29 mm (1.13") photomultiplier
9924B series data sheet
1 description

6 characteristics

The 9924B is a 29 mm (1.13”) diameter, end window
photomultiplier with enhanced green sensitive bialkali
photocathode and 11 high gain, high stability, SbCs dynodesof box and grid design. The 9924QB 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 featureshigh gain
low operating voltage
good SER

4 window characteristics

spectral range**(nm)refractive index (nd)9924B
borosilicate

9924QB*
fused silica

280 - 680
1.49

160 - 680
1.46300
250
100<10<10<10radiopurity:
K(ppm)Th (ppb)
U(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

photocathode: bialkali
active diametermm
quantum efficiency at peak%luminous sensitivityµA/lmwith CB filter
with CR filter
dynodes: 11BGSbCs
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/lmnA
-1dark count ratespulsed linearity (-5% deviation):
divider AmAµA
rate effect ( Ia for ∆g/g=1%):
magnetic field sensitivity:
the field for which the output
decreases by 50 %-4
most sensitive direction
T x 10-1
temperature coefficient:% ºCtiming:
single electron rise timenssingle electron (fwhm)
nstransit timensweight:gmaximum ratings:
anode currentµA
cathode currentnA
6gainx 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

5 typical spectral response curves

252695
127.5

8200
2000
900
1200
20.2
2200

100

B

300

500
wavelength nm

700

50.1
202
± 0.5
15308555100
2521200060
2000
300
300
202-30(2)subject to not exceeding max rated V(k-a)

82,0001,000

102001001076divider A

105104

101050

10A/ l m

Qmax

10,0002010

typ7 typical voltage gain characteristics

30quant um ef f i ci ency %

••
•

min

900

0.1

10

0.2

0.4

0.6

0.8

1.0

1.2

Vk-a (kV)

1.4

1.6

1.8

2.0gai n•••unit8 voltage divider distribution
kd1 d2

A 150V Rd8

d9 d10 d11

RRR2R9924B series data sheet
page 211 ordering informationaRStandardCharacteristics contained in this data sheet refer to divider A
unless stated otherwise.

9 external dimensions mmThe 9924B 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 tothe type number. You may order product with specification
options by discussing your requirements with us. If yourselection option is for one-off order, then the product will bereferred to as 9924A. For a repeat order, ET Enterprises will
give the product a two digit suffix after the letter B, forexample B21. This identifies your specific requirement.

9924

28.2 max

window variantsQ

fused silica

options
Eelectrostatic shielding
see drawing below
electromagnetic shielding
see drawing below
supplied with spectral
response calibration

S
112 ± 3M

specification options
BA
12.7 max

as given in data sheet
single order toselected specification
repeat order toselected specification

Bnn

29 max withelectrostatic
shielding

10 base configuration (viewed from below)

d11
d9

ad10

786d8
10d7 4d5 3
d3

conductive coating(for E option)

95ic

1d6mumetal* shield(for S option)

11 d4

B14B2

121413d1

29.3 max withelectromagneticshielding

d2

insulating sleeve(for E & S options)k‘ic’ indicates an internal connection*mumetal is a registered trademark of Magnetic Shield Corporation

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.

12 voltage dividers
The standard voltage dividers available for these pmts aretabulated below:
kd1

d2

d7

d8

d9

d10 d11 aC637E

2RRRRR

2R R

C737G

150V RRRR

2R R

R = 330 kΩ

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 and ISO 14001 registered companyThe 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, 2014

DS_ 9924B Issue 6 (26/02/14)