Page Comparison

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Mixing gas: Oxygen

(1)Tuning 428.106.2017Microwave power: 2000 W + 300 W from 18 GHz + 14 GHz klystrons2018

Same as (2) with following deviations: BD: -60 V, decreased argon and oxygen feed, decreased current in mid coil, increased injection B-field. 

Acceleration voltage 18 kV/3.6 mA (HIISI extraction system). Plasma electrode aperture 8 mm in diameter.

(2) Tuning 2927.56.2018 (test with recently assembled 36 segment hexapole were started)). Background pressure in injection still quite high (1.5E-7 mbar).

Microwave power: 2000 W + 500 W from 18 GHz + 14 GHz klystrons klystrons.  Fast tuning on Ar¹²⁺ at 19 kV. Intensity gradually increased when Ar feed was increased. At the total current of around 6 mA a strong spark appeared which destroyed at least puller HV power supply. I didn't have time to measure Ar¹³⁺ but spectrum indicates that it is about 330 µA or slightly more.

(3) Tuning 31.5.2018 about 10 % lower B-fields, 1 kW + 0.4 kW µw power

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Material consumption: N/A

Note: Tuning for Ar⁸⁺, Ar¹²⁺ or Ar¹³⁺ ion beam.

JYFL 14 GHz ECRIS

Mixing gas: Oxygen

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