Title: Electrochemical system and method for electropolishing superconductive radio frequency cavities

Abstract

An electrochemical finishing system for super conducting radio frequency (SCRF) cavities including a low viscosity electrolyte solution that is free of hydrofluoric acid, an electrode in contact with the electrolyte solution, the SCRF cavity being spaced apart from the electrode and in contact with the electrolyte solution and a power source including a first electrical lead electrically coupled to the electrode and a second electrical lead electrically coupled to the cavity, the power source being configured to pass an electric current between the electrode and the workpiece, wherein the electric current includes anodic pulses and cathodic pulses, and wherein the cathodic pulses are interposed between at least some of the anodic pulses. The SCRF cavity may be vertically oriented during the finishing process.

Inventors:

Taylor, E. Jennings; Inman, Maria E.; Hall, Timothy

Issue Date:

Tue Apr 14 00:00:00 EDT 2015

Research Org.:

Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1351797

Patent Number(s):

9006147

Application Number:

13/546,072

Assignee:

Faraday Technology, Inc. (Clayton, OH)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23H - WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25F - PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS

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B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23H - WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL

B23H3/00 - Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25F - PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS

C25F3/26 - of refractory metals

H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE

H05H7/20 - with superconductive walls

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Resource Type:

Patent

Resource Relation:

Patent File Date: 2012 Jul 11

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY