CN103969676B - A kind of controllable type multichannel charger-reader - Google Patents
A kind of controllable type multichannel charger-reader Download PDFInfo
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- CN103969676B CN103969676B CN201410199336.5A CN201410199336A CN103969676B CN 103969676 B CN103969676 B CN 103969676B CN 201410199336 A CN201410199336 A CN 201410199336A CN 103969676 B CN103969676 B CN 103969676B
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Abstract
The present invention relates to the multichannel electric charge front end reading circuit technical field for beam monitoring, especially relate to a kind of controllable type multichannel charger-reader.It is characterized in speed-sensitive switch, the integrator of band drainage function, multiplexer, control logic circuit, difference output driving circuit and the data collecting card including being sequentially connected, it divides electric charge (electric current) signal of bar ionization chamber to read for beam monitoring, range is controlled, integration duration is controlled, working method (read continuously/interval read) is controlled, use that can be flexible and changeable；Every passage contains two-way (A and B) integrator, and they can improve signal processing efficiency with time-sharing work；Use multiplex electronics, it is achieved signal Serial output, can effectively reduce complexity and the manufacturing cost of Data collection and precessing system, improve the accuracy of heavy-ion cancer therapy system.This circuit precision height, good linearity, motility are strong, simple in construction.
Description
Technical field
The present invention relates to the multichannel electric charge front end reading circuit technical field for beam monitoring, especially
Relate to a kind of controllable type multichannel charger-reader.
Background technology
Along with the development of heavy-ion cancer therapy technology, in order to reach more excellent therapeutic effect, treatment
Terminal is more and more higher to the requirement of quality of beam.In heavy-ion cancer therapy device, the reality of line spatial distribution
Time monitoring to measure be one of key component in this device.The line of heavy-ion cancer therapy device is by treatment eventually
Point bar ionization chamber of end exports multichannel faint electric charge (electric current) signal, then by multichannel electric charge (electricity
Stream) reading circuit can realize the real-time monitoring of line spatial distribution.Under normal circumstances, terminal for cancer is used for
Electric charge (electric current) signal of point bar ionization chamber output of beam monitoring is less, and port number is more, uses existing
The real-time change-over circuit of current/voltage having technology can cause data volume very big, the real-time data transmission to rear class
Requirement is higher with processing, and so causes manufacturing cost fairly expensive, secondly environment noise interference to circuit
The biggest, affect the accuracy of beam monitoring.
Summary of the invention
It is an object of the invention to avoid the deficiencies in the prior art to provide a kind of controllable type multichannel electric charge to read
Go out device, thus effectively solve problem of the prior art.
For achieving the above object, the technical scheme that the present invention takes is: described a kind of controllable type multichannel
Charger-reader, the speed-sensitive switch being characterized in including being sequentially connected, the integrator of band drainage function,
Multiplexer, control logic circuit, difference output driving circuit and data collecting card, described high speed
Switch includes the 16 groups of speed-sensitive switches being connected with 16 tunnel input signals, and often group speed-sensitive switch is by phase arranged side by side
Two-way speed-sensitive switch S evenAiAnd SBi, two-way speed-sensitive switch SAiAnd SBiRespectively with integrator A and long-pending
Device B is divided to connect；The outfan of integrator A is connected to multiplexer A, the outfan of integrator B
It is connected to multiplexer B；The outfan of multiplexer A and multiplexer B is connected respectively to
Difference output driving circuit, the outfan of difference output driving circuit is connected to the analogue difference of data collecting card
Divide input；Data collecting card is connected with control logic circuit and carries out two-way communication, control logic circuit with
Speed-sensitive switch is connected.
The digital output end of described data collecting card sends external trigger signal to control logic circuit, control
Logic circuit sends and gathers clock signal with trigger collection signal to the digital input end of data collecting card；Institute
The control logic circuit stated controls multiplexer A by the control signal after light-coupled isolation and multichannel is multiple
With channel selecting and the switching of device B；Control logic circuit controls height by the control signal after light-coupled isolation
The disconnection of speed switch and Guan Bi.
