Beam position monitoring system at CESR

In recent years, there has been an increasing demand for noninvasive beam size monitoring on particle accelerators. Ideally, these monitors should be cost effective and require little or no maintenance. These monitors should also be suitable for both linear and circular machines. Here, the experimental setup is described in detail, and the results from a diffraction radiation beam size monitor are presented. This monitor has been tested on the Cornell Electron Storage Ring using a 1 mA (1.6 × 10 10 particles per bunch) single bunch electron beam at 2.1 GeV energy. Images of the target surface and the angular distribution of the emitted diffraction radiation were acquired at wavelengths of 400 and 600 nm. These measurements are compared to two analytical models.

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“…This BPM is a member of the normal CESR orbit system and is triggered to acquire turn-by-turn beam orbits. The BPM resolution is 10 μm [26].…”

Section: B Dr Vacuum Chambermentioning

confidence: 99%

Feasibility of diffraction radiation for noninvasive beam diagnostics as characterized in a storage ring

Bobb

Kieffer

Lefèvre

et al. 2018

Phys. Rev. Accel. Beams

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“…This method is described in detail in these references [6,7]. After performing beam position monitor (BPM) gain corrections and centering, the procedure to reduce vertical emittance uses the CESR beam position monitor (CBPM) system [16] in a sequence of measuring and correcting 1) the closed orbit, 2) betatron phase and coupling, and 3) vertical dispersion. Using the x-ray beam size monitor (xBSM) [17], the success of this procedure is determined by measuring the vertical beam size at each step of the process [6].…”

Section: Low Emittance Tuning Measurementsmentioning

confidence: 99%

Measurement Techniques for Low Emittance Tuning and Beam Dynamics at CESR

Billing,

Dobbins,

Forster

et al. 2018

Preprint

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A: After operating as a High Energy Physics electron-positron collider, the Cornell Electron-positron Storage Ring (CESR) has been converted to become a dedicated synchrotron light source for the Cornell High Energy Synchrotron Source (CHESS). Over the course of several years CESR was adapted for accelerator physics research as a test accelerator, capable of studying topics relevant to future damping rings, colliders and light sources. Initially some specific topics were targeted for accelerator physic research with the storage ring in this mode, labeled CesrTA. These topics included 1) tuning techniques to produce low emittance beams, 2) the study of electron cloud (EC) development in a storage ring and 3) intra-beam scattering effects. The complete conversion of CESR to CesrTA occurred over a several year period, described elsewhere [1][2][3]. A number of specific instruments were developed for CesrTA. Much of the pre-existing instrumentation was modified to accommodate the scope of these studies and these are described in a companion paper [4]. To complete this research, a number of procedures were developed or modified, often requiring coordinated measurements among different instruments [5]. This paper provides an overview of types of measurements employed for the study of beam dynamics during the operation of CesrTA.

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“…Each achromat in CHESS-U will be instrumented with four CBPM-II modules, one adjacent to every quadrupole. CBPM-II specifications are listed in Table III; further details are available in [21].…”

Section: A Cesr Beam Position Monitorsmentioning

confidence: 99%

Accelerator Design for the CHESS-U Upgrade

Shanks,

Barley,

Barrett

et al. 2018

Preprint

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During the summer and fall of 2018 the Cornell High Energy Synchrotron Source (CHESS) is undergoing an upgrade to increase high-energy flux for x-ray users. The upgrade requires replacing one-sixth of the Cornell Electron Storage Ring (CESR), inverting the polarity of half of the CHESS beam lines, and switching to single-beam on-axis operation. The new sextant is comprised of six double-bend achromats (DBAs) with combined-function dipole-quadrupoles. Although the DBA design is widely utilized and well understood, the constraints for the CESR modifications make the CHESS-U lattice unique. This paper describes the design objectives, constraints, and implementation for the CESR accelerator upgrade for CHESS-U.

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Beam position monitoring system at CESR

Cited by 8 publications

References 15 publications

Feasibility of diffraction radiation for noninvasive beam diagnostics as characterized in a storage ring

Feasibility of diffraction radiation for noninvasive beam diagnostics as characterized in a storage ring

Measurement Techniques for Low Emittance Tuning and Beam Dynamics at CESR

Accelerator Design for the CHESS-U Upgrade

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