CX1174 ETC, CX1174 Datasheet - Page 2

• Manufacturer Part Number: CX1174
• Description: Deuterium-Filled Ceramic Thyratron
• Manufacturer: ETC

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MAXIMUM AND MINIMUM RATINGS
These ratings cannot necessarily be used simultaneously, and
no individual rating must be exceeded.
Anode (Pulse Modulator Service)
Peak forward anode voltage
Peak inverse anode voltage
Peak anode current
Peak anode current (pulse
Average anode current . . . . –
Rate of rise of anode current
Pulse repetition rate
Anode (Single Shot, see note 8)
DC forward anode voltage . . . . .
Peak anode current
Rate of rise of anode current . . . . . . .
Total conducted charge:
Repetition frequency . . . . . . . 1 pulse per 10 s max
Grid 2
Unloaded grid 2 drive pulse voltage
Grid 2 pulse duration . . . . . . .
Rate of rise of grid 2 pulse
Grid 2 pulse delay . . . . . . . .
Peak inverse grid 2 voltage . . . . .
Loaded grid 2 bias voltage . . . . 750
Forward impedance of
Grid 1 – Pulsed
Unloaded grid 1 drive pulse voltage
Grid 1 pulse duration . . . . . . .
Rate of rise of grid 1 pulse
Peak inverse grid 1 voltage . . . . .
Loaded grid 1 bias voltage . . . . . . . . see note 10
Peak grid 1 drive current
Grid 1 – DC Primed (See note 11)
DC grid 1 unloaded priming voltage .
DC grid 1 priming current
Cathode
Heater voltage . . . . . . . . .
Heating time
Reservoir
Heater voltage (see note 1) . . . . .
Heating time
CX1174, page 2
4
(see note 3) . . . . . . . –
(see note 4) . . . . . . . –
repetition rate limited
to 60 pps max) . . . . . . –
(see notes 5 and 6) . . . . . –
(see note 7) . . . . . . . –
capacitor discharge
power supply follow-on . . . . .
(see note 9) . . . . . . . .
(see note 6) . . . . . . . .
grid 2 drive circuit . . . . . .
(see note 9) . . . . . . . .
(see note 6) . . . . . . . . .
. . . . . . . .
. . . . . . . .
. . . . . –
. . . . . . .
. . . . . .
. . . . .
. . . .
Min Typical Max
500
400
10
50
75
75
15
15
Min
400
–
–
–
–
0.5
0.5
–
2.0
1.0
–
0.5
4.5
10
6.3
–
–
6.0
–
–
7180
7 0.0
+ 0.3
2000
1000
450
500
450
150
150
Max
30
40
18
40
35
0.4
–
–
3.0
–
–
1.5
–
6.5
–
see note 5
–
8.0
4.0
–
–
kA/ms
kV/ms
kV/ms
pps
mA
min
min
kA
kA
kA
kV
kV
kV
ms
ms
ms
A
O
A
C
C
V
V
V
V
V
V
V
V
Environmental
Ambient temperature . . . . . . 750
Altitude
CHARACTERISTICS
Critical DC anode voltage for
Anode delay time
Anode delay time drift
Time jitter (see note 12) . . . . –
Recovery time . . . . . . . . . . . .
Cathode heater current
Reservoir heater current
NOTES
1. The reservoir heater must be decoupled with a suitable
2. The tube must be mounted by means of its mounting
3. Under resonant charging conditions a maximum anode
4. The peak inverse voltage including spike must not exceed
5. For single-shot or burst mode applications this parameter
6. This rate of rise refers to that part of the leading edge of
7. This thyratron has a long recovery time (50 – 100 ms). The
conduction (see note 12) . . . –
(see notes 12 and 13) . . . . –
(see notes 12 and 14) . . . . –
(at 6.3 V) . . . . . . .
(at 5.0 V) . . . . . . . . 8.0
capacitor to avoid damage by spike voltages. The
recommended reservoir heater voltage for each individual
tube is stamped on the tube envelope. This recommended
value is determined for hold-off at the maximum anode
voltage under DC conditions. For lower voltages and
modulator operation the reservoir heater voltage should be
increased to a value consistent with voltage hold-off at the
operating level. Maximum reservoir voltage (i.e. maximum
gas pressure in the tube) is one prerequisite for maximum
thyratron life. The reservoir voltage should be stabilised to
+ 0.05 V.
flange.
voltage of 35 kV is recommended. Using command
charging techniques, where the voltage appears at the
anode for only a short time (51 ms), this thyratron may be
operated at up to 40 kV.
10 kV for the first 25 ms after the anode pulse. Amplitude
and rate of rise of inverse voltage contribute greatly to tube
dissipation and electrode damage; if these are not
minimised in the circuit, tube life will be shortened
considerably. The aim should be for an inverse voltage of
3 – 5 kV peak with a rise time of 0.5 ms.
can exceed 150 kA/ms. The ultimate value which can be
attained depends to a large extent upon the external
circuit.
the pulse between 25% and 75% of the pulse amplitude.
amount of time available for thyratron recovery must be
maximised by circuit design, and reliable operation may
necessitate the use of command charging techniques. The
amount of time required for recovery is affected by gas
pressure, peak current, pulse duration and load mismatch
which keeps the thyratron in a conducting state.
. . . . . . . . . . .
Min Typical Max
35
–
– 10 000
15
40
10
# E2V Technologies
0.5
0.1
1.0
+90
50
45
12
3
see note 7
1.0
0.25
5.0
km
kV
8C
ms
ns
ns
A
A
ft