CN111328177A - Method and system for merging bunches in synchrotron - Google Patents
Method and system for merging bunches in synchrotron Download PDFInfo
- Publication number
- CN111328177A CN111328177A CN202010195053.9A CN202010195053A CN111328177A CN 111328177 A CN111328177 A CN 111328177A CN 202010195053 A CN202010195053 A CN 202010195053A CN 111328177 A CN111328177 A CN 111328177A
- Authority
- CN
- China
- Prior art keywords
- frequency
- frequency system
- voltage
- voltage value
- clusters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H05H13/02—Synchrocyclotrons, i.e. frequency modulated cyclotrons
-
- 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
- H05H7/06—Two-beam arrangements; Multi-beam arrangements storage rings; Electron rings
-
- 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
- H05H7/06—Two-beam arrangements; Multi-beam arrangements storage rings; Electron rings
- H05H2007/065—Multi-beam merging, e.g. funneling
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Particle Accelerators (AREA)
Abstract
The invention belongs to the field of accelerators, and relates to a beam group merging method in a synchrotron, which comprises the following steps: s1, the working frequency of a high-frequency system is 2 of the convolution frequency of a beamnMultiple, i.e. harmonic, number 2nRecording the voltage of the high-frequency system, the number of beam clusters is 2nWherein n is a positive integer; s2, reducing the number of beam groups to 2 by adjusting the voltage of the high-frequency systemn2; and S3, repeating the step S2 until the number of the clusters is reduced to 1, and realizing cluster combination. The main advantage of this over the loose bundle approach is that the time taken for the individual cluster to be produced can be reduced too much and the final cluster length can be controlled to a large extent.
Description
Technical Field
The invention relates to a method and a system for merging bunches in a synchrotron, belonging to the technical field of accelerators.
Background
The synchrotron controls the frequency of a magnetic field and an accelerating electric field according to the acceleration of the particles, accelerates the particles through a resonant high-frequency cavity while keeping the orbit radius of the accelerated particles constant, and can achieve higher energy in the synchrotron compared with a traditional linear accelerator and a traditional cyclotron. However, when the injection energy is low, the cyclotron frequency of the beam in the synchrotron is far lower than the lower limit of the frequency of the high-frequency system, and at this time, if the high-frequency system operates at the first harmonic, the beam cannot be accelerated.
When the beam is accelerated to the expected energy by a high-frequency system working at higher harmonics, a plurality of bunches are arranged in the synchrotron, the number and the harmonic number of the bunches are the same, but the synchrotron has the requirement on fast beam extraction that the number of the bunches in a ring is one, namely single bunch extraction. The following methods are generally adopted in the prior art to meet the requirement of single cluster extraction: after the beam current reaches the expected energy, the high-frequency system voltage is gradually increased under the condition of first harmonic to capture the scattered continuous beam into a single beam cluster. The method can change any number of clusters into a single cluster, but in order to control the increase of longitudinal emittance in the whole process, the beam scattering and capturing processes must meet the adiabatic condition which requires that the beam scattering time and the capturing time are far longer than the longitudinal oscillation period, so that the operation period of a machine can be prolonged, the effective beam supply time is reduced, and the effective experiment time is finally reduced by adopting the method to generate the single cluster; furthermore, the length of the individual clusters produced by recapture means is approximately 1/2-1/3 of the ring perimeter, making it difficult to adjust the cluster length. For a synchrotron with a longer perimeter, the time for leading out elements, particularly kicking the rail magnet bucker platform, can be increased by a long beam, and further the design difficulty and the operation stability are increased.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a method and system for merging clusters in a synchrotron, which has the major advantages over the walk method in that the time taken for the generation of a single cluster can be reduced and the final cluster length can be controlled to a large extent.
In order to achieve the above object, the present invention provides a method for merging bunches in a synchrotron, comprising the following steps: s1, setting the working frequency of a high-frequency system as the convolution frequency of a beam current 2nThe voltage of the high-frequency system is recorded, and the beam cluster number is 2nWherein n is a positive integer; s2, reducing the number of beam groups to 2 by adjusting the voltage value of the high-frequency system n2; and S3, repeating the step S2 until the number of the clusters is reduced to 1, and realizing cluster combination.
Further, the specific process of adjusting the voltage of the high-frequency system in step S2 is as follows: let the voltage value of the high-frequency system be ViI is the harmonic number of the high-frequency system, ViAt time tiInternally reduced to the cavity activation voltage value while at time tiIncreasing the voltage of high-frequency system with harmonic number of i/2 from the cavity activation voltage value to Vi/2At this time, the number of clusters is changed from i to i/2.
