DESY is glad to host the third "Diagnostics Experts of European Light Sources" (DEELS) workshop.
The goal of the workshop is to bring the diagnostics community together, to discuss common problems, share new developments, and enhance synergies between different facilities.
There is no registration fee for the workshop, but costs of accommodation and transportation of each participant shall be covered by their home institute.
We hope that this third edition will also become a suitable occasion for a fruitful, fluid and pleasant way of sharing our working experience.
This presentation shows the latest results obtained using the visible
light interferometry at ALBA.
On one side, we describe how the transverse beam shape can be
reconstructed and detect beam tilts; and secondly, we present the first
(qualitative) measurements of the bunch-by-bunch beam size.
DIAMOND pinhole camera - update on changes30mSeminar Room 1
Diamond is currently building a longitudinal bunch-by-bunch feedback. The electronics for that are based on COTS parts in uTCA, providing 500MS/s 14bit ADC and DAC, Virtex7 FPGA and 4 core Xeon Processor.
We report on where we are on the project.
There is a population of instruments built around Zynq7020 covering
several applications: beam position (storage ring, linear), photon beam
position, beam loss monitoring and as simple as digitizer.
Laboratories, such as INFN, SPring-8 and PAL require higher sampling
rates, more flexibility in the analog front-end and wider choice of
connectivity (e.g. optical). The next generation of Zynq XX based
instruments might be built as independent digital and analog front-end
while retaining the software infrastructure that supports EPICS, TANGO
and other clients out of the box.
Possible candidates are the cavity BPM electronics and multi-channel
digitizer, both with 250 MHz to 500 MHz sampling rates and optional
exchangeable analog front end.
Test results of the new BPM electronics for the extra BPMs in EBS-ESRF30mSeminar Room 1
By modulating the cavity RF phase at twice synchrotron frequency, bunches can be lengthen and shortened. We have done this both in normal optics (17ps bunch length) and in low-alpha optics (3ps bunch length).
The effects can be nicely observed on the streak camera.
(Diamond Light Source)
ALBA BLM studies and historical analysis30mSeminar Room 1
During 5 years of operation in the 3 GeV storage ring of ALBA, the 124
beam loss monitors have provided measurements of relative losses around
the machine, with around 10% of breakdown units. We analyzed these
failures and correlate the integrated received dose with any special
conditions of each BLM location which might have led to their breakdown.
We also show studies of beam losses in the insertion devices, with
particular attention to the results in the MPW, where the vacuum chamber
is (suspected to be) misaligned and high BLMs counts are detected.
Development of new BLM system with both new detector heads and signal acquisition system45mSeminar Room 1
The Solaris is a third generation light source constructed in Poland consisting of a 600 MeV linear injector and 1.5 GeV storage ring. The layout of the storage ring is based on a novel Double Bend Achromat (DBA) magnets designed in MAX-IV Laboratory in Sweden. During the commissioning phase of the Solaris storage ring the performance of this innovative concept has been succesfully verified and obtained parameters allowed to start the commissioning of the first beamline. The beam diagnostics and instrumentation system is beased mostly on 36 quarter-wave button BPMs spreaded along the ring what allowed to measure and monitor several beam parameters like closed orbit, tune, chromaticity, disperssion, orbit response durin the commissioning and operation phases. The results of the the latest machine optimization including the orbit correction, linear optics measurements and beam-based alignment will be presented.
Refurbishment of the screen diagnostic system at ANKA30mSeminar Room 1
The screen diagnostic presently is based on analog cameras and direct displaying the image on TV screen using a video switch. It is planned to replace this system by a system based on digital Cameras and central image processing. The concept and the given constrains will be discussed.
Performance studies of CCD cameras based on signal-to-noise and photon transfer measurements30mSeminar Room 1
Taking advantage of the rapid development and the huge market for commercial available optical sensors, in the past years optical measuring techniques took on greater significance. Nowadays, area scan CCD or CMOS sensors are widely used for beam profile diagnostics. They provide the full two-dimensional information about the particle beam distribution, allowing in principle to investigate shot-to-shot profile fluctuations at moderate repetition rates. In order to study the performance and to characterize these cameras, photon transfer is a widely applied popular and valuable testing methodology. In this contribution, performance studies based on signal-to-noise and photon transfer measurements are presented for CCD cameras which are in use for beam profile diagnostics at different DESY accelerators.