In recent years,heavy ion accelerator technology has been rapidly developing worldwide and widely applied in the fields of space radiation simulation and particle therapy.Usually,a very high uniformity in the irradiat...In recent years,heavy ion accelerator technology has been rapidly developing worldwide and widely applied in the fields of space radiation simulation and particle therapy.Usually,a very high uniformity in the irradiation area is required for the extracted ion beams,which is crucial because it directly affects the experimental precision and therapeutic effect.Specifically,ultra-large-area and high-uniformity scanning are crucial requirements for spacecraft radiation effects assessment and serve as core specification for beamline terminal design.In the 300 MeV proton and heavy ion accelerator complex at the Space Environment Simulation and Research Infrastructure(SESRI),proton and heavy ion beams will be accelerated and ultimately delivered to three irradiation terminals.In order to achieve the required large irradiation area of 320 mm×320 mm,horizontal and vertical scanning magnets are used in the extraction beam line.However,considering the various requirements for beam species and energies,the tracking accuracy of power supplies(PSs),the eddy current effect of scanning magnets,and the fluctuation of ion bunch structure will reduce the irradiation uniformity.To mitigate these effects,a beam uniformity optimization method based on the measured beam distribution was proposed and applied in the accelerator complex at SESRI.In the experiment,the uniformity is successfully optimized from 75%to over 90%after five iterations of adjustment to the PS waveforms.In this paper,the method and experimental results were introduced.展开更多
In order to continually meet the requirements of accelerator, power supply technique at IMP has developed from DC output to pulse output, from slow pulse output to fast pulse output, from analogue control to digital c...In order to continually meet the requirements of accelerator, power supply technique at IMP has developed from DC output to pulse output, from slow pulse output to fast pulse output, from analogue control to digital control. Through development and technology accumulation for about forty years, IMP has formed its own characteristics in many types of power supply, such as high stability DC power supply, PULSE power supply, injection and extraction power supply, etc. In 2015, the work was mainly focused on improving the performance of CSRe (cooling storage experimental ring) and RIBLL 2 (Radioactive Ion Beam Line in Lanzhou) power supplies.展开更多
As the indispensable component of accelerator, the performance of power supply system is directly related withthe performance of accelerator. In order to obtain a high quality beam and improve the operation efficiency...As the indispensable component of accelerator, the performance of power supply system is directly related withthe performance of accelerator. In order to obtain a high quality beam and improve the operation efficiency ofHIRFL (Heavy Ion Research Facility in Lanzhou), the upgrade work of the existing equipments is never stopped inthe power supply system. In 2014, the work was mainly focused on improving the performance of CSRe (coolingstorage experimental ring) and RIBLL 2 (Radioactive Ion Beam Line in Lanzhou).展开更多
CSR power supply system made a great progress in 2002. All power supplies in E-cooler have been arrived in Lanzhou and some of them for CSRm are being tested now. Power supplies in CSR injection line were arrived last...CSR power supply system made a great progress in 2002. All power supplies in E-cooler have been arrived in Lanzhou and some of them for CSRm are being tested now. Power supplies in CSR injection line were arrived last June and installed in February 2003. Pulsed switching converters for CSRm quadruples will be arrived before March 2003. We invited public bidding for dipole magnet power supply of CSRm last December. Two manufacturers are interesting to the power supply. At last we selected one as our cooperator partner. Then展开更多
The construction of the SSC-Linac has made significant progress in 2019.The first beam commissioning of SSC-Linac as an injector of the Separated Sector Cyclotron(SSC)was performed succssfully with ^(40)Ar^(7+) beam a...The construction of the SSC-Linac has made significant progress in 2019.The first beam commissioning of SSC-Linac as an injector of the Separated Sector Cyclotron(SSC)was performed succssfully with ^(40)Ar^(7+) beam and the particle energy of 5.98 MeV/u was obtained at the exit of SSC on December 17,2019.展开更多
The stability of the magnetic fields is crucial for the precision experiments conducted at the experimental Cooler Storage Ring CSRe.From 2016,sudden changes of dB=B>10−4 of CSRe dipole magnetic fields happened irr...The stability of the magnetic fields is crucial for the precision experiments conducted at the experimental Cooler Storage Ring CSRe.From 2016,sudden changes of dB=B>10−4 of CSRe dipole magnetic fields happened irregularly which made the precision mass measurements at CSRe difficult to proceed.Therefore,a monitoring system have been built and the instabilities of the power supply and field strengths of the CSRe dipole magnets have been investigated in 2017.展开更多
