Parameter
Value
Crossbeam (gas tight), with an axial connector
Bore in glass ceramic for tube with outer diameter
3 mm
Bakeout temperature
Without cables and connector plates
≤400°C
With electron collimation magnet
≤300°C
With cables and connector plates
≤180°C
With pre-amplifier or electrometer
≤50°C
Materials in vacuum
Stainless steel, Mo, Al
2
O
3
, CuBe, Ni, W, yttriated iridium
Filament life
11)
Tungsten
>10000 h
Yttriated iridium
>10000 h
Weight
QMA 400 (Faraday)
2.9 kg
QMA 400 (90° SEM)
10.7 kg
QMA 410 (Faraday)
6.5 kg
QMA 410 (90° SEM)
17.2 kg
QMA 430 (90° SEM)
10.7 kg
Tbl. 7:
Technical data
12.2 Dimensions
90° off-axis SEM
Faraday
A
B
C
D
E
F
E
133
G
133
A
B
C
E
G
Fig. 23:
Dimensions
Dimensions in mm.
11) Valid for p < 10
-5
hPa, emission 1 mA and electron energy ≥70 eV in a non-oxidizing atmosphere
Technical data and dimensions
49/52
