IBIC2014 - List of Keywords (FPGA)

Paper	Title	Other Keywords	Page
MOPD04	Synchronisation of the LHC Betatron Coupling and Phase Advance Measurement System	timing, detector, betatron, controls	139
	J. Olexa, M. Gąsior CERN, Geneva, Switzerland
	The new LHC Diode ORbit and OScillation (DOROS) system will provide beam position readings with sub-micrometre resolution and at the same time will be able to perform measurements of local betatron coupling and beam phase advance with micrometre beam excitation. The oscillation sub-system employs gain-controlled RF amplifiers, shared with the orbit system, and followed by dedicated diode detectors to demodulate the beam oscillation signals into the kHz frequency range, subsequently digitized by multi-channel 24-bit ADCs. The digital signals are processed in each front-end with an FPGA and the results of reduced throughput are sent using an Ethernet protocol to a common concentrator, together with the orbit data. The phase advance calculation between multiple Beam Position Monitors (BPMs) requires that all DOROS front-ends have a common phase reference. This paper presents methods used to generate such a reference and to maintain a stable synchronous sampling on all system front-ends. The performance of the DOROS prototype synchronisation is presented based upon laboratory measurements.
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MOPD23	Development Status of SINAP Timing System	timing, software, network, PLC	199
	M. Liu, K.C. Chu, C.X. Yin, L.Y. Zhao SINAP, Shanghai, People's Republic of China
	After successful implementation of SINAP timing solution at Pohang Light Source in 2011, we started to upgrade SINAP timing system to version 2. The hardware of SINAP v2 timing system is based on Virtex-6 FPGA chip, and bidirectional event frame transfer is realized in a 2.5Gbps fiber-optic network. In event frame, data transfer functionality substitutes for distributed bus. The structure of timing system is also modified, where a new versatile EVO could be configured as EVG, FANOUT or EVR with optical outputs. Besides standard VME modules, we designed PLC-EVR as well, which is compatible with Yokogawa F3RP61 series. Based on brand new hardware architecture, the jitter performance of SINAP v2 timing system is improved remarkably.
	Poster MOPD23 [4.282 MB]
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TUPF27	Optical System for ESS Target Protection	proton, target, operation, radiation	389
	C.A. Thomas, M. Donna, T.J. Grandsaert, M. Göhran, R. Linander, T.J. Shea ESS, Lund, Sweden
	One specificity of the ESS accelerator and target is that a high power and ultra low emittance proton beam is sent straight onto a Tungsten target. The high power density proton beam from the ESS linac will damage any material it meets. Thus a strategy to protect the target and the target area has to be deployed: the proton beam on target will be defocused and swept, distributing homogeneously the power density on an area 10⁴ times larger than its non defocused area. On its way towards the target, the beam goes through two windows: the proton beam window (PBW) separating the high vacuum of the accelerator to the 1-bar He filled area of the target monolith; and the target window (TW) marking the entrance area of the target wheel. In this paper, we present the PBW imaging system, one of the proton beam diagnostics to be developed for imaging the proton beam current density deposited in the PBW. We will describe the expected performance of the imaging system in order to satisfy the PBW protection requirement. We will also describe the radiative processes which could be used as the source of the imaging system. Finally, we will describe the necessary condition and hardware for the implementation of a protection system for both the PBW and TW.
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TUPD10	An Ultrafast Linear Array Detector for Single-Shot Electro-Optical Bunch Profile Measurements	detector, synchrotron, laser, radiation	435
	L. Rota, C.M. Caselle, N. Hiller, A.-S. Müller, M. Weber KIT, Eggenstein-Leopoldshafen, Germany
