The end stations
The sample holders
We have available 4 sample holders (XL25 VG standard) for different uses. The sample holders 1 and 4 allows to heat and cool down samples, differently sample horders 2 and 3.
Sample holder 1 (with Mo plate)
Sample holder 2
Sample holder 3
Sample holder 4 (electron bombardment)
The specifications of the standard XL 25 sample are given below. For further details, click here.
Sample Size: 25.4mm Diameter (N.B. The block sample holder + sample has to pass through a copper gasket of inner diameter 40 mm).
Sample holder 1 (heater element)
Heating: Maximum Continuous Current: 1.2 Amps. Maximum Short Term Current: 5 Amps for up to 10 minutes from a cold start. If the element is pre-heated, this must be reduced accordingly. The heater element is pyrolytic graphite (PG) encapsulated in pyrolytic boron nitride (PBN). The heating resistance is about 15 ohms.
Cooling: Minimum Temperature -170°C (100K).Time to Minimum Temperature* (about 60 minutes).
Current (Amps)
Temperature (°C)
Power (W)
1.2
500
8
1.5
600
13
2.0
700
23
2.5
800
35
3.0
900
60
3.5
1000
100
Current (Amps)
Temperature (°C)
0.1
40
0.2
90
0.3
135
0.4
180
0.5
220
0.6
260
0.7
300
0.8
320
0.9
340
1.0
36
Sample holder 4 (electron bombardment)
The sample holder 4 permits to heat samples by electron bombardment. The home made filament is made in 0.2 mm annealed Goodfellow thoriated tungsten.
With a filament current of 3.4 Amps, we reached a temperature of 800°C, sample grounded.
Details of XL25
Picture of XL25 sample holder
