23 Feb 2006 1

Microscope

• bla

23 Feb 2006 2

The samples

23 Feb 2006 3

Sample 5:

Sample 4:

Sample 7:new wire

23 Feb 2006 4

Location of wires:

23 Feb 2006 5

SEM picture

23 Feb 2006 6

SEM pictureWire samples: 7 Magnification: Location:Good wire

23 Feb 2006 7

SEM pictureWire samples: 4 and 5Magnification: 40xLocation:at beginning of dark region,just below scratch

scratch Wire sample 5

23 Feb 2006 8

SEM pictureWire sample: 5Magnification: 5000xVoltage: 12 kVLocation:at beginning of dark region,just below scratch

23 Feb 2006 9

SEM pictureWire sample: 5Magnification: 5000xVoltage: 12 kVLocation:0.5 mm from beginning of dark region

23 Feb 2006 10

Magnification: x100(Picture made at the UvA)

23 Feb 2006 11

23 Feb 2006 12

Typical EDS spectrumDCSN0014.JPG 12:07

Only peaks of Au and W

W: MZ1 1.68 keV

Au: Ma 2.12, 2.20 keV

23 Feb 2006 13

Analysis of dark spot (16kV)DCSN0026.JPG 12:39

DCSN0028.JPG 12:44

23 Feb 2006 14

Difference dark/light spot1) Dark spot: more W2) Light spot: more Au1)2)

We don’t understand peak at 1.40 keVThe only element there is Se

DCSN0039.JPG 14:28

23 Feb 2006 15

Check with WDS for Silicon (Wavelength Dispersion)

DCSN0041.JPG 14:38

W

23 Feb 2006 16

Checked EDS of good wire

• 2 places wire sample 7 (new)• 1 place wire sample 6 (non-

irradiated)• 1 place wire sample 5 (far from irr) all identical EDS spectra

DCSN0046.JPG 16:16

23 Feb 2006 17

Checked EDS of wire sample 5Every 100 um systematically

1) Normal2) A bit of W3) A bit of W picture4) A bit of W5) A tiny bit of W6) More W picture7) A bit of W8) A bit of W9) A tiny bit of W10) A bit of W

DCSN0048.JPG 16:31

DCSN0051.JPG 16:55

23 Feb 2006 18

Checked for Oxygen with WDS

DCSN0054.JPG 17:07DSCN0057.JPG 17:20

23 Feb 2006 19

Check with WDS for Carbon: Yes…

PS. Also checked for Cr: not found.