Keyword: alignment
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WEP2PO024 Resonance Stop-bands Compensation at Booster Ring of HIAF resonance, injection, betatron, coupling 315
 
  • J. Li, J.C. Yang
    IMP/CAS, Lanzhou, People's Republic of China
 
  Booster Ring (BRing) of the new approved High Intensity heavy-ion Accelerator Facility (HIAF) in China is designed to stack 0.3-1.0·1011 number of 238U35+ ions by painting injection and deliver over such intensity beam in extraction. However, depressed tune spread caused by space charge effect crosses the low-order resonance stop-bands after bunching the storage beam. To keep a low beam loss during crossing, stop-band compensation scheme is proposed covering the whole process of RF capture and early acceleration.  
poster icon Poster WEP2PO024 [1.218 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO024  
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THA2WD03 Real-Time Measurement of Fluctuations of Building Floor and Installed Devices of Large Scientific Equipment survey, FEL, real-time, operation 362
 
  • H. J. Choi, J.H. Han, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  Several parts that comprise the large scientific equipment should be installed and operated at precise three-dimensional location coordinates X, Y, and Z through survey and alignment to ensure their optimal performance. As time goes by, however, the ground goes through uplift and subsidence, which consequently changes the coordinates of installed components and leads to alignment errors ΔX, ΔY, and ΔZ. As a result, the system parameters change, and the performance of the large scientific equipment deteriorates accordingly. Measuring the change in locations of systems comprising the large scientific equipment in real time would make it possible to predict alignment errors, locate any region with greater changes, realign components in the region fast, and shorten the time of survey and realignment. For this purpose, a WPS's (wire position sensor) are installed in undulator section and a HLS's (hydrostatic leveling sensor) are installed in PAL-XFEL building. This paper is designed to introduce installation status of HLS and WPS, operation status.  
slides icon Slides THA2WD03 [21.186 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THA2WD03  
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