SU1595268A1 - Device for controlling sensitivity of photoelectronic multiplier - Google Patents

Abstract

The invention relates to electronic technology and can be used, in particular, to measure the parameters of radiation pulses in an automatic mode. The purpose of the invention is to simplify the device and extend the functionality by providing independent adjustment of voltage pulses. The device contains a high-voltage power supply source I, connectors 2 and 3, as well as connectors 4 and 5, cable 6 delays, voltage divider 7, dinodes 3, electronic switch 9 on avalanche transistor, semiconductor optical emitter 12, photoelectric converter 13. Electronic switch 9 is connected via output 28 to viewer 29 of divider 7. A sufficient range of sensitivity changes is achieved by varying the potentials of several dynodes. The simplification of the device and the expansion of its functionality are provided by the functionalities introduced into it by dp formed by voltage pulses on various dyons. 1 W1. § (L s

Description

The invention relates to electronic engineering and can be used, in particular, in measuring the parameters of radiation pulses in an automatic mode.

The purpose of the invention is to simplify the devices and extend the functionality by providing independent voltage regulation.

The drawing shows a circuit diagram of a device for controlling the sensitivity of a PMT.

The device contains a high-voltage power source I power type SB K20;

HMO type 660.042 connector 2, which serves as a terminal dp for charging the power source I; connector type 3 TR-75-155FV analog output signal; connector

4 types СР-75-155ФВ of the output integrated signal; two connectors

5 types СР-75-166ФВ yes connections cable 6 delays of the type PK-75-4-13; voltage divider 7 of a CCI8-1 type photodetector with outputs dp connecting dynodes of PMT 8 of type SNFT-3; electronic key 9 on avalanche transistor type 2Т312Б, first output

10 of which is connected to the output of the 1I divider 7; semiconductor optical emitter 12 and photoelectric

CP JV

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a cus converter 13, constituting one: 1st serial opto-coupler of the type OU103B; the first resistor 14 of the type MLT -0.5-1.2 kΩ ± 20% -Bj the second resistor 15 of the Type MLT - 0.5-39 kOa ± ± 2.0% - V; MLT-1 0-240KONtlO% -B n 17 resistors 16 of the MPT-1.0-220 type, which are increased compared to the standard splitter 7 resistors by 18 and AND kOhm, respectively, to compensate for device leaks and are chosen so that disrupt the normal operation of the FEZ 8; resistor 18 of type MPT-O, 5-270 kOhm1 ± JO% -3, also increased in comparison with standard; resistor type 19 MLT-0.5-11 .KΩ ± 10% -V | Resistor 20 of type MLT-0.5-750m ± 10% -B and resistor 21 of type MPH-0.5-OM ± 10%. In which also is increased compared with the standard; the first capacitor 22 of the type K21-8a-M150 4.7n120% -B5 the second capacitor 23 of the type K, 21-8a-M150-47nch; ± 20% -B and the third capacitor 24 of type K21-8a-MI50-22Ht20% -B5 capacitor 25 of type K15-5-H50-6, ЗкВ-220пФ + | 0%; the capacitor 26 of the type K15-5-K50-1.6kV-680irf tlO% and the capacitor 27 of the type K15-5 - H50-ЗкВ-15n ± 10%. The second key 28 of the electronic key 9 is connected through parallel to the condenser 22 and the optical emitter S2 is connected to the bridge 29 of the divider 7. The photoelectric converter 13 is connected between the serially connected capacitor 23 and the resistor 15, the connection point of which is connected to the output 30 of the divider 7. One From the photoelectric converter 13 outputs, the output 31 of the divider 7 is connected, and the other output through the resistor 15 is connected to the output 30 of the divider 7 to connect to the 32- (m-Hi) and through the capacitor 24 with a terminal for connecting to the dynode 32- (PMI), where the indices in brackets denote the numbers of dynodes in the FZU, npiT with this, the output terminal for connecting the dynode 32- (t) with the output is connected to the output of the 11th divider. 31 divider 7 is connected through a resistor to the terminal for connecting the dynode 32 - (m + n - “- 1). The power source I is connected via connector .2 to divider 7. The output of P. divider 7 is connected to the output 10 of the switch 9 and one of the terminals of the resistor 14; output 30 - with one of the terminals of the capacitor 23 and one of the terminals of the resistor 15 $ output 31 - with

