Manual_Annealing

PBN sample carriers

IMPORTANT
When the annealing on PBN sample holders is done in the preparation chamber or load-lock, the true temperatures are approximately 150°C higher than those in the following tables for the Main chamber where the sample carrieres are in good thermal contact with thy cryostat.

"Old" PBN sample holder

- Manipulator cooled by air flow

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

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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