16 road V of described integrator A outputAiSignal correspondence and 16 channel analog multiplexer A
16 analog input end S0-S15 connect, 16 channel analog multiplexer A are by controlling logic electricity
Road CPLD exports through light-coupled isolation Hou tetra-tunnel control signal CA0～CA3Control its switching, 16 passage moulds
Intend the voltage signal V of the outfan output serial of multiplexer AOUTA, VOUTADrive with difference output
Galvanic electricity road connects, the differential voltage signal of difference output driving device circuit output and the simulation of data collecting card
Differential input end AI0-1Connect；16 road V of integrator B outputBiSignal is corresponding many with 16 tunnels analogies
16 analog input end S0-S15 of path multiplexer B connect, 16 channel analog multiplexer B by
Control logic circuit CPLD exports through light-coupled isolation Hou tetra-tunnel control signal CB0～CB3Control it to cut
Change, the voltage signal V of the outfan output serial of 16 channel analog multiplexer BOUTB, VOUTB
It is connected with difference output driving device, the differential voltage signal of difference output driving device output and data collecting card
Analog differential input AI2-3Connect.
Described control logic circuit realizes the communication with data collecting card, and controls speed-sensitive switch SA/Bi
With the switch S that releases in integratorHA/BiBreak-make and the switching of multiplexer.
Digital output D0, D1, D2, D3 of described data collecting card is electric with control logic respectively
Four I/O mouths of road CPLD connect, and corresponding transmission channel B work triggers signal Trig-Bin, A lead to
Road work triggers signal Trig-Ain, data acquisition enable trigger signal DAQ-trig, data acquisition clock
Signal DAQ-sclk.
The integrator of described band drainage function is made up of amplifier OP, adjustable integrating capacitor and switch of releasing,
The outfan of speed-sensitive switch is connected with the inverting input of amplifier OP, and the normal phase input end of amplifier OP connects
Ground, the inverting input of amplifier OP is connected with adjustable integrating capacitor, and the other end of electric capacity is connected to amplifier
The outfan of OP, a switch of releasing in parallel in adjustable integrating capacitor, the outfan output of amplifier OP
Voltage signal；Described speed-sensitive switch SAiOutfan be connected with the inverting input of amplifier OP, fortune
Put the positive input end grounding of OP, the inverting input of amplifier OP and adjustable integrating capacitor CAiConnect,
Electric capacity CAiThe other end be connected to the outfan of amplifier OP, adjustable integrating capacitor CAiLet out for upper one in parallel
Decontrol and close SHAi, the outfan output voltage signal V of amplifier OPAi；Speed-sensitive switch SBiOutfan with
The inverting input of amplifier OP connects, the positive input end grounding of amplifier OP, amplifier OP anti-phase
Input and adjustable integrating capacitor CBiConnect, electric capacity CBiThe other end be connected to the outfan of amplifier OP,
Adjustable integrating capacitor CBiThe upper switch S that releases in parallelHBi, the outfan output voltage letter of amplifier OP
Number VBi；Release switch SHAiWith the switch S that releasesHBiBy CPLD output control letter after light-coupled isolation
Number control its whether release, release switch SHAiWith the switch S that releasesHBiMovement time be respectively less than 20ns.
Four tunnel control signals CTRL-A of described control logic circuit CPLD output simulation multiplexer A
To optical coupling isolator, four tunnel control signals CTRL-B of output simulation multiplexer B to optical coupling isolator,
Export No. 16 speed-sensitive switch SAiControl signal to optical coupling isolator, export No. 16 speed-sensitive switch SBi
Control signal to optical coupling isolator, export 16 tunnels release switch SHAiControl signal to light-coupled isolation
Device, export 16 tunnels release switch SHBiControl signal to optical coupling isolator.Due to all of SAiSignal
It is to synchronize, it is also possible to use fan-out circuit to obtain the S of corresponding 16 passagesAiSignal controls logic to reduce
The use of circuit CPLD device I/O mouth, this kind of method is applied equally to obtain all of SBi、SHAi
And SHBiSignal.
The invention has the beneficial effects as follows: described a kind of controllable type multichannel charger-reader, it is used for
Beam monitoring divides electric charge (electric current) signal of bar ionization chamber to read, and range is controlled, and integration duration is controlled,
Working method (read continuously/interval read) is controlled, use that can be flexible and changeable；Every passage contains
Two-way (A and B) integrator, they can improve signal processing efficiency with time-sharing work；Employing is many
Road multiplex circuit, it is achieved signal Serial output, can effectively reduce the complexity of Data collection and precessing system
Degree and manufacturing cost, improve the accuracy of heavy-ion cancer therapy system.This circuit precision height, good linearity,
Motility is strong, simple in construction.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the circuit theory schematic diagram of the present invention；
Fig. 3 is working timing figure of the present invention.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining this
Invention, is not intended to limit the scope of the present invention.
