title: Experimental evaluation of the response of micro-channel plate detector to ions with 10s of MeV energies.
abstract: The absolute calibration of a microchannel plate (MCP) assembly using a Thomson spectrometer for laser-driven ion beams is described. In order to obtain the response of the whole detection system to the particles' impact, a slotted solid state nuclear track detector (CR-39) was installed in front of the MCP to record the ions simultaneously on both detectors. The response of the MCP (counts/particles) was measured for 5-58 MeV carbon ions and for protons in the energy range 2-17.3 MeV. The response of the MCP detector is non-trivial when the stopping range of particles becomes larger than the thickness of the detector. Protons with energies E ≳ 10 MeV are energetic enough that they can pass through the MCP detector. Quantitative analysis of the pits formed in CR-39 and the signal generated in the MCP allowed to determine the MCP response to particles in this energy range. Moreover, a theoretical model allows to predict the response of MCP at even higher proton energies. This suggests that in this regime the MCP response is a slowly decreasing function of energy, consistently with the decrease of the deposited energy. These calibration data will enable particle spectra to be obtained in absolute terms over a broad energy range.
authors: Center for Relativistic Laser Science, Institute of Basic Science (IBS), Gwangju 61005, South Korea.
authors: Tae Won
authors: TW
authors: Jeong
authors: Center for Relativistic Laser Science, Institute of Basic Science (IBS), Gwangju 61005, South Korea.
authors: P K
authors: PK
authors: Singh
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: C
authors: C
authors: Scullion
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: H
authors: H
authors: Ahmed
authors: Center for Relativistic Laser Science, Institute of Basic Science (IBS), Gwangju 61005, South Korea.
authors: K F
authors: KF
authors: Kakolee
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: P
authors: P
authors: Hadjisolomou
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: A
authors: A
authors: Alejo
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: S
authors: S
authors: Kar
authors: School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, United Kingdom.
authors: M
authors: M
authors: Borghesi
authors: Center for Relativistic Laser Science, Institute of Basic Science (IBS), Gwangju 61005, South Korea.
authors: S
authors: S
authors: Ter-Avetisyan