Superconducting curved transport solenoid with dipole coils for charge selection of the muon beam

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 317; pp. 361 - 364
• Main Authors: Strasser, P., Ikedo, Y., Miyake, Y., Shimomura, K., Kawamura, N., Nishiyama, K., Makimura, S., Fujimori, H., Koda, A., Nakamura, J., Nagatomo, T., Adachi, T., Pant, A.D., Ogitsu, T., Makida, Y., Yoshida, M., Sasaki, K., Okamura, T., Ohhata, H., Nakamoto, T., Okada, R., Ohkubo, R., Yamamoto, A., Higemoto, W., Itoh, T.U., Ishida, K., Nakahara, K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2013
• Subjects: Charge; Charge separator; Coils; Construction materials; Curved; Curved solenoid; J-PARC; Muon; Muons; MUSE; Particle beams; Particle physics; Solenoids; Curved solenoid; J-PARC; Muon; Charge separator; MUSE
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2013.07.046

•Superconducting curved transport solenoid.•Muon charge selection by superimposed dipole field.•World strongest pulsed muon source. At the J-PARC Muon Science Facility (MUSE) the Super-Omega muon beamline is now under construction in the experimental hall No. 2 of the Materials and Life Science Facility building. Muons up to 45MeV/c will be extracted with a large acceptance solid angle to produce the world highest intensity pulsed muon beam. This beamline comprises three parts, a normal-conducting capture solenoid, a superconducting curved transport solenoid and an axial focusing solenoid. Since only solenoids are used, both surface μ+ and cloud μ− are extracted simultaneously. To accommodate future experiments that would only require either μ+ or μ− beam, two dipole coils located on the straight section of the curved solenoid provide the muon charge selection by directing one of the beam onto the solenoid inner-wall. The design parameters, the construction status and the initial beam commissioning are reported.