	A new spectrometer system has been developed at ANKA for near-field single-shot Electro-Optical (EO) bunch profile measurements with a frame rate of 5 Mfps. The frame rate of commercial line detectors is limited to several tens of kHz, unsuitable for measuring fast dynamic changes of the bunch conditions. The new system aims to realize continuous data acquisition and over long observation periods without dead time. InGaAs or Si linear array pixel sensors are used to detect the near IR and visible spectrum radiation. The detector signals are fed via wire-bonding connections to the GOTTHARD ASIC, a charge-sensitive amplifier with analog outputs. The front-end board is also equipped with an array of fast ADCs. The digital samples are then acquired by an FPGA-based readout card and transmitted to an external DAQ system via a high-speed PCI-Express data link. The DAQ system uses high-end Graphics Processors Units (GPUs) to perform a real-time analysis of the beam conditions. In this paper we present the concept, the first prototype and the low-noise layout techniques used for fast linear detectors.
	Poster TUPD10 [5.159 MB]
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TUPD11	LANSCE 1L Harp Data Acquisition System Upgrade	data-acquisition, electron, software, hardware	438
	J.D. Sedillo, J.D. Gilpatrick, J.D. Nguyen LANL, Los Alamos, New Mexico, USA M.E. Gruchalla URS, Albuquerque, New Mexico, USA
	The 1L harp is the last beam diagnostic preceding LANSCE’s 1L Target, the neutron source of LANSCE’s Lujan Center, and consists of two orthogonal planes of stationary sense wires for monitoring the beam distribution prior to its arrival at the target. A new data acquisition system has been developed for the 1L harp that features a National Instruments CompactRIO contained within a BiRIO chassis hosting electronic circuits for signal conditioning and a new feature for sense wire integrity monitoring. Hardware design, software architecture, and preliminary data acquisition results will be described.
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WECYB3	Status of the Sirius RF BPM Electronics	electronics, hardware, storage-ring, feedback	505
	S.R. Marques, R.A. Baron, G.B.M. Bruno, F.H. Cardoso, L.A. Martins, J.L.B. Neto, L.M. Russo, D.O. Tavares LNLS, Campinas, Brazil
	A modular and open-source RF BPM electronics based on the PICMG(R) MicroTCA.4 and ANSI/VITA 57.1 FMC standards has been developed to be used at Sirius, a 3 GeV low emittance synchrotron light source under construction in Brazil. This paper reports on the latest development advances focusing on bench tests of the second version of the RF front-end and evaluation of the electronics with beam at SPEAR3 (SSRL/SLAC). The interface of the BPM electronics with the orbit feedback system is also discussed.
	Slides WECYB3 [3.265 MB]
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WEPF02	A Toroid Based Bunch Charge Monitor System with Machine Protection Features for FLASH and XFEL	timing, diagnostics, operation, controls	521
	M. Werner, T. Lensch, J. Lund-Nielsen, Re. Neumann, D. Nölle, N. Wentowski DESY, Hamburg, Germany
	For the superconducting linear accelerators FLASH and XFEL, a new toroid based charge measurement system has been designed as a standard diagnostic tool. It is also a sensor for the bunch charge stabilization feedback and for machine protection. The system is based on MTCA.4 technology and will offer a high dynamic range and high sensitivity. The machine protection features will cover recognition of poor transmission between adjacent toroid sensors, bunch pattern consistency checks, and protection of the beam dumps. The concept, an overview of the algorithms, and the implementation will be described. A summary of first operation experience at FLASH will be presented.
	Poster WEPF02 [1.113 MB]
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WEPD05	Improvement of Data Transfer Speed of Large Memory Monitors	Ethernet, EPICS, injection, operation	642
	M. Tobiyama KEK, Ibaraki, Japan
	Beam monitors with long memories will be widely used in SuperKEKB accelerators. Since the slow data transfer time of such devices usually limit the operational performance, improvement of the transfer rate is required. Two kind of devices, VME-based module and Ethernet-based modules has been developed. On the VME-based devices such as turn-by-turn position monitors for damping ring or long bunch oscillation monitors, MBLT and BLT transfer method has been implemented. For the Ethernet based system, the gated turn-by-turn monitors, SiTCP has been implemented on the FPGA and the EPICS device support for SiTCP has been developed. The improvement of the data transfer speed with the long-term reliability will be presented.
	Poster WEPD05 [1.791 MB]
