CN108169786A - For the strong feedback monitoring system and method for superconducting cyclotron ion beam current stream - Google Patents
For the strong feedback monitoring system and method for superconducting cyclotron ion beam current stream Download PDFInfo
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- CN108169786A CN108169786A CN201711321888.9A CN201711321888A CN108169786A CN 108169786 A CN108169786 A CN 108169786A CN 201711321888 A CN201711321888 A CN 201711321888A CN 108169786 A CN108169786 A CN 108169786A
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- ion
- accelerator
- coaxial cable
- electronic control
- beam current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention discloses a kind of feedback monitoring system and method strong for superconducting cyclotron ion beam current stream, including host computer, FPGA electronic control units, filament supply, arc power, ion source filament, accelerator faraday bucket, transit, na level amplifier；Filament supply heat filament generates electronics, electronics and hydrogen collision generate ion, ion is drawn by high frequency voltage, it beats on faraday's bucket in deflecting plates exit is located at, faraday's bucket is connected by coaxial cable on na level current amplifier, control unit is controlled electronically by FPGA again to acquire, uploads to host computer, monitors ion beam current stream intensity values.The present invention is using jamproof coaxial cable and simple and practical faraday bucket, the FPGA electronic units that quickly handle, and the Beam Current intensity values of effective feedback monitoring treatment patient increase treatment patient system's stability, realize treatment patient's plan.
Description
Technical field
The invention belongs to superconducting cyclotron technical fields, and in particular, to one kind for superconducting cyclotron from
The feedback monitoring system and method for sub- Bunch current.
Background technology
With the rapid development of nuclear medicine, accelerator has been widely used in positron emission tomography (PET)
Technology, Isotope production, proton therapeutic.Wherein, proton therapeutic is considered as " carcinogenic sharp weapon ".This is that current medical field is most top
A kind of radiotherapy technology.Proton therapeutic is a kind of radiotherapy more more advanced than Traditional x-ray radiotherapy, and because its treatment is accurate, pair is made
Favored with small and the features such as high dose targeting irradiation can be carried out by more and more Medical Technologist and patient.1931, generation
First cyclotron is born in boundary, opens the new era of artificial production radioactive element.With high-energy physics and core object
The development of reason technology, other various types of accelerators occur in succession, such as classical cyclotron, synchrocyclotron and
Isochronous cyclotron.
But pervious accelerator is all bigger, accounts for much room, and of high cost, Bunch current precision is low, control system
Unite unstable etc., since accelerator input medical treatment, there is multiple malpractice.Therefore it is badly in need of developing a kind of Bunch current
Precision is high, and control system is stable, compact superconducting cyclotron.
Invention content
For the strong control system of accelerator ion beam current stream existing in above-mentioned background technology there are the defects of, the present invention provide
For the strong feedback monitoring system and method for superconducting cyclotron ion beam current stream, this method is simple and practical, can be effective
The line value that the Beam Current intensity values of monitoring treatment patient and output need.
The purpose of the present invention can be achieved through the following technical solutions：
For the strong feedback monitoring system of superconducting cyclotron ion beam current stream, it is single which includes FPGA electronic controls
Member, ion source filament, accelerator faraday bucket；
The FPGA electronic control units exchange signal by coaxial cable with host computer；
The output terminal of the FPGA electronic control units passes through the coaxial cable input with filament supply and arc power respectively
End connection；
The output terminal of the filament supply and arc power is connected by the input terminal of coaxial cable and ion source filament；
The output terminal of the ion source filament is connect with the input terminal of accelerator faraday bucket；
Accelerator faraday bucket is located at deflecting plates exit, the first output terminal of the accelerator faraday bucket with it is defeated
The input terminal connection of transport line, the second output terminal of the accelerator faraday bucket pass through coaxial cable and na level current amplifier
Input terminal connection, wherein, the transit is set to accelerator exit；
The output terminal of the na level current amplifier is connected by the input terminal of coaxial cable and FPGA electronic control units
It connects.
Further, the host computer is used to turn the ion source Bunch current set in the form of Bunch current percentage
It changes electric current into, and electric current is transferred to FPGA electronic control units by coaxial cable.
Further, the host computer also connects FPGA electronic control units by Ethernet, in coaxial cable transmission
Pass through Ethernet configured transmission simultaneously.
Further, the accelerator faraday bucket is taper, and bung hole diameter is less than bucket bottom diameter.
