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PDF CX1594 Data sheet ( Hoja de datos )

Número de pieza CX1594
Descripción Five-Gap Ceramic Thyratron
Fabricantes ETC 
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E2V Technologies
CX1594 Deuterium Filled,
Hollow Anode, Five-Gap Ceramic Thyratron
The data to be read in conjunction with the Hydrogen
Thyratron Preamble.
ABRIDGED DATA
Hollow anode, deuterium filled, five-gap thyratron with ceramic
envelope, featuring high peak current, high rate of rise of
current, low jitter and voltage/current reversal.
The patented hollow anode structure enables the tube to cope
with inverse voltage and current without consequent reduction
in its high voltage hold-off capability due to electrode damage.
A reservoir normally operated from a separate heater supply is
incorporated. The reservoir heater voltage can be adjusted to a
value consistent with anode voltage hold-off in order to achieve
the fastest rate of rise of current possible from the tube in the
circuit.
Modulator Service
Peak anode voltage (see note 1) . . . . 150
Peak forward anode current . . . . . . 10
Peak reverse anode current . . . . . . . 5
Average anode current . . . . . . . . 3.0
kV max
kA max
kA max
A max
Crowbar Service
Peak anode voltage (see note 1) . . . . 125
Peak forward anode current . . . . . . 40
Peak reverse anode current . . . . . . 20
Conducted charge . . . . . . . . . 18
kV max
kA max
kA max
C max
GENERAL
Electrical
Cathode (connected internally
to one end of heater) . . . . . . . . oxide coated
Cathode heater voltage
.
.
.
.
.
.
.
.
6.3
+
7
0.3
0.0
V
Cathode heater current . . . . . . . 40
A
Reservoir heater voltage (see note 2) . . . . 5.0
V
Reservoir heater current . . . . . . . 10
A
Tube heating time (minimum) . . . . . 15
min
Inter-electrode capacitances
(each gap) . . . . . . . . . . . 40 pF approx
Mechanical
Seated height
(flange to flange) . . . 566.0 mm (22.283 inches) max
Clearance required
below flanges . . . . . . 57.15 mm (2.250 inches) min
Overall diameter
(mounting flange) . . . 152.4 mm (6.000 inches) nom
Net weight . . . . . . . . 13 kg (29 pounds) approx
Mounting position (see note 3) . . . . . . . . . any
Tube connections . . . . . . . . . . . see outline
Cooling
For all applications, cooling by oil or coolant immersion is
desirable. Further information is contained in the relevant
section of the Preamble.
At and below 55 kV the CX1594 may be cooled by forced-air
directed mainly onto the base, and the ceramic envelope should
be maintained below the maximum rated temperature. An air
flow of at least 2.83 m3/min (100 ft3/min), depending on the
mechanical layout, will be necessary to keep the tube operating
temperatures under the limits specified below.
In addition to 300 W of heater power, the tube dissipates from
100 W per ampere average anode current, rising to 300 W/A at
the highest rates of rise and fall of anode current.
The cathode end of the tube must be cooled whenever heater
voltages are applied, since the cathode flange will reach a
temperature of 120 8C above ambient in the absence of cooling.
Envelope temperature:
ceramic, anode and grids . . . . . . 150
cathode flange and base . . . . . . 120
8C max
8C max
E2V Technologies Limited, Waterhouse Lane, Chelmsford, Essex CM1 2QU England Telephone: +44 (0)1245 493493 Facsimile: +44 (0)1245 492492
e-mail: [email protected] Internet: www.e2vtechnologies.com Holding Company: E2V Holdings Limited
E2V Technologies Inc. 4 Westchester Plaza, PO Box 1482, Elmsford, NY10523-1482 USA Telephone: (914) 592-6050 Facsimile: (914) 592-5148
#E2V Technologies Limited 2002
A1A-CX1594 Issue 2, October 2002
527/5640

1 page




CX1594 pdf
SCHEMATIC DIAGRAM (Modulator Service)
7251 ANODE (+)
R1
R2 C1
R1
R2 C1
R1
R1
R2 C1
R1
R1
R2 C1
R1
R1
R2 C1
R1
G2 R3
GRID 2 DELAYED
WITH RESPECT TO GRID 1
GRID 2 VOLTAGE
500 – 2000 V,
1 ms
0 NEGATIVE BIAS VOLTAGE
CATHODE
HEATER
SUPPLY
RESERVOIR
HEATER
SUPPLY
(VARIABLE)
G1
C2
C3
R4
CATHODE (7)
GRID 0/GRID 1 CURRENT
0.5 – 1.5 A,
2 ms
0.5 ms MIN
GRID 1/GRID 2 DELAY
R1 = 470 O 12 W vitreous enamelled wirewound resistors.
R2 = 5 to 20 MO high voltage resistors with a power rating consistent with forward anode voltage.
R3 = Grid 2 series resistor. 12 W vitreous enamelled wirewound is recommended, of an impedance to match the grid 2 drive
pulse circuit.
R4 = Grid 1 series resistor. 12 W vitreous enamelled wirewound is recommended, of an impedance to match the grid 1 drive
pulse circuit.
C1 = 500 pF capacitors with a voltage rating equal to the peak forward voltage. These capacitors may be required to
balance the voltages across each gap if the anode voltage rises in less than 5 ms.
C2, C3 = Reservoir protection capacitors with a voltage rating 5500 V;
C2 = 1000 pF low inductance (e.g. ceramic),
C3 = 1 mF (e.g. polycarbonate or polypropylene).
Components R3, R4, C2, and C3 should be mounted as close to the tube as possible.
#E2V Technologies
CX1594, page 5

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