More than 100 power supplies are upgraded in the last two years based on full-digital power supply controller.The operation performance is getting better and better.In 2017,HIRFL power supply system operated more than...More than 100 power supplies are upgraded in the last two years based on full-digital power supply controller.The operation performance is getting better and better.In 2017,HIRFL power supply system operated more than 7000 h.The work of PS group focuses on CSRe.The nuclei mass measurement experiment at CSRe is the most important research in IMP in recent years.But the dipole magnet power supply of the CSRe is not stable,which impacted the operation stability of CSRe.Two new power supplies are designed and put into operation by the end of the 2017.The first test results show the current stability and the ripple are improved greatly.At the same time,a complex upgrade is done for good EMI performance at CSRe.展开更多
基金Supported by National Key R&D Program of China(2019YFA0405400)。
文摘In recent years,heavy ion accelerator technology has been rapidly developing worldwide and widely applied in the fields of space radiation simulation and particle therapy.Usually,a very high uniformity in the irradiation area is required for the extracted ion beams,which is crucial because it directly affects the experimental precision and therapeutic effect.Specifically,ultra-large-area and high-uniformity scanning are crucial requirements for spacecraft radiation effects assessment and serve as core specification for beamline terminal design.In the 300 MeV proton and heavy ion accelerator complex at the Space Environment Simulation and Research Infrastructure(SESRI),proton and heavy ion beams will be accelerated and ultimately delivered to three irradiation terminals.In order to achieve the required large irradiation area of 320 mm×320 mm,horizontal and vertical scanning magnets are used in the extraction beam line.However,considering the various requirements for beam species and energies,the tracking accuracy of power supplies(PSs),the eddy current effect of scanning magnets,and the fluctuation of ion bunch structure will reduce the irradiation uniformity.To mitigate these effects,a beam uniformity optimization method based on the measured beam distribution was proposed and applied in the accelerator complex at SESRI.In the experiment,the uniformity is successfully optimized from 75%to over 90%after five iterations of adjustment to the PS waveforms.In this paper,the method and experimental results were introduced.
文摘In order to continually meet the requirements of accelerator, power supply technique at IMP has developed from DC output to pulse output, from slow pulse output to fast pulse output, from analogue control to digital control. Through development and technology accumulation for about forty years, IMP has formed its own characteristics in many types of power supply, such as high stability DC power supply, PULSE power supply, injection and extraction power supply, etc. In 2015, the work was mainly focused on improving the performance of CSRe (cooling storage experimental ring) and RIBLL 2 (Radioactive Ion Beam Line in Lanzhou) power supplies.
文摘As the indispensable component of accelerator, the performance of power supply system is directly related withthe performance of accelerator. In order to obtain a high quality beam and improve the operation efficiency ofHIRFL (Heavy Ion Research Facility in Lanzhou), the upgrade work of the existing equipments is never stopped inthe power supply system. In 2014, the work was mainly focused on improving the performance of CSRe (coolingstorage experimental ring) and RIBLL 2 (Radioactive Ion Beam Line in Lanzhou).
文摘CSR power supply system made a great progress in 2002. All power supplies in E-cooler have been arrived in Lanzhou and some of them for CSRm are being tested now. Power supplies in CSR injection line were arrived last June and installed in February 2003. Pulsed switching converters for CSRm quadruples will be arrived before March 2003. We invited public bidding for dipole magnet power supply of CSRm last December. Two manufacturers are interesting to the power supply. At last we selected one as our cooperator partner. Then
文摘The construction of the SSC-Linac has made significant progress in 2019.The first beam commissioning of SSC-Linac as an injector of the Separated Sector Cyclotron(SSC)was performed succssfully with ^(40)Ar^(7+) beam and the particle energy of 5.98 MeV/u was obtained at the exit of SSC on December 17,2019.
文摘The stability of the magnetic fields is crucial for the precision experiments conducted at the experimental Cooler Storage Ring CSRe.From 2016,sudden changes of dB=B>10−4 of CSRe dipole magnetic fields happened irregularly which made the precision mass measurements at CSRe difficult to proceed.Therefore,a monitoring system have been built and the instabilities of the power supply and field strengths of the CSRe dipole magnets have been investigated in 2017.
文摘More than 100 power supplies are upgraded in the last two years based on full-digital power supply controller.The operation performance is getting better and better.In 2017,HIRFL power supply system operated more than 7000 h.The work of PS group focuses on CSRe.The nuclei mass measurement experiment at CSRe is the most important research in IMP in recent years.But the dipole magnet power supply of the CSRe is not stable,which impacted the operation stability of CSRe.Two new power supplies are designed and put into operation by the end of the 2017.The first test results show the current stability and the ripple are improved greatly.At the same time,a complex upgrade is done for good EMI performance at CSRe.
