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Voltage dividers assemblies (Including PMT)
7 -
Assemblies
Voltage dividers assemblies
(Including PMT)
Integreated voltage dividers on PMTs
(XA family)
The XA family consists of a photomultiplier tube, a printed circuit
board supported at the tube base by an insulating stand-off, a
shrink tube sleeve enclosing the circumference of the tube and
a vinyl cap enclosing the tube base. The assembly provides for
exclusion of stray light and electrical isolation of the photocathode
from ground potentials.
Positive and negative high voltage configurations are available
for scintillation-counting, detection and measurement of low-light
level events.
Two types of voltage divider network (VDN) are offered as
standards: type A for increased gain, type B for increased peak
linear anode current (1Vs=200k
)
.
Type
K
G
D1
G2
D2
D3
D
D
D
D7
D8
A
A
1
1
1
1
1
1
1
1
1
1
1
B
1
1
1
1
1
1
1
1.3
1.5
2
3
Assembly
type
Based on PMT
Min Input
Ø (mm)
Characteristics
Assembly components
XA83092E/A1
XP83092E
19
high temp bi-alkali, 175°C
PMT, VDN, magnetic shield
XA83092E/A2
XP83092E
19
high temp bi-alkali, 175°C
PMT, VDN, steel housing
XA83092C/A1
XP83092C
19
high temp bi-alkali, 90°C
PMT, VDN, magnetic shield
XA83092C/A2
XP83092C
19
high temp bi-alkali, 90°C
PMT, VDN, steel housing
XA83112/A1
XP83112
19
high gain
PMT, linear VDN, terminated cables
XA83112/A2
XP83112
19
high pulse linearity
PMT, tapered VDN, terminated cables
XA83112/A3
XP83112
19
---
PMT, linear VDN, magnetic shield
XA83112/A4
XP83112
19
---
PMT, tapered VDN, magnetic shield
XA85001/A1
XP85001
50.8
MCP, UV-sensitive
PMT, VDN, 4 terminated cables
XA85002/A1
XP85002
53
MCP, UV-sensitive
PMT, VDN, 4 terminated cables
XA85011/A1
XP85011
50.8
MCP, UV-sensitive
PMT, VDN, 64-pin output
XA85012/A1
XP85012
53
MCP, UV-sensitive
PMT, VDN, 64-pin output
Note : for MCP based PMT, the minimum input dimension given is the length of the square area.
Ø25.9max
Stainless steel
housing with end cap
2
0
0
m
i
n
7
1
.
5
O
v
e
r
a
l
l

l
e
n
g
t
h
Teflon
Bushing
0.1±0.1
Faceplate
exposure
Ø

3
0
±
2
.
5
124.5 2
±
26.
9
31max
BNC - Anode
signal - output
SHV - Negative
high voltage
610 2
Harness
length
±
Ø25.9max
7.8
Harness access
notch
Magnetic shield
2
0
0
m
i
n
7
1
.
5
O
v
e
r
a
l
l

l
e
n
g
t
h
7.6
Notch depth and
approximate
potting surface
0.1±0.1
Faceplate
exposure
Ø

