Manual_Annealing

Old PBN sample carrier

"Old" PBN sample holder, Manipulator cooled by air flow.

Note: The temperatuers might be somewhat higher when annealed in preparation chamber.

Curret (A) Voltage (V) Temperature (°C)
4.5 min from RT
Temperature °C)
16 min from RT
0 0 24°C 24°C
0.3 5.2 100°C  
0.3-0.4 6.3 140°C  
0.4 7.2 150°C 233°C
0.5 9.2 200°C  
0.6 10.2 280°C  
0.7 13.3 300°C 427°C
0.8 12.7 330°C  
0.8 12.9 390°C  
0.9 15.1 400°C  
1.0 14.8 427°C  
1.0-1.1 15 450°C  
1.2 18.2 500°C  
1.6-1.7 22.5 622°C  
1.9-2.0 25.2 700°C  
2.1 27.3 740°C  

Estimated sample temperature vs. heater current



"Old" PBN sample holder, Manipulator cooled by LN2.

Note: The real temperatures depend on the LN2 flow.

Curret (A) Voltage (V) Temperature (°C)
after 5 - 10 min
0.2 4.9 25°C
0.3 5.2 85°C
0.9 13.9 327°C
1.0 17 340°C
1.2 17 428°C
1.3 20 455°C
1.6 23.4 565°C
1.9 25 650°C
2.2 27 740°C

Estimated sample temperature vs. heater current


Note: The real temperatures depend on the LN2 flow.


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


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

ad
Ultima modifica il Mercoledì, 16 Marzo 2022 11:20