Paper |
Title |
Page |
TUP216 |
Design of a Helium Phase Separator with Condenser |
1214 |
|
- F. Z. Hsiao, T.Y. Huang, C.P. Liu, H.H. Tsai
NSRRC, Hsinchu, Taiwan
|
|
|
This paper presents the design of a helium phase separator with volume of 100 litres. A condenser using a cryocooler for cooling is built into the phase separator to save liquid helium consumption during the test period. The heat loss to the 4.2 K inner vessel is confined within 1W due to the limited 1.5W cooling capacity from the cryocooler. Analysis of mechanical strength and heat load is illustrated.
|
|
|
TUP217 |
The Application of 400KW DC Bank for Cryogenic System at NSRRC |
1217 |
|
- H.C. Li, S.-H. Chang, W.-S. Chiou, F. Z. Hsiao, T.F. Lin, H.H. Tsai
NSRRC, Hsinchu, Taiwan
|
|
|
There will be a power sag (>50% drop) several times and annual maintenance of power company every year that course cryogenic system shutdown and take hours to recover. We install the AC UPS to maintain a steady power supply to the control circuit and low power devices to avoid such incidences. However, the AC UPS is not suitable for the 315-kW compressor with inverter due to the harmonic distortion effect and low power factor. We built two sets of 400-kW DC UPS (also called DC Bank system) to keep two 315-kW compressor in full load operation at least 3 minutes when power sag or power cut-off in 2010. The DC Bank was parallel connect to the inverter, thus, will not affect the inverter operation when DC Bank need to maintenance or failure. This paper presents the configuration of DC Bank and the test of the system. Results show that when the inverter is operated at 242KW with main power cut off, the helium compressor is keeping stable operation for 257 seconds by DC Bank support.
|
|
|
TUP218 |
Design of a Liquid Helium Transfer System for the TPS Project |
1220 |
|
- H.H. Tsai, M.H. Chang, S.-H. Chang, W.-S. Chiou, F. Z. Hsiao, H.C. Li, M.-C. Lin, T.F. Lin, C.P. Liu, Ch. Wang
NSRRC, Hsinchu, Taiwan
|
|
|
The construction of the Taiwan Photon Source (TPS) storage ring is under way, to be completed in mid 2012. The new helium cryogenic system is provided from the Linde Company, to be installed after the TPS storage ring is completed. The super conducting radio frequency (SRF) cavities is needed to maintain the electron energy of storage ring and were operated at refrigeration mode such that the cold helium gas from the cavity cryostat is returned to the refrigerator. One distribution valve box and individual segments of multichannel transfer lines is required to supply the liquid helium and liquid nitrogen to the SRF cavities and recover the gas helium and gas nitrogen back to the cryogenic system. This paper is aimed to present the configuration and design features of the LHe transfer system. The heat load and pressure drop calculation of the transfer system was also presented.
|
|
|
WEOCS5 |
Experience of the Cryogenic System for Taiwan Light Source |
1466 |
|
- F. Z. Hsiao, C.-S. Hwang
NSRRC, Hsinchu, Taiwan
|
|
|
In Taiwan light source a superconductive cavity and five superconductive magnets are installed in the storage ring. The cryogenic system provides liquid helium and liquid nitrogen with stable pressure. Failure events occurred on the components such as expansion turbine, compressor, and frequency inverter during the past years. A supervision system was developed to monitor the status of the cryogenic system and an automatic call out system was built to notify the operators when abnormal condition appears. To shorten the interruption period of liquid helium supply, the dewar keeps stable and continuous supply of liquid helium and the recovery compressor collets the evaporated helium gas from the cryostat for cases of several hours shutdown of the cryogenic system. Humidity, cleanliness and helium leak tightness are items necessary to be well controlled before connecting new components or application devices to the cryogenic system. The matching between system cooling capacity and heat load is achieved via adjustment of turbine speed, precooling temperature, compressor speed, and heater power.
|
|
|
THP211 |
Design Features and Construction Progress of 500-Mhz Rf Systems for the Taiwan Photon Source |
2513 |
|
- Ch. Wang, L.-H. Chang, M.H. Chang, C.-T. Chen, L.J. Chen, F.-T. Chung, F. Z. Hsiao, M.-C. Lin, Y.-H. Lin, C.H. Lo, G.-H. Luo, M.H. Tsai, T.-T. Yang, M.-S. Yeh, T.-C. Yu
NSRRC, Hsinchu, Taiwan
- M.C. Lee
SSRF, Shanghai, People's Republic of China
|
|
|
The accelerator complex of the Taiwan Photon Source (TPS) consists of two 500-MHz RF systems: one RF system with KEKB-type single-cell SRF modules is used for the 3-GeV storage ring of circumference 518 m, and the other with five-cell Petra cavities at room temperature is for the concentric full-energy booster synchrotron. This overview of the construction of the 500-MHz RF systems for the TPS is presented with emphasis on our strategy to approach the expectation of highly reliable SRF operation of the TPS. How to complete the construction project on time, on budget and on performance is our unique concern.
|
|
|