TY  - CONF
AU  - Sue, Y.
AU  - Futatsukawa, K.
AU  - Hasegawa, K.
AU  - Iijima, T.
AU  - Iinuma, H.
AU  - Inami, K.
AU  - Ishida, K.
AU  - Kawamura, N.
AU  - Kitamura, R.
AU  - Kondo, Y.
AU  - Mibe, T.
AU  - Miyake, Y.
AU  - Morishita, T.
AU  - Nakazawa, Y.
AU  - Otani, M.
AU  - Saito, N.
AU  - Takeuchi, Y.
AU  - Ushizawa, T.
AU  - Yamazaki, T.
AU  - Yasuda, H.Y.
AU  - Yotsuzuka, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - A Bunch Structure Measurement of Muons Accelerated by RFQ Using a Longitudinal Beam-Profile Monitor With High Time Resolution
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - J-PARC E34 experiment intends to measure the anomalous magnetic moment and electric dipole moment of muon precisely by a different way from the previous experiment. In this experiment, a low-emittance muon beam is provided using the muons with the thermal energy and the four-stage linac. The demonstration of the first muon RF acceleration with an RFQ linac was conducted and the transverse profile of the accelerated muons was measured last year. As one of the remaining issues for the beam-diagnostic system, the longitudinal beam profile after the RFQ should be measured to match the profile to the designed acceptance of the subsequent accelerator. For this purpose, the new longitudinal beam monitor using the micro-channel plate is under development. The time resolution aims to be around 30 to 40 ps corresponding to 1 % of a period of an operation frequency of the accelerator, which is 324 MHz. On November 2018, the bunch structure of accelerated muons of 89 keV with the RFQ was measured using this monitor at the J-PARC MLF. The latest analysis result of this measurement will be reported in this poster.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 37
EP  - 40
KW  - rfq
KW  - experiment
KW  - linac
KW  - background
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOZZPLM2
UR  - http://jacow.org/ipac2019/papers/mozzplm2.pdf
ER  - 

TY  - CONF
AU  - Otani, M.
AU  - Fukao, Y.
AU  - Futatsukawa, K.
AU  - Hasegawa, K.
AU  - Iijima, T.
AU  - Iinuma, H.
AU  - Inami, K.
AU  - Ishida, K.
AU  - Kawamura, N.
AU  - Kitamura, R.
AU  - Kondo, Y.
AU  - Mibe, T.
AU  - Miyake, Y.
AU  - Morishita, T.
AU  - Nakazawa, Y.
AU  - Saito, N.
AU  - Shimomura, K.
AU  - Sue, Y.
AU  - Yamazaki, T.
AU  - Yasuda, H.Y.
AU  - Yotsuzuka, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Negative Muonium Ion Production With a C12A7 Electride Film
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Negative muonium ion production is one of methods to cool muons. Since its discovery in 1987 by interactions of muons with a metal foil, it has been discussed that the production efficiency would be improved using a low-work function material. C12A7 (12CaO·7AlO3) was a well-known insulator as a constituent of alumina cement, but was recently confirmed to exhibit electric conductivity by electron doping. The C12A7 electride has lower work function (2.9 eV) and it was reported that nearly the same negative current signal as that with a bi-alkali material coated metal were observed in H⁻ formation. In this poster, the negative muonium production measurement with a Al foil and C12A7 electride film will be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1175
EP  - 1178
KW  - target
KW  - experiment
KW  - positron
KW  - acceleration
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUXXPLS2
UR  - http://jacow.org/ipac2019/papers/tuxxpls2.pdf
ER  -