2
7
.
4
±
0
.
4
Customized assemblies
PHOTONIS designs voltage divider
assemblies, an extremely cost effective way
of meeting your mechanical and electrical
requirements. Supplied attached to the
tube and ready for use, these assemblies
contain a voltage divider and additional
electronic circuitry such as protection
resistors and decoupling components.
They provide the optimum interface
between PMT and your signal-processing
circuitry, ensuring the highest signal quality
in your application (the first stage of your
anode signal amplification chain can be
included). Assemblies
- 77
Assembly type
Based on
PMT
Min Input Ø
(mm)
Characteristics
Assembly components
XS83120/N1
XP83120
25
---
PMT, VDN, power supply (-), 20kHz amplifier
XS83120/N2
XP83120
25
---
PMT, VDN, power supply (-), 200kHz amplifier
XS83120/N3
XP83120
25
---
PMT, VDN, power supply (-), 10MHz amplifier
XS83121/N1
XP83121
25
red-sensitive
PMT, VDN, power supply (-), 20kHz amplifier
XS83121/N2
XP83121
25
red-sensitive
PMT, VDN, power supply (-), 200kHz amplifier
XS83121/N3
XP83121
25
red-sensitive
PMT, VDN, power supply (-), 10MHz amplifier
159
35
Ø 25
Active Area
~450 Leads
PH
O
T
ONIS
Wire Leads
XS83120, XS83121
Photon sensing integrated module
(XS family)
SHV - negative
High voltage
~2 400V
27mm
1.7 max
Faceplate
exposure
33.1mm
Front view
8-1
8-2
7-1
7-2
6-1
6-2
5-1
5-2
3-1
3-2
4-1
4-2
2-1
2-2
1-1
1-2
8-3
8-4
7-3
7-4
6-3
6-4
5-3
5-4
3-3
3-4
4-3
4-4
2-3
2-4
1-3
1-4
8-5
8-6
7-5
7-6
6-5
6-6
5-5
5-6
3-5
3-6
4-5
4-6
2-5
2-6
1-5
1-6
8-7
8-8
7-7
7-8
6-7
6-8
5-7
5-8
3-7
3-8
4-7
4-8
2-7
2-8
1-7
1-8
I.D By row-column, all unidentified pins
are at ground potential.
8 7 6 5 4 3 2 1
8
7
6
5
4
3
2
1
Columns
R
o
w
s
Pixel I.D.
(Front view)
Interface connections
(Rear view)
19
71mm
32
71mm
35
Rear view
(4) 2mm x 32 pin
header
XA85011/A1
Photocathode
27
1.7
Faceplate
exposure
19
71
32
35.5
71
5 5
SHV - negative
High voltage
~240V
(4) BNC - Anode
Signal output
length 560min
10 10
15
35
15
1/4 - 20 Thread
for mounting
1
2
3
4
51min
XA85001/A1
25.4mm
28mm
Front view
59mm
59mm
(4) 2mm x 32 pin
header
6
0
0
m
i
n
ABCDE
A
B
C
D
E
Power Gnd
MCP Output Signal
MCP Output Bias
MCP Input Bias
Cathode Bias
XA85012/A1 78 -
Assemblies
Typical sensitivity curves at 515 nm
0,0001
0,01 0,1
1
10
100
0,01
0,1
1
10
100
1000
10000
100000
Output counts - [kcps]
Incident light power - [pW]
amplifier
active voltage
divider
positive HV PWS
PMT
Vref
discriminator
_
+
shaper
pulse
50
+ 5 Vdc
GND
Output counts
3
95
15
30
6
0
Photocathode center
Ø15
optical window
and photosensive area
1
5
GND black
+5 Vdc red
Output counts
8
4 threaded holes
(M3, D4)
150 ±5
24
3
0

Ø
9 for XD1308
for XD2821
Count Sensitivity (kcps/pW)
Typical spectral
100 200 300 400 500 600 700
1
10
100
Wavelength (nm)
1000
XD2821
XD1308
Assembly
type
Based on PMT
Min Input
Ø (mm)
Characteristics
Assembly components
XD1308
XP1308
9
high gain, low noise,
UV-sensitive
PMT, VDN, power supply (+),
fast amplifier-discriminator
XD2821
XP2822
15
high gain, low noise,
green-sensitive
PMT,VDN, power supply (+),
fast amplifier-discriminator
Photon counting integrated module
(XD family)
Characteristics (at 2°C)
Recommended supply voltage
+4.5 to 5.5
(V)
Max. supply current
200
(mA)
Counting linearity
1)
3.6
(Mcps)
Dead time (DT)
25
(ns)
Max. raw count rate
2)
20
(Mcps)
Output pulse width
20
(Ns)
Output logic
TTL,
positive
1)
: missed, due to pulse pile-up.
The true count rate is N=n/1-n xDT where n is the measured rate.
2)
: max measured rate limit before overload.
XD1308
XD2821
Background noise
typ (cps)
15
20
max (cps)
80
100
Counting sensitivity
at 420 nm
(kcps/pW)
430
430
Counting sensitivity
at 515 nm
min (lcps/pW)
225
250
typ (kcps/pW)
270
300
Max supply voltage
(V)
6
6
Max constant count rate
(Cps)
5M
5M