Further, the FPGA electronic control units convert electric current after the electric current that host computer transmits is received
Into Digital Signal Processing and storage；
The FPGA electronic control units are additionally operable to convert digital signals into after electric current and be transmitted respectively by coaxial cable
To filament supply and arc power, and arc power voltage and filament supply electric current are controlled respectively.
Further, the filament supply and arc power are used to heat filament and generate electronics, and by being collided with hydrogen
Generate ion.
Further, the ion source filament is used for the ion drawn high frequency voltage to faraday's bucket and generated.
Further, the accelerator faraday bucket is used to for energetic ion to be delivered to accelerator and na level electric current respectively
Amplifier.
Further, the na level current amplifier is used to ion beam current signal transmission to FPGA being controlled electronically single
Member.
For the strong feedback monitoring method of superconducting cyclotron ion beam current stream, include the following steps：
(1) filament supply, arc power heat filament generate electronics, and electronics and hydrogen collision generate ion；
(2) ion is drawn by the high frequency voltage inside superconducting accelerator, is beaten in the accelerator process for being located at deflecting plates exit
It draws on the barrel, accelerator faraday bucket is collected energetic ion；
(3) energetic ion of collection is delivered to na level current amplifier by accelerator faraday bucket by coaxial cable；
(4) ion is transmitted to FPGA electronic control units by na level current amplifier by coaxial cable again, and ion leads to
The acquisition of FPGA electronic control units is crossed, uploads to host computer, host computer monitoring ion beam current stream intensity values.
Beneficial effects of the present invention：
The present invention uses jamproof coaxial cable, can effectively solve the electromagnetic interference problem under accelerator working environment；
The present invention can improve high energy electron collection efficiency using simple and practical taper faraday bucket；The present invention takes quick processing
FPGA electronic units, it can be achieved that fast real-time monitoring record；The feedback monitoring of the invention effective Beam Current for the treatment of patient
Intensity values increase treatment patient system's stability, when preparing before treatment patient, can export the line of needs, realize treatment disease
People plans.
Description of the drawings
In order to facilitate the understanding of those skilled in the art, the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is a kind of structural representation of the strong device of medical superconducting cyclotron ion beam current stream of feedback monitoring of the present invention
Figure；
Fig. 2 is the relational graph of line value percentage switching current value in the embodiment of the present invention；
Fig. 3 is the relational graph of line and arc current in the embodiment of the present invention；
Fig. 4 is faraday's bucket schematic diagram of the present invention；
Fig. 5 is the coaxial cable magnetic distribution figure of the present invention.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
It is only part of the embodiment of the present invention to apply example, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
All other embodiment that logical technical staff is obtained without creative efforts belongs to what the present invention protected
Range.
For the strong feedback monitoring system of superconducting cyclotron ion beam current stream, the medical superconducting cyclotron
Including ion source and accelerating cavity, ion source includes filament, arc power, filament supply, hydrogen, and accelerating cavity includes field system, height
Display system, center, vacuum system, center are equipped with center deflecting plates, symmetrical radio frequency D boxes are equipped with around center；Such as
Shown in Fig. 1, which includes FPGA electronic control units, ion source filament, accelerator faraday bucket, FPGA electronic control units
It is connected by coaxial cable with host computer, the output terminal of FPGA electronic control units connects filament supply, arc by coaxial cable
The input terminal of power supply, filament supply, arc power output terminal by the input terminal of coaxial cable and ion source filament connect, from
The output terminal of source filaments is connect with the input terminal of accelerator faraday bucket, and the first output terminal of accelerator faraday bucket is with transporting
The input terminal connection of line, the second output terminal of faraday's bucket are connected by the input terminal of coaxial cable and na level current amplifier
It connects, the output terminal of na level current amplifier is connect by coaxial cable with the input terminal of FPGA electronic control units；
Host computer is connected with FPGA electronic control units by coaxial cable, and host computer is by the ion source Bunch current of setting
Electric current is converted into the form of Bunch current percentage, and electric current is transferred to FPGA electronic control units by coaxial cable；
Host computer also connects FPGA electronic control units by Ethernet, is transmitted and joined by Ethernet while coaxial cable transmits
Number；
The output terminal of FPGA electronic control units connects the input terminal of filament supply, arc power, FPGA by coaxial cable
Electronic control unit converts the current to Digital Signal Processing and storage after the electric current that host computer transmits is received, then will
Digital signal is converted into electric current, and filament supply and arc power are respectively transmitted to by coaxial cable, controls arc power voltage respectively
