Parameters for low energy operation of CESR

Rice, D.; Codner, G.; Dugan, G.; Ehrlich, R.; Greenwald, Z.; He, Yun; Henderson, S.; Li, Y.; Mejidzade, V.; Mikhailichenko, A. A.; Mistry, N. B.; Nordberg, E.; Rogers, J.; Rubin, D.; Sagan, D.; Smith, Emily M.; Temnykh, A.; Tigner, M.

doi:10.1109/pac.2001.987518

Cited by 9 publications

(4 citation statements)

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“…Let us consider in this section how converting CESR to operate at low energy [3] will effect requirements to RF regulating loops. As it is shown in [9], higher required RF voltage necessitates adding two more cavities.…”

Section: Rf Controls For Cesrcmentioning

confidence: 99%

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Superconducting RF control issues at CESR

Belomestnykh

Henderson²,

Kaplan³

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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RF controls of the superconducting cavities have to deal with an extremely heavy beam loading in CESR. A feature of the CESR RF system operation is that superconducting cavities are under-coupled at high beam currents. This means that the RF system operates very close to Robinson stability limit. Analysis of the steadystate stability of the CESR RF system and the results of measurements with beam are presented. Two more SRF cavities will be installed in CESR for short bunch operation. This will tighten tolerances to RF signal regulation errors. New control electronics is under development to meet the challenge.

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Section: Rf Controls For Cesrcmentioning

confidence: 99%

“…Analysis of the steady-state stability of the CESR RF system is presented alongside with some other aspects of the RF system controls. Also discussed are the RF control issues of the recently proposed upgrade of CESR for lowenergy operation, CESRc [3].…”

Section: Introductionmentioning

confidence: 99%

Superconducting RF control issues at CESR

Belomestnykh

Henderson²,

Kaplan³

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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“…The ¢ ¤ £ ¥ ¢ § ¦ collider CESR at Cornell University is presently undergoing an upgrade which will permit studies of charmed hadron decays with unprecedented statistical accuracy [1]. The requisite luminosity at the beam energy of 1.5-3 GeV relies on control of the emittance and on the reduction of damping time afforded by the introduction of superconducting wiggler magnets with peak fields reaching 2.1 Tesla.…”

Section: Introductionmentioning

confidence: 99%

Design considerations for the CESR-c wiggler magnets

Crittenden

Mikhailichenko

Temnykh

Proceedings of the 2003 Bipolar/BiCMOS Circuits and Technology Meeting (IEEE Cat. No.03CH37440)

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The damping-dominated beam dynamics of the CESR storage ring modified to operate in the 1.5-3 GeV energy range impose unique and stringent design specifications on the 1.3-m-long superconducting wiggler magnets which provide the necessary damping. A superferric 7-pole wiggler magnet which meets these design specifications has been designed, built and tested in situ. Studies of finite-element models and particle-tracking simulations have shown that that an 8-pole model of similar design will provide improved consistency in transfer functions when operated at peak fields which differ from the primary design value.

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“…CESR-c [1] presently operates at a beam energy of 1.9 GeVwith 5 bunches 4.2 m apart in each of 8 trains separated by 67.2 m or 71.6 m. During luminosity operation, the current is limited to about 2 mA/bunch, i.e. 160 mA total current in both beams.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Effect of Beam-Beam Interactions on CESR Optics

Crittenden

Billing²,

Rubin³

Proceedings of the 2005 Particle Accelerator Conference

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The CESR storage ring facility has begun operation in an energy region which allows high-statistics investigation of charm-quark bound states. Experience during the first two years has shown that the effects of parasitic crossings in the pretzel orbits present an important factor in injection efficiency, in the beam lifetime and in the stored current limits.We compare the results of beam dynamics and tracking calculations which quantify the effects of these parasitic crossings on optics and dynamic aperture for the injected and stored trajectories to observations of beam behavior.

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Parameters for low energy operation of CESR

Cited by 9 publications

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Superconducting RF control issues at CESR

Superconducting RF control issues at CESR

Design considerations for the CESR-c wiggler magnets

A Study of the Effect of Beam-Beam Interactions on CESR Optics

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