CESR performance and upgrade status

Peck, S.; Rubin, D.

doi:10.1109/pac.1999.795685

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…CESR has been described in detail elsewhere. [4] All the data used in this measurement are taken at an e + e − collision energy of 10.58 GeV, and with bunch currents in the range of 2.5 to 7.0 mA over a four month period in late 1998 and early 1999. The CLEO detector has also been described in detail elsewhere.…”

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confidence: 99%

Novel method of measuring electron positron colliding beam parameters

Cinabro

Korbiak

Ehrlich

et al. 2002

Nuclear Instruments and Methods in Physics Research Section A:

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Through the simultaneous measurement of the transverse size as a function of longitudinal position, and the longitudinal distribution of luminosity, we are able to measure the β * y (vertical envelope function at the collision point), vertical emittance, and bunch length of colliding beams at the Cornell Electron-positron Storage Ring (CESR). This measurement is possible due to the significant "hourglass" effect at CESR and the excellent tracking resolution of the CLEO detector.

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confidence: 99%

Novel method of measuring electron positron colliding beam parameters

Cinabro

Korbiak

Ehrlich

et al. 2002

Nuclear Instruments and Methods in Physics Research Section A:

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“…This can be attributed in part to improved alignment of magnetic elements [32]. More details about CESR performance and upgrade status can be found in [33]. Table 3 lists highest parameters achieved by CESR II.…”

Section: Cesr Performance and Limitationsmentioning

confidence: 99%

The high luminosity performance of CESR with the new generation superconducting cavity

Belomestnykh

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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With the installation of the first SRF cavity in September of 1997, the upgrade of the CESR RF system has begun [1]. This cavity belongs to the new generation of socalled HOM damped cavities designed for high current storage rings [2]. The upgrade is proceeding by replacing one by one old copper cavities with superconducting ones during short machine shutdowns.CESR continues to demonstrate spectacular performance. It operates with 36 bunches in 9 trains of 4 bunches in each beam with total beam current up to 550 mA at the start of fills for high energy physics. In the course of last year both peak luminosity and integrated luminosity per day increased by 67% and are equal now to 8. /day. The latter number corresponds roughly to 43 thousands of B mesons per day. The first superconducting cavity has been in operation in CESR since October of 1997. The cavity operates at accelerating gradients up to 7 MV/m and delivers to the beam maximum RF power of 220 kW through the ceramic window, the record value for superconducting cavities. We found that pulsed power processing without beam is extremely helpful in improving RF window performance. The maximum HOM power extracted from the beam by one cavity is 5.7 kW.Four single-cell HOM damped cavities will eventually support a total beam current of 1 A. Because of the very low impedance of superconducting cavity module, we calculate the longitudinal instability threshold from cavity HOMs to be in excess of 1 A. The second cavity was installed in CESR during October'98 shutdown. The third cavity is already installed in CESR, and its commissioning will start immediately after this conference. The fourth cryomodule is being assembled and is schedule for installation in summer of 1999.

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Insertion and crossing region design

Wienands¹,

Beloshitsky²

2001

AIP Conference Proceedings

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CESR performance and upgrade status

Cited by 4 publications

References 4 publications

Novel method of measuring electron positron colliding beam parameters

Novel method of measuring electron positron colliding beam parameters

The high luminosity performance of CESR with the new generation superconducting cavity

Insertion and crossing region design

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