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Title: ATW ETA=0.175 2-GAP SPOKE CAVITY TRANSIT-TIME FACTOR, AGAIN

Abstract

No abstract prepared.

Authors:
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
783363
Report Number(s):
LA-UR-01-3736
TRN: US0302036
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jun 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ETA MESONS; ACCELERATOR DRIVEN TRANSMUTATION; RADIOACTIVE WASTES; TIME DEPENDENCE; CAVITY RESONATORS

Citation Formats

R. W. GARNETT. ATW ETA=0.175 2-GAP SPOKE CAVITY TRANSIT-TIME FACTOR, AGAIN. United States: N. p., 2001. Web.
R. W. GARNETT. ATW ETA=0.175 2-GAP SPOKE CAVITY TRANSIT-TIME FACTOR, AGAIN. United States.
R. W. GARNETT. Fri . "ATW ETA=0.175 2-GAP SPOKE CAVITY TRANSIT-TIME FACTOR, AGAIN". United States. doi:. https://www.osti.gov/servlets/purl/783363.
@article{osti_783363,
title = {ATW ETA=0.175 2-GAP SPOKE CAVITY TRANSIT-TIME FACTOR, AGAIN},
author = {R. W. GARNETT},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2001},
month = {Fri Jun 01 00:00:00 EDT 2001}
}

Conference:
Other availability
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  • No abstract prepared.
  • Two 350-MHz ╬▓ = 0.175 two-gap superconducting (SC) spoke resonator cavities have been fabricated in industry under an R&D project for the Advanced Accelerator Applications (AAA) program at LANL. This paper describes the structure, presents the test results of mechanical properties, tuning sensitivity at room temperature, and Q- E curves at 4 K. A maximum accelerating field of 11.6 MV/m has been obtained, which exceeds our present goal of 7.5 MV/m with ample margin
  • In this paper, we present the electromagnetic and structural design of a low-b superconducling spoke resonator for a beam-test in the Low Energy Demonstration Accelerator (LEDA). This test is part of the Advanced Accelerator Applications (AAA) project. Recently, the sole use of superconducting resonators from 6.7 MeV on has been approved for this project. The beam test will use the lowest- resonator from this accelerator design. The choices of the cavity dimensions are driven by its use imrnediately after the LEDA Radio-Frequency Quadrupole (RFQ). The frequency is 350 MHz, the lengt corresponds to a geometric p (Ps) of 0.175. Ourmore » design approach has been to carry out an integrated RF and mechanical design from the start. The final cavity is well understood in terms of IW: and mechanical properties. The RF properties, like Q, WQ, peak surface fields and acceleration efficiency are very reasonable for such a low- structure. 'The design also includes power coupler, vacuum and pick-up ports and lheir influences. The mechanical design added tuning sensitivities, tuning forces, stiffening schemes and the understanding of stresses under various load conditions. This presentation reflects changes in the coupling port and the beam aperture compared to a previously presented design.« less
  • Two {beta} = 0.175, 350 MHz, 2-gap superconducting (SC) spoke cavities were fabricated in industry under the Advanced Accelerator Applications (AAA) project for the transmutation of nuclear waste. These cavities are promising candidates for the accelerating structures between a RFQ and the elliptical SC cavities for proton and heavy ion linacs. Since their delivery in July 2002, they have been tested in terms of mechanical properties, low-temperature performance, i.e., Qo-Eaccc urves at 4 K and 2 K, surface resistance dependence on temperature and for multipacting (MP). The two cavities achieved accelerating fields of 13.5 MV/m and 13.0 MV/m as comparedmore » to the required field of 7.5 MV/m with enough margin for the quality factor. These cavities seem to need more time to condition away MP than elliptical cavities, but MP does not occur once the cavity is conditioned and kept at 4 K. The length of the 103 mm-diameter nominal coupler port was found to be too short for the penetrating field.« less