K1.1BR BeamLine

K1.1BR is a secondary beam lime which transports charged particles (mainly kaons) produced in the proton reaction in the metal target.


K1.1BR is a secondary beam line installed in the south area of the J-PARC Hadron Experimental Hall and is in operation since 2010. This beam line transports the beams of charged particle such as pion, kaon and anti-proton produced in the primary proton reaction in the metal target to the experimental area with the help of electro-magnets. Various particle and nuclear physics experiments are performed with these beams. By using an electro-static separator a desired particle beam can be selectively transported. The beam line has a common upstream section with K1.1, and branched to the K1.1BR experimental area with a deflecting magnet. The maximum beam momentum of this low-momentum beam line is 1 GeV/c. Currently an experiment to search for violation of lepton universality (E36) is being prepared. Also various test experiments are performed.

Related WEB site


Related research group

Study of hadron beam dynamics

Related Facility