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WEPD09	Development of a High Speed Beam Position and Phase Monitoring System for the LANSCE Linac	timing, EPICS, network, linac	655
	H.A. Watkins, J.D. Gilpatrick, R.C. McCrady LANL, Los Alamos, New Mexico, USA
	Funding: Work supported by the U.S. Department of Energy. The Los Alamos Neutron Science Center (LANSCE) is currently developing beam position and phase measurements (BPPMs) as part of the LANSCE risk mitigation project. BPPM sensors have been installed in the 805-MHz linac and development of the monitoring electronics is near completion. The system utilizes a high speed digitizer coupled with a field programmable gate array (FPGA) mounted in a VPX chassis to measure position, phase and intensity of a variety of beam structures. These systems will be deployed throughout the LANSCE facility. Details of the hardware selection and performance of the system for different timing structures are presented.
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WEPD11	Beam-Based Calibration and Performance Optimization of Cavity BPMs for SwissFEL, E-XFEL and FLASH2	pick-up, electronics, undulator, alignment	665
	B. Keil, G. Marinkovic, M. Stadler PSI, Villigen PSI, Switzerland D. Lipka DESY, Hamburg, Germany
	Funding: Part of this work was funded by the Swiss State Secretariat for Education, Research and Innovation (SERI). SwissFEL, the European XFEL (E-XFEL) and FLASH2 all use dual-resonator cavity beam position monitors (CBPMs). The CBPM electronics that is built by PSI has a larger number of calibration parameters that need to be determined in order to maximize the CBPM system performance. Beam measurements with the BPM electronics have been made in BPM test areas at the SwissFEL test injector and FLASH, as well as at FLASH2 where 17 E-XFEL type CBPMs have recently been installed in the undulator intersections [,]. The CBPMs are pre-calibrated in the lab using an automated test and calibration system [], and then the final calibration is done with beam. This report discusses beam-based methods to optimize the system performance by improving the pre-beam system calibration as well as the mechanical alignment of the pickup position and angle. D. Lipka et al., "FLASH Undulator BPM Commissioning and Beam Characterization Results", IBIC'14 ** M. Stadler et al., "Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL", IBIC'14
	Poster WEPD11 [0.445 MB]
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WEPD23	Commissioning of the ALBA Fast Orbit Feedback System	kicker, feedback, injection, controls	691
	A. Olmos, S. Blanch-Torné, G. Cuní, Z. Martí, J. Moldes, R. Petrocelli, S. Rubio-Manrique, X. Serra-Gallifa, D. Yépez ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	The ALBA Fast Orbit FeedBack system (FOFB) started its commissioning phase in September 2013, when all the required hardware was installed and the development of different controls for the feedback started. This report shows our experience tuning the different parameters to setup the system, together with vibration and beam noise measurements at different conditions. Finally, the present results and future steps for this system are described.
	Poster WEPD23 [0.902 MB]
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WEPD24	New Features and Measurements using the Upgraded Transverse Multibunch Feedback at Diamond	feedback, damping, betatron, experiment	696
	G. Rehm, M.G. Abbott, A.F.D. Morgan DLS, Oxfordshire, United Kingdom
	A Transverse Multi-Bunch Feedback has been used in the Diamond Storage Ring for the stabilization of instabilities since 2007. Following a recent upgrade of the FPGA code and EPICS layer, a set of new features is now available to support operation and machine development: Firstly, a bunch by bunch choice of feedback filter allows for better stabilization of a single high charge bunch in a hybrid fill pattern. Secondly, complex grow-damp experiments are now possible using a sequencer of internal states allowing precise measurements of the damping rates on a mode by mode basis. Thirdly, a phase locked loop excitation and detection has been implemented to allow both extremely fast (kHz update rates) and extremely precise tracking of the betatron tune frequencies. Finally, short FIR filters on the ADC input and DAC output enable a fine tuning of the impulse response to provide maximum bunch to bunch isolation, as for instance required for efficient bunch cleaning.
	Poster WEPD24 [1.977 MB]
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Paper

