Chen, J.

Paper	Title	Page
TUP005	Preliminary Planning of Taiwan Photon Source Control Network	105
	Y.-T. Chang, J. Chen, Y. K. Chen, Y.-S. Cheng, K. T. Hsu, S. Y. Hsu, K. H. Hu, C. H. Kuo NSRRC, Hsinchu
	The future Taiwan Photon Source (TPS) control network is used for the accelerator system control and it is one of the most important infrastructures for the control system which is based upon the EPICS toolkit framework. The TPS network is built to be a modern, reliable, flexible and secure environment between public and private Ethernet with various network control and monitor technique. These include of firewall, SNMP, QOS, VPN, etc. Network tunneling technique will be applied in the remote access, out of TPS especially. The Ethernet will be intensively used as field bus also, topology of the field bus is also considered. This paper will describe the preliminary planning and conceptual design for the TPS control system network. We also discuss the system architecture in this conference that consists of cabling topology, redundancy and maintainability.
	Poster
TUP045	Preliminary Test of EPICS Waveform Support for TPS	185
	Y.-S. Cheng, J. Chen, Y. K. Chen, P. C. Chiu, K. T. Hsu, K. H. Hu, C. H. Kuo, C. Y. Wu NSRRC, Hsinchu
	The TPS (Taiwan Photon Source) is newly proposed the 3 GeV synchrotron light source project. The control system of TPS is based upon EPICS framework. Waveform acquisition supports are essential for the commissioning and operation. The EPICS IOCs, scope IOCs, digitizers and oscilloscopes can support to acquire waveform through EPICS channel access. The EDM is used to implement the operation interface. The control environments of TPS provide specific operation EDM pages of waveform acquired from EPICS IOC, digitizers and oscilloscopes with various sampling rate and vertical resolution. The environment is implemented and tested at the Taiwan Light Source (TLS). The efforts will be summaries at this report.
	Poster
TUD006	Design Status of the TPS Control System	355
	K. T. Hsu, Y.-T. Chang, J. Chen, Y. K. Chen, Y.-S. Cheng, P. C. Chiu, S. Y. Hsu, K. H. Hu, C. H. Kuo, D. Lee, C.-J. Wang, C. Y. Wu NSRRC, Hsinchu
	The Taiwan Photon Source (TPS) project will build a new 3 GeV synchrotron light source at the site of NSRRC. Refinement of the TPS control system design is on going. The control system is based on EPICS toolkits framework. Guidelines for hardware platform and operating system choice will be addressed. Various EPICS test bed has be setup to evaluate selected hardware and software components. The TPS control system will provide versatile environments for machine commissioning, operation, and accelerator research. The open architecture will facilitate machine upgrade, modification easily and minimize efforts for machine maintenance. Performance and reliability of the control system will be guaranteed from the initial design phase. Current efforts will be summary in this report.
WEP072	New Control System for the EPU 4.6	540
	C. Y. Wu, J. Chen, K. T. Hsu, S. Y. Hsu, K. H. Hu, D. Lee NSRRC, Hsinchu
	In order to redesign and improve performance of EPU 4.6 for the Taiwan Light Source (TLS), implement new control system and develop application programs of EPU 4.6 are under way. The EPU 4.6 driver system includes 8 axes servo motors with Sin/Cos absolute encoder and 8 SSI absolute encoders for precision position control. Due to proprietary design of the vendor and lack of needed technical documents of the existed motor drivers and motor controllers, obsolete these devices and replaced by another open solution is the most difficult decision. A VME crate installs CPU board, DI, DO, AI and AO card, SSI read-only interface is used as EPU 4.6 controller. The motion controllers are connected to the VME CPU via Ethernet directly. The power supplies of correction coil are MCOR30 system manufactured by BiRa Systems. The simple PLC dedicated for interlock protection purpose which take input from limit switches, kill switches, tilt sensors and emergency button from the driver system. The interlock logic will restrict motion if any limit sensor is activated before removed and interlock reset. Features and benefits of the new control system of EPU 4.6 will be summary in this report.
	Poster
THP064	Orbit Feedback in Taiwan Light Source	785
	C. H. Kuo, J. Chen, P. C. Chiu, K. T. Hsu, K. H. Hu NSRRC, Hsinchu
	The global orbit feedback system is indispensable for the Taiwan Light Source (TLS) operation. The existed orbit feedback system has been deployed for a decade to stabilize electron closed orbit. This orbit feedback system is used to suppress various perturbations include orbit excursion due to insertion device operation in TLS. To take advantage of advanced in BPM and power supply technology, the feedback system is upgraded recently accompany with BPM electronic and corrector power supply upgrade; infrastructure of new system has also been modified and rebuilt. Orbit stability is improved drastically. Efforts of digital BPM (Libera Brillance), PWM power supply, orbit feedback system, on-line system modeling, diagnostic access, and control rules upgrade with reduced ill-conditioned response matrix will be presented in this report. Planning the global orbit feedback system based upon experiences accumulate form TLS project for the newly proposed Taiwan Photon Source (TPS) will be summary also.
	Poster
THP113	Upgrade the Machine Status Broadcast System by PHP Framework	895
	Y.-S. Cheng, Y.-T. Chang, J. Chen, Y. K. Chen, K. T. Hsu, K. H. Hu, C. H. Kuo NSRRC, Hsinchu
	To improve the display quality and enhance expandability of machine status broadcasting, the existing cable TV will be replaced by a network interface to transmit the machine status display. To access the display page without installing other toolkit easily, we use a network browser to show the machine status display. Thus we implement a broadcast system by the PHP Framework on Linux server and show main machine status, trend plots and images. Then we use a thin PC (loaded OS and browser) to combine LCD TV to show the full-frame display page. By means of it, the machine status display is clearer to be observed. On the other hand, to reduce impacts of the network bandwidth, we avoid using the additional applet to aggravate the network bandwidth. Our design will be based on low network loading to upgrade the machine status broadcast system. Moreover we will measure the variation of network throughput to learn the effect of numbers of accessing clients. According to the measurement result, we can estimate the relation between the network loading and numbers of accessing clients.
	Poster