上海光源(SSRF)工程采用一种新型数字BPM(Beam Position Monitor)处理器—Libera作为束流位置监测的主要设备,Libera的一些关键参数如分辨率、流强依赖性和填充模式依赖性需要在一个可靠高效的测试平台上完成测试,本文介绍了Libera自动...上海光源(SSRF)工程采用一种新型数字BPM(Beam Position Monitor)处理器—Libera作为束流位置监测的主要设备,Libera的一些关键参数如分辨率、流强依赖性和填充模式依赖性需要在一个可靠高效的测试平台上完成测试,本文介绍了Libera自动测试系统的开发。该测试系统基于EPICS(Experimental Physics and Industrial Control System)和虚拟仪器技术,采用LabVIEW CA Library实现二者的跨平台数据访问,具有良好的重用性和友善的用户界面。目前该系统已经应用于上海光源工程的Libera验收测试。展开更多
我们用S(α,β)表示在单位圆E={z∶|z+<1}内解析并且满足条件|[zf′(z)/f(z)-1]/[αzf′(z)/f(z)+1]|<β,0≤α≤1,0<β≤1,的函数之全体,在本文中,将证明如果函数f(z)属于S(α,β),那么F_c(f)=((C+1)/z^c) integral from n=0 ...我们用S(α,β)表示在单位圆E={z∶|z+<1}内解析并且满足条件|[zf′(z)/f(z)-1]/[αzf′(z)/f(z)+1]|<β,0≤α≤1,0<β≤1,的函数之全体,在本文中,将证明如果函数f(z)属于S(α,β),那么F_c(f)=((C+1)/z^c) integral from n=0 to 1 t^(c-1)f(t)dt也属于S(α,β)。展开更多
SSRF diagnostics system will adopt a new generation digital electron beam position processor,Libera,as the signal condition,signal processing and data acquisition device for beam position monitor.In order to provide a...SSRF diagnostics system will adopt a new generation digital electron beam position processor,Libera,as the signal condition,signal processing and data acquisition device for beam position monitor.In order to provide a uniform data and control interface for users,we developed an EPICS interface based on Control System Programming Interface (CSPI) layer,allowing the performance of the electron beam to be monitored through EPICS channels.In this interface a new record type for BPM was defined and its associated support routines were implemented.展开更多
With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digi...With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digital BPM based on software radio and digital receiver,has gained first successful application in accelerator at SLS. The company of Instrumentation Technologies made many efforts to update this device and finally the family devices- Libera were formed.It integrates the analog RF front end electronics,A/D converter,digital signal processing and synchrony trigger into an all in one measurement system with wideband.The Libera can be used at different types of accelerators and it has the functions of first turn,turn by turn and COD measurement.It plays an important role in the BEPCⅡearly commissioning,especially in the beam circulating and stacking of BER and BPR,and also in the residual orbit oscillation measurement.In this paper,we introduce some measurement results by using the multifarious function of Libera,such as first turn,tune,residual orbit oscillation and optimum delay time of injection kicker.展开更多
文摘上海光源(SSRF)工程采用一种新型数字BPM(Beam Position Monitor)处理器—Libera作为束流位置监测的主要设备,Libera的一些关键参数如分辨率、流强依赖性和填充模式依赖性需要在一个可靠高效的测试平台上完成测试,本文介绍了Libera自动测试系统的开发。该测试系统基于EPICS(Experimental Physics and Industrial Control System)和虚拟仪器技术,采用LabVIEW CA Library实现二者的跨平台数据访问,具有良好的重用性和友善的用户界面。目前该系统已经应用于上海光源工程的Libera验收测试。
文摘我们用S(α,β)表示在单位圆E={z∶|z+<1}内解析并且满足条件|[zf′(z)/f(z)-1]/[αzf′(z)/f(z)+1]|<β,0≤α≤1,0<β≤1,的函数之全体,在本文中,将证明如果函数f(z)属于S(α,β),那么F_c(f)=((C+1)/z^c) integral from n=0 to 1 t^(c-1)f(t)dt也属于S(α,β)。
文摘SSRF diagnostics system will adopt a new generation digital electron beam position processor,Libera,as the signal condition,signal processing and data acquisition device for beam position monitor.In order to provide a uniform data and control interface for users,we developed an EPICS interface based on Control System Programming Interface (CSPI) layer,allowing the performance of the electron beam to be monitored through EPICS channels.In this interface a new record type for BPM was defined and its associated support routines were implemented.
文摘With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digital BPM based on software radio and digital receiver,has gained first successful application in accelerator at SLS. The company of Instrumentation Technologies made many efforts to update this device and finally the family devices- Libera were formed.It integrates the analog RF front end electronics,A/D converter,digital signal processing and synchrony trigger into an all in one measurement system with wideband.The Libera can be used at different types of accelerators and it has the functions of first turn,turn by turn and COD measurement.It plays an important role in the BEPCⅡearly commissioning,especially in the beam circulating and stacking of BER and BPR,and also in the residual orbit oscillation measurement.In this paper,we introduce some measurement results by using the multifarious function of Libera,such as first turn,tune,residual orbit oscillation and optimum delay time of injection kicker.
