CN106231777B - A kind of signal source of high stability of superconducting cyclotron - Google Patents
A kind of signal source of high stability of superconducting cyclotron Download PDFInfo
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- CN106231777B CN106231777B CN201610616930.9A CN201610616930A CN106231777B CN 106231777 B CN106231777 B CN 106231777B CN 201610616930 A CN201610616930 A CN 201610616930A CN 106231777 B CN106231777 B CN 106231777B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
- H05H13/005—Cyclotrons
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/02—Circuits or systems for supplying or feeding radio-frequency energy
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The present invention relates to a kind of signal source of high stability of superconducting cyclotron, the signal source includes sequentially connected 80MHz times of frequency module, 80MHz frequency stabilization loop module, 400MHz times of frequency module, 400MHz frequency stabilization loop.The cost of the signal source is low, noise is small, and frequency stability is high, reduces the sliding phase problem due to caused by frequency stability in superconducting cyclotron.The frequency-doubling method that the present invention is carried out by diode and the device property of the distinctive avalanche region of triode, by frequency-locked loop the output phase noise to signal source optimization, by the oscillator frequency locking of 400MHz to one on from 10MHz crystal oscillator frequency multiplication to the signal of 400MHz, to improve phase noise performance of the signal at the low bandwidth near DC, so that the frequency stability for improving a reference source can achieve 10‑7。
Description
Technical field
Present invention relates particularly to a kind of signal source of high stability of superconducting cyclotron, belong to superconducting cyclotron skill
Art field.
Background technique
In superconducting cyclotron, the short-term stability of frequency is sliding mutually related in particle accelerating process, wherein particle
The phase of sliding phase and magnetic field and the relationship of electric field are mutually in the integral cunning that radius is the position R
And Δ B (R) therein is and true field Bs(R) difference, Δ ω are to corresponding to BsFrequencies omega difference on the frequency
Value, Δ E are the maximum energy increased of corresponding every circle.When stable magnetic field, accelerator frequency stability will reach 10-7,
It can guarantee sliding mutually less than 5 ° caused by high frequency.The frequency stability of existing common crystals is 10-5.This method is being effectively reduced
The stability of signal source is improved in the case where cost.However, being badly in need of the signal of more high stability with the development of new technology
Source.
Summary of the invention
It is frequency stability is 10 that the crystal oscillator of existing cyclotron, which uses,-5400MHz signal source provided for DDS
Standard time clock proposes a kind of scheme on this basis, by the method for frequency multiplication and frequency locking, by the oscillator frequency locking of 400MHz to one
It is a on from 10MHz crystal oscillator frequency multiplication to the signal of 400MHz.The phase noise performance at low bandwidth to improve signal, to mention
The frequency stability of high a reference source can achieve 10-7。
Specifically, the present invention provides a kind of signal source of high stability of superconducting cyclotron, the signal source include according to
The 80MHz times of frequency module (1) of secondary connection, 80MHz frequency stabilization loop module (2), 400MHz times of frequency module (3), 400MHz frequency stabilization ring
Road (4).
Further, the signal source of high stability of superconducting cyclotron as described above, 80MHz times of frequency module (1),
Including sequentially connected pulse-generating circuit, 80MHz matched filtering circuit, 80MHz amplifying circuit, 80MHz matched filtering circuit.
Further, the signal source of high stability of superconducting cyclotron as described above, the pulse-generating circuit be by
What diode and two subharmonic frequency multiplication of triode were realized.
Further, the signal source of high stability of superconducting cyclotron as described above, the 80MHz frequency stabilization loop mould
Block (2), the loop being made of the frequency discriminator, low-pass filter and 80MHz crystal oscillator that are linked in sequence.
Further, the signal source of high stability of superconducting cyclotron as described above, the 400MHz times of frequency module
(3), it is sequentially connected and to be formed by No. 5 frequency multipliers, 400MHz matched filtering amplifying circuit, 400MHz matched filter.
Further, the signal source of high stability of superconducting cyclotron as described above, the 400MHz frequency stabilization loop (4)
The loop formed is sequentially connected by phase discriminator, low-pass filter and 400MHzDRO resonant oscillator.
Further, the signal source of high stability of superconducting cyclotron as described above, the 400MHzDRO resonance oscillations
Device is the triode low noise oscillator by DRO as resonant cavity.
A kind of signal source of high stability of superconducting cyclotron provided by the invention, it is peculiar by diode and triode
Avalanche region device property carry out frequency-doubling method, by frequency-locked loop the output phase noise to signal source optimization.
By the oscillator frequency locking of 400MHz to one on from 10MHz crystal oscillator frequency multiplication to the signal of 400MHz.It is attached in DC to improve signal
Phase noise performance at close low bandwidth, so that the frequency stability for improving a reference source can achieve 10-7.The signal source at
This is low, noise is small, and frequency stability is high, reduces the sliding phase problem due to caused by frequency stability in superconducting cyclotron.
