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Three-dimensional measurement of a proton beam profile at KOMAC with a scintillating fiber detector

Authors
Kim, S. H.Lee, J. W.Jung, W. S.Ahn, J. K.Jung, M. H.Kim, Y. J.
Issue Date
1-7월-2022
Publisher
ELSEVIER
Keywords
Beam profile monitor; Scintillating fiber; Flash ADC; KOMAC
Citation
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.1034
Indexed
SCIE
SCOPUS
Journal Title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume
1034
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/143363
DOI
10.1016/j.nima.2022.166832
ISSN
0168-9002
Abstract
The time structure of proton beam pulses has been measured using a three-dimensional beam profile monitor (BPM) with scintillating fibers at the Korea Mull-purpose Accelerator Complex (KOMAC). The BPM measured the spatial and temporal distributions of 100-mu s-long macropulses at the 20-MeV and 100-MeV proton beamlines. The scintillating fiber BPM covers an effective area of 120(x) x 120(y) mm(2), with 12 fibers separated by 10 mm in each direction. Signals from 1-mm-diameter fibers were read out with a 1.3 x 1.3 mm(2) mull-pixel photon counter (MPPC) and fed into a 500-MHz flash ADC. We successfully measured the beam profile and its time structure at the same time. Using multi-layered collimators, the beam intensity could be sufficiently reduced so that the BPM could measure individual beam particles.
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