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Nicolas HUBERT (SOLEIL)10/06/2024, 09:00
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Laura Torino (ALBA-CELLS)10/06/2024, 09:15
As many other synchrotron light sources, ALBA is also going through an upgrade phase. One of the challenge is the miniaturization of many components among which BPMs.
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In this contribution the development of BPMs for ALBA II from the design to the prototyping will be presented. -
Sergey Strokov (DESY)10/06/2024, 09:40
To ensure the optimal performance of BPMs in synchrotron rings, particularly in PETRA IV, it is important to fully understand the evaluation process of individual feedthroughs and fully assembled BPMs. This involves grouping feedthroughs into sets of four with similar electrical properties and then, after assembling them into a complete BPM device, checking the electrical and mechanical...
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Moussa ELAJJOURI (SOLEIL), Dr Stefano Cleva (Elettra)10/06/2024, 10:05
In order to accommodate the ever increasing expectations of the users, several third-generation Synchrotron light source facilities are going to be upgraded to the fourth-generation.
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To achieve the target performance of such new machines, the design and validation stages related to the beam position monitor detectors have to be deeply investigated through numerical tools such as CST Particle... -
Benoit Roche (ESRF)10/06/2024, 10:30
Since the beginning of the ESRF-EBS storage ring in 2020, 11 BPM are affected by a phenomenon which generates un-physical position measurements, which depends on some beam parameter (mostly filling pattern and total current).
This issue is probably arising from a RF resonance at the BPM measurement frequency (352 MHz) present in the vicinity of the BPM block, inside the vacuum chamber....
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Mr Kees SCHEIDT (ESRF)10/06/2024, 11:20
Four units of Digit-500 device have been delivered and are now being tested and used in both SR and Booster. In addition to the more classical use of (Bunch-by-Bunch) beam position measurements we are also exploring the possibilities of high quality (B-b-B) beam charge and even purity measurements by implementing dedicated firmware in the device.
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Results are very recent and highly encouraging... -
Danilo Bisiach (Instrumentation Technologies doo)10/06/2024, 11:45
The current Libera Photon has been widely used in the past 8 years as an X-ray Beam Position Monitor. To meet the performance requirements of the last-generation light sources, additional features are requested, such as the interfaces to support Fast Orbit Feedback integration. Based on the requirements we are collecting from the field, we conceptualized a new solution and instrument platform...
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Raffaele De Monte (Elettra Sincrotrone Trieste)10/06/2024, 12:10
In this contribution, we present the global system design for Elettra 2.0 eBPM, including machine timing signals and integration with the Elettra control system, and in particular how the new Global Orbit Feedback 2 (GOF2) has greatly simplified the entire software architecture.
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The different functionalities/modalities (first turn, TbT, ecc) will be discussed as well as their implementation.... -
Gabriele Brajnik (Elettra-Sincrotrone Trieste), Stefano Cleva (Elettra)10/06/2024, 12:35
Noise evaluation in modern eBPM systems for accelerators can be a difficult task, since their complexity allows a plethora of noise sources of different types.
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To simplify the calculations during the system design, we propose to split the analysis into two sections: the pickups (as passive devices) and the front-end electronics including the conversion section (as active devices). In the... -
Dr Roman Panas (NSRC SOLARIS)10/06/2024, 15:30
I present the implementation of an enhanced Fast Orbit Feedback (FOFB) system at the SOLARIS synchrotron and the adaptation of the existing Slow Orbit Feedback (SOFB) system to work in tandem without causing saturation of the FOFB corrector magnets.
I also discuss the adjustment of PID parameters and other high-time-resolution measurements to optimize the performance of the feedback system....
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Sven Pfeiffer (DESY)10/06/2024, 15:55
The simulations for the PETRA IV upgrade project of the fast orbit feedback system are underway. The latest modeling and simulation results will be shown and discussed.
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Romain BRONES (SOLEIL)10/06/2024, 16:50
SOLEIL Fast Orbit Feedback has been running on its new platform for user beam since last January.
In this presentation, we will present its integration to the control system and its commissioning.
We have been using this new platform for further identification of the FOFB loop. We will discuss both the method and the results.
The envisioned developments for the future fast archiver...
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Lorraine Bobb (Diamond Light Source)10/06/2024, 17:15
Fourth generation synchrotron light sources require significant advancements in beam stabiltiy, typically on the sub-micron scale. Consequently the performance specification of beam position monitors must similarly advance. This has lead to compensation schemes, used to mitigate position disturbances and drift from the environment, being implemented near the beginning of the rf chain i.e....
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Dr Dima El Khechen (Karlsruhe Institute for Technology)11/06/2024, 09:00Oral presentation
The cSTART project aims to demonstrate the injection of electron beams like from a Laser Plasma Accelerator (LPA) and storage of very short bunches in a very large acceptance storage ring. It will use the linac-based test facility FLUTE as a main injector at early phase and Laser plasma injectors (LPA) later. The combination and range of special beam parameters like low bunch charge (down to 1...