Further, by adjusting the voltage value ViAnd time tiTo improve beam cluster uniformity.
The invention also discloses a system for merging clusters in the synchrotron, which comprises: a voltage detection module for setting the working frequency of the high-frequency system to 2 of the cyclotron frequency of the beam currentnMultiple, 2nThe voltage of the high-frequency system is recorded for the harmonic number, the beam number being 2 in this casenWherein n is a positive integer not equal to 1; a voltage regulating module for reducing the number of beam groups to 2 by regulating the voltage value of the high-frequency systemnAnd/2, repeatedly adjusting the voltage value of the high-frequency system until the number of the beam clusters is reduced to 1, and realizing beam cluster combination.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the time taken for generating a single bunch by combining a plurality of accelerated bunches is obviously shorter than the time taken for generating a single bunch by bunching after adiabatic dispersion. 2. The final beam parameters such as the length, momentum dispersion and uniformity of a single beam cluster obtained in the invention are determined by the merging time and the voltage amplitude of a high-frequency system working at different harmonic numbers, so that the beam parameters, particularly the beam cluster length, can be adjusted according to different physical experiment requirements, specific beam conditions are provided for different physical experiments, and the development of related physical experiments based on heavy ions is facilitated to a greater extent.
Drawings
Fig. 1 is a diagram of the distribution of the accumulated beam current in the phase space of a heavy ion beam current injection enhancer in accordance with an embodiment of the present invention;
FIG. 2 is a distribution plot of the beam current in phase space after acceleration of a heavy ion beam current in an intensifier in accordance with an embodiment of the present invention;
FIG. 3 is a phase space distribution plot of a heavy ion beam current from 4 clusters combined into 2 clusters in accordance with an embodiment of the present invention;
FIG. 4 is a phase space distribution plot of a heavy ion beam current from 2 clusters combined into 1 cluster in accordance with an embodiment of the present invention;
FIG. 5 is a graph of high frequency voltage during beam trapping, acceleration combining, etc. stages in accordance with an embodiment of the present invention;
FIG. 6 is a graph of the frequency of the high frequency cavity during beam capture and acceleration combining in an embodiment of the present invention;
FIG. 7 is a phase space distribution plot of the heavy ion beam current after the second step of combining in accordance with an embodiment of the present invention;
fig. 8 is a phase space distribution diagram of the heavy ion beam current after the second step of combination according to an embodiment of the present invention.
Detailed Description
The present invention is described in detail by way of specific embodiments in order to better understand the technical direction of the present invention for those skilled in the art. It should be understood, however, that the detailed description is provided for a better understanding of the invention only and that they should not be taken as limiting the invention. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be indicative or implied of relative importance.
Example one
The embodiment discloses a method for merging bunches in a synchrotron, which comprises the following steps:
s1, setting the working frequency of a high-frequency system as the convolution frequency of a beam current 2nThe voltage of the high-frequency system is recorded, and the beam cluster number is 2nWherein n is a positive integer;
s2, reducing the number of beam groups to 2 by adjusting the voltage value of the high-frequency systemn/2；
And S3, repeating the step S2 until the number of the clusters is reduced to 1, and realizing cluster combination.
The specific process of adjusting the voltage of the high-frequency system in the step 2 is as follows: the specific process of adjusting the voltage of the high-frequency system in step S2 is as follows: let the voltage value of the high-frequency system be ViI is the harmonic number of the high-frequency system, ViAt time tiInternally reduced to the cavity activation voltage value while at time tiIncreasing the voltage of the high-frequency system with harmonic number of i/2 from the voltage value of the cavity activation beam group to Vi/2At this time, the number of clusters is changed from i to i/2.
Wherein the voltage value V of the high-frequency systemiDetermined according to the desired energy to which the beam is accelerated, and can be adjusted by adjusting ViAnd tiTo improve beam cluster uniformity.
In order to make the description of the method in this embodiment clearer, n-3 is taken as an example for explanation. It should be noted that n may be a positive integer, but n is not equal to 0, because n is 0, and no merging is required.