As shown in Figures 1 to 3, described a kind of controllable type multichannel charger-reader, feature is to include
The speed-sensitive switch that is sequentially connected, the integrator of band drainage function, multiplexer, control logic circuit,
Difference output driving circuit and data collecting card, described speed-sensitive switch includes and 16 tunnel input signal phases
16 groups of speed-sensitive switches even, often group speed-sensitive switch is by the two-way speed-sensitive switch S being connected side by sideAiAnd SBi,
Two-way speed-sensitive switch SAiAnd SBiIt is connected with integrator A and integrator B respectively；The output of integrator A
End is connected to multiplexer A, and the outfan of integrator B is connected to multiplexer B；Multiplexing
The outfan of device A and multiplexer B is connected respectively to difference output driving circuit, and difference output drives
The outfan on galvanic electricity road is connected to the analog differential input of data collecting card；Data collecting card is patrolled with control
Collecting circuit connection and carry out two-way communication, control logic circuit is connected with speed-sensitive switch.
The digital output end of described data collecting card sends external trigger signal to control logic circuit, control
Logic circuit sends and gathers clock signal with trigger collection signal to the digital input end of data collecting card；Institute
The control logic circuit stated controls multiplexer A by the control signal after light-coupled isolation and multichannel is multiple
With channel selecting and the switching of device B；Control logic circuit controls height by the control signal after light-coupled isolation
The disconnection of speed switch and Guan Bi.
16 road V of described integrator A outputAiSignal correspondence and 16 channel analog multiplexer A
16 analog input end S0-S15 connect, 16 channel analog multiplexer A are by controlling logic electricity
Road CPLD exports through light-coupled isolation Hou tetra-tunnel control signal CA0～CA3Control its switching, 16 passage moulds
Intend the voltage signal V of the outfan output serial of multiplexer AOUTA, VOUTADrive with difference output
Galvanic electricity road connects, the differential voltage signal of difference output driving device circuit output and the simulation of data collecting card
Differential input end AI0-1Connect；16 road V of integrator B outputBiSignal is corresponding many with 16 tunnels analogies
16 analog input end S0-S15 of path multiplexer B connect, 16 channel analog multiplexer B by
Control logic circuit CPLD exports through light-coupled isolation Hou tetra-tunnel control signal CB0～CB3Control it to cut
Change, the voltage signal V of the outfan output serial of 16 channel analog multiplexer BOUTB, VOUTB
It is connected with difference output driving device, the differential voltage signal of difference output driving device output and data collecting card
Analog differential input AI2-3Connect.
Described control logic circuit realizes the communication with data collecting card, and controls speed-sensitive switch SA/Bi
With the switch S that releases in integratorHA/BiBreak-make and the switching of multiplexer.
Digital output D0, D1, D2, D3 of described data collecting card is electric with control logic respectively
Four I/O mouths of road CPLD connect, and corresponding transmission channel B work triggers signal Trig-Bin, A lead to
Road work triggers signal Trig-Ain, data acquisition enable trigger signal DAQ-trig, data acquisition clock
Signal DAQ-sclk.
The integrator of described band drainage function is made up of amplifier OP, adjustable integrating capacitor and switch of releasing,
The outfan of speed-sensitive switch is connected with the inverting input of amplifier OP, and the normal phase input end of amplifier OP connects
Ground, the inverting input of amplifier OP is connected with adjustable integrating capacitor, and the other end of electric capacity is connected to amplifier
The outfan of OP, a switch of releasing in parallel in adjustable integrating capacitor, the outfan output of amplifier OP
Voltage signal；Described speed-sensitive switch SAiOutfan be connected with the inverting input of amplifier OP, fortune
Put the positive input end grounding of OP, the inverting input of amplifier OP and adjustable integrating capacitor CAiConnect,
Electric capacity CAiThe other end be connected to the outfan of amplifier OP, adjustable integrating capacitor CAiLet out for upper one in parallel
Decontrol and close SHAi, the outfan output voltage signal V of amplifier OPAi；Speed-sensitive switch SBiOutfan with
The inverting input of amplifier OP connects, the positive input end grounding of amplifier OP, amplifier OP anti-phase
Input and adjustable integrating capacitor CBiConnect, electric capacity CBiThe other end be connected to the outfan of amplifier OP,
Adjustable integrating capacitor CBiThe upper switch S that releases in parallelHBi, the outfan output voltage letter of amplifier OP
Number VBi；Release switch SHAiWith the switch S that releasesHBiBy CPLD output control letter after light-coupled isolation
Number control its whether release, release switch SHAiWith the switch S that releasesHBiMovement time be respectively less than 20ns.