Title

Other Keywords

Page

MOPD04

Synchronisation of the LHC Betatron Coupling and Phase Advance Measurement System

timing, detector, betatron, controls

139

J. Olexa, M. Gąsior
CERN, Geneva, Switzerland

The new LHC Diode ORbit and OScillation (DOROS) system will provide beam position readings with sub-micrometre resolution and at the same time will be able to perform measurements of local betatron coupling and beam phase advance with micrometre beam excitation. The oscillation sub-system employs gain-controlled RF amplifiers, shared with the orbit system, and followed by dedicated diode detectors to demodulate the beam oscillation signals into the kHz frequency range, subsequently digitized by multi-channel 24-bit ADCs. The digital signals are processed in each front-end with an FPGA and the results of reduced throughput are sent using an Ethernet protocol to a common concentrator, together with the orbit data. The phase advance calculation between multiple Beam Position Monitors (BPMs) requires that all DOROS front-ends have a common phase reference. This paper presents methods used to generate such a reference and to maintain a stable synchronous sampling on all system front-ends. The performance of the DOROS prototype synchronisation is presented based upon laboratory measurements.

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MOPD23

Development Status of SINAP Timing System

timing, software, network, PLC

199

M. Liu, K.C. Chu, C.X. Yin, L.Y. Zhao
SINAP, Shanghai, People's Republic of China

After successful implementation of SINAP timing solution at Pohang Light Source in 2011, we started to upgrade SINAP timing system to version 2. The hardware of SINAP v2 timing system is based on Virtex-6 FPGA chip, and bidirectional event frame transfer is realized in a 2.5Gbps fiber-optic network. In event frame, data transfer functionality substitutes for distributed bus. The structure of timing system is also modified, where a new versatile EVO could be configured as EVG, FANOUT or EVR with optical outputs. Besides standard VME modules, we designed PLC-EVR as well, which is compatible with Yokogawa F3RP61 series. Based on brand new hardware architecture, the jitter performance of SINAP v2 timing system is improved remarkably.

Poster MOPD23 [4.282 MB]

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TUPF27

Optical System for ESS Target Protection

proton, target, operation, radiation

389

C.A. Thomas, M. Donna, T.J. Grandsaert, M. Göhran, R. Linander, T.J. Shea
ESS, Lund, Sweden

One specificity of the ESS accelerator and target is that a high power and ultra low emittance proton beam is sent straight onto a Tungsten target. The high power density proton beam from the ESS linac will damage any material it meets. Thus a strategy to protect the target and the target area has to be deployed: the proton beam on target will be defocused and swept, distributing homogeneously the power density on an area 10⁴ times larger than its non defocused area. On its way towards the target, the beam goes through two windows: the proton beam window (PBW) separating the high vacuum of the accelerator to the 1-bar He filled area of the target monolith; and the target window (TW) marking the entrance area of the target wheel. In this paper, we present the PBW imaging system, one of the proton beam diagnostics to be developed for imaging the proton beam current density deposited in the PBW. We will describe the expected performance of the imaging system in order to satisfy the PBW protection requirement. We will also describe the radiative processes which could be used as the source of the imaging system. Finally, we will describe the necessary condition and hardware for the implementation of a protection system for both the PBW and TW.

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TUPD10

An Ultrafast Linear Array Detector for Single-Shot Electro-Optical Bunch Profile Measurements

detector, synchrotron, laser, radiation

435

L. Rota, C.M. Caselle, N. Hiller, A.-S. Müller, M. Weber
KIT, Eggenstein-Leopoldshafen, Germany

A new spectrometer system has been developed at ANKA for near-field single-shot Electro-Optical (EO) bunch profile measurements with a frame rate of 5 Mfps. The frame rate of commercial line detectors is limited to several tens of kHz, unsuitable for measuring fast dynamic changes of the bunch conditions. The new system aims to realize continuous data acquisition and over long observation periods without dead time. InGaAs or Si linear array pixel sensors are used to detect the near IR and visible spectrum radiation. The detector signals are fed via wire-bonding connections to the GOTTHARD ASIC, a charge-sensitive amplifier with analog outputs. The front-end board is also equipped with an array of fast ADCs. The digital samples are then acquired by an FPGA-based readout card and transmitted to an external DAQ system via a high-speed PCI-Express data link. The DAQ system uses high-end Graphics Processors Units (GPUs) to perform a real-time analysis of the beam conditions. In this paper we present the concept, the first prototype and the low-noise layout techniques used for fast linear detectors.

