GMI-41A

INJECTRON

The GMI-41A injectron is used for pulse power switching in pulse modulators in RF equipment

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic
Cooling: oil or water for anode, oil for stem and bulb.
Height: at most 420 mm.
Diameter: at most 162 mm.
Mass: at most 15 kg

P - heater; KP - cathode and heater (connected with pump cathode); A - anode; EU - control electrode; AH - anode of magnetic electric-discharge pump

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C	-60 to +85
Relative humidity at +40 °C, %	98

BASIC DATA Electrical Parameters
Heater voltage (AC or DC), V	20
Heater current, A	9-11
Anode voltage, kV	24
Control electrode voltage, kV	-1
Peak control electrode excess voltage, kV	19
Negative control electrode cutoff voltage, absolute value (at anode voltage 190 kV, anode current at most 3 mA), V, at most	400
Peak anode current at heater voltage 20 V, A	225
Peak control electrode current, A, at most	7
Interelectrode capacitance, pF:
input, at most	100
output, at most	2
transfer,at most	20

Limit Operating Values
Heater voltage (AC or DC), V	18-22
Anode voltage, kV	180
Negative control electrode voltage, absolute value, kV	1
Peak control electrode excess voltage, kV	20
Anode dissipation, kW:
with water cooling	10
with oil cooling	5
Control electrode dissipation, W	250
Peak cathode current at 1/duty factor 600, A	250
Maximum pulse duration, µs	15
Minimum warm up time, s	360

Characteristic Curves Showing Anode Current and Control Electrode Current versus Anode Voltage:
U_f = 20V;
_____ anode current I_a;
_ _ _ control electrode current I_g