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photomultiplier tubes. XP2212 Datasheet |
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| Part Number | XP2212 |
| Description | photomultiplier tubes |
| Manufacture | PHOTONIS |
| Total Page | 3 Pages |
| Datasheet |
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photomultiplier tubes
product specification
XP2212
A standard, 12-stage, 51mm (2") tube
Applications :
Description :
High and medium energy physics experiment and industrial applications.
This tube is the low cost solution for a good single electron spectrum
resolution.
Window :
Material :
Photocathode :
Refr. index at 400 nm :
lime glass
bi-alkali
1.54
Multiplier : Structure :
Nb of stages :
linear focused
12
Mass :
110 g
Photocathode characteristics
Spectral range :
Sensitivity • :
þ
Maximum sensitivity at :
Luminous :
Blue :
Radiant, at 400 nm :
Characteristics with voltage divider A
min.: 8.5
Gain slope (vs supp. volt., log/log) :
For an anode blue sensitivity of :
þ Supply voltage :
max.: 2400
min.: 1500
Gain :
þ Anode dark current ‚ :
Background noise ƒ :
Single electron spectrum peak to valley ratio „ :
Pulse height resolution 137 Cs … :
Mean anode sensitivity deviation † :
max.: 10 4
long term (16 h) :
after change of count rate :
vs temperature between 0 and +40 °C at 420 nm :
Gain halved for a magnetic field of :
perpendicular to axis "n” :
parallel to axis "n" :
Characteristics with voltage divider :
B
For a supply voltage of :
Gain :
Linearity (2%) of an. current up to :
Anode pulse ‡ : Rise time :
Duration at half height :
Transit Time :
Capacitance
anode to all :
2000
7x106
250
4
8
36
5
290-650
400
nm
nm
typ.:
typ.:
typ.:
70 µA/lm
10 µA/lmF
75 mA/W
typ.:
9
300
1900
typ.:
typ.:
typ.:
typ.:
3x10 7
15
1500
2
7.2
1
1
- 0.2
0.2
0.1
A
1900
3x107
100
4
8
35
A/lmF
V
nA
cps
%
%
%
%/K
mT
mT
V
mA
ns
ns
ns
pF
PAGE 1/3
15/09/98
ABCDE
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photomultiplier tubes
product specification
XP2212
Recommended voltage divider
Type A for maximum gain
K D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 A
41 11 1 1 1 11 1 1 11
Type B for best timing / linearity compromise
K D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 A
4 1 1 1 1 1 1.25 1.25 1.5 2.25 1.75 2.75 2.5
K: photocathode Dn: dynode A: anode
(total :16)
(total :22.25)
Limiting values
Anode luminous sensitivity :
Supply voltage :
Continuous anode current :
max.:2.0X10 8
max.: 2500
max.: 0.2
V
mA
Voltage between :
D1 and photocathode :
consecutive dynodes :
anode and D12 :
min.:
min.:
300
80
max.:
max.:
max.:
800
400
600
V
V
V
Ambient temperature :
short operation (< 30 mn) :
continuous operation & storage :
min.:
min.:
-30
-30
max.: +80
max.: +50
°C
°C
Notes :
þ Characteristic measured and mentioned on the test ticket of each tube.
• Luminous sensitivity is measured with a tungsten filament lamp with a colour temperature of 2856 ± 5 K. The
blue sensitivity, expressed in A/lmF ("F" as in Filtered) is measured with a tungsten filament lamp with a colour
temperature of 2856 ±. 5 K. Light is transmitted through an interference filter. ‚ Dark current is measured at
ambient temperature, after the tube has been in darkness for approximately 1 min. Lower value can be obtained
after a longer stabilisation period in darkness (approx. 30 min.).
ƒ Noise is measured at ambient temperature. After having been with its protection hood, the tube is placed in
darkness with Vd set to give a value of 3.0 10 7. After a 30mn stabilisation period, noise pulses with a threshold of
1 pC (corresponding to 0.2 photoelectron) are recorded.
„ Peak to valley ratio is defined as the single electron peak value divided b the minimum value on the left of the
peak.
… Pulse amplitude resolution for 137 Cs is measured with NaI(Tl) cylindrical scintillator with a diameter of 50 mm
and a height of 50 mm. The count rate used is 10 4 c/s.
† The mean pulse amplitude deviation is measured by coupling a NaI(Tl) scintillator to the window of the tube. Long
term (16h) deviation is measured by placing a 137Cs source at a distance from the scintillator such that the count
rate is ~1.E+04 c/s, corresponding to an anode current of ~ 300 nA. The mean pulse amplitude deviation after
change of count rate is measured with a 137Cs source at a distance from the scintillator such that the count rate
can be changed from 1.E+04 to 1.E+03 c/s, corresponding to an anode current of ~1 µA and 0.1 µA respectively.
Both tests are carried out according to ANSI-N42-9-1972 of IEEE recommendations.
‡ Measured with a pulse light source, with a pulse duration (FWHM) of approximately 1ns., the cathode being
completely illuminated. The rise time is determined between 10 % and 90 % of the anode pulse amplitude. The
signal transit time is measured between the instant at which the illuminating pulse of the cathode becomes
maximum, and the instant at which the anode pulse reaches its maximum. Rise time, pulse duration and transit
time vary with respect to high tension supply voltage Vht as (Vht)-½.
PAGE 2/3
15/09/98
ABCDE
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