With the electric current of filament supply；FPGA electronic control units are Microsecond grade processing units, it can be achieved that fast real-time monitoring records；
Filament supply, arc power are connect with ion source filament, and filament supply, arc power heat filament generate electronics, electricity
Son and hydrogen collision generate ion；
Ion source filament is connect with accelerator faraday bucket, and the ion that ion source filament generates is drawn by high frequency voltage,
It beats in accelerator faraday bucket；Accelerator faraday bucket is located at deflecting plates exit, and accelerator faraday bucket bung hole diameter is less than
Bottom of the barrel diameter is taper, as shown in figure 4, pyramidal structure can improve high energy electron collection efficiency；
First output terminal of accelerator faraday bucket is connect with transit, the energetic ion that accelerator faraday bucket is collected into
A part is delivered to outside accelerator through supply line and is tested；Transit is arranged on accelerator exit；
The second output terminal of accelerator faraday bucket is connect with the input terminal of na level current amplifier, accelerator faraday
Energetic ion another part that bucket is collected into is delivered to progress ion beam current letter on na level current amplifier by coaxial cable
Number amplification；
The output terminal of na level current amplifier is connect with the input terminal of FPGA electronic control units, na level Current amplifier
Ion beam current signal transmission to FPGA electronic control units, FPGA electronic control units are uploaded to by device after acquiring ion beam current
Position machine, monitors ion beam current stream intensity values；
For the strong feedback monitoring method of superconducting cyclotron ion beam current stream, include the following steps：
(1) filament supply, arc power heat filament generate electronics, and electronics and hydrogen collision generate ion；
(2) ion is drawn by the high frequency voltage inside superconducting accelerator, is beaten in the accelerator process for being located at deflecting plates exit
It draws on the barrel, accelerator faraday bucket is collected energetic ion；
(3) energetic ion of collection is delivered to na level current amplifier by accelerator faraday bucket by coaxial cable；
(4) ion is transmitted to FPGA electronic control units by na level current amplifier by coaxial cable again, and ion leads to
The acquisition of FPGA electronic control units is crossed, uploads to host computer, host computer monitoring ion beam current stream intensity values.
Embodiment
By taking SC200 superconduction bevatrons as an example, introduce a kind of for medical superconducting cyclotron Bunch current
The device of feedback monitoring.The cyclotron, ion source Bunch current are set using treating control system master controller
Determine Bunch current size, and in the form of Bunch current percentage, be converted into electric current, FPGA electronics is transferred to by coaxial cable
Control unit is converted into Digital Signal Processing and storage, then convert digital signals into electric current in FPGA electronic control units, leads to
Cable transmission is crossed to arc power, arc power voltage is controlled, while treat control system and optical fiber configured transmission is turned by Ethernet, controls
The electric current of filament supply processed, arc voltage and heater current are added on ion source filament, control Bunch current size.Specially physics
Teacher determines treatment plan according to patient CT and document data base, determines maximum beam stream intensity values in therapeutic process, and 300nA such as schemes
1；Know maximum beam, be converted into the relationship of electric current with percents in treatment control system master controller.300nA is corresponded to
20mA, such as Fig. 2；Analog quantity 20mA is transmitted through the cable to FPGA electronic control units, inside FPGA electronic control units with
Digital quantity formal layout and storage, output current analog quantity to arc power.Arc power is added on filament, while filament supply is added in
On filament, line, such as Fig. 1 are exported；Line and arc current relationship, 300nA correspond to 400mA, such as Fig. 3；Using faraday's bucket, such as scheme
4, coaxial cable, such as Fig. 5；FPGA electronic control units and host computer, in real time record monitoring.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably explain the present invention
Principle and practical application, so as to which skilled artisan be enable to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its four corner and equivalent.
Claims (10)
1. for the strong feedback monitoring system of superconducting cyclotron ion beam current stream, which is characterized in that the system includes FPGA
Electronic control unit, ion source filament, accelerator faraday bucket；
The FPGA electronic control units exchange signal by coaxial cable with host computer；
The output terminal of the FPGA electronic control units is connected by coaxial cable with the input terminal of filament supply and arc power respectively
It connects；
The output terminal of the filament supply and arc power is connected by the input terminal of coaxial cable and ion source filament；
The output terminal of the ion source filament is connect with the input terminal of accelerator faraday bucket；
The accelerator faraday bucket is located at deflecting plates exit, the first output terminal and transit of the accelerator faraday bucket
Input terminal connection, the second output terminal of accelerator faraday bucket is defeated by coaxial cable and na level current amplifier
Enter end connection, wherein, the transit is set to accelerator exit；
The output terminal of the na level current amplifier is connect by coaxial cable with the input terminal of FPGA electronic control units.
2. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the host computer is used to the ion source Bunch current of setting being converted into electric current in the form of Bunch current percentage, and
Electric current is transferred to FPGA electronic control units by coaxial cable.
3. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the host computer also connects FPGA electronic control units by Ethernet, passes through ether while coaxial cable transmits
Net configured transmission.
4. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is that the accelerator faraday bucket is taper, bung hole diameter is less than bucket bottom diameter.
5. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the FPGA electronic control units are converted the current to after the electric current that host computer transmits is received at digital signal
Reason and storage；
The FPGA electronic control units are additionally operable to convert digital signals into after electric current is respectively transmitted to lamp by coaxial cable
Silk power supply and arc power, and arc power voltage and filament supply electric current are controlled respectively.
6. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the filament supply and arc power are used to heat filament and generate electronics, and generate ion by being collided with hydrogen.
7. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the ion source filament is used for the ion drawn high frequency voltage to accelerator faraday bucket and generated.
8. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the accelerator faraday bucket is used to for energetic ion to be delivered to accelerator and na level current amplifier respectively.
9. the feedback monitoring system strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, the na level current amplifier is used for ion beam current signal transmission to FPGA electronic control units.
10. the feedback monitoring method strong for superconducting cyclotron ion beam current stream according to claim 1, feature
It is, includes the following steps：
(1) filament supply, arc power heat filament generate electronics, and electronics and hydrogen collision generate ion；
(2) ion is drawn by the high frequency voltage inside superconducting accelerator, is beaten on faraday's bucket in deflecting plates exit is located at, is added
Fast device faraday bucket is collected energetic ion；
(3) method accelerator draws the barrel the energetic ion of collection is delivered to na level current amplifier by coaxial cable；
(4) ion is transmitted to FPGA electronic control units by na level current amplifier by coaxial cable again, and ion passes through
FPGA electronic control units acquire, and upload to host computer, host computer monitoring ion beam current stream intensity values.
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| CN201711321888.9A CN108169786B (en) | 2017-12-12 | 2017-12-12 | Feedback monitoring system and method for ion beam current intensity of superconducting cyclotron |
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| CN201711321888.9A CN108169786B (en) | 2017-12-12 | 2017-12-12 | Feedback monitoring system and method for ion beam current intensity of superconducting cyclotron |
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| CN108169786B CN108169786B (en) | 2020-02-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505700A (en) * | 2020-05-21 | 2020-08-07 | 山东蓝孚高能物理技术股份有限公司 | Electron accelerator beam intensity real-time monitoring device |
| CN113050150A (en) * | 2021-03-15 | 2021-06-29 | 合肥中科离子医学技术装备有限公司 | Anti-interference current target for cyclotron |
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| CN204314472U (en) * | 2014-09-13 | 2015-05-06 | 中国科学院近代物理研究所 | High energy high-current accelerator Faraday cylinder |
| CN105676261A (en) * | 2016-01-13 | 2016-06-15 | 中国科学院上海应用物理研究所 | System and method for measuring beam flow intensity of particle accelerator |
| CN107360662A (en) * | 2017-07-12 | 2017-11-17 | 合肥中科离子医学技术装备有限公司 | A kind of method for improving medical superconducting cyclotron Bunch current precision controlling |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101470208A (en) * | 2007-12-28 | 2009-07-01 | 中国航天科技集团公司第五研究院第五一〇研究所 | Measuring system for nA/pA electronic beam current of impulse electron accelerator |
| CN103018606A (en) * | 2012-12-13 | 2013-04-03 | 江苏达胜加速器制造有限公司 | Electronic gun tester for high voltage electron accelerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505700A (en) * | 2020-05-21 | 2020-08-07 | 山东蓝孚高能物理技术股份有限公司 | Electron accelerator beam intensity real-time monitoring device |
| CN113050150A (en) * | 2021-03-15 | 2021-06-29 | 合肥中科离子医学技术装备有限公司 | Anti-interference current target for cyclotron |
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