Upgrade Project of the SOLEIL Accelerator Complex

Nadji, A.; Nadolski, Laurent

doi:10.1080/08940886.2023.2186661

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…SOLEIL is a 3 rd generation light source (GLS) that has been providing photon beams to external users since 2008. An upgrade project to a 4 th GLS called SOLEIL II had passed the CDR phase and is currently in the TDR phase [1,2,3,4] . A very low emittance booster is needed to be able to inject the beam into the new storage ring, such a very low emittance booster can only be achieved by using a multi-bend achromat (MBA) lattice [5,6] with a much-reduced vacuum chamber aperture of 32x22 mm 2 compared to the current machine of averagely 50x35 mm 2 .…”

Section: Introductionmentioning

confidence: 99%

Resistive-wall instability evaluation along the ramp in the SOLEIL II booster

Foosang,

Gamelin,

Tordeux

et al. 2024

J. Phys.: Conf. Ser.

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The ultra-low emittance specification of the SOLEIL II storage ring requires a challenging lattice design of the booster that will inject the beam into it. The dimension of the vacuum chamber in the new booster must be reduced compared to that in the present machine. The resistive-wall (RW) instability is then expected to become more important than in the current booster. However, the Amplitude-Dependent Tune Shift (ADTS) is also expected to be stronger due to the strong sextupole magnets necessary for chromatic error correction in the new lattice. It could then be an important effect to fight against this instability. Therefore, evaluating this instability is important to ensure the machine’s feasibility. This work studies the beam dynamics along the ramp in the RW instability regime using the code mbtrack2. The turn-by-turn tracking allows us to see the evolution of the beam thoroughly and understand how RW, synchrotron radiation, and ADTS impact the beam stability.

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Section: Introductionmentioning

confidence: 99%

Resistive-wall instability evaluation along the ramp in the SOLEIL II booster

Foosang,

Gamelin,

Tordeux

et al. 2024

J. Phys.: Conf. Ser.

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“…As a rule of thumb, the design complexity of the BPMs increases over time, moving from one generation of light sources to the next [4][5][6], in order to meet the increasingly stringent design constraints required to satisfy the user expectations. Fourth-generation synchrotron light sources [7,8] optimized for X-ray production, compared to third-generation machines, have higher stored current, shorter bunch lengths, smaller vacuum pipe cross-sectional dimensions, and non-uniform filling patterns. All these elements require the adoption of computer-aided engineering tools for BPM design.…”

Section: Introductionmentioning

confidence: 99%

Button-Type Beam Position Monitor Development for Fourth-Generation Synchrotron Light Sources: Numerical Modeling and Test Bench Measurements

Cleva,

Bassanese,

Comisso

et al. 2024

Sensors

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This paper addresses the design of beam position monitor (BPM) devices suitable for fourth-generation diffraction-limited X-ray storage rings. Detailed investigations of the electromagnetic (EM) phenomena occurring inside the component under various working conditions are carried out by considering different BPM EM models defined by their geometry and materials. Moving from a theoretical characterization of the common round geometry, rhomboidal structures are studied through a careful numerical analysis relying on advanced computer-aided tools. Several critical elements, such as wakefields, pick-up signal extraction, and trapped and propagating modes, are explored from the simulation point of view and from the experimental one, by deploying a manufactured microwave test bench, which is employed to measure the radio frequency behavior of a BPM prototype built at Elettra Sincrotrone Trieste. The aim of the proposed study is to identify a satisfactory tradeoff between achievable performance and practical realizability for BPM devices operating in last-generation light sources.

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