Manual_Annealing

PBN sample carriers

"Old" PBN sample holder

- Manipulator cooled by air flow

Note: The temperatuers are about 100°C higher when annealed in preparation chamber.


Curret (A) Voltage (V) Temperature (°C)
0.4 6 100°C
0.6 8 150°C
0.7-0.8 10 200°C
1.1 13.6 300°C
1.2 15 327°C
1.6 18.1 400°C
2.1 22.4 500°C




"New" PBN sample holder

- Manipulator cooled by air flow
Curret (A) Voltage (V) Temperature (°C)
0.5 7.5 100°C
0.8 11.3 200°C
1.3 15.3 300°C
1.7 18.7 400°C
2.1 22.2 500°C

 


"All metal" PBN sample holder

- Manipulator cooled by air flow
Curret (A) Voltage (V) Temperature (°C)
1 12.2 270°C
1.2 14.5 327°C
1.8 19.4 470°C
2.0 21.4 504°C

"Elena" PBN sample holder

- Manipulator cooled by air flow
Curret (A) Voltage (V) Temperature (°C)
1.0-1.1 9.2 256°C
1.8-1.9 14.4 420°C



 




Large E-beam sample carrier

Filament radiation annealing, manipulator cooled by air flow

Technical Note: Thoriated W filament, 0.2mm, 13-14 threads

Current (A) Voltage (V) Power (W) Temperature(°C)
1.4 1.8 2.5 50°C
1.8 2.5 4.5 100°C
2.5 4.4 11 210°C
2.9 5.4 15.7 265°C
3.0 5.7 17.1 283°C
3.2 6.3 20.2 300°C
3.5 7.4 25.9 350°C
3.6 7.5 27 361°C
3.8 8.3 31.5 388°C
3.9 8.6 33.5 402°C

Estimated sample temperature vs heater current

Large e-beam temperature vs Current Large e-beam temperature vs Power

HV E-beam annealing, manipulator cooled by air flow

Warning 1: HV on thermocouple pins!
Warning 2
: Operation allowed ontly to the staff.
Warning 3: Filament must be grounded.
Warning 4: Never use PID box to monitor the temperature.

Note: Following data (collected in November 2018) are only approximate, they depend on the filament shape and distance from the Mo plate; the pressure and nature of the used gas.

HV = 750 V, Prep chamber
Filament (A) Emission (mA) Pyrometer (°C)
Emis.=16
Temperature (°C)
+- 30°C
Comment
2.3 30 420 506  
2.4 35 550 623  
3.8 40-42.3 570-600 638-665 pO2=5x10-7 mbar
3.8 51.2 660 736  
3.8 57.4 690 760 pN3B3H6=5x10-7mbar

Small E-beam sample carrier

Filament radiation annealing, manipulator cooled by air flow

Technical Note: Thoriated W filament, 0.2mm, 13-14 threads

Current (A) Voltage (V) Power (W) Temperature(°C) Comment
1.4 1.8 2.5 102 After >10 minutes
3.2 6.2 20 430 +- 30 °C  


HV E-beam annealing, manipulator cooled by air flow

Warning 1: HV on thermocouple pins!
Warning 2
: Operation allowed ontly to the staff.
Warning 3: Filament must be grounded.
Warning 4: Never use PID box to monitor the temperature.

Note: December 2018, HV switched on when Filament current is below 1.5A. Pyrometer aimed on the Mo plate close to the crystal sample.

HV = 750V, Prep. Chamber
Filament (A) Emission (mA) Pyrometer (°C)
Emis.=16
Temperature (°C)
+- 30°C
Comment
3.7 6 440°C 500°C pO2=2x10-6 mbar
3.8 13.2 548°C 600°C pO2=2x10-6 mbar

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Ultima modifica il Mercoledì, 24 Maggio 2023 15:03