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Title: High performance SRF accelerator structure and method

Abstract

A high performance accelerator structure and method of production. The method includes precision machining the inner surfaces of a pair of half-cells that are maintained in an inert atmosphere and at a temperature of 100 K or less. The method includes removing thin layers of the inner surfaces of the half-cells after which the roughness of the inner surfaces in measured with a profilimeter. Additional thin layers are removed until the inner surfaces of the half-cell measure less than 2 nm root mean square (RMS) roughness over a 1 mm2 area on the profilimeter. The two half-cells are welded together in an inert atmosphere to form an SRF cavity. The resultant SRF cavity includes a high accelerating gradient (Eacc) and a high quality factor (Q0).

Inventors:
Issue Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600314
Patent Number(s):
10,485,090
Application Number:
15/411,986
Assignee:
Jefferson Science Associates, LLC (Newport News, VA)
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Patent
Resource Relation:
Patent File Date: 01/21/2017
Country of Publication:
United States
Language:
English

Citation Formats

Myneni, Ganapati Rao. High performance SRF accelerator structure and method. United States: N. p., 2019. Web.
Myneni, Ganapati Rao. High performance SRF accelerator structure and method. United States.
Myneni, Ganapati Rao. Tue . "High performance SRF accelerator structure and method". United States. https://www.osti.gov/servlets/purl/1600314.
@article{osti_1600314,
title = {High performance SRF accelerator structure and method},
author = {Myneni, Ganapati Rao},
abstractNote = {A high performance accelerator structure and method of production. The method includes precision machining the inner surfaces of a pair of half-cells that are maintained in an inert atmosphere and at a temperature of 100 K or less. The method includes removing thin layers of the inner surfaces of the half-cells after which the roughness of the inner surfaces in measured with a profilimeter. Additional thin layers are removed until the inner surfaces of the half-cell measure less than 2 nm root mean square (RMS) roughness over a 1 mm2 area on the profilimeter. The two half-cells are welded together in an inert atmosphere to form an SRF cavity. The resultant SRF cavity includes a high accelerating gradient (Eacc) and a high quality factor (Q0).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}

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Works referenced in this record:

Method of fabricating a superconducting cavity
patent, August 1988


Electrochemical system and method for electropolishing superconductive radio frequency cavities
patent, April 2015


Superconducting accelerator cavity with a heat affected zone having a higher RRR
patent, August 2000


Large grain cavities from pure niobium ingot
patent, March 2012


RF cavity fabrication method including adherence of superconductor-coated tiles
patent, May 2014


Method for producing smooth inner surfaces
patent, May 2016