Four tunnel control signals CTRL-A of described control logic circuit CPLD output simulation multiplexer A
To optical coupling isolator, four tunnel control signals CTRL-B of output simulation multiplexer B to optical coupling isolator,
Export No. 16 speed-sensitive switch SAiControl signal to optical coupling isolator, export No. 16 speed-sensitive switch SBi
Control signal to optical coupling isolator, export 16 tunnels release switch SHAiControl signal to light-coupled isolation
Device, export 16 tunnels release switch SHBiControl signal to optical coupling isolator.Due to all of SAiSignal
It is to synchronize, it is also possible to use fan-out circuit to obtain the S of corresponding 16 passagesAiSignal controls logic to reduce
The use of circuit CPLD device I/O mouth, this kind of method is applied equally to obtain all of SBi、SHAi
And SHBiSignal.
Described a kind of controllable type multichannel charger-reader, during its work, data collecting card output A
Series of channel work triggers signal Trig-AinSignal Trig-B is triggered with the work of B series of channelin, when
Trig-AinFor high level and Trig-BinDuring for low level, represent the electric charge (electric current) of ensuing time period
Signal will be read by A series of channel, 16 speed-sensitive switch S of A series of channelAiGuan Bi, 16 are amassed
Divide the switch S that releases in device AHAiDisconnect, 16 speed-sensitive switch S of B series of channelBiDisconnect, integration
Device A starts working, by electric charge (electric current) in integrating capacitor CAiOn be converted into voltage signal.Next
It is possible that three kinds of states, the first state is Trig-AinFor high level and Trig-BinBecome high electricity
Flat, the second state is Trig-AinBecome low level and Trig-BinWhen being also low level, both states
During generation, represent that electric charge (electric current) signal of ensuing time period need not read, now A series
16 speed-sensitive switch S of passageAiDisconnect, the switch S that releases in 16 integrator AHAiContinue to disconnect,
16 speed-sensitive switch S of B series of channelBiGuan Bi, the switch S that releases in 16 integrator BHBiContinue
Continuous Guan Bi, data acquisition enables triggering signal DAQ-trig and becomes high level control logic circuit CPLD
The corresponding 16 road simulation multiplexers that control switch, and export 16 serial voltage signals, then through difference output
Driver 16 serial differential voltage signals of output, the DAQ-sclk of data acquisition clock signal simultaneously sends
16 acquisition pulse signal correspondences gather 16 differential voltage signals in A series of channel, when the completeest
Become the collection of A series of channel data, then data acquisition enables and triggers signal DAQ-trig and data acquisition
Clock signal DAQ-sclk all becomes low level, 16 speed-sensitive switch S of A series of channelAiDisconnect,
The switch S that releases in 16 integrator AHAiGuan Bi；The third state is Trig-AinBecome low level and
Trig-BinWhen becoming high level, represent that electric charge (electric current) signal of ensuing time period will be by B system
Row passage reads, now 16 speed-sensitive switch S of A series of channelAiDisconnect, in 16 integrator A
Release switch SHAiDisconnect, 16 speed-sensitive switch S of B series of channelBiGuan Bi, 16 integrator B
In release switch SHBiDisconnecting, integrator B starts working, by electric charge (electric current) in integrating capacitor
CBiOn be converted into voltage signal, carry out simultaneously described in the first situation and the second situation A series
The collection of channel data.When the third state occurring again in the first state and the second state are carried out,
The data acquisition of A series of channel proceeds according to original state state, and electric charge (electric current) signal starts by B system
Row passage reads.The above achieves A series of channel and reads into the converted of B series of channel reading
Journey, and B series of channel reads and is transformed into the process of A series of channel reading with similarly as described above.A
Work that series of channel is gone round and begun again according to this workflow with B series of channel is it is achieved thereby that multichannel
The reading of electric charge (electric current) signal.