Poster TUPD10 [5.159 MB]

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TUPD11

LANSCE 1L Harp Data Acquisition System Upgrade

data-acquisition, electron, software, hardware

438

J.D. Sedillo, J.D. Gilpatrick, J.D. Nguyen
LANL, Los Alamos, New Mexico, USA
M.E. Gruchalla
URS, Albuquerque, New Mexico, USA

The 1L harp is the last beam diagnostic preceding LANSCE’s 1L Target, the neutron source of LANSCE’s Lujan Center, and consists of two orthogonal planes of stationary sense wires for monitoring the beam distribution prior to its arrival at the target. A new data acquisition system has been developed for the 1L harp that features a National Instruments CompactRIO contained within a BiRIO chassis hosting electronic circuits for signal conditioning and a new feature for sense wire integrity monitoring. Hardware design, software architecture, and preliminary data acquisition results will be described.

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WECYB3

Status of the Sirius RF BPM Electronics

electronics, hardware, storage-ring, feedback

505

S.R. Marques, R.A. Baron, G.B.M. Bruno, F.H. Cardoso, L.A. Martins, J.L.B. Neto, L.M. Russo, D.O. Tavares
LNLS, Campinas, Brazil

A modular and open-source RF BPM electronics based on the PICMG(R) MicroTCA.4 and ANSI/VITA 57.1 FMC standards has been developed to be used at Sirius, a 3 GeV low emittance synchrotron light source under construction in Brazil. This paper reports on the latest development advances focusing on bench tests of the second version of the RF front-end and evaluation of the electronics with beam at SPEAR3 (SSRL/SLAC). The interface of the BPM electronics with the orbit feedback system is also discussed.

Slides WECYB3 [3.265 MB]

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WEPF02

A Toroid Based Bunch Charge Monitor System with Machine Protection Features for FLASH and XFEL

timing, diagnostics, operation, controls

521

M. Werner, T. Lensch, J. Lund-Nielsen, Re. Neumann, D. Nölle, N. Wentowski
DESY, Hamburg, Germany

For the superconducting linear accelerators FLASH and XFEL, a new toroid based charge measurement system has been designed as a standard diagnostic tool. It is also a sensor for the bunch charge stabilization feedback and for machine protection. The system is based on MTCA.4 technology and will offer a high dynamic range and high sensitivity. The machine protection features will cover recognition of poor transmission between adjacent toroid sensors, bunch pattern consistency checks, and protection of the beam dumps. The concept, an overview of the algorithms, and the implementation will be described. A summary of first operation experience at FLASH will be presented.

Poster WEPF02 [1.113 MB]

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WEPD05

Improvement of Data Transfer Speed of Large Memory Monitors

Ethernet, EPICS, injection, operation

642

M. Tobiyama
KEK, Ibaraki, Japan

Beam monitors with long memories will be widely used in SuperKEKB accelerators. Since the slow data transfer time of such devices usually limit the operational performance, improvement of the transfer rate is required. Two kind of devices, VME-based module and Ethernet-based modules has been developed. On the VME-based devices such as turn-by-turn position monitors for damping ring or long bunch oscillation monitors, MBLT and BLT transfer method has been implemented. For the Ethernet based system, the gated turn-by-turn monitors, SiTCP has been implemented on the FPGA and the EPICS device support for SiTCP has been developed. The improvement of the data transfer speed with the long-term reliability will be presented.

