Author: Etxeberria, J.
Paper Title Page
TUPP032 J-PARC Test of ESS Beam on Target Diagnostics Prototypes Aperture Monitor and GRID 382
 
  • C.A. Thomas, J. Etxeberria, H. Kocevar, J.P.S. Martins, T.J. Shea
    ESS, Lund, Sweden
  • A.J. Johansson, M. Törmänen
    Lund University, Lund, Sweden
  • S.I. Meigo, M. Ooi
    JAEA/J-PARC, Tokai-mura, Japan
  • H. Niu, B. Zhang
    IMP/CAS, Lanzhou, People’s Republic of China
 
  The ESS high power beam will be delivered to the spallation target with high degree of control. To this end, we have designed a suite of instruments which provide measurement of the beam characteristics in a drift space a few meters from the target. Two of these instruments, the APTerure Monitor (APTM) and the GRID are presented. The APTM is designed to measure the fraction of beam going through the defined aperture; its time acquisition ranges from intra-pulse at µs sampling rate to many pulses over seconds. The GRID measures the projected horizontal and vertical profiles, sampling the pulse at 1MHz. A prototype of these two instruments has been designed and installed in the 3NBT dump line of J-PARC. They are designed to test functionality of these instruments in a similar environment as ESS. The 3NBT Dump line at J-PARC presents such an environment. In the second part of the paper we report the results and the measurements performed to test the prototypes. Before concluding we will discuss the results and propose improvements to the instruments final design.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP032  
About • paper received ※ 04 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
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WECO04 Commissioning of the Non-invasive Profile Monitors for the ESS LEBT 487
 
  • C.A. Thomas, J. Etxeberria, S. Haghtalab, H. Kocevar, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian
    ESS, Lund, Sweden
 
  In the Low Energy Beam Transport (LEBT) of the European Spallation Source (ESS) Linac, a specific Non-invasive Profile Monitor (NPM) has been designed to primarily monitor beam position monitor with 100 µm accuracy, and in addition enable beam profile and size measurement. We present the first measurement results using NPM during the commissioning of the LEBT. The measurement results conclude the beam position as well as the angle of the beam. The performance of the measurement is discussed and compared to the required accuracy for the position measurement. In addition, the profile of the beam along the propagation axis is reported, as measured for part or the full pulse transported in the LEBT. The fidelity of the reported profile will be discussed as function of the system sensitivity and image signal to noise ratio.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO04  
About • paper received ※ 04 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)