1. When n is 3, the harmonic number is 8, that is, the operating frequency of the high-frequency system is 8 times of the cyclotron frequency of the beam, and when the high-frequency system is accelerated to the expected energy, the voltage value of the high-frequency system is V8The number of clusters is 8, usually V8Much lower than the voltage amplitude that can be provided by high frequency systems. At this time, the voltage value of the high frequency system is set at time t8Internal slave V8And reducing the voltage value to the cavity activation voltage value, wherein the cavity activation voltage value is close to 0V. At V8In the course of the reduction, i.e. time t8Raising the voltage of the high-frequency system from the cavity activation voltage value to a high-frequency system voltage V corresponding to a harmonic number of 44So that the number of clusters in the ring is changed from 8 to 4The first step of the bunch merging is now present.
The voltage value of the high-frequency system is set at the time t8Internal slave V8Reducing the voltage to a cavity activation voltage value, and simultaneously increasing the voltage of the high-frequency system from the cavity activation voltage value to a high-frequency system voltage value V corresponding to a harmonic number of 44The process specifically comprises the following steps: because the high-frequency system consists of a plurality of high-frequency cavities, when the beam current reaches the expected energy, the voltage value is V8Voltage value from V8When the voltage is reduced to the cavity activation voltage value, only part of the high-frequency cavity is required to be in a standby state, namely when the voltage is V8At the start of the lowering, a high-frequency cavity in a standby state is started, the operating harmonic number of which is 4, at t8Rise in time from the cavity activation voltage value to V4。
2. High-frequency system voltage value V corresponding to harmonic number of 44At time t4Internal slave V4Gradually decreases to the cavity activation voltage value at V4In the course of the reduction, i.e. time t4Raising the voltage value of the high-frequency system from the cavity activation voltage value to a high-frequency system voltage value V corresponding to a harmonic number of 22Thus changing the number of clusters in the ring from 4 to 2 and realizing the second step of merging of clusters;
3. high-frequency system voltage value V corresponding to harmonic number of 22At time t2Internal slave V2Gradually decreases to the cavity activation voltage value at V2In the course of the reduction, i.e. time t2Raising the voltage value of the high-frequency system from the cavity activation voltage value to a high-frequency system voltage value V corresponding to a harmonic number of 11Therefore, the number of clusters in the ring is changed from 2 to 1, and finally 8 clusters are successfully combined into 1 cluster, so that the purpose of cluster combination is achieved.
Wherein V8Derived from the theory of correlation acceleration, V4、V2、V1And t8，t4、t2The isoparametric is determined by the properties of the exiting cluster, in principle V4、V2、V1It is necessary to select a suitable value, and if the value is too small, the beam cluster merging cannot be completed, and the beam cluster merging is satisfiedIn this case, the amplitude should be selected to be a small value, but too small a value may cause the length of the extracted beam to be long, which is not favorable for the development of the related physical experiment, and may increase the difficulty of designing the extraction original. And for t8，t4、t2In principle, longer is more beneficial to achieve uniform beam bunching, but too long increases machine cycle time and decreases effective beam time.
Example two
Based on the same inventive concept, the present embodiment discloses how to use the method of merging clusters in the synchrotron of the first embodiment in a heavy ion synchrotron with strong current. In the embodiment, the 4 th harmonic is used for accelerating the heavy ion beam current in the enhancer BRIng of the HIAF of the high current heavy ion synchrotron238U35+The beam-merging process is shown by way of example for calculation, simulation and tracking.
As shown in fig. 1, after the beam injection accumulation is finished, the beam is uniformly distributed along the ring, and the momentum dispersion is gaussian. Due to the beam current238U35+The injection energy is 17MeV/u, the cyclotron frequency of the corresponding beam current is 0.099MHz, and the cyclotron frequency is far lower than the lower limit of the frequency of the high-frequency cavity. As shown in fig. 2, the high frequency system operates at 4 th harmonic to capture and accelerate the beam, so that 4 bunches exist in the ring after the acceleration is finished. In order to extract the beam current from the ring at one time, 4 clusters need to be combined into 1 cluster before extraction, and the combining process starts at the acceleration end time.
The specific process of cluster merging is as follows:
first, as shown in fig. 3, the gap voltage of the high frequency cavity operating at 4 th harmonic linearly decreases from 4.5kV after the end of acceleration to the cavity activation voltage value within 10ms, and at the same time, the gap voltage of the high frequency cavity linearly increases from the cavity activation voltage value to 50kV corresponding to 2 nd harmonic within 10ms, during which process the clusters are combined from 4 to 2.
