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Stereo Scan 440 - DCU

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I<br />

I PARAMETER I En"ECT OPTIMUM<br />

COMMENTS<br />

CONDITIONS<br />

Mounting on to OIarging:V~-oa-.l-sea:irely attacbed u~ quick - drying adhesive<br />

soecimen stub<br />

(oreferablv conductin~)<br />

! ConductivitYaDd Charging Good rooductioo to eanh u~ cooducting paint (Dag)<br />

eroundine<br />

SensItiVIty to Spec~ distortion u~:- Low beam ~t ~ culditioos ~y IaUh in<br />

Deamdamage<br />

and/oc low tV. short frame ooorSNR<br />

~od. Focus away {rQn<br />

- of iDrerat<br />

Coating CoIxIuctivity No charging OIaIJiDg - as: local ideIISity<br />

changes; astigmatism; image<br />

distu1ioo; dark micrographs<br />

ICoatin2 IS.E.Si~ , ~ meIal co8iDa I If too thick can mask Iktai1<br />

, Carbon coaIin2 I If too thick will absorb si2Dal<br />

Carbon, aluminium coatin -~~~~~~<br />

Carbon, aluminium coating Avoid intcrfereIx:e with e~s)<br />

of interest<br />

!Coating<br />

ICOating<br />

IMecbanical<br />

~tv:_-<br />

I EIK:eDtric Position 1= : ~ I<br />

---<br />

Resolution: Cracks<br />

in coatin~<br />

'I Vibration amplitude less<br />

than reQuired resolution<br />

No transIati-oo-iJlc>tion<br />

durin9; tiltina<br />

Reduce k V. aDd beam cuneDt<br />

u~ EIx:eDIric gooiormer stage<br />

f~ best results<br />

IS~ Tilting I TOPO.P8Ph~' sigDa! I About 45° f« SEt ~. I FcxIIMI by expt.<br />

WDOIseral10 . _~_BSD ~onsample<br />

I~ Tilting I <strong>Stereo</strong> Viewing Tilt difference 5-100 u~ low BIllIes for Imp MiJbt<br />

~<br />

j Workina Distance Resolution<br />

, ~ of finalleos dama2e<br />

~ of f(K:US ~.<br />

I Limit = Loss of ~utiOll<br />

Sample - BSD Long - Best forTopog and<br />

Working~<br />

DistaIK:e<br />

Crystal Orientation<br />

SOO1t - Best for Z-ContIast<br />

Table "Specimen Parameters"<br />

<strong>Stereo</strong>scan <strong>440</strong> Operator Manual

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