Upgrade of the machine protection system toward 1.3 MW operation of the j-PARC neutrino beamline

K. Sakashita, M. Friend, K. Nakayoshi, S. Yamasu, Y. Koshio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The machine protection system (MPS) is one of the essential components to realize safe operation of the J-PARC neutrino beamline, where a high intensity neutrino beam for the T2K long baseline neutrino oscillation experiment is generated by striking 30 GeV protons on a graphite target. The proton beam is extracted from the J-PARC main ring proton synchrotron (MR) into the primary beamline. The beamline is currently operated with 485 kW MR beam power. The MR beam power is planned to be upgraded to 1.3 MW. The neutrino production target could be damaged if the high intensity beam hits off-centered on the target, due to non-uniform thermal stress. Therefore, in order to protect the target, it is important to immediately stop the beam when the beam orbit is shifted. A new FPGA-based interlock module, with which the beam profile is calculated in real time, was recently developed and commissioned. This module reads out signals from a titanium-strip-based secondary emission profile monitor (SSEM) which is placed in the primary beamline. An overview of the upgrade plan of the MPS system and the results of an initial evaluation test of the new interlock module will be discussed.

Original languageEnglish
Title of host publicationProceedings of the 7th International Beam Instrumentation Conference, IBIC 2018
PublisherJoint Accelerator Conferences Website (JACoW)
Pages18-21
Number of pages4
ISBN (Electronic)9783954502011
DOIs
Publication statusPublished - Nov 2018
Event7th International Beam Instrumentation Conference, IBIC 2018 - Shanghai, China
Duration: Sep 9 2018Sep 13 2018

Publication series

NameProceedings of the 7th International Beam Instrumentation Conference, IBIC 2018

Conference

Conference7th International Beam Instrumentation Conference, IBIC 2018
CountryChina
CityShanghai
Period9/9/189/13/18

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ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Sakashita, K., Friend, M., Nakayoshi, K., Yamasu, S., & Koshio, Y. (2018). Upgrade of the machine protection system toward 1.3 MW operation of the j-PARC neutrino beamline. In Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018 (pp. 18-21). (Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018). Joint Accelerator Conferences Website (JACoW). https://doi.org/10.18429/JACoW-IBIC2018-moob04