This paper presents the state of art of laser technologies in Poland. A list of primary laser technology development centers is included. The involvement of Polish scientists in the development of lasers and fourth ge...This paper presents the state of art of laser technologies in Poland. A list of primary laser technology development centers is included. The involvement of Polish scientists in the development of lasers and fourth generation synchrotron light sources as well as their applications is discussed. The development of laser applications in medical therapy and diagnostics, material micro- and macro-processing as well as environmental monitoring and protection, safety, and security is presented.展开更多
Beam emittance reduction is an effective method to increase the brightness of a synchrotron light source.Robinson wiggler can play a role in the beam emittance reduction by increasing the horizontal damping partition ...Beam emittance reduction is an effective method to increase the brightness of a synchrotron light source.Robinson wiggler can play a role in the beam emittance reduction by increasing the horizontal damping partition number.A replacement of the quadrupoles in the arc section with short combined function dipoles will construct a single-periodic Robinson wiggler in the SSRF storage ring.This scheme provides a lower beam emittance,without occupying any straight section.Detailed analysis is presented in this paper.展开更多
The selenomethionyl derivative of the thermo-stable catechol 2,3-dioxygenase (SeMet-TC23O) is expressed, purified and crystallized. By using multiwave length anoma-lous dispersion (MAD) phasing techniques, the crystal...The selenomethionyl derivative of the thermo-stable catechol 2,3-dioxygenase (SeMet-TC23O) is expressed, purified and crystallized. By using multiwave length anoma-lous dispersion (MAD) phasing techniques, the crystal structure of TC23O at 0.3 nm resolutions is determined. TC23O is a homotetramer. Each monomer is composed of N-terminal and C-terminal domains (residues 1-153 and 153-319, respectively). The two domains are proximately symmetric by a non-crystallographic axis. Each domain contains two characteristic motifs which are found in almost all of extradial dioxygenases.展开更多
Hefei Light Source(HLS)-II is a vacuum ultraviole(VUV) synchrotron light source. A major upgrade of the light source was finished at the end of 2014. The timing system was rebuilt using compact peripheral component in...Hefei Light Source(HLS)-II is a vacuum ultraviole(VUV) synchrotron light source. A major upgrade of the light source was finished at the end of 2014. The timing system was rebuilt using compact peripheral component interconnect(cPCI) event-driven hardware to meet synchronization requirements of the machine. In the new system, the c PCI event-driven products manufactured by the micro-research finland(MRF) Oy are employed to achieve about 100 output signals with different interfaces. Device supports and drivers developed for common Experimental Physics and Industrial Control System(EPICS) records are used to access the registers on the timing modules. Five c PCI-bus input/output controllers(IOCs) distributed in different areas of the light source host timing modules for various subsystems. The delay resolution of this system is 9.8 ns for most channels and 9 ps for the channels used for triggering the electron gun and the injection kickers. The measured rms jitter of the output signal is less than 27 ps. Using the bucket chooser, this system enables the HLS-II to fill the storage ring with any designated bunch pattern. Benefitting from this upgrade, brightness and performance of the light source are significantly improved.展开更多
合肥光源储存环控制系统是一个基于EPICS(Experiment Physics and Industrial Control System)的分布式控制系统,本文首先描述其硬件结构、软件设计,然后重点介绍束流慢加速、束流闭轨校正、机器状态在线查询、数据存档及历史数据查询...合肥光源储存环控制系统是一个基于EPICS(Experiment Physics and Industrial Control System)的分布式控制系统,本文首先描述其硬件结构、软件设计,然后重点介绍束流慢加速、束流闭轨校正、机器状态在线查询、数据存档及历史数据查询等应用软件的开发。运行结果表明,合肥光源储存环控制系统很好地满足了机器运行和机器研究的需要。展开更多
文摘This paper presents the state of art of laser technologies in Poland. A list of primary laser technology development centers is included. The involvement of Polish scientists in the development of lasers and fourth generation synchrotron light sources as well as their applications is discussed. The development of laser applications in medical therapy and diagnostics, material micro- and macro-processing as well as environmental monitoring and protection, safety, and security is presented.
基金supported by the Beamline Project of Shanghai Synchrotron Radiation Facility
文摘Beam emittance reduction is an effective method to increase the brightness of a synchrotron light source.Robinson wiggler can play a role in the beam emittance reduction by increasing the horizontal damping partition number.A replacement of the quadrupoles in the arc section with short combined function dipoles will construct a single-periodic Robinson wiggler in the SSRF storage ring.This scheme provides a lower beam emittance,without occupying any straight section.Detailed analysis is presented in this paper.
基金This workwas supported by the National Natural Science Foundation of China (Grant No. 30070161) the Hundreds Talents Program of the ChineseAcademy of Sciences.
文摘The selenomethionyl derivative of the thermo-stable catechol 2,3-dioxygenase (SeMet-TC23O) is expressed, purified and crystallized. By using multiwave length anoma-lous dispersion (MAD) phasing techniques, the crystal structure of TC23O at 0.3 nm resolutions is determined. TC23O is a homotetramer. Each monomer is composed of N-terminal and C-terminal domains (residues 1-153 and 153-319, respectively). The two domains are proximately symmetric by a non-crystallographic axis. Each domain contains two characteristic motifs which are found in almost all of extradial dioxygenases.
基金Supported by the National Natural Science Foundation of China(Nos.11375177 and 11375186)
文摘Hefei Light Source(HLS)-II is a vacuum ultraviole(VUV) synchrotron light source. A major upgrade of the light source was finished at the end of 2014. The timing system was rebuilt using compact peripheral component interconnect(cPCI) event-driven hardware to meet synchronization requirements of the machine. In the new system, the c PCI event-driven products manufactured by the micro-research finland(MRF) Oy are employed to achieve about 100 output signals with different interfaces. Device supports and drivers developed for common Experimental Physics and Industrial Control System(EPICS) records are used to access the registers on the timing modules. Five c PCI-bus input/output controllers(IOCs) distributed in different areas of the light source host timing modules for various subsystems. The delay resolution of this system is 9.8 ns for most channels and 9 ps for the channels used for triggering the electron gun and the injection kickers. The measured rms jitter of the output signal is less than 27 ps. Using the bucket chooser, this system enables the HLS-II to fill the storage ring with any designated bunch pattern. Benefitting from this upgrade, brightness and performance of the light source are significantly improved.
文摘合肥光源储存环控制系统是一个基于EPICS(Experiment Physics and Industrial Control System)的分布式控制系统,本文首先描述其硬件结构、软件设计,然后重点介绍束流慢加速、束流闭轨校正、机器状态在线查询、数据存档及历史数据查询等应用软件的开发。运行结果表明,合肥光源储存环控制系统很好地满足了机器运行和机器研究的需要。
