Proton linear energy transfer measurement using Emulsion Cloud Chamber

Jae Ik Shin, Seyjoon Park, Haksoo Kim, Meyoung Kim, Chiyoung Jeong, Sungkoo Cho, Young Kyung Lim, Dongho Shin, Se Byeong Lee, Kunihiro Morishima, Naotaka Naganawa, Osamu Sato, Jungwon Kwak, Sung Hyun Kim, Jung Sook Cho, Jung Keun Ahn, Ji Hyun Kim, Chun Sil Yoon, Sebastien Incerti

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Abstract This study proposes to determine the correlation between the Volume Pulse Height (VPH) measured by nuclear emulsion and Linear Energy Transfer (LET) calculated by Monte Carlo simulation based on Geant4. The nuclear emulsion was irradiated at the National Cancer Center (NCC) with a therapeutic proton beam and was installed at 5.2 m distance from the beam nozzle structure with various thicknesses of water-equivalent material (PMMA) blocks to position with specific positions along the Bragg curve. After the beam exposure and development of the emulsion films, the films were scanned by S-UTS developed in Nagoya University. The proton tracks in the scanned films were reconstructed using the 'NETSCAN' method. Through this procedure, the VPH can be derived from each reconstructed proton track at each position along the Bragg curve. The VPH value indicates the magnitude of energy loss in proton track. By comparison with the simulation results obtained using Geant4, we found the correlation between the LET calculated by Monte Carlo simulation and the VPH measured by the nuclear emulsion.

Original languageEnglish
Article number60809
Pages (from-to)201-208
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Publication statusPublished - 2015 Apr 15

Bibliographical note

Funding Information:
This work was partly supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (National Research Foundation of Korea – 2012 – K1A3A1A21 – 2010-0026071). This study was partly supported also by funds from a research project of the National Cancer Center of Korea (Nos. NCC-1210210 ). This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MEST ) (Nuclear Energy Research Infrastructure Program, 2011-0019054). Also we thank the International Associated Laboratory “France-Korea Particle Physics and e-science Laboratory” (FKPPL) for its regular support.

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.


  • Bragg curve
  • Linear Energy Transfer (LET)
  • Nuclear emulsion
  • Proton therapy
  • Volume Pulse Height (VPH)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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