TY - JOUR
T1 - A beam position fiber counter with scintillation fibers and multi-pixel photon counter for high intensity beam operation
AU - Honda, Ryotaro
AU - Miwa, K.
AU - Matsumoto, Y.
AU - Chiga, N.
AU - Hasegawa, S.
AU - Imai, K.
N1 - Funding Information:
The authors acknowledge the K1.8 beam line collaborators who supported our work during the beam time. This work was supported by JSPS KAKENHI Grant number 23684011 .
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Abstract A beam position fiber counter consisting of the scintillation fiber (Kuraray SCSF-78 M) and a multi-pixel photon counter (HPK S10362-11-100P) was developed in order to handle a 10 MHz secondary pion beam in the J-PARC E40 experiment. This counter was installed at the entrance of the beam line spectrometer at the K1.8 experimental area in J-PARC and used for the momentum reconstruction. In order to suppress the accidental background and reconstruct the beam momentum, a good timing resolution better than 0.8 ns (σ) and a good position resolution better than 200μm were simultaneously required for the counter. These requirements were well achieved by reading the 320 fibers with a diameter of 1 mm, which were arranged in a staggered position, with MPPC fiber by fiber. The signal induced from each MPPC was handled with an Extended Analogue SiPM Integrated ReadOut Chip (EASIROC) developed by Omega/IN2P3 in France. In addition, the timing of the discriminated signals from EASIROC was measured by a FPGA-based multi-hit TDC implemented into Spartan-6. Finally, we obtained the timing resolution of 0.68 ns (σ) and the position resolution of 190μm (σ) under the 9 MHz beam condition using a pion beam.
AB - Abstract A beam position fiber counter consisting of the scintillation fiber (Kuraray SCSF-78 M) and a multi-pixel photon counter (HPK S10362-11-100P) was developed in order to handle a 10 MHz secondary pion beam in the J-PARC E40 experiment. This counter was installed at the entrance of the beam line spectrometer at the K1.8 experimental area in J-PARC and used for the momentum reconstruction. In order to suppress the accidental background and reconstruct the beam momentum, a good timing resolution better than 0.8 ns (σ) and a good position resolution better than 200μm were simultaneously required for the counter. These requirements were well achieved by reading the 320 fibers with a diameter of 1 mm, which were arranged in a staggered position, with MPPC fiber by fiber. The signal induced from each MPPC was handled with an Extended Analogue SiPM Integrated ReadOut Chip (EASIROC) developed by Omega/IN2P3 in France. In addition, the timing of the discriminated signals from EASIROC was measured by a FPGA-based multi-hit TDC implemented into Spartan-6. Finally, we obtained the timing resolution of 0.68 ns (σ) and the position resolution of 190μm (σ) under the 9 MHz beam condition using a pion beam.
KW - MPPC
KW - Position detector
KW - Scintillation fiber
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U2 - 10.1016/j.nima.2014.11.084
DO - 10.1016/j.nima.2014.11.084
M3 - Article
AN - SCOPUS:84939976572
SN - 0168-9002
VL - 787
SP - 157
EP - 160
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 57243
ER -