1. Oxygen content analysis
EN Division-Metallurgy and Metrology
Domaine / Field:
CLIC
Date:
18/05/2015
N° EDMS / EDMS Nr.:
Requérant / Customer:
N. Catalan BE-RF
Liste de distribution / Distribution list:
CLIC-PROD
Oxygen content analysis
Données expérimentales / Experimental data:
Sample: Oxygen content analysis of 4 different samples. Sulphur content analysis in one sample (sample nr 4).
The experimental analysis was carried out by Evans Analytical Group SAS (EAG, France) at their facilities in
94, chemin de la Peyrette
31170 Tournefeuille - FRANCE
Equipment :
LECO TC436 model for the oxygen content analysis
EMIA820V for the sulphur content analysis.
Redaction / Written by:
E. RODRIGUEZ CASTRO – BE/RF-LRF
Approuvé par / Accepted by:
F. LEAUX - EN/MME-MM
Expériences / Testing by:
Superviseur / Supervisor:
EN Division-Materials and Metrology
CERN/EN/MME-MM/EDMS

2. Background
Previous studies EDMS nr show some features that only appear in 12 mm discs surface (sample 2, as presented in slide nr.2).
One hypothesis about the appearance of these features is a hydrogen illness phenomenon which would occur during heat treatment in H2 atmosphere if oxygen content is higher than 5 ppm as requested in “Technical Specification N° 2001 – Ed. 7 – ” (EDMS ).
Moreover, it was discovered that the various batches of Cu-OFE did not come from the same supplier.
Four samples were sent to Evans Analytical Group (EAG) for oxygen content analysis.
In addition one of the samples (sample 4) was requested also for the sulphur content.

3. S150 Ø 48mm for analysis of oxygen and sulphur
Samples
S150 Ø 48mm for analysis of oxygen and sulphur
Waveguide
From Ø 85mm
bar nr 98
Ø 12mm
Sample 1
Sample 2
Sample 3
Sample 4

8. Conclusions Sample 1, 2 and 4 are below 5ppm of oxygen.
Sample 2 have less than 5 ppm of oxygen  observed features have no relation with oxygen content.
Sample 3 is 22 ppm of oxygen what is more than 4 time the upper limit.
In sample 4 the S content was also measured being within tolerance.