PS18080 pages
photomultiplier power base (negative)
PS1808 data sheet
SENS-TECH
SENSOR TECHNOLOGIES
1 description
The PS1808 is a compact photomultiplier power base
incorporating a negative high voltage supply and an active
voltage divider. It is suitable for use with 10 stage, 38 mm
diameter, hardpin photomultipliers with an overall voltage range
of -100 to -1800 V. It is available in two versions: the PS1808/6
operates from a +6 V supply and the PS1808/12 requires +12 V.
It is housed in a cylindrical metal enclosure to provide electrical
screening. Low voltage connections are by 450 mm long
insulated leads, and the anode output is via a 450 mm long
RG174U screened coaxial cable.
The internal high voltage provides power to an active divider,
comprising a series of lower power FETs. The dynode
potentials are provided directly to the socket contacts.
The overall operating voltage for the photomultiplier can be
precisely set using any one of the three programming options
shown in section 9.
2
5
applications
The PS1808 is suitable for the following applications:
analogue
pulsed light
photon counting
3
ratings
input voltage (PS1808/5)
input voltage (PS1808/12)
control voltage
temperature (operating)
+4.75 V to +6.0 V
+12 V to +15 V
0 to +1.8 V
+ 5 °C to +55 °C
features
6
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compact design
freedom from high voltage cables
extremely low ripple
exceptional voltage divider stability with varying anode
current
pulse height linearity up to 20 mA peak currents
sleep mode
schematic diagram
electrode
B14B contacts
DC
HV
yellow
4
ref
specification
input power at Vmax = -1800 V
power conversion efficiency, PO / Pi
input power at Vmax = -1800 V
power conversion efficiency, PO / Pin
output voltage range
line regulation
temperature coefficient
warm up time to 0.3 % of final o/p
discharge time to <40 V with no load
maximum anode current, continuous
anode ripple with 100 kW //5 pF load
weight
+5 V, 65 mA
40 % for +5 V
+12 V, 20 mA
50 % for +12 V
-100 V to -1800 V
0.05 % /V
-1
<0.02 % °C
<2s
<2s
100 µA
100 µV
60 g
black
white
RG174U
example of output voltage with 1.200 volts
applied to control (white) wire
contact electrode voltage contact electrode voltage
d8
d1
8
-300
-1000
1
9
-500
-800
2
d6
d3
10
-700
-600
3
d5
d4
11
-900
-400
4
d7
d2
12
-200
5
d9
nc
13
-1200
floating
6
k
a
14
nc
-100
7
d10
nc - no connection
13
1
11
2
10
3
9
4
8
5
7
k
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
6
red
active divider
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Examples of the Sens-Tech’s range of power bases
a
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