29 mm (1.13") photomultiplier
9124B series data sheet
1 description

6 characteristics

The 9124B is a 29 mm (1.13") diameter, end window
photomultiplier with enhanced green sensitive bialkali
photocathode and 11 high gain, high stability, SbCs dynodesof linear focused design. The 9124QB is a variant for
applications requiring uv sensitivity.

2 applications•••

wide range of applications
x-ray & gamma-ray spectroscopy
photon counting of bio- and chemi-luminescent samples

3 features••••high gainhigh pulsed linearity
good SERgood pulse height resolution

4 window characteristics
9124B
borosilicate

9124QB*
fused silica

280 - 680
1.49

160 - 680
1.46300
250
100<10<10<10spectral range**(nm)refractive index (nd)KThU(ppm)(ppb)(ppb)* note that the sidewall of the envelope contains graded seals of high K content** wavelength range over which quantum efficiency exceeds 1 % of peak

5 typical spectral response curves

unit

min

photocathode: bialkali
active diametermm
quantum efficiency at peak%luminous sensitivityµA/lmwith CB filter
with CR filter
dynodes: 11LFSbCs
anode sensitivity in divider A:
nominal anode sensitivity
A/lmmax. rated anode sensitivity
A/lm
overall V for nominal A/lm
V
overall V for max. rated A/lm
V6gain at nominal A/lm
x 10
dark current at 20 ºC:
dc at nominal A/lmnA
dc at max. rated A/lm
nA-1
dark count rates
afterpulse rate:%
afterpulse time windowµs
pulsed linearity (-5% deviation):
divider AmA
divider BmApulse height resolution:
single electron peak to valley
ratio
137
Cs with 1” x 1” Nal(T1)rate effect ( Ia for g/g=1%):µA
magnetic field sensitivity:
the field for which the output
decreases by 50 %-4
most sensitive direction
T x 10-1
temperature coefficient:% ºC
timing:single electron rise timenssingle electron (fwhm)
nssingle electron jitter (fwhm)
nstransit timensweight:g
maximum ratings:
anode currentµA
cathode current
nA
6gain
x 10
sensitivity
A/lm
temperature°C(1)
V (k-a)VV (k-d1)
V(2)
V (d-d)Vambient pressure (absolute)kPa(1)

subject to not exceeding max. rated sensitivity

typmax

25
26
90
115

7200
2000
1050
1400
20.1

1300

0.3
3200
156.4

25100
1.7
7.5
20

2
± 0.5
354
33
50
100
100
22
2000
60
2000
300
300
202-30(2)subject to not exceeding max rated V(k-a)

7 typical voltage gain characteristics

%

308

10

0

10

2,000
1,000
Q

100

200
100

B

300

500
wavelength nm

710700900

6divider A

10

divider B

10510

10.1

410

0.2

0.4

0.6

0.8

1.0

1.2

Vk-a (kV)

1.4

1.61.82.0

gai n20A/ l mquantum efficiency

10,000

8 voltage divider distribution
kd1 d2d8

d9 d10 d11

11 ordering informationaA

2RRRR

B

2RRR

2R 3R 4R 3RR

R9124B series data sheet
page 2

RStandardHigh Pulsed
Linearity

Characteristics contained in this data sheet refer to divider A
unless stated otherwise.

The 9124B meets the specification given in this data sheet.
You may order variants by adding a suffix to the type number.
You may also order options by adding a suffix to the typenumber. You may order product with specification options
by discussing your requirements with us. If your selection
option is for one-off order, then the product will be referred toas 9124A. For a repeat order, ET Enterprises will give theproduct a two digit suffix after the letter B, for example B21.
This identifies your specific requirement.

9124
9 external dimensions mmwindow variantsQ

fused silica

options28.2 maxEelectrostatic shielding
see drawing below
electromagnetic shielding
see drawing below
supplied with spectral
response calibrationSM

specification options
BA

112 ± 3as given in data sheet
single order toselected specification
repeat order toselected specification

Bnn

29 max withelectrostatic
shielding

12.7 max

29.3 max withelectromagnetic
shieldingconductive coating(for E option)

10 base configuration (viewed from below)

mumetal* shield(for S option)
insulating sleeve(for E & S options)

d11d9

ad10

786d8
9
105

d7 4
d5 3d3

11 d4

B14B
2ic

1d6

12

14

13

d1

d2

k

12 voltage dividers‘ic’ indicates an internal connection

The standard voltage dividers available for this pmt aretabulated below:k

Our range of B14B sockets, available for this series, includes
versions with or without a mounting flange, and versions withcontacts for mounting directly onto printed circuit boards.

d1 d2

d7d9d8d10 d11 a

C637A

2R

R

R

R

C637B

2R

R

R

2R 3R

C637C

150 V

R

R

R

R
R

R

R

4R 3R
R

R

R = 330k Ω*mumetal is a registered trademark of Magnetic Shield Corporation

ET Enterprises Limited
45 Riverside Way
Uxbridge UB8 2YF
United Kingdom
tel: +44 (0) 1895 200880
fax: +44 (0) 1895 270873
e-mail: sales@et-enterprises.com
web site: www.et-enterprises.com

ADIT Electron Tubes
300 Crane Street
Sweetwater TX 79556 USA
tel: (325) 235 1418
toll free: (800) 399 4557
fax: (325) 235 2872
e-mail: sales@electrontubes.com
web site: www.electrontubes.com

choose accessories for this pmt on our website

an ISO 9001 registered company
The company reserves the right to modify these designs and specifications without notice.
Developmental devices are intended for evaluation and no obligation is assumed for future
manufacture. While every effort is made to ensure accuracy of published information thecompany cannot be held responsible for errors or consequences arising therefrom.

© ET Enterprises Ltd, 2010

DS_ 9124B Issue 7 (23/08/10)