1. CERN/EN/MME-MM/EDMS draft
EN Division-Metallurgy and Metrology
Domaine / Field:
CLIC
Date:
22/09/2015
N° EDMS / EDMS Nr.:
draft
Requérant / Customer:
Walter Wuensch
Liste de distribution / Distribution list:
RF development mmeting
DC electrodes comparison
Soft Cu Vs Hard Cu
Données expérimentales / Experimental data:
Sample: 4 electrodes from the DC system. Two of them overpass the Heat Treatment and thus are in a hard Cu state. The other two are in their more standard, for this kind of samples, soft Cu state.
Equipment :
Optical Microscope Zeiss Axio-Imager, with ZenCore2 and Axio-Visio software.
50 mm2 X Max Energy-dispersive X-ray spectroscopy (EDS) detector (Oxford), INCA software.
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 draft

2. Introduction: Individual observation reports are available:
For soft Cu (EDMS v.1)
For hard Cu (EDMS v.1)

3. Soft Cu electrodes
Anode n16
Cathode n14
Cathode image is mirroed

4. Hard Cu electrodes Anode hard Cu Cathode hard Cu
Cathode image is mirroed

5. Summary of observations
In Soft Cu electrodes the BD craters are spread all over the surfaces
In Hard Cu electrodes the BD craters are clustered in several positions