SU1348662A1 - Optic signal stroboscopic detector - Google Patents

Abstract

The invention relates to electrical measuring equipment and can be used in physical research. The stroboscopic optical signal recorder contains a scanner unit 1, a generator of 2 supply voltage pulses, an adjustable source 3 of a constant voltage N + 1 low-pass filters 4.1-4.N + 1, N lines 5.1-5.N of delay Nt-1 elements 6.1 -6.N + 1 isolation, photomultiplier 7, processing and recording unit 8. The invention improves the accuracy of the device by creating an adjustable decelerating field in each interstitial gap, eliminating the stretching and phase distortions of the strobe sample. 2 Il. (L Onmuvec / fua this nal / G Photocathode JL JjL4N ". About f - and 6 8 oo oo O5 05 1h :) / g fie.G

Description

one

The invention relates to electrical measuring equipment and can be used in physical research.

The purpose of the invention is to increase the accuracy of the device by creating an adjustable retarding field in each inter-single-gap, eliminating the stretching and phase distortions of the strobe sampling.

Fig. 1 is a block diagram of a stroboscopic optical signal recorder; Fig. 2 shows a constructive embodiment of a regulated constant voltage source of electric filters, DC isolating elements.

The device contains a block 1 time - a screwdriver, a generator of 2 voltage supply pulses, an adjustable source of 3 constant voltage, N + 1 filters 4.1-4, N + 1 low frequencies (FICH), N lines 5.1-5.N delayed J N + 1 elements 6.1-6.N + 1 isolation, photomultiplier 7 (PMT) and processing and recording unit 8.

The device input is connected to the synchronization input of the scanner unit 1, the first output of which is connected to the generator input 2 of the supply voltage pulses, and the second output to the synchronization input of the processing and recording unit 8, the information input of which is connected to the output of the PMT 7, N + 1 outputs of the controlled source 3 DC voltages are connected through the corresponding 4.1-4.N + 1 low-pass filter with the photocathode and N photomultipliers of the PMT 7, respectively, lines 5.1-5. Delays are connected in series, their outputs are connected through the corresponding lean elements 6.2-6.N +1 open to the corresponding dynode of the PMT 7, the output of the generator 2 voltage supply pulses is connected to the input of the first delay line 5.1 and through the 6.1 output cable to the photocathode of the PMT 7.

The device works as follows.

The sync input of the sweep unit 1 is supplied with an electrical synchronization pulse. The output pulse of the scanner unit 1 is fed to the input of the generator 2 of the supply voltage pulses, which generate a supply voltage pulse of negative polarity, which is supplied to

NII 5.1-5.N delays connected in series with each other, and through element 6.1 of isolation to the photocathode of the photomultiplier 7. From the output of each delay line, the supply voltage pulse through the corresponding elements 6.2–6. uncoupling is applied sequentially to the dinodes of the photomultiplier 7. At the photocathode and di1Q of the photomultiplier tube 7 through the low-pass filter 4.1-4.N-I-1

a constant voltage source 3 is applied to the photocathode and dynoes of the photomultiplier 7 constant voltage, creating in the inter-void spacings

15 braking electrons electric field. HGF 4.1-4.N + 1 prevent the passage of a voltage pulse through an adjustable source 3 constant voltage, mine lines

20 delays, and elements 6, i-6.N + 1 folds eliminate shunting of dynodes with DC current-delay lines, but completely transmit a pulse to the supply voltage. At the moment of time, which is received for the gating interval, an optical signal is applied to the photocathode of the PMT 7, which has a hard synchronization with the trigger pulses. Electrical signals from the output of the PMT 7 are fed to the processing and recording unit 8, where, after expansion, amplification and accumulation, the i-mH recorder i-mH is transmitted to the electron beam indicator (not shown), which is slow for a time base from block 1 sweep.

Constructive execution of the source 3, the low-pass filter 4, the elements 6 sweep presented in figure 2. Here, two 40 ppm of constant voltage source 9 and variable resistors 10 constitute adjustable constant voltage source 3 (Fig. 1). The magnitude of the output voltage produced by the source 9 is usually t 200 V, the variable resistor 10 has a nominal value in the range of ten kOhm. Capacitors II perform the function of 6.1-6.N + 1 isolators,

gQ their capacity is the value

10 pF. The resistor 12 and the capacitor 13 form F1 {4 4 (figure 1). The resistance value of the resistor 12 must be much greater than the wave resistance of the 5.1-5.N delay lines and is equal to units of kOhm. The capacitance value of the capacitor 13 is determined by the duration of the supply voltage pulse.

f.

,)

I 50 NS / and the resistance value

Rezstor 12 and composes the value of l (f pF.

When registering an optical signal by changing the DC voltage at the dynoids of the photomultiplier, an accurate time combination of the propagation of the voltage of the supply voltage and the strobe sampling in the dynodic system is obtained, which allows recording the information input to obtain the maximum strobe gain in the dynodic system. In addition, the constant voltage at the dynodes creates a decelerating electric field in each inter-single spreading constant source, which eliminates the stretch and temporal distortion of the strobe sampling.

Thus, in the proposed stroboscopic recorder, the accuracy of recording the optical signal of a 2o signal through appropriate filters is compared with the prototype type.

Claims (1)

Claims of invention A stroboscopic optical signal recorder comprising a scanning unit, a photomultiplier tube, a voltage supply pulse generator, N delay lines connected in series, and a processing and recording unit, the input The low-frequency links are connected to the photocathode and N dynodes of the photoelectron multiplier. The dynodes of the photoelectron multiplier are connected to the outputs of the delay lines via the corresponding N-section isolators, and the input of the first delay line through the Ni-1-th element of the isolator. current connected to the photocathode 30 photomultiplier tube, device is connected to the synchronization input of the scanner, the first output of which is connected to the input of the voltage supply voltage pulse generator, the output of which is connected to the input of the first delay line, the second output of the scanner is connected to the synchronization input of the processing unit and Secondly, it is connected to the output of a photomultiplier tube, characterized in that, in order to increase accuracy, regenertions, N + low-pass filters and N + I DC disconnect elements are introduced into it, and N + 1 outputs of an adjustable constant-voltage source through the appropriate filter The low-frequency links are connected to the photocathode and N dynodes of the photomultiplier tube, and the dynoids of the photomultiplier tube are connected to the outputs of the delay lines via the corresponding N junction elements, and the input of the first delay line is connected via a Ni-1 junction element to DC. connected to photocathode photomultiplier tube, Electrode of PMT L U fig 2 Compiled by V. Bykov Editor E. Kopcha Tehred M. Hodanich Proofreader V. Girn Order 5180/40 Circulation 775 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4