Scintillating Fiber Detector for the Beam Loss Proton Measurements at J-PARC Linac

Jun 4, 2014, 12:20 PM
Adminstratiezaal (Beurs van Berlage)


Beurs van Berlage

Oral Sensors: 1e) Novel technologies I.e Novel Technologies


Konstantinova Olga (KEK)


In the J-PARC linac, due to its high intensity H- beam, significant beam loss has been observed at the downstream straight beam line section called ACS (Annular-Coupled Structure linac). The loss is mainly due to a proton which is produced due to double electron stripping of the H^- beam by the residual gas inside the beam pipe, and the titanium beam pipe. We have developed a detector system consisting of 8 planes of scintillating fiber hodoscopes in order to measure proton tracks emitted from the beam pipe of the J-PARC linac. The system measures positions of the charged particle tracks in a small solid angle, and also measures the time-of-flight of each particle. We show angular and energy distribututions of the proton tracks measured in 2012-2013. We also show comparison of the results with simulation.

Primary author


Mr Akihiko Miura (Japan Atomic Energy Agency) Hiroyuki Sako (Japan Atomic Research Agency) Dr Tomofumi Maruta (KEK)

Presentation materials