Next, as shown in fig. 4, the gap voltage of the high frequency cavity operating at the 2 nd harmonic linearly decreases from 50kV to the cavity activation voltage value within 10ms, and at the same time, the gap voltage of the high frequency cavity linearly increases from the cavity activation voltage value to the high frequency cavity gap voltage 90kV corresponding to the 1 st harmonic within 10ms, in the process, the clusters are combined from 2 to 1. The beam combination process is finished, and the beam condition meets the requirement of fast extraction. In the whole process from capture and acceleration to the end of beam group combination, the high-frequency voltage and synchronous phase curve of different harmonics are shown in fig. 5, and the beam group combination starts from time t, as can be seen from the figure, the high-frequency voltage corresponding to h-4 linearly decreases from 4.5kV to the cavity activation voltage value within 10ms, the high-frequency voltage corresponding to h-2 linearly increases from the cavity activation voltage value to 50kV within 10ms, at this time, the beam groups are combined into 2 beams, as shown in fig. 3, next, the high-frequency voltage corresponding to h-2 linearly decreases from 50kV to the cavity activation voltage value within 10ms, the high-frequency voltage corresponding to h-1 linearly increases from the cavity activation voltage value to 90kV within 10ms, at this time, the beam groups are combined into 1 beam group, as shown in fig. 4. In the beam group merging stage, the synchronization phases of the high-frequency systems working at different harmonic numbers are all 0, and the corresponding high-frequency working frequencies are as shown in fig. 6.
Compared with the beam cluster distribution shown in fig. 3 and 4, in order to obtain a beam cluster with higher uniformity, the time for combining 4 beams into 2 beams is increased from 10ms to 80ms, the time for combining 2 beams into 1 beams is increased from 10ms to 100ms, and the obtained beam cluster distribution is shown in fig. 7 and 8.
EXAMPLE III
Based on the same inventive concept, the embodiment discloses a system for merging clusters in a synchrotron, which comprises:
a voltage detection module for setting the working frequency of the high-frequency system to 2 of the cyclotron frequency of the beam currentnMultiple, 2nThe voltage of the high-frequency system is recorded for the harmonic number, the beam number being 2 in this casenWherein n is a positive integer not equal to 1;
a voltage regulating module for reducing the number of beam groups to 2 by regulating the voltage value of the high-frequency systemnAnd/2, repeatedly adjusting the voltage value of the high-frequency system until the number of the beam clusters is reduced to 1, and realizing beam cluster combination.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. A method for merging bunches in a synchrotron is characterized by comprising the following steps:
s1, setting the working frequency of a high-frequency system as the convolution frequency of a beam current 2nThe voltage of the high-frequency system is recorded, and the beam cluster number is 2nWherein n is a positive integer;
s2, reducing the number of beam groups to 2 by adjusting the voltage value of the high-frequency systemn/2；
And S3, repeating the step S2 until the number of the clusters is reduced to 1, and realizing cluster combination.
2. The method for merging clusters in a synchrotron according to claim 1, wherein the specific process of adjusting the voltage of the high-frequency system in the step 2 is as follows:
the specific process of adjusting the voltage of the high-frequency system in step S2 is as follows: let the voltage value of the high-frequency system be ViI is the harmonic number of the high-frequency system, ViAt time tiInternally reduced to the cavity activation voltage value while at time tiIncreasing the voltage of high-frequency system with harmonic number of i/2 from the cavity activation voltage value to Vi/2At this time, the number of clusters is changed from i to i/2.
3. The method of merging clusters in a synchrotron of claim 2, wherein said method is performed by adjusting the voltage value V during cluster mergingiAnd time tiTo improve beam cluster uniformity.
