Page 1
DA-TYPE SOCKET
ASSEMBLIES
DEC. 2000
C7246 SERIES
PATENT
The C7246 series is a DA type socket assembly designed for 28 mm (1-1/8 inch) diameter side-on and head-on
photomultiplier tubes. The C7246 series socket assembly incorporates a voltage-divider circuit and a current-to-voltage
conversion circuit along with an amplifier that has a narrow but practical bandwidth (0 kHz to 20 kHz) to improve the
effective S/N ratio.
The C7246 series converts the low-level, high-impedance current of a photomultiplier tube into a low-impedance
voltage output by a factor of 0.3 V/ µA.
Since the C7246 series employs an active voltage-divider circuit, it ensures an excellent DC linearity at low power
consumption and a gain adjustment function that does not affect the frequency bandwidth of the amplifier.
FEATURES
Low power consumption
•
Low offset voltage
•
Adjustable gain function
•
Compact and light weight
•
SPECIFICATIONS
Parameter
Applicable Photomultiplier Tubes
R374, R2228, R5929, R6095, etc
C7246
28 mm Dia. Head-on
MAXIMUM RATINGS
Parameter
Input Voltage for Amplifier
Supply Voltage for Divider
Operating Temperature
Storage Temperature
Value Unit
±18
-1500 V dc
0 to +40 ˚C
-15 to +60 ˚C
GENERAL
Parameter
Input Voltage for Amplifier
Input Current for Amplifier (at ±15 V)
Recommended Supply Voltage for Divider
Divider Current (at HV=-1000 V, VR=MIN)
Current to Voltage Conversion Factor
Maximum Output Voltage (with no load resistor)
Output Voltage (with 50 Ω load resistor)
Maximum Input Signal Current
(at 10 V output, HV=-1000 V with no load resistor)
Frequency Bandwidth (-3 dB)
Output Impedance
Offset Voltage
Output Noise Voltage
Adjustable Gain Range
Total Power Consumption (at ±15 V, HV=-1000 V, VR=MIN)
Weight
a To be also practicable even with ±5 V of input supply voltage except for narrow output range (2 V max).
b Use more than 600 V at negative high voltage input from view-points of output linearity, when giving more than 10 µA at signal input (anode out).
c "VR = MIN." means that the PMT gain is set to minimum gain.
b
c
DC
Pulse µA
C7246 C7246-01
±12 to ±15
530 µA Typ.
-400 to -1000
174
0.3 V/µA
10 V
0.9 V
33 µA
33
0 Hz to 20 kHz
50
±0.3
0.09
190
55
C7246-01
28 mm Dia. Side-on
R928, R3788, R3896, R4220, etc
a
-300 to -1000
211
227
50
Unit
–
–
V dc
Unit
V dc
V dc
µA Typ.
–
Ω
mV Max.
mV rms. Typ.
dB Min.3010
mW Typ.
g Typ.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2000 Hamamatsu Photonics K.K
Page 2
DA-TYPE SOCKET ASSEMBLIES C7246 SERIES
Figure 1. Schematic Diagram
K
DY1 DY2 DY3 DY4 DY5 DY6 DY7 DY8 DY9 DY10 DY11
VR = 5 MΩ
* GAIN ADJ. CIRCUIT
-HV
Figure 2. Frequency Response of Built-in Amplifier
C2C1
C3 C4
TRANSISTOR
CIRCUIT
P
AMP
C1, C2: 0.01 µF
C3: 0.022 µF
C4: 0.047 µF
* PATENT
SIGNAL OUTPUT
50
Ω
TACCC0103EC
TACCB0046EB
10
5
0
-5
-10
RELATIVE GAIN (dB)
-15
-20
0.1 10001
-3dB
10 100
FREQUENCY (kHz)
Page 3
Figure 3. Dimensional Outline (Unit: mm)
C7246 C7246-01
5
3.5
33.0 ± 0.3
7
33.0 ± 0.5
450 ± 10
1)
POT (VR)
31.7 ± 0.3
25.6
GAIN ADJ.
HOUSING
(METAL)
4.7
33.0 ± 0.5
450 ± 10
1)
POT (VR)
38.0 ± 0.3
49.0 ± 0.3
29.0 ± 0.3
31.7 ± 0.3
HOUSING
(METAL)
GAIN ADJ.
-HV
SIGNAL OUTPUT
±15 V
NOTES: 1) Turning this pot clockwise increases the PMT gain. (25 turns max.)
2) At the end of HV cable, it's possible to attach SHV connector fitting RG-174/U.
3) Connect as follows.
Orange Lead ⋅⋅⋅⋅⋅⋅⋅ +15 V
White Lead
Shield
SHIELDED CABLE (COVERING TWISTED PAIR) 3)
⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅
⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅
-15 V
GND
SHIELD CABLE
COAX RG-174/U
2)
RED
BLACK
GRAY
TACCA0175ED
Page 4
DA-TYPE SOCKET ASSEMBLIES C7246 SERIES
OPTIONS
●HOUSING E7718 FOR C7246 (INCLUDING PART #1, 2, 4 AND 5) (Unit: mm)
132
1
HOUSING
2
MAGNETIC SHIELD CASE
3
42
26
1.5
M42 P = 1.5
(FOR FIXING)
1 2 4 5 63
[SUGGESTED FIXTURE LAYOUT FOR THE FLANGE][HOW TO USE THE HOUSING WITH FLANGE]
PMT
4
O-RINGS
5
4-M2 SCREWS L = 6
6
C7246
46
60
54
* O-RING
3
10.2
* THE FLANGE AND O-RING ARE AVAILABLE TO ORDER SEPARATELY AS P/N; A7719.
FLANGE *
4-M3
43
54 ± 0.1
TACCA0195EA
●FLANGE SET A7709 FOR C7246-01 (INCLUDING PART #1, 4, 5, 6, 8 AND !0) (Unit: mm)
654321 7
1
INSULATOR (CUSHION)
2
PMT
3
E989 MAGNETIC SHIELD CASE
4
CLAMPING METAL PARTS
5
2-M3 SCREWS L = 5
6
35.2 ± 1
580 ± 2
[SUGGESTED FIXTURE LAYOUT FOR THE FLANGE]
3-M3
54
98 !0
60
FLANGE
7
C7246-01
8
O-RING
9
FIXTURE
!0
2-M3 SCREWS L = 5
48
54 ± 0.1
120°
PATENT: JAPAN 1 [No.2963393], USA 1 [No.5880457
*
DIRECTION OF INCIDENT LIGHT
120°
TACCA0196EA
]
HOMEPAGE URL http://www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Electron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.:
Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: [email protected]
Germany:
Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected]
France:
Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: [email protected]
United Kingdom:
North Europe:
Italy:
Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: [email protected]
Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: [email protected]
Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: [email protected]
TACC1015E04
DEC. 2000 IP
Printed in Japan (500)
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