CN204359940U - A kind of microchannel plate travelling wave gating framing camera MCP microstrip line device - Google Patents
A kind of microchannel plate travelling wave gating framing camera MCP microstrip line device Download PDFInfo
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- CN204359940U CN204359940U CN201420575585.5U CN201420575585U CN204359940U CN 204359940 U CN204359940 U CN 204359940U CN 201420575585 U CN201420575585 U CN 201420575585U CN 204359940 U CN204359940 U CN 204359940U
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- microstrip line
- mcp
- travelling wave
- parallel
- microchannel plate
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Abstract
The utility model relates to a kind of microchannel plate travelling wave gating framing camera MCP microstrip line device.Output terminal comprises resistance absorption coupling passage in parallel and monitoring channel; Monitoring channel is used for oscillograph monitoring; Resistance absorption coupling passage adopts resistance in series to absorb coupling; The MCP microstrip line characteristic impedance of microstrip line device equals the resistance absorption coupling passage equiva lent impedance in parallel with monitoring channel.The utility model provides a kind ofly not only fundamentally eliminates the voltage reflection that causes of impedance discontinuity, also can realize the microchannel plate travelling wave gating framing camera MCP microstrip line device that strobe pulse amplitude and waveform are monitored.
Description
Technical field
The utility model belongs to ultrafast diagnostic techniques field, relates to a kind of microchannel plate travelling wave gating framing camera technology, particularly relates to a kind of microchannel plate travelling wave gating framing camera MCP microstrip line device.
Background technology
Microchannel plate (MCP, Microchannel plate) travelling wave gating framing camera is as a kind of two dimensional image measurement mechanism, be widely used in the ultrafast phenomenon diagnosis in X ray and ultraviolet spectral range, become inertial confinement fusion (ICF), the standard diagnostics equipment of the research fields such as high energy high density physics (HEDP), Z constriction (Z-Pinch).
Negative electrode direct plating on MCP input face, is made into micro stripline by MCP travelling wave gating framing camera, not only as input electrode but also as photocathode.High pressure strobe pulse is in the micro-band upward traveling wave transmission of MCP, and the photoelectron being strobed region amplifies through MCP multiplication, then impact fluorescence screen converts visible ray to, finally by CCD read-out system record.The shape of strobe pulse, amplitude directly affect temporal resolution and the flatness of framing camera.Due to MCP microstrip line characteristic impedance general lower (being less than 50 ohm), and to export monitoring system be 50 Ohms system, if direct-coupling exports, will at impedance discontinuity point generation voltage reflection, cause strobe pulse wave form distortion, distortion, and finally cause unevenness and the image fault of MCP gain, therefore the impedance matching of MCP microstrip line output terminal is particularly crucial.
The way that MCP travelling wave gating framing camera micro-strip line impedance coupling is commonly used is transition line coupling, people (mountain ice, Chang Zenghu, the Liu Jinyuan etc. such as such as mountain ice, four-way X ray MCP travelling wave gating framing camera, photon journal, Vol.26, No.5,1997) what the domestic First MCP travelling wave gating framing camera developed adopted is exactly transition line impedance matching methods.In addition, U.S. Lao Lunsi livermore national laboratory (Los Alamos National Laboratory, Los Alamos) people (the David D.Clark et al such as David D.Clark, A New Gated X-Ray Detector for the Orion Laser Facility, Proc.SPIE 8505, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion, 85050K, October 19, 2012) in the X-ray framing camera of its up-to-date development, have employed line transformer impedance match method.Transition line matching method reduces the impact of reflected signal on MCP strobe pulse to a certain extent, but is the increase in the physical dimension of framing image-converter tube; And line transformer impedance match method can only realize some fixing impedance transformation ratio, make it apply and obtain considerable restraint.It is adopt transition line matching method or line transformer Impedance Transformation all can only realize triggering synchronous following function that MCP microstrip line exports monitoring side impedance matching, and the MCP strobe pulse amplitude that can not realize truly and waveform monitoring function.
Utility model content
In order to solve technical matters existing in background technology, the utility model provides a kind of MCP microstrip line output terminal impedance matching scheme, which solves MCP microstrip line in background technology and exports Problems existing in the designing impedance matching of monitoring side.
Concrete technical solution of the present utility model is: a kind of microchannel plate travelling wave gating framing camera MCP microstrip line device, comprise the input end, MCP and the output terminal that connect successively, its special character is: above-mentioned output terminal comprises resistance absorption coupling passage in parallel and monitoring channel; Above-mentioned monitoring channel is used for oscillograph monitoring; Above-mentioned resistance absorption coupling passage adopts resistance in series to absorb coupling; The MCP microstrip line characteristic impedance of above-mentioned microstrip line device equals the resistance absorption coupling passage equiva lent impedance in parallel with monitoring channel;
The parallel connection that above-mentioned resistance absorption coupling passage comprises series winding absorbs microstrip line and absorbing resistor; Above-mentioned parallel connection absorbs microstrip line and is formed by PCB design; Above-mentioned absorbing resistor selects surface mount packages resistor, and its one end absorbs microstrip line with parallel connection and is connected in series, and the other end is connected with PCB stratum by via hole;
Above-mentioned MCP is coated with some independences, microstrip line parallel to each other, every bar microstrip line both as photocathode, simultaneously also as the transmission line of strobe pulse.