Described a kind of controllable type multichannel charger-reader, can reading multichannel electric charge free of discontinuities
(electric current) signal, it is also possible to interval reads multichannel electric charge (electric current) signal；Can be long-pending by regulation
The integrating capacitor size dividing device realizes the reading that input range is 30fC～50uC positive and negative charge signal；Integration
Duration is by external control, but is limited to data acquisition time, if selecting each passage 40MS/s to sample
The data collecting card of rate, then integration duration must not be less than 500ns, and the most accessible example rate is up to
2*106counts/s；Output signal range is-5V～+5V；Can be any by this 16 road element circuit
Integral multiple combination realizes multichannel electric charge (electric current) and reads；Circuit working stability, capacity of resisting disturbance is strong,
Achieve multichannel, the reading of wide dynamic range positive and negative charge (electric current).This invention can also extensively be answered
Front-end processing for other electric charge (electric current) signal of nuclear physics experiment and accelerator system.Can be omnidistance
Unremitting reading beam examines multichannel positive/negative electric charge (electric current) signal of monitoring point bar ionization chamber output, and
Have Larger Dynamic scope, good linear, intelligent and can the feature such as flexible operating, thus be heavy ion
Line distributed intelligence in for cancer provides simple and reliable monitoring method and means.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (7)
1. a controllable type multichannel charger-reader, it is characterized in that speed-sensitive switch, the integrator of band drainage function, multiplexer, control logic circuit, difference output driving circuit and the data collecting card including being sequentially connected, described speed-sensitive switch includes the 16 groups of speed-sensitive switches being connected with 16 tunnel input signals, and often group speed-sensitive switch is by the two-way speed-sensitive switch S being connected side by sideAiAnd SBiComposition, two-way speed-sensitive switch SAiAnd SBiIt is connected with integrator A and integrator B respectively；The outfan of integrator A is connected to multiplexer A, and the outfan of integrator B is connected to multiplexer B；The outfan of multiplexer A and multiplexer B is connected respectively to difference output driving circuit, and the outfan of difference output driving circuit is connected to the analog differential input of data collecting card；Data collecting card is connected with control logic circuit CPLD and carries out two-way communication, and control logic circuit CPLD is connected with speed-sensitive switch.
A kind of controllable type multichannel charger-reader the most according to claim 1, it is characterized in that: the digital output end of described data collecting card sends external trigger signal and sends collection clock signal with trigger collection signal to the digital input end of data collecting card to control logic circuit CPLD, control logic circuit CPLD；Described control logic circuit CPLD controls multiplexer A and the channel selecting of multiplexer B and switching by the control signal after light-coupled isolation；Control logic circuit CPLD controls disconnection and the Guan Bi of speed-sensitive switch by the control signal after light-coupled isolation.
A kind of controllable type multichannel charger-reader the most according to claim 1, it is characterised in that: 16 road V of described integrator A outputAiSignal correspondence is connected with 16 analog input end S0-S15 of 16 channel analog multiplexer A, and 16 channel analog multiplexer A are exported through light-coupled isolation Hou tetra-tunnel control signal C by control logic circuit CPLDA0~CA3Control its switching, the voltage signal V of the outfan output serial of 16 channel analog multiplexer AOUTA, VOUTAIt is connected with difference output driving circuit, the differential voltage signal of difference output driving device circuit output and the analog differential input AI of data collecting card0-1Connect；16 road V of integrator B outputBiSignal correspondence is connected with 16 analog input end S0-S15 of 16 channel analog multiplexer B, and 16 channel analog multiplexer B are exported through light-coupled isolation Hou tetra-tunnel control signal C by control logic circuit CPLDB0~CB3Control its switching, the voltage signal V of the outfan output serial of 16 channel analog multiplexer BOUTB, VOUTBIt is connected with difference output driving device, the differential voltage signal of difference output driving device output and the analog differential input AI of data collecting card2-3Connect.
A kind of controllable type multichannel charger-reader the most according to claim 1 and 2, it is characterised in that: described control logic circuit CPLD realizes the communication with data collecting card, and controls speed-sensitive switch SA/BiWith the switch S that releases in integratorHA/BiBreak-make and the switching of multiplexer.
