Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Hayashi, Naoki; Hatakeyama, Shuichiro; Harada, Hiroyuki; Hotchi, Hideaki; Takano, Jumpei*; Tejima, Masaki*; Toyama, Takeshi*
Proceedings of 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2010) (Internet), p.57 - 61, 2010/09
The Beam Based Alignment (BBA) of the BPM is inevitable for precise and absolute beam position measurements. Even though careful fabrication and installation of the BPM detector, it has to be calibrated by using the beam. Usually, it requires that the individual quadrupole magnet is able to be controlled. However, it is not always that case. In addition, scanning over the all BPM is time consuming procedure. The BBA method under coupled QM environment would help to reduce time for calibration. It presents general formula and experiences at J-PARC RCS and parts of results are compared with the ordinal method at J-PARC MR.
Hotchi, Hideaki; J-PARC Commissioning Team
Proceedings of 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2010) (Internet), p.276 - 280, 2010/09
The J-PARC consists of linac, 3-GeV RCS (Rapid Cycling Synchrotron), 50-GeV MR (Main Ring synchrotron) and three experimental facilities, the MLF (Material and Life science experimental Facility), the hadron experimental facility and the neutrino beam line. The J-PARC started the user operation with 4 kW output beam power in December 2008. Via the underlying beam studies with such a low intensity beam, the output beam power from the RCS has been increased to 120 kW since December 2009 and recently the MR has started 50 kW beam delivery to the neutrino beam line. In this paper the recent progress and experience in the course of our beam power ramp-up scenario such as beam loss control, machine activation, availability will be presented.
Shobuda, Yoshihiro; Chin, Y. H.*; Takata, Koji*
Proceedings of 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2010) (Internet), p.348 - 352, 2010/09
no abstracts in English
Saha, P. K.; J-PARC Team*
Proceedings of 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2010) (Internet), p.324 - 328, 2010/09
Yamamoto, Kazami
no journal, ,
The accelerator facilities in J-PARC have been commissioned since January 2007. According to the progress of beam commissioning and construction of accelerators and experimental facilities, operational beam power becomes larger. Now the RCS produces 120 kW beam to MLF and the MR provides 50 kW beam to Neutrino target. In such high intensity operation, Linac ACS section, RCS injection and arc section, MR collimator section become slightly higher residual dose area. We try to improve these losses before it is too late.