The utility model has the advantages that: the utility model adopts Parallel opertation and is connected in series the MCP microstrip line output terminal matching scheme of absorbing resistor, not only fundamentally eliminate the voltage reflection that impedance discontinuity causes, also can realize the monitoring of strobe pulse amplitude and waveform.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
See Fig. 1, a kind of microchannel plate travelling wave gating framing camera MCP microstrip line device, comprises the input end, MCP and the output terminal that connect successively, and output terminal comprises resistance absorption coupling passage parallel with one another and the monitoring channel for monitoring for oscillograph; Coupling passage adopts resistance in series to absorb coupling; The MCP microstrip line characteristic impedance of microstrip line device equals the resistance absorption coupling passage equiva lent impedance in parallel with monitoring channel.
MCP microstrip line output terminal is divided into two-way, and a road adopts resistance in series to absorb coupling, and another road exports for oscillograph monitoring, and specific implementation step is as follows:
1) time-domain reflectomer (TDR) is used to measure MCP microstrip line characteristic impedance Z
mCP.
2) printed circuit board (PCB) design feature impedance (Z0) is used to equal the PCB microstrip line of 50 ohm as output monitoring.
3) according to MCP microstrip line characteristic impedance Z
mCPmonitoring micro-strip line impedance Z is exported with PCB
0calculate output-parallel microstrip line characteristic impedance ZL, use the parallel connection that PCB design characteristic impedance is ZL to absorb microstrip line, absorption microstrip line serial connection R in parallel
lequal Z
labsorbing resistor.
Travelling wave gating framing camera MCP microstrip line is limited to the impact of micro belt line width and MCP dielectric thickness etc., its characteristic impedance is generally far below 50 ohm of normal impedances, in order to the efficient coupling and MCP that realize strobe pulse export pulse monitoring, often need to carry out corresponding impedance transformation.As shown in the figure, be framing image-converter tube MCP microstrip line and designing impedance matching schematic diagram.According to actual needs, MCP1 is generally coated with several independences, microstrip line parallel to each other, every bar microstrip line both as photocathode, simultaneously also as the transmission line of strobe pulse.Schematically draw four MCP microstrip lines 2,3,4,5 in figure, and carry out impedance matching explanation for MCP microstrip line 4.Strobe pulse enters from MCP microstrip line one end 41, transmits along MCP microstrip line 4, and exports from the other end.Output terminal impedance matching is formed by exporting monitoring microstrip line 42, absorption microstrip line 43 in parallel and series connection absorbing resistor 44.Export monitoring microstrip line 42, the microstrip line 43 that absorbs in parallel is designed by printing board PCB 6, absorbing resistor 44 can select surface mount packages resistor, and its one end absorbs microstrip line 43 with parallel connection and is connected in series, and the other end is connected with PCB stratum by via hole.
The characteristic impedance of MCP microstrip line 4 is Z
mCP, export monitoring microstrip line 42 characteristic impedance Z
0equal 50 ohm, absorption microstrip line 43 in parallel characteristic impedance is Z
l, owing to exporting monitoring microstrip line 42 and absorbing microstrip line 43 parallel connection and connect with MCP microstrip line 4 again and mate, so three microstrip line characteristic impedances meet relational expression: Z
mCP=(Z
l× Z
0)/(Z
l+ Z
0), the resistance R of absorbing resistor 44 of wherein connecting
lequal Z
l.
Claims (3)
1. a microchannel plate travelling wave gating framing camera MCP microstrip line device, comprises the input end, MCP and the output terminal that connect successively, it is characterized in that: described output terminal comprises resistance absorption coupling passage in parallel and monitoring channel; Described monitoring channel is used for oscillograph monitoring; Described resistance absorption coupling passage adopts resistance in series to absorb coupling; The MCP microstrip line characteristic impedance of described microstrip line device equals the resistance absorption coupling passage equiva lent impedance in parallel with monitoring channel.
2. microchannel plate travelling wave gating framing camera MCP microstrip line device according to claim 1, is characterized in that: the parallel connection that described resistance absorption coupling passage comprises series winding absorbs microstrip line and absorbing resistor; Described parallel connection absorbs microstrip line and is formed by PCB design; Described absorbing resistor (44) selects surface mount packages resistor, and its one end absorbs microstrip line with parallel connection and is connected in series, and the other end is connected with PCB stratum by via hole.
3. microchannel plate travelling wave gating framing camera MCP microstrip line device according to claim 1 and 2, it is characterized in that: described MCP is coated with some independences, microstrip line parallel to each other, every bar microstrip line both as photocathode, simultaneously also as the transmission line of strobe pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575585.5U CN204359940U (en) | 2014-09-30 | 2014-09-30 | A kind of microchannel plate travelling wave gating framing camera MCP microstrip line device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575585.5U CN204359940U (en) | 2014-09-30 | 2014-09-30 | A kind of microchannel plate travelling wave gating framing camera MCP microstrip line device |
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| Publication Number | Publication Date |
|---|---|
| CN204359940U true CN204359940U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420575585.5U Withdrawn - After Issue CN204359940U (en) | 2014-09-30 | 2014-09-30 | A kind of microchannel plate travelling wave gating framing camera MCP microstrip line device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267421A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Traveling-wave gated framing camera MCP microstrip line device and impedance matching method |
| CN104915497A (en) * | 2015-06-09 | 2015-09-16 | 哈尔滨工程大学 | Method for estimating distributed capacitance parameters between high-speed PCB microstrip lines |
-
2014
- 2014-09-30 CN CN201420575585.5U patent/CN204359940U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267421A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Traveling-wave gated framing camera MCP microstrip line device and impedance matching method |
| CN104915497A (en) * | 2015-06-09 | 2015-09-16 | 哈尔滨工程大学 | Method for estimating distributed capacitance parameters between high-speed PCB microstrip lines |
| CN104915497B (en) * | 2015-06-09 | 2018-07-24 | 哈尔滨工程大学 | The predictor method of distributed capacitance parameter between a kind of High-Speed PCB microstrip line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20170524 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20170524 |