Poster WEPD05 [1.791 MB]

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WEPD09

Development of a High Speed Beam Position and Phase Monitoring System for the LANSCE Linac

timing, EPICS, network, linac

655

H.A. Watkins, J.D. Gilpatrick, R.C. McCrady
LANL, Los Alamos, New Mexico, USA

Funding: Work supported by the U.S. Department of Energy.
The Los Alamos Neutron Science Center (LANSCE) is currently developing beam position and phase measurements (BPPMs) as part of the LANSCE risk mitigation project. BPPM sensors have been installed in the 805-MHz linac and development of the monitoring electronics is near completion. The system utilizes a high speed digitizer coupled with a field programmable gate array (FPGA) mounted in a VPX chassis to measure position, phase and intensity of a variety of beam structures. These systems will be deployed throughout the LANSCE facility. Details of the hardware selection and performance of the system for different timing structures are presented.

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WEPD11

Beam-Based Calibration and Performance Optimization of Cavity BPMs for SwissFEL, E-XFEL and FLASH2

pick-up, electronics, undulator, alignment

665

B. Keil, G. Marinkovic, M. Stadler
PSI, Villigen PSI, Switzerland
D. Lipka
DESY, Hamburg, Germany

Funding: Part of this work was funded by the Swiss State Secretariat for Education, Research and Innovation (SERI).
SwissFEL, the European XFEL (E-XFEL) and FLASH2 all use dual-resonator cavity beam position monitors (CBPMs). The CBPM electronics that is built by PSI has a larger number of calibration parameters that need to be determined in order to maximize the CBPM system performance. Beam measurements with the BPM electronics have been made in BPM test areas at the SwissFEL test injector and FLASH, as well as at FLASH2 where 17 E-XFEL type CBPMs have recently been installed in the undulator intersections [*,**]. The CBPMs are pre-calibrated in the lab using an automated test and calibration system [**], and then the final calibration is done with beam. This report discusses beam-based methods to optimize the system performance by improving the pre-beam system calibration as well as the mechanical alignment of the pickup position and angle.
* D. Lipka et al., "FLASH Undulator BPM Commissioning and Beam Characterization Results", IBIC'14
** M. Stadler et al., "Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL", IBIC'14

Poster WEPD11 [0.445 MB]

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WEPD23

Commissioning of the ALBA Fast Orbit Feedback System

kicker, feedback, injection, controls

691

A. Olmos, S. Blanch-Torné, G. Cuní, Z. Martí, J. Moldes, R. Petrocelli, S. Rubio-Manrique, X. Serra-Gallifa, D. Yépez
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

The ALBA Fast Orbit FeedBack system (FOFB) started its commissioning phase in September 2013, when all the required hardware was installed and the development of different controls for the feedback started. This report shows our experience tuning the different parameters to setup the system, together with vibration and beam noise measurements at different conditions. Finally, the present results and future steps for this system are described.

Poster WEPD23 [0.902 MB]

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WEPD24

New Features and Measurements using the Upgraded Transverse Multibunch Feedback at Diamond

feedback, damping, betatron, experiment

696

G. Rehm, M.G. Abbott, A.F.D. Morgan
DLS, Oxfordshire, United Kingdom

A Transverse Multi-Bunch Feedback has been used in the Diamond Storage Ring for the stabilization of instabilities since 2007. Following a recent upgrade of the FPGA code and EPICS layer, a set of new features is now available to support operation and machine development: Firstly, a bunch by bunch choice of feedback filter allows for better stabilization of a single high charge bunch in a hybrid fill pattern. Secondly, complex grow-damp experiments are now possible using a sequencer of internal states allowing precise measurements of the damping rates on a mode by mode basis. Thirdly, a phase locked loop excitation and detection has been implemented to allow both extremely fast (kHz update rates) and extremely precise tracking of the betatron tune frequencies. Finally, short FIR filters on the ADC input and DAC output enable a fine tuning of the impulse response to provide maximum bunch to bunch isolation, as for instance required for efficient bunch cleaning.

Poster WEPD24 [1.977 MB]

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