Status of the design for the TESLA linear collider

Brinkmann, R.

doi:10.1109/pac.1995.504753

Cited by 13 publications

(13 citation statements)

References 3 publications

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“…It seems that the most probable future scenario for the energy upgrade of the TESLA collider, above 500 GeV, is the operation at higher accelerating gradient or/and making the collider longer [6]. This brought us to an alternative version of the superstructure [7], based on the TTF shape with modified end cells and reduced N from 9 to 7.…”

Section: Comparison Of Two Superstructures and The Ttf Cavitymentioning

confidence: 99%

Superconducting superstructure for the TESLA collider: A concept

Sekutowicz

Ferrario

Tang

1999

Phys. Rev. ST Accel. Beams

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We discuss a new layout of a cavity chain (called superstructure) allowing, we hope, a significant cost reduction due to a simplification of the rf system of the TESLA linear collider. The proposed scheme increases the fill factor and thus makes an effective gradient of the accelerator higher. In this paper computations and preliminary measurements on existing copper models of the TESLA Test Facility accelerating structures are presented. A new copper model of the scheme has been ordered, made of four 7-cell standing wave cavities, which according to the results of computations and measurements seems to be the most promising version. Experiments with a beam will be necessary to prove that the proposed layout can be used for the acceleration. [S1098-4402(99) PACS numbers: 84.90.+a, 41.75.Ht

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Section: Comparison Of Two Superstructures and The Ttf Cavitymentioning

confidence: 99%

Superconducting superstructure for the TESLA collider: A concept

Sekutowicz

Ferrario

Tang

1999

Phys. Rev. ST Accel. Beams

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“…Due to the development of the TESLA technology [1], superconducting cavities have increasingly high cavity gradients. In addition to the quality factor Q, an important criterion for good performance is a low rate of field emission.…”

Section: Introductionmentioning

confidence: 99%

“…The linear accelerator technology, based on superconducting L-band (1.3 GHz) cavities, is currently under study at DESY [1]. The XFEL will be equipped with a total of 116 superconducting acceleration modules, each containing eight '9-cell cavities' using high purity niobium material.…”

Section: Introductionmentioning

confidence: 99%

A new measurement tool for characterization of superconducting rf accelerator cavities using high-performance LTS SQUIDs

Vodel

Neubert

Nietzsche

et al. 2007

Supercond. Sci. Technol.

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This paper presents a new system to measure very low currents in an accelerator environment, using a cryogenic current comparator (CCC). In principle a CCC is a conventional current transformer using the high-performance SQUID technology to sense the magnetic fields caused by the beam current. Since the system is sensitive on a pA level, it is an optimum device to detect dark currents of superconducting cavities. The system presented here is designed for the test facilities of the superconducting accelerator modules for the European XFEL at the Deutsches Elektronen-Synchrotron (DESY) in Hamburg. Measurements in a quiet environment showed that an intrinsic noise level of the CCC of 40 pA Hz −1/2 could be achieved.

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“…UE to the development of the TESLA technology [1] superconducting cavities have increasingly high cavity gradients. In addition to the quality factor Q, an important criterion for good performance is a low rate of field emission.…”

Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

An LTS-SQUID Based Measurement Tool for Characterization of Superconductive RF Cavities

Vodel¹,

Neubert²,

Nietzsche³

et al. 2007

IEEE Trans. Appl. Supercond.

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The linear accelerator technology, based on superconducting L-band (1.3 GHz) cavities, is currently under study at DESY [1]. The XFEL will be equipped with a total of 116 superconducting acceleration modules each containing 8 "nine cell cavities". A gradient of 23.4 MV/m is required for a socalled superstructure arrangement of couples of 9-cell cavities. Higher gradients up to the physical limit at 50 MV/m are desired. The dark current, due to emission of electrons in these high gradient fields, is an unwanted particle source. Two issues are of main concern:Abstract-This paper presents a new system to measure very low currents in an accelerator environment, using a Cryogenic Current Comparator (CCC). In principle a CCC is a conventional current transformer using the high performance SQUID technology to sense the magnetic fields caused by the beam current. Since the system is sensitive on a pA level, it is an optimum device to detect dark currents of superconducting cavities. The system presented here is designed for the test facilities of the superconducting accelerator modules for the European XFEL at the Deutsches Elektronen-Synchrotron (DESY) in Hamburg. Measurements in a quiet environment showed that an intrinsic noise level of the CCC of 40 pA/√Hz could be achieved.

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Status of the design for the TESLA linear collider

Cited by 13 publications

References 3 publications

Superconducting superstructure for the TESLA collider: A concept

Superconducting superstructure for the TESLA collider: A concept

A new measurement tool for characterization of superconducting rf accelerator cavities using high-performance LTS SQUIDs

An LTS-SQUID Based Measurement Tool for Characterization of Superconductive RF Cavities

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