dorsal/arxiv
View SchemaThe Superconducting TESLA Cavities
| Authors | B. Aune |
|---|---|
| Categories | |
| ArXiv ID | physics/0003011 |
| URL | https://arxiv.org/abs/physics/0003011 |
| DOI | 10.1103/PhysRevSTAB.3.092001 |
| Journal | Phys.Rev.ST Accel.Beams 3 (2000) 092001 |
Abstract
The conceptional design of the proposed linear electron-positron collider TESLA is based on 9-cell 1.3 GHz superconducting niobium cavities with an accelerating gradient of Eacc >= 25 MV/m at a quality factor Q0 > 5E+9. The design goal for the cavities of the TESLA Test Facility (TTF) linac was set to the more moderate value of Eacc >= 15 MV/m. In a first series of 27 industrially produced TTF cavities the average gradient at Q0 = 5E+9 was measured to be 20.1 +- 6.2 MV/m, excluding a few cavities suffering from serious fabrication or material defects. In the second production of 24 TTF cavities additional quality control measures were introduced, in particular an eddy-current scan to eliminate niobium sheets with foreign material inclusions and stringent prescriptions for carrying out the electron-beam welds. The average gradient of these cavities at Q0 = 5E+9 amounts to 25.0 +- 3.2 MV/m with the exception of one cavity suffering from a weld defect. Hence only a moderate improvement in production and preparation techniques will be needed to meet the ambitious TESLA goal with an adequate safety margin. In this paper we present a detailed description of the design, fabrication and preparation of the TESLA Test Facility cavities and their associated components and report on cavity performance in test cryostats and with electron beam in the TTF linac. The ongoing R&D towards higher gradients is briefly addressed.
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"abstract": "The conceptional design of the proposed linear electron-positron collider\nTESLA is based on 9-cell 1.3 GHz superconducting niobium cavities with an\naccelerating gradient of Eacc \u003e= 25 MV/m at a quality factor Q0 \u003e 5E+9. The\ndesign goal for the cavities of the TESLA Test Facility (TTF) linac was set to\nthe more moderate value of Eacc \u003e= 15 MV/m. In a first series of 27\nindustrially produced TTF cavities the average gradient at Q0 = 5E+9 was\nmeasured to be 20.1 +- 6.2 MV/m, excluding a few cavities suffering from\nserious fabrication or material defects. In the second production of 24 TTF\ncavities additional quality control measures were introduced, in particular an\neddy-current scan to eliminate niobium sheets with foreign material inclusions\nand stringent prescriptions for carrying out the electron-beam welds. The\naverage gradient of these cavities at Q0 = 5E+9 amounts to 25.0 +- 3.2 MV/m\nwith the exception of one cavity suffering from a weld defect. Hence only a\nmoderate improvement in production and preparation techniques will be needed to\nmeet the ambitious TESLA goal with an adequate safety margin. In this paper we\npresent a detailed description of the design, fabrication and preparation of\nthe TESLA Test Facility cavities and their associated components and report on\ncavity performance in test cryostats and with electron beam in the TTF linac.\nThe ongoing R\u0026D towards higher gradients is briefly addressed.",
"arxiv_id": "physics/0003011",
"authors": [
"B. Aune"
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"doi": "10.1103/PhysRevSTAB.3.092001",
"journal_ref": "Phys.Rev.ST Accel.Beams 3 (2000) 092001",
"title": "The Superconducting TESLA Cavities",
"url": "https://arxiv.org/abs/physics/0003011"
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