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15

20

25

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the other terminal of the capacitor 23 and one of the transducer outputs 13, the Input 33 of the key 9 is connected to another output of the resistor 14 and one of the outputs of the capacitor 25, the other output of which is connected to one of the terminals of the resistor 19, the other output of which is connected to the connector 5. The other output converter 13 is connected to another output of resistor 15 n to one of their terminals of capacitor 24, which is connected to dynode 32 with its second output. Condenser 26 is connected to its other terminal to dino 34 by its other output. Output 35 to one of capacitors 26; output 36 - with one of the pins of the resistor 18, the outputs of the divider 7, connected to the dinodes of the PMT, are connected via capacitors to a common bus, in particular through capacitors 37 and 38. The capacitor 27 is connected between the dynode 34 and the connector 4. The resistor 16 is connected between the output Both the output 2-) divider 7. Resistor 17 is turned on at outputs 30 and 31 of divider 7. Rezlstor 18 is connected between dynodes 32 and output 36 of divider 7. Resistor 20 is connected between connector 5 and the common bus of the device. Resistor 21 is connected between dynode 34 and output 35 of divider 7,

The device works as follows,

In the initial state, the key 9 is open, the capacitors 23, 24, 37, 38 are charged with the potential difference of their connection points; The sensitivity of the PMT 8 is maximum. After the arrival of the starting pulse (from the anode of the photomultiplier 8 through the cable 6 delay line, which simultaneously plays the role of a signal inverter or from an external source), the key 9 operates and shunts the gap j between the output 11 and the output 29 of the separator 7. I. discharge current pulse the capacitor 37 flowing through the key 9, causes the glow of the radiator 12 and slab-. The photoelectric converter 13. The voltage on the capacitor 23 is applied to the resistor 15 and applied through a coupling capacitor 24 to the dynode 32 (m + n + 1), creating a decelerating field between the dyno 32 - (t-IL) and 32- (mfnH). The gain of the PMT 8 decreases dramatically. The capacitor 22 provides the desired shape of the current pulse of the emitter 12. Capacitors 26,

thirty

35

40

50

55

five

27, 24 are passive integrator and dividing capacitors, respectively. Resistor | 4 sets the operating point of the kcha 9 transistor. Reistor 18 converts the discharge current of capacitor 24 to a decelerating potential difference. Resistor 19 limits the key starting current 9. Resistor 20 adapts the cable impedance b to the input resistance of key 9, resistor 21 discharges capacitor 26. After the discharge of capacitors 23, 24, 37 and 38 ends, they start to be charged from source I, and the device the time determined by the corresponding constant charges comes to its original state.

By varying the potentials of several dynods, a sufficient range of sensitivity variations is provided. The simplification of the device and the expansion of the Functional Capabilities are provided by the connections used to generate voltage pulses at various dynodes.

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A device for controlling the sensitivity of a photomultiplier tube containing a power divider of a photomultiplier, the midpoints of which are connected to the dyno photomultiplier tube, and through a capacitor - with a common bus

0

first output through a resistor with a mth dynode of the photomultiplier, the first capacitor, connected by the first method to the w + (n – i) th diode, through the resistor through the resistor, characterized by the fact that , in order to simplify the device and expand its functionality by providing independent adjustment of voltage pulses, a second and third capacitors, a semiconductor optical emitter, 15 photoluminescence converter and an additional resistor are introduced into the Negro, the first output of the switch is connected to the midpoint of the voltage divider corresponding to the tth diode, and the second output of the key through a 20 semiconductor optic emitter is connected to the midpoint of the voltage divider connected to the diiodide adjacent to the second diode, the first output of the optical emitter is connected the first output of the second capacitor, the second output of which is connected to the second output of the optical emitter, optically connected with a photovoltage transducer connected by the first output to the t + (n + 1) -th dynode and the corresponding middle point of the divider nap The first terminal of the third capacitor, the second output of which is connected to t + p-dynode, 5 with the corresponding middle point of the voltage divider, and through the additional resistor - with the second inverter and the second output of the first capacitor.

five

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Claims (1)

Claims 30 A device for controlling the sensitivity of a photomultiplier tube containing a voltage divider supplying a photomultiplier tube, the midpoints of which are connected to the photomultiplier tube diodes, and through capacitors - . a common bus, an electronic switch connected by the first output through a resistor to the pg dynode of the photomultiplier tube, the first capacitor connected to the first output with and the + (n + 1) th dynode, through a resistor. This is due to the fact that, in order to simplify the device and extend the functionality by providing independent adjustment of voltage pulses, it introduced the second and third capacitors, a semiconductor optical emitter, a phototransducer and an additional resistor the first output of the key is connected to the middle point of the voltage divider corresponding to the appropriate d-dynod, and the second output of the key is connected through the semiconductor optical emitter to the middle point of the voltage divider connected to the dynode adjacent to the pg dynode, while the first output of the optical emitter is connected with the first output of the second capacitor, the second output of which is connected to the second output of the optical emitter, optically connected to the phototransducer, connected by the first output to the t + (n + 1) -th dynode and the corresponding he midpoint of a voltage divider and a first terminal of a third capacitor, a second terminal coupled to an m + n-LM dynode, its respective midpoint of the voltage divider and via a further resistor - photoconverter to the second terminal and the second terminal of the first capacitor. 1595268