Makoto Toda

  • Citations Per Year
Learn More
Arabidopsis (Arabidopsis thaliana) GOLDEN2-LIKE (GLK) transcription factors promote chloroplast biogenesis by regulating the expression of photosynthesis-related genes. Arabidopsis GLK1 is also known to participate in retrograde signaling from chloroplasts to the nucleus. To elucidate the mechanism by which GLK1 is regulated in response to plastid signals,(More)
A high gradient cavity(HGC) using high permeability magnetic alloy (MA) cores has been developed at KEK for the JHF(Japan Hadron Facility) proton synchrotrons. In this paper, we describe two types of push-pull amplifiers to drive the cavity, which were constructed for verifying the cavity performance. An accelerating voltage of 20kV across the gap of the(More)
A description of the RF system and measurements of some longitudinal phenomena of the KEK Main Ring are presented. The beam loss at the phase transition has been reduced by the improvement of the radial position detector and by the stabilization of quadrupole oscillations. The debunching for slow beam extraction is done by two successive frequency jumps(More)
Very high field-gradient has become available by a new Magnetic Alloy (MA)-loaded cavity developed for high intensity proton synchrotrons. The available RF voltage per core is ten times larger than that of the ordinary ferrite core. The maximum voltage of 20 kV has been achieved by the High-Field Gradient Cavity(HGC) of 40 cm in length[1]. Because the(More)
We have performed particle tracking simulation of J- PARC RCS to study the synchronization process. A frequency offset is added to the original rf frequency pattern to shift the bunch center, under the condition that the offset value should be 'adiabatic' with respect to the synchrotron motion. Since the synchrotron frequency of the J-PARC RCS is(More)
Y. Arakita, K. Ebihara, E. Ezura, G. Horikoshi, T. Ieiri, Z. Igarashi, T. Inagaki, H. Ishii, H. Ishimaru, T. Kawakubo, Y. Kimura, I. Komada, M. Kondo, T. Kubo, K. Kudo, M. Kumada T. Kurosawa, S. Mitsunobu, Y. Miyahara, Y. Mizumachi, H. Mizuno, K. Muto, H. Nakanishi H. Sasaki, K. Satoh, S. Shibata, H. Someya, K. Takata, S. Takeda, K. Takikawa, S. Tazawa M.(More)
The KEK booster synchrotron is a rapid-cycling machine with a repetition rate of 20 Hz. The RF system has been designed for accelerating the proton beam injected at 20 MeV up to its final energy of 500 MeV. The booster succeeded in accelerating 8 x 1010 protons/ pulse to the designed energy on Dec. 12, 1974. Since then the beam intensity has been steadily(More)
In the design of the RF system of the JHF (Japan Hadron Facility) proton synchrotrons, it is very important to find a magnetic core to which satisfies the required condition of the JHF accelerators[1]. Ferrite cores are usually used for the magnetic core of the proton synchrotron, however there are some problems. Generally, some ferrite cores have(More)
The rapid cycling synchrotron (RCS) radio frequency accelerating systems have been prepared for the beam commissioning scheduled in the middle of September 2007. Installations of cavities, power supplies and amplifiers were carried out. Also, the systems have been checked for the combined operations. For the main synchrotron (50 GeV-MR) accelerating(More)