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Title: Ingot Nb based SRF technology for the International Linear Collider

The International Linear Collider (ILC) is anticipated to be built as the next energy-frontier electron-positron colliding accelerator with a global effort in particle physics. Niobium based Superconducting Radio-Frequency (SRF) technology is required to provide beam-accelerating structure with elliptical cavity strings to linearly accelerate the electron and positron beams up to 250 GeV and to realize a center-of-mass energy of 500 GeV in collisions. The accelerator design and R&D efforts progressed, and the ILC Technical Design Report (ILC-TDR) was published in 2013. Niobium will take a critical role to generate electric field gradient with a frequency of 1.3 GHz, for accelerating the beam with the best efficiency, in energy balance, using RF superconductivity. This paper discusses a technical approach to provide Nb material (ingot) and thin disks for producing the elliptical cavity structure, with direct slicing from Nb ingot having sufficiently optimized purity and residual resistance ration (RRR) necessary for the ILC SRF cavities.
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, 305-0801 (Japan)
  2. (CERN) 23 Genève, CH-1211 (Switzerland)
  3. Jefferson Lab (JLab) Newport News, VA, 23606 (United States)
Publication Date:
OSTI Identifier:
22492693
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1687; Journal Issue: 1; Conference: Ingot niobium summary workshop, Newport News, VA (United States), 4 Dec 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DESIGN; ELECTRIC FIELDS; ELECTRON BEAMS; ELECTRON-POSITRON COLLISIONS; ENERGY BALANCE; GEV RANGE 100-1000; GHZ RANGE 01-100; IMPURITIES; INTERNATIONAL LINEAR COLLIDER; NIOBIUM; POSITRON BEAMS; RADIOWAVE RADIATION; RF SYSTEMS; SUPERCONDUCTING CAVITY RESONATORS; SUPERCONDUCTIVITY