4. A merge bunch system in a synchrotron, comprising:
a voltage detection module for setting the working frequency of the high-frequency system as the convolution of the beam current2 of frequencynMultiple, 2nThe voltage of the high-frequency system is recorded for the harmonic number, the beam number being 2 in this casenWherein n is a positive integer;
a voltage regulating module for reducing the number of beam groups to 2 by regulating the voltage value of the high-frequency systemnAnd/2, repeatedly adjusting the voltage value of the high-frequency system until the number of the beam clusters is reduced to 1, and realizing beam cluster combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195053.9A CN111328177A (en) | 2020-03-19 | 2020-03-19 | Method and system for merging bunches in synchrotron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195053.9A CN111328177A (en) | 2020-03-19 | 2020-03-19 | Method and system for merging bunches in synchrotron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111328177A true CN111328177A (en) | 2020-06-23 |
Family
ID=71171607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010195053.9A Pending CN111328177A (en) | 2020-03-19 | 2020-03-19 | Method and system for merging bunches in synchrotron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111328177A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652017A (en) * | 2009-01-12 | 2010-02-17 | 中国科学院近代物理研究所 | Synchronous acceleration method of high frequency variable harmonics and control device thereof |
| US20150005567A1 (en) * | 2013-06-27 | 2015-01-01 | Brookhaven Science Associates, Llc | Multi Turn Beam Extraction from Synchrotron |
| CN205156841U (en) * | 2015-11-19 | 2016-04-13 | 中国科学技术大学 | Length -measuring appliance of group of restrainting based on resonant cavity |
| CN110705085A (en) * | 2019-09-26 | 2020-01-17 | 中国科学院近代物理研究所 | Control method and system for high-frequency digital low level in single sine mode of accelerator |
-
2020
- 2020-03-19 CN CN202010195053.9A patent/CN111328177A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652017A (en) * | 2009-01-12 | 2010-02-17 | 中国科学院近代物理研究所 | Synchronous acceleration method of high frequency variable harmonics and control device thereof |
| US20150005567A1 (en) * | 2013-06-27 | 2015-01-01 | Brookhaven Science Associates, Llc | Multi Turn Beam Extraction from Synchrotron |
| CN205156841U (en) * | 2015-11-19 | 2016-04-13 | 中国科学技术大学 | Length -measuring appliance of group of restrainting based on resonant cavity |
| CN110705085A (en) * | 2019-09-26 | 2020-01-17 | 中国科学院近代物理研究所 | Control method and system for high-frequency digital low level in single sine mode of accelerator |
Non-Patent Citations (3)
| Title |
|---|
| CERN ET AL.: "Simulations of Bunch Merging in a Beta Beam Decay Ring", 《ARXIV:1109.1777V1 [PHYSICS.ACC-PH]》 * |
| HARALD KLINGBEIL ET AL.: "New digital low-level rf system for heavy-ion synchrotrons", 《PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS》 * |
| YURI K. BATYGIN ET AL.: "MERGING BEAM-BEAM INTERACTION", 《PROCEEDINGS OF THE 1999 PARTICLE ACCELERATOR CONFERENCE, NEW YORK》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2004523068A (en) | Device for pre-acceleration of ion beam used in heavy ion beam application system | |
| KR20210005741A (en) | Compact high energy ion implantation system and apparatus and method for generating high energy ion beam | |
| CN107251658B (en) | The synchrotron method of operation for entering reflector system and draft tube linac | |
| JP2013543249A (en) | Sub-nanosecond ion beam pulsed radio frequency quadrupole (RFQ) linear accelerator system and method therefor | |
| CN111630940B (en) | Accelerator and accelerator system | |
| Garoby et al. | Demonstration of bunch triple splitting in the CERN PS | |
| CN111328177A (en) | Method and system for merging bunches in synchrotron | |
| Qiang et al. | Start-to-end simulation of x-ray radiation of a next generation light source using the real number of electrons | |
| CN100364369C (en) | Method for modulating radio frequency four polar field accelerator | |
| Batkin et al. | Neutral beam injectors for the GOL-NB facility | |
| Verra et al. | Seeding of proton bunch self-modulation by an electron bunch in plasma | |
| Alexeev et al. | Status of the terawatt accumulator accelerator project | |
| JP5368173B2 (en) | High-frequency accelerator and annular accelerator | |
| Kuriki et al. | Beam Loading Compensation of Traveling Wave Linac to a Multi-bunch Pulse with Gaps | |
| Suzuki et al. | High efficiency klystron design and test result in TETD | |
| Atkinson et al. | VSR injector upgrade at BESSY II | |
| JP2617240B2 (en) | Control method of acceleration energy in high frequency quadrupole accelerator | |
| JP5527536B2 (en) | Laser fusion device | |
| RU2312473C2 (en) | Acceleration method and ion accelerator | |
| MacLachlan | The Beam Dynamics of Slip Stacking | |
| Zhao et al. | Longitudinal stacking of ion beams with pulsed electron beam cooling | |
| WO2018042539A1 (en) | Circular accelerator | |
| Chernov et al. | Buncher of electron linac-injector for a synchrotron | |
| RU46403U1 (en) | ION ACCELERATOR | |
| Wang et al. | Recent progress on beam stability study in the PSR |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200623 |
|
| WD01 | Invention patent application deemed withdrawn after publication |