Detailed description of the invention
Fig. 1 is the system schematic of the signal source of high stability of superconducting cyclotron of the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
A kind of module improving frequency stability in superconducting cyclotron by frequency multiplication and phase-locked loop, it is main to form
Module four parts as shown in Figure 1, be made of: being respectively 80MHz times of frequency module (1), 80MHz frequency stabilization loop module (2), 400MHz
Times frequency module (3), 400MHz frequency stabilization loop (4).
Wherein times frequency module of 80MHz mainly passes through pulse by the signal that the reference crystal oscillator of the high stability of 10MHz exports
Generation circuit, which is shaped to broad pulse circuit via diode by one, then carries out burst pulse shaping via triode,
Parameter by adjusting circuit guarantees the length and size of circuit pulse, and output end connects 80MHz matched filtering circuit to arteries and veins
The frequency spectrum of punching extracts and impedance matching, then connects 80MHz amplifying circuit and extracts previous stage by chopping
Signal amplify, the output of amplifying circuit connects 80MHz matched filtering circuit, and the output of 80MHz matched filtering circuit is made
For the output of 80MHz times of frequency module.
The input of 80MHz frequency stabilization loop module is the output of upper level, the output of the crystal oscillator of the signal and 80MHz
The output frequency of the crystal oscillator of 80MHz is controlled after progress phase demodulation by low-pass filter.
Times frequency module of 400MHz, as No. five frequency multipliers, then passes through 400MHz's by the way of nonlinear transmission line
Matched filtering amplifying circuit, then the output via 400MHz matched filtering as the module.
The output and input of the 400MHzDRO resonant oscillator as phase discriminator of 400MHz times of frequency module, and phase discriminator
The signal of control is controlled the output of 400MHzDRO resonant oscillator by low-pass filter by output.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.If in this way, belonging to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention
Within enclosing, then the present invention is also intended to include these modifications and variations.
Claims (5)
1. a kind of signal source of high stability of superconducting cyclotron, it is characterised in that:
The signal source includes sequentially connected 80MHz times of frequency module (1), 80MHz frequency stabilization loop module (2), 400MHz frequency multiplication
Module (3), 400MHz frequency stabilization loop (4), the 80MHz times of frequency module (1) include sequentially connected pulse-generating circuit,
80MHz matched filtering circuit, 80MHz amplifying circuit, 80MHz matched filtering circuit, the pulse-generating circuit is by diode
It is realized with two subharmonic frequency multiplication of triode, which is shaped to broad pulse by diode, then carries out narrow arteries and veins via triode
Shaping is rushed, then the parameter by adjusting circuit guarantees the length and size of circuit pulse.
2. the signal source of high stability of superconducting cyclotron as described in claim 1, it is characterised in that:
The 80MHz frequency stabilization loop module (2) is frequency discriminator, low-pass filter and 80MHz crystal oscillation by being linked in sequence
The loop of device composition.
3. the signal source of high stability of superconducting cyclotron as described in claim 1, it is characterised in that:
The 400MHz times of frequency module (3) is by No. 5 frequency multipliers, 400MHz matched filtering amplifying circuit, 400MHz matched filtering
Device is sequentially connected composition.
4. the signal source of high stability of superconducting cyclotron as described in claim 1, it is characterised in that:
The 400MHz frequency stabilization loop (4) is to be sequentially connected group by phase discriminator, low-pass filter and 400MHzDRO resonant oscillator
At loop.
5. the signal source of high stability of superconducting cyclotron as claimed in claim 4, it is characterised in that:
The 400MHzDRO resonant oscillator is the triode low noise oscillator by DRO as resonant cavity.
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| CN201610616930.9A CN106231777B (en) | 2016-07-29 | 2016-07-29 | A kind of signal source of high stability of superconducting cyclotron |
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| CN201610616930.9A CN106231777B (en) | 2016-07-29 | 2016-07-29 | A kind of signal source of high stability of superconducting cyclotron |
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| CN106231777A CN106231777A (en) | 2016-12-14 |
| CN106231777B true CN106231777B (en) | 2019-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240993A (en) * | 2020-10-14 | 2021-01-19 | 中国原子能科学研究院 | Evaluation system and method for compact cyclotron magnetic field stability measurement |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650771A (en) * | 2018-07-12 | 2018-10-12 | 北京航天广通科技有限公司 | Self-excitation stable control method, system and the storage medium of accelerator superconductor cavity |
| CN109561567B (en) * | 2018-11-27 | 2020-01-24 | 中国原子能科学研究院 | High-power high-stability variable-load high-frequency acceleration system |
| CN109893777B (en) * | 2019-02-26 | 2020-06-23 | 中国原子能科学研究院 | Phase detector and proton beam phase stabilizing device comprising same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240993A (en) * | 2020-10-14 | 2021-01-19 | 中国原子能科学研究院 | Evaluation system and method for compact cyclotron magnetic field stability measurement |
| CN112240993B (en) * | 2020-10-14 | 2021-07-20 | 中国原子能科学研究院 | Evaluation system and method for compact cyclotron magnetic field stability measurement |
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| CN106231777A (en) | 2016-12-14 |
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