C7950 HAMAMATSU | Alldatasheet
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Figure 1: Schmatic Diagram NOTE: A To be shown with the time period of setting to stable high voltage from changing control voltage (V cont). B No condensation 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. ©2005 Hamamatsu Photonics K.K. Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. GENERAL GWide Frequency Bandwidth GFast High Voltage Programming Response GWide High Voltage Output Range GCompact and Lightweight HIGH VOLTAGE POWER SUPPLY SOCKET ASSEMBLY WITH WIDE BANDWIDTH AMPLIFIER (DAP-TYPE) C7950 SERIES The C7950 series is a DAP type socket assembly designed for 28 mm (1-1/8") diameter, head-on and side-on photomultiplier tubes (PMT). The C7950 series socket assembly incorporates a regulated high voltage power supply, an active voltage divider and a current-to-voltage c onversion circuit, along with an amplifier having a wide bandwidth (0 Hz to 5 MHz). The C7950 series converts the small-current high-impedance output of the PMT into a low-impedance voltage output with a conversion factor of 0.3 V/µA. The C7950 series enables simple yet stable PMT operations by supplying ±15 V and connecting to control voltage (0 V to +3.6 V) for high voltage adjustments. Figure 2: Wire Connection PMT SOCKET WIDE BANDWIDTH AMPLIFIER ACTIVE VOLTAGE DIVIDER HIGH VOLTAGE POWER SUPPLY 50 Ω SIGNAL OUTPUT (COAX) -15 V INPUT (BLUE) * Cannot control HV output by a potentiometer. +15 V INPUT (RED) Vcont INPUT (WHITE) GND (SHIELD) ORANGEV REFCONTROL (GRAY) HV ADJ SIG OUT (BLACK) WHITE SHIELD RED+15 V±15 V IN (LIGHT-BLUE) -15 V BLUE SHIELD SHIELD SIG OUT GND HV CONTROL (0 V to +3.6 V) NC -15 V +15 V GND GND TACCC0125EA TACCC0126EA Parameter Unit Applicable Photomultiplier Tube Type of Voltage Divider Input Voltage Range Max. Input Voltage Input Current Output Voltage Maximum Input Signal Current (at 13 V output) Line Regulation Against Input Change HV Ripple Noise (peak to peak) Control Voltage / Output Voltage Ratio Output Voltage Control (External Controlling Voltage) Settling Time A Frequency Bandwidth (-3 dB) Current to Voltage Conversion Factor Maximum Output Voltage (with no load resistor at 5 MHz) Output Impedance Offset Voltage Output Noise Voltage (with no load resistor) Operating Ambient Temperature B Storage Temperature B Weight +15 V -15 V Vcont: 3.6 V to 1.6 V Vcont: 1.6 V to 3.6 V Typ. Typ. Typ. Typ. Typ. Typ. Typ. Typ. Typ. Active +14 to +16 / -14 to -16 +18 / -18 0 to -900 ±0.03 0.03 1: -250 0 to +3.6 300
0 Hz to 5 MHz
0.3 ±10 0 to +40 -15 to +60 V V mA mA V µA V ms ms V/µA V p Ω mV mV rms g 28 mm dia. Head-On Type (R5929, R6094 etc.) C7950-01 28 mm dia. Side-On Type C7950 SPECIFICATIONS