Author: Wang, G.M.
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TUPOB50 Beam-Induced Heating of the Kicker Ceramics Chambers at NSLS-II 599
 
  • A. Blednykh, B. Bacha, G. Bassi, G. Ganetis, C. Hetzel, H.-C. Hseuh, T.V. Shaftan, V.V. Smaluk, G.M. Wang
    BNL, Upton, Long Island, New York, USA
  
  Funding: This work was supported by Department of Energy contract DE-AC02-98CH10886.
First experience with the beam-induced heating of the ceramics chambers in the NSLS-II storage ring has been discussed. Total five ceramics chambers are considered to be replaced due to overheating concern during of upcoming Iav=500mA operations. The air cooling fans has been installed as a temporarily solution to remove heat. 		 
poster icon Poster TUPOB50 [1.629 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB50  
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WEPOB65 Experiments of Lossless Crossing - Resonance With Tune Modulation by Synchrotron Oscillations 1036
 
  • G.M. Wang, B. Holub, Y. Li, J. Rose, T.V. Shaftan, V.V. Smaluk
    BNL, Upton, Long Island, New York, USA
  
  It had become a standard practice to constrain particle's tune footprint while designing the storage ring lattice so that the tunes fit between harmful resonances that limit ring dynamic aperture (DA). However, in recent ultra-bright light source design, the nonlinearities of storage ring lattices are much enhanced as compared with the 3rd generation light source one. It is becoming more and more difficult to keep the off-momentum tune footprint confined and even more, the solution cannot be found to confine off-energy tune footprint in certain cases. The questions have been asked whether crossing of a resonance stopband from off-momentum particle will necessarily lead to particle loss. In NSLS-II, we modified the lattice working point to mimic machine tune footprint crossing half integer with beam synchrotron oscillation excitation and demonstrated that beam can cross a resonance without loss with control of stopband width and high order chromaticity.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB65  
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WEPOB66 NSLS-II Post Mortem Function Development and Data Analysis of Beam Dump 1039
 
  • G.M. Wang, W.X. Cheng, J. Choi, L. Doom, K. Ha, T.V. Shaftan, R.M. Smith, J. Tagger, Y. Tian
    BNL, Upton, Long Island, New York, USA
  • R.V. Madelon
    University of Orleans, Orleans, France
  
  The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. The storage ring was commissioned in 2014 and transitioned to routine operations in the December of the same year. At this point the facility hosts 14 operating beam lines with beam current upto 250 mA. During beamline operation, various sources (protection system or subsystem malfunction) may cause beam dump. To identify the beam trip sources and improve the operation reliability, post mortem function was developed in NSLS-II to capture the sub-systems status and beam information prior and after beam dump, including RF system, power supply, BPMs and active interlock system. Most of the trip events have been identified and related source was improved. In this paper, we'll present the post mortem function and data application.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB66  
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