5. according to a kind of controllable type multichannel charger-reader described in claim 1 or 2 or 3, it is characterized in that: digital output D0, D1, D2, D3 of described data collecting card is connected with four I/O mouths of control logic circuit CPLD respectively, corresponding transmission channel B work triggers signal Trig-Bin, A channel work trigger signal Trig-Ain, data acquisition enable trigger signal DAQ-trig, data acquisition clock signal DAQ-sclk.
A kind of controllable type multichannel charger-reader the most according to claim 1, it is characterized in that: the integrator of described band drainage function is made up of amplifier OP, adjustable integrating capacitor and switch of releasing, the outfan of speed-sensitive switch is connected with the inverting input of amplifier OP, the positive input end grounding of amplifier OP, the inverting input of amplifier OP is connected with adjustable integrating capacitor, the other end of electric capacity is connected to the outfan of amplifier OP, a switch of releasing in parallel, the outfan output voltage signal of amplifier OP in adjustable integrating capacitor；Described speed-sensitive switch SAiOutfan be connected with the inverting input of amplifier OP, the positive input end grounding of amplifier OP, the inverting input of amplifier OP and adjustable integrating capacitor CAiConnect, electric capacity CAiThe other end be connected to the outfan of amplifier OP, adjustable integrating capacitor CAiThe upper switch S that releases in parallelHAi, the outfan output voltage signal V of amplifier OPAi；Speed-sensitive switch SBiOutfan be connected with the inverting input of amplifier OP, the positive input end grounding of amplifier OP, the inverting input of amplifier OP and adjustable integrating capacitor CBiConnect, electric capacity CBiThe other end be connected to the outfan of amplifier OP, adjustable integrating capacitor CBiThe upper switch S that releases in parallelHBi, the outfan output voltage signal V of amplifier OPBi；Release switch SHAiWith the switch S that releasesHBiBeing controlled whether it releases by control logic circuit CPLD output control signal after light-coupled isolation, release switch SHAiWith the switch S that releasesHBiMovement time be respectively less than 20ns.
A kind of controllable type multichannel charger-reader the most according to claim 5, it is characterized in that: four tunnel control signals CTRL-A of described control logic circuit CPLD output simulation multiplexer A are to optical coupling isolator, four tunnel control signals CTRL-B of output simulation multiplexer B, to optical coupling isolator, export No. 16 speed-sensitive switch SAiControl signal to optical coupling isolator, export No. 16 speed-sensitive switch SBiControl signal to optical coupling isolator, export 16 tunnels release switch SHAiControl signal to optical coupling isolator, export 16 tunnels release switch SHBiControl signal to optical coupling isolator；Due to all of SAiSignal is to synchronize, or uses fan-out circuit to obtain the S of corresponding 16 passagesAiSignal is to reduce the use of control logic circuit CPLD device I/O mouth, and this kind of method is applied equally to obtain all of SBi、SHAiAnd SHBiSignal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199336.5A CN103969676B (en) | 2014-05-11 | A kind of controllable type multichannel charger-reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199336.5A CN103969676B (en) | 2014-05-11 | A kind of controllable type multichannel charger-reader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103969676A CN103969676A (en) | 2014-08-06 |
| CN103969676B true CN103969676B (en) | 2016-11-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101533099A (en) * | 2009-03-22 | 2009-09-16 | 中国科学院近代物理研究所 | Charge frequency converter |
| TW201340593A (en) * | 2012-03-27 | 2013-10-01 | Academia Sinica | Accelerator beam speed monitor and its read out device |
| CN203825205U (en) * | 2014-05-11 | 2014-09-10 | 中国科学院近代物理研究所 | Controllable multichannel charge reading device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533099A (en) * | 2009-03-22 | 2009-09-16 | 中国科学院近代物理研究所 | Charge frequency converter |
| TW201340593A (en) * | 2012-03-27 | 2013-10-01 | Academia Sinica | Accelerator beam speed monitor and its read out device |
| CN203825205U (en) * | 2014-05-11 | 2014-09-10 | 中国科学院近代物理研究所 | Controllable multichannel charge reading device |
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| Title |
|---|
| A newmulti-strip ionization chamber used as online beam monitor for heavy ion therapy;Zhiguo Xu等;《NuclearInstrumentsandMethodsin》;20131121;第895-899页 * |
| 一种束流强度监测电路设计;苏弘等;《核电子学与探测技术》;20090930;第1051-1054页 * |
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