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Cigdem Ozkan Loch (Paul Scherrer Institut)11/06/2024, 09:25Oral presentation
As of September 30th, 2023, the upgrade to the SLS storage ring has commenced. Some of the SLS diagnostics will be integrated with modifications to satisfy the requirements of SLS 2.0, including changes to their quantity, specifications, and technical implementations. Additionally, new diagnostics systems will be installed that have been tested at the SLS. After providing an update on the...
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Niki Vitoratou (Diamond Light Source)11/06/2024, 09:50
The feasibility of using X-ray Fresnel Diffractometry to measure small beam sizes beyond the resolution of the X-ray pinhole cameras is studied. X-ray Fresnel diffractometry employs a single slit with optimised width that produces a double lobe diffraction pattern. The visibility of this double lobe intensity distribution relates to the beam size and promises micron-scale beam size...
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Marie LABAT (SOLEIL)11/06/2024, 10:15
In the frame of SOLEIL-II, we have attempted preliminary tests on SOLEIL-I of low vertical emittance measurements based on the standard pinhole camera imaging system. However, we rapidly faced an unexpected issue: the perturbation of the measurement by some "filaments". It seems that those filaments are due to a parasitic phase contrast imaging induced by our UHV Aluminium window. We will...
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Laura Torino (ALBA-CELLS)11/06/2024, 10:40
Techniques to increase and/or control the vertical emittance are necessary in current and future machine. Different techniques are used in different machines (white noise, side band excitation, coupling resonant excitation) with different results.
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I would like to open a discussion on the methods and the coupling strength and beam centroid stability obtained in each machine. -
Laura Torino (ALBA-CELLS)11/06/2024, 11:30
Emittance measurements using synchrotron radiation are usually performed using x-rays to avoid diffraction limits. Interferometric techniques using visible light are also used to measure either the horizontal or the vertical beam projection. Several measurements rotating the interferometry axis are needed to obtain a full beam reconstruction.
We present a new interferometric aperture...
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Irma Shmidt (Helmholtz-Zentrum Berlin)11/06/2024, 11:55
As BESSY II uses complex filling patterns for standard operation as well as other modes of operation, it is necessary to have bunch-resolved diagnostic tools. While a streak camera has been successfully used for the longitudinal electron-beam diagnostics a fast-gated ICCD camera is being implemented on the neighbouring beamline to provide bunch-resolved diagnostics in the transverse...
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Alexandre MOUTARDIER (SOLEIL)11/06/2024, 12:15
In the scope of SOLEIL II, the booster must also be upgraded to reduce from 130 to 5 nm.rad the emittance of the beam delivered to the ring.
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Control of the emittance in the booster will become crucial to ensure the nominal performance of the storage ring injection.
The SOLEIL I booster is already equipped with a Visible Synchrotron Radiation Monitor (MRSV). This equipment, made of an... -
Pauline Ahmels (Helmholtz-Zentrum-Berlin)11/06/2024, 12:40
A third branch at the booster optical beamline has recently installed for research and development studies. Topic should cover beam characterisation and the accelerator physics university seminar. A CMOS camera aided by programble lens and mirrors replicate the existing source point imaging diagnostics.
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During the studies it has been found that the polarisation shows non-linear... -
Mr Peter Leban (Instrumentation Technologies d.o.o)11/06/2024, 14:00
Over the last few years some institutes had been using network boot on Libera instruments successfully. Latest OS release of platform B Libera instruments can be boot over network but some issues have been identified. What are most common issues, bottlenecks or experience in general from the community?
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Secondly; libera software and its interfaces is becoming available to more and more users.... -
Mr Kees SCHEIDT (ESRF)11/06/2024, 14:20Oral presentation
The 6GeV electron beam shows since long tiny variations of its energy that can now be measured by a suitable use & treatment of the horizontal position from (128) dispersive BPMs, and also more recently by a simple X-ray detector installed on an available X-ray beam port equipped with a 3-pole wiggler. These 2 fully independent results are now recorded permanently and their analysis allows to...
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Gero Kube (Deutsches Elektronen-Synchrotron DESY)11/06/2024, 14:45Oral presentation
Beam lifetime measurements are an important tool to characterize the key storage ring and machine performance parameters. They are usually derived from the dc current transformer (DCCT) data, and their accuracy depends on DCCT noise and data duration period. However, accurate dc current and fast lifetime determination are in contradiction and have to be balanced carefully. In this...
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Kai Demmler (DESY (Deutsches Elektronen-Synchrotron))11/06/2024, 15:10Oral presentation
This talk will cover the development of a bucket resolved charge measurement based on synchrotron radiation in the optical regime. The topics are the selection of an adequate detector for short light pulses, the optical setup and the digital readout system. As the measurement is planned as an upgrade of the actual online measurement an overview on tasks and challenges of building a long term...
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