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Valved Effusion Cell (V-LTC) |
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Effusion Cells
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Product description:
The valved effusion cell is a low
temperature cell with a valve at the orifice to control the beam flux.
This modification is specially useful for elements like As, P, S, Se
and Te. The integrated valve mechanism allows a change in beam flux of
two to three orders of magnitude.
Applications:
| Material |
Symbol
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Crucible
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Melting Point (°C)
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Temperature (°C) for
Vapor Pressure (Torr)
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| |
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| Arsenic |
As
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PBN |
817
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104
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150
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210
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| Phosphorus |
P
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PBN, Al2O3,
Ta, Mo
|
44 |
54
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88
|
192
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| Sulfur |
S
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PBN |
115 |
-10
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17
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55
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Technical data:
Standard:
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Type
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V - LTC
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Heating system
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Radiation heating, tantalum wires with PBN insulators
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Temperature range
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100°C - 800°C bulk zone 100°C - 1000°C valve
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Temperature stability
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≤ 0.1K depending on the PID controller
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Max. outgas temp
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800°C bulk zone
100°C valve
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Max. power
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360 W bulk zone
120 W valve
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Max. current
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12 A bulk zone
6 A valve
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Integral valve
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manual
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Bakeout temperature
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250°C
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Conditioning
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Heated to maximum temperature with and without crucible
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Shipping
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Nitrogen flooded stainless steel container with valve
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Custom:
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Flange size
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CF 40 / CF 63 or specified
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Max outer diameter
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38 mm as specified
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Length
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As specified
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Thermocouple type
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Two independent thermocouples
type C / WRe 5% - 26%
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Crucible material
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Ta / quartz
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Crucible capacity
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5 - 80 ccm, or upon request
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Options:
Motorized version
Water cooling
Other dimensions
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