IEC 61788-23:2021 PDF
Superconductivity - Part 23: Residual resistance ratio measurement - Residual resistance ratio of cavity-grade Nb superconductors
Superconductivity - Part 23: Residual resistance ratio measurement - Residual resistance ratio of cavity-grade Nb superconductors
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 86
- Дата публикации:
- 23 августа 2021 г.
- Издание:
- IEC IS 61788 edition 2 version 1
- ICS:
- 17.220
IEC 61788-23:2021 addresses a test method for the determination of the residual resistance ratio (RRR), rRRR, of cavity-grade niobium. This method is intended for high-purity niobium grades with 150 < rRRR < 600. The test method is valid for specimens with rectangular or round cross-section, cross-sectional area greater than 1 mm2 but less than 20 mm2, and a length not less than 10 nor more than 25 times the width or diameter.
Abstract
Overview
IEC 61788-23:2021 - Superconductivity Part 23 - defines a standardized test method to determine the residual resistance ratio (rRRR) of cavity-grade niobium. The standard is targeted at high‑purity niobium used for superconducting radio‑frequency (SRF) cavities and similar applications. It prescribes measuring electrical resistance as a specimen is warmed through the superconducting transition (no applied magnetic field) to determine the low‑temperature residual resistance and compute rRRR (ratio of resistance at room temperature to residual resistance).
Key technical topics and requirements
- Material range: Designed for cavity‑grade niobium with 150 < rRRR < 600.
- Specimen geometry: Valid for rectangular or round cross‑section specimens with **cross‑sectional area > 1 mm² and
Технические детали
- Технический комитет
- TC 90 - Superconductivity
- SKU
- IEC 61788-23:2021
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