Stripline-type beam-position-monitor system for single-bunch electron/positron beams

Suwada, T.; Kamikubota, N.; Fukuma, H.; Akasaka, N.; Kobayashi, Hitoshi

doi:10.1016/s0168-9002(99)00960-2

Cited by 19 publications

(10 citation statements)

References 4 publications

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“…The standard instruments on RFAs (in particular LINACs) are striplines (Suwada et al, 2000) and cavity BPMs (Hartman et al, (1995); Keil et al, 2010;Keil et al, 2013). Non-destructive, easily included into a feed-back system, they provide with a resolution which can reach the sub-micron level.…”

Section: Position Measurement Techniquesmentioning

confidence: 99%

Electron and photon diagnostics for plasma acceleration-based FELs

Labat

Ajjouri

Hubert

et al. 2018

J Synchrotron Radiat

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It is now well established that laser plasma acceleration (LPA) is an innovative and good candidate in the beam acceleration field. Relativistic beams are indeed produced up to several GeV but their quality remains to be demonstrated in the highly demanding case of Free Electron Lasers (FELs). Several experiments already showed the feasibility of synchrotron radiation delivery based on a LPA but free electron lasing has still to be achieved. Since the quality of the LPA beam inside the undulator is the critical issue, any LPA based FEL experiment requires a refined characterization of the beam properties along the transport line and of the photon beam at the undulator exit. This characterization relies on diagnostics which must be adapted to the LPA specificities. We will review the electron and photon diagnostics already used on LPAs and required for LPA based FELs, and illustrate the critical points using recent experiments performed around the world.

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Section: Position Measurement Techniquesmentioning

confidence: 99%

Electron and photon diagnostics for plasma acceleration-based FELs

Labat

Ajjouri

Hubert

et al. 2018

J Synchrotron Radiat

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“…This method assumes no a priori knowledge of the model of beam transport between the three BPMs [32,33]. For the same data set presented in Fig.…”

Section: B Position Resolutionmentioning

confidence: 99%

Design and performance of a high resolution, low latency stripline beam position monitor system

Apsimon

Bett

Kraljevic

et al. 2015

Phys. Rev. ST Accel. Beams

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A high-resolution, low-latency beam position monitor (BPM) system has been developed for use in particle accelerators and beam lines that operate with trains of particle bunches with bunch separations as low as several tens of nanoseconds, such as future linear electron-positron colliders and free-electron lasers. The system was tested with electron beams in the extraction line of the Accelerator Test Facility at the High Energy Accelerator Research Organization (KEK) in Japan. It consists of three stripline BPMs instrumented with analogue signal-processing electronics and a custom digitizer for logging the data. The design of the analogue processor units is presented in detail, along with measurements of the system performance. The processor latency is 15.6 AE 0.1 ns. A single-pass beam position resolution of 291 AE 10 nm has been achieved, using a beam with a bunch charge of approximately 1 nC.

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“…The mechanical precision for the assembly of the electrodes was controlled within ±0.1 mm. Single-pass measurements of BPM signals utilizing a waveform digitizer or a digital oscilloscope have been used in the electron accelerators of KEK [2,3]. Fig.…”

Section: Operation Statusmentioning

confidence: 99%

Beam-transport system of KEKB

Kikuchi

Honda

Iida

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

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The transport lines of the KEKB for positrons and electrons convey the beams separately from the injector linac to the KEKB rings. The length is about 500 m for each line. In order to make the maximum use of the existing tunnels and also to avoid interference with the AR, the beam lines took a serpentine course, resulting in a rather large curvature in the arcs. The consequences were a large number of bends in the arcs with high fields and also a large dispersion function and, thus, a large R 56 component. The latter issue is crucial for the KEKB rings, since it results in a longer bunch length at injection. We adopted a special optics that reduces the R 56 coefficient sufficiently. We have developed novel water-cooled ceramic chambers for kickers, eddy-current type septum magnets for injection, and a beam-abort system for the rings. The present paper describes the design and current status of the beam lines, the injection system, and the beam-abort system.

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Stripline-type beam-position-monitor system for single-bunch electron/positron beams

Cited by 19 publications

References 4 publications

Electron and photon diagnostics for plasma acceleration-based FELs

Electron and photon diagnostics for plasma acceleration-based FELs

Design and performance of a high resolution, low latency stripline beam position monitor system

Beam-transport system of KEKB

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