Long-term test of a LEP prototype superconducting cavity in the CERN SPS

Boussard, D.; Cavallari, G.; Kindermann, H. P.; Passardi, G.; Stierlin, R.; Tückmantel, Joachim; Weingarten, W.

doi:10.1109/pac.1989.72923

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…The spectrum analyzer (standard swept-type model HP 8595E) is sensitive to the Schottky noise current, which is proportional to the square root of the number N of the particles in the beam. To get the Schottky power spectra, which represent the momentum distribution [25], the amplitudes of the measured distribution were squared. The spectrum analyzer was operated in the range of the thousandth harmonic but, because of the different flat top revolution frequencies, harmonics from 997 to 1004 were also measured.…”

Section: Determination Of the Revolution Frequency F0mentioning

confidence: 99%

High precision beam momentum determination in a synchrotron using a spin resonance method

Goslawski

Khoukaz

Gebel

et al. 2010

EPJ Web of Conferences

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Abstract. In order to measure the mass of the η meson with high accuracy using the d p → 3 He η reaction, the momentum of the circulating deuteron beam in the Cooler Synchrotron COSY of the Forschungszentrum Jülich has to be determined with unprecedented precision. This has been achieved by studying the spin dynamics of the polarized deuteron beam. By depolarizing the beam through the use of an artificially induced spin resonance, it was possible to evaluate its momentum p with a precision of ∆p/p < 10 −4 for a momentum of roughly 3 GeV/c.

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Section: Determination Of the Revolution Frequency F0mentioning

confidence: 99%

High precision beam momentum determination in a synchrotron using a spin resonance method

Goslawski

Khoukaz

Gebel

et al. 2010

EPJ Web of Conferences

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“…In this case, coupling between mechanical and stored electromagnetic energy occurs and the cavities start to oscillate at their mechanical resonant frequency around 100 Hz. 8 This effect is proportional to the square of the accelerating field. It occurs in operation when with higher beam current the tuning system detunes the cavities to compensate for the beam loading.…”

Section: Microphonicsmentioning

confidence: 99%

Experience with the Lep Superconducting RF Accelerating System

Geschonke

1998

Advances in Cryogenic Engineering

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CERN is presently upgrading the large Electron Positron Collider (LEP) to higher energy by installing superconducting RF accelerating cavities. For a total installed circumferential voltage of about 2800 MV, 272 cavities operating at 352 MHz will be needed, representing an active length of 462 m and a cold surface of more than 1600 m 2 . The series production cavities are made out of copper, sputter-coated with a thin layer of niobium and cooled with liquid He to 4.5 K. The cavities are produced by industry and the acceptance testing is done at CERN. In 1996 176 cavities had been installed and run successfully at their design gradient of 6 MV/m during physics at a beam energy of 86 GeV. As RF power sources 36 klystrons will finally be installed with a nominal RF output power of 1 MW each. In this paper the superconducting accelerating system in LEP will be described and experience gained during operation for physics as well as new developments will be presented.

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The performance of the SPS as LEP injector

Cornelis

Schmidt

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology

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Long-term test of a LEP prototype superconducting cavity in the CERN SPS

Cited by 4 publications

References 1 publication

High precision beam momentum determination in a synchrotron using a spin resonance method

High precision beam momentum determination in a synchrotron using a spin resonance method

Experience with the Lep Superconducting RF Accelerating System

The performance of the SPS as LEP injector

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