the flavor structure of elementary particles, especially the CP violation. The combination of scripting languages at the operation layer and EPICS at the equipment layer had led the control system to successful performance. The new control system in SuperKEKB will continue to employ those major features of KEKB, with additional technologies for the reliability and flexibility. The major structure will be maintained especially the online linkage to the simulation code and slow controls. However, as the design luminosity is 40-times higher than that of KEKB, several orders of magnitude higher performance will be required at certain area. At the same time more controllers with embedded technology will be installed to meet the limited resources.
	Slides MOBAUST05 [2.781 MB]

MOPMS029	The BPM DAQ System Upgrade for SuperKEKB Injector Linac	389
	M. Satoh, K. Furukawa, F. Miyahara, T. Suwada KEK, Ibaraki, Japan T. Kudou, S. Kusano MELCO SC, Tsukuba, Japan
	The KEK injector linac provides beams with four different rings: a KEKB high-energy ring (HER; 8 GeV/electron), a KEKB low-energy ring (LER; 3.5 GeV/positron), a Photon Factory ring (PF; 2.5 GeV/electron), and an Advanced Ring for Pulse X-rays (PF-AR; 3 GeV/electron). For the three rings except PF-AR, the simultaneous top-up injection has been completed since April 2009. In the simultaneous top-up operation, the common DC magnet settings are utilized for the beams with different energies and amount of charges, whereas the different optimized settings of RF timing and phase are applied to each beam acceleration by using a fast low-level RF (LLRF) phase and trigger delay control up to 50 Hz. The non-destructive beam position monitor (BPM) is an indispensable diagnostic tool for the stable beam operation. In the KEK Linac, approximately nineteen BPMs with the strip-line type electrodes are used for the beam orbit measurement and feedback. In addition, some of them are also used for the beam energy feedback loops. The current DAQ system consists of the digital oscilloscopes (Tektronix DPO7104, 10 GSa/s). A signal from each electrode is analyzed with a predetermined response function up to 50 Hz. The beam position resolution of the current system is limited to about 0.1 mm because of ADC resolution. For the SuperKEKB project, we have a plan to upgrade the BPM DAQ system since the Linac should provide the smaller emittance beam. We will report on the system description of the new DAQ system and the results of performance test in detail.
	Poster MOPMS029 [3.981 MB]

THDAULT05	Embedded LLRF Controller with Channel Access on MicroTCA Backplane Interconnect	1274
	K. Furukawa, K. Akai, T. Kobayashi, S. Michizono, T. Miura, K. Nakanishi, J.-I. Odagiri KEK, Ibaraki, Japan H. Deguchi, K. Hayashi, M. Ryoshi Mitsubishi Electric TOKKI Systems, Amagasaki, Hyogo, Japan
	A low-level RF controller has been developed for the accelerator controls for SuperKEKB, Super-conducting RF Test facility (STF) and Compact-ERL (cERL) at KEK. The feedback mechanism will be performed on Vertex-V FPGA with 16-bit ADCs and DACs. The card was designed as an advanced mezzanine card (AMC) for a MicroTCA shelf. An embedded EPICS IOC on the PowerPC core in FPGA will provide the global controls through channel access (CA) protocol on the backplane interconnect of the shelf. No other mechanisms are required for the external linkages. CA is exclusively employed in order to communicate with central controls and with an embedded IOC on a Linux-based PLC for slow controls.
	Slides THDAULT05 [1.780 MB]