A vacuum tolerant high voltage system with a low noise and low power Cockcroft-Walton photomultiplier base

T. Masuda, E. Iwai, N. Kawasaki, E. J. Kim, T. K. Komatsubara, J. W. Lee, G. Y. Lim, Y. Maeda, D. Naito, H. Nanjo, T. Nomura, Y. D. Ri, N. Sasao, K. Sato, S. Seki, K. Shiomi, Y. Sugiyama, M. Togawa, H. Watanabe, T. Yamanaka

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Abstract

We developed a high voltage system for the electromagnetic calorimeter of the KOTO detector. The system is designed around a low noise, low power Cockcroft-Walton (CW) photomultiplier tube base with a high gain preamplifier. The low power makes it suitable for operations in vacuum. The low noise and high gain allow detecting signals in the 1 MeV range. We achieved a final noise level below 180μVrms for a preamplifier gain of more than 40. A vacuum tolerant control system for the CW bases power distribution was also designed. This system is able to control and monitor the high voltage of each individual base.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume746
DOIs
Publication statusPublished - May 11 2014

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Keywords

  • CW base
  • Calorimeter
  • J-PARC
  • KOTO
  • Photomultiplier tube

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Masuda, T., Iwai, E., Kawasaki, N., Kim, E. J., Komatsubara, T. K., Lee, J. W., Lim, G. Y., Maeda, Y., Naito, D., Nanjo, H., Nomura, T., Ri, Y. D., Sasao, N., Sato, K., Seki, S., Shiomi, K., Sugiyama, Y., Togawa, M., Watanabe, H., & Yamanaka, T. (2014). A vacuum tolerant high voltage system with a low noise and low power Cockcroft-Walton photomultiplier base. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 746, 11-19. https://doi.org/10.1016/j.nima.2014.02.007