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Low Temperature Effusion Cell (LTC) |
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Effusion Cells
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Product description:
The low temperature effusion cell is
specially designed to evaporate materials such as As, Sb, Se, Zn, etc.
The evaporation temperature of these elements is below 800° C. The
crucible has a large capacity to allow maximum uptime. A good stability
of the molecular beam flux is achieved through a special design of the
heating system and the thermocouple.
Applications:
| Material |
Symbol |
Crucible |
Melting Point (°C)
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Temperature (°C) for Vapor Pressure (Torr) |
| |
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| Caesium |
Ce
|
Quartz, PBN
|
29 |
-16
|
22
|
80
|
| Europium |
Eu
|
PBN, Al2O3, Mo, Ta |
822
|
283
|
361
|
466 |
| Lithium |
Li
|
PBN, Al2O3, BeO |
180
|
235
|
306
|
404 |
| Magnesium |
Mg
|
PBN, Al2O3, VC |
650 |
185
|
246
|
327
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Potassium
|
K
|
PBN, Al2O3, Quartz |
64
|
21
|
65
|
123
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Selenium
|
Se
|
PBN
|
221
|
63
|
107
|
164
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| Sodium |
Na |
Quartz, PBN
|
98
|
74
|
123
|
193
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| Strontium |
Sr |
VC, Mo
|
777
|
241
|
309
|
404
|
| Thallium |
TI
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Al2O3, Quartz |
304 |
280
|
360
|
470
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| Ytterbium |
Yb |
Ta
|
824
|
247
|
317
|
417
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| Zinc |
Zn
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Al2O3, Quartz, PBN
|
420
|
123
|
177
|
24 |
* Melting Point (MP)
Technical data:
Standard:
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Type
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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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0°C - 800°C
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Temperature stability
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> 0.1 K depending on the PID controller
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Max. outgas. temp
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1400°C without crucible
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Max. power
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220 W (CF 40) |
Max. current
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8 A |
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Bakeout temperature |
250°C |
Conditioning
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Heated to maximum temperature with and without crucible |
Shipping
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Nitrogen flooded stainless steel container with valve |
Custom:
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| Flange size |
CF 40 / CF 63 / CF 100 or specified
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Max outer diameter
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38 mm / 63 mm / 100 mm etc.
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Length
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As specified
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Thermocouple type
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Type C / WRe 5% - 26% (or specified)
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Crucible material
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PBN / PGR / W / Ta / Mo / quartz
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Crucible capacity
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All standard sizes or specified
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Options:
Hot-lip filament to avoid condensation at the crucible orifice (for Sb, Pb, etc.)
Integrated shutter
Water cooling
Other dimensions
Crucible with insert
Downward looking version |
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