ASACUSA-MUSASHI group focuses on spectroscopy of cold antihydrogen atoms and atomic collision process in low energy region. These researches are going on at CERN AD/ELENA.
Cusp trap We proposed a cusp trap in which antihydrogen Rydberg states may not only be synthesized at low temperatures but also extract them as a beam for ground state hyperfine splitting measurement. A theoretical calculation also shows most of antihydrogen atoms to cascade down to the ground state in CUSP trap for subsequent use in a variety of experiments. The cusp trap consists of a magnetic quadrupole (cusp) field formed by a pair of superconducting solenoids (antihelmholtz coil) together with an electrostatic field.Read more...
Compact Positron Trap We have developed a compact positron accumulator based on Nitrogen gas-buffer cooling scheme with a specially designed multiple ring electrode trap and yet another superconducting solenoid.
References H.Imao, K.Michishio, Y.Kanai, N.Kuroda, Y.Enomoto, H.Higaki, K.Kira, A.Mohri, H.A.Torii, Y.Nagata, C.Kim, Y.Matsuda2, Y.Nagashima, and Y.Yamazaki. “Positron accumulation and manipulation for antihydrogen synthesis” J. Phys. Conf. Ser., 255 012018, 2009 Read more...
MUSASHI — “Monoenergetic Ultra Slow Antiproton Source for High-precision Investigations” Making ultra-slow antiproton beams at CERN AD/ELENA The preparation of large samples of antiprotons at extremely low energy is an important step on the road to synthesizing antihydrogen (pe+) and antiprotonic atoms (pA+).
The CERN Antiproton Decelerator (AD) decelerates antiprotons with GeV-scale kinetic energy to 5.3 MeV, and re-ejects them every 90-120 sec in 100 ns long pulses, containing some 3 x 10^7 particles.Read more...
