Ramping up the Spallation Neutron Source beam power with the H− source using 0 mg Cs/day

Stöckli, M. P.; Han, Binghong; Murray, S. N.; Pennisi, Terry R; Santana, Manuel; Welton, R. F.

doi:10.1063/1.3325085

Cited by 57 publications

(30 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. We used the internal antenna developed at the Spallation Neutron Source (SNS) [2]. The ion source comprises a plasma chamber, a 50 kV isolation ceramics insulator, and a large vacuum chamber with two turbomolecular pumps (TMPs) of 1500 l/s for differential pumping.…”

Section: Rf-driven Ion Sourcementioning

confidence: 99%

Development Status of Ion Source at J-PARC Linac Test Stand

Yamazaki

Takagi

Ikegami

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

View full text Add to dashboard Cite

The Japan Proton Accelerator Research Complex (J-PARC) linac power upgrade program is now in progress in parallel with user operation. To realize a nominal performance of 1 MW at 3 GeV Rapid Cycling Synchrotron and 0.75 MW at the Main Ring synchrotron, we need to upgrade the peak beam current (50 mA) of the linac. For the upgrade program, we are testing a new front-end system, which comprises a cesiated RF-driven H − ion source and a new radio -frequency quadrupole linac (RFQ). The H − ion source was developed to satisfy the J-PARC upgrade requirements of an H − ion-beam current of 60 mA and a lifetime of more than 50 days. On February 6, 2014, the first 50 mA H − beams were accelerated by the RFQ during a beam test. To demonstrate the performance of the ion source before its installation in the summer of 2014, we tested the long-term stability through continuous beam operation, which included estimating the lifetime of the RF antenna and evaluating the cesium consumption.

show abstract

Section: Rf-driven Ion Sourcementioning

confidence: 99%

Development Status of Ion Source at J-PARC Linac Test Stand

Yamazaki

Takagi

Ikegami

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

View full text Add to dashboard Cite

show abstract

“…Thus, we have newly developed a cesiated RF-driven ion source to satisfy the Linac upgrade requirements of 50 mA [31]. In the ion source, the source plasma is produced by a 2MHz RF discharge using an internal antenna that was developed at Spallation Neutron Source (SNS) at Oak Ridge National Laboratory [32]. New RFQ is optimized for the beam current of 50mA [33].…”

Section: Linacmentioning

confidence: 99%

Path to 1-MW at J-PARC Rapid Cycling Synchrotron

Yamamoto¹,

Yamamoto²,

Morishita³

et al. 2017

ujpa

View full text Add to dashboard Cite

The accelerator system at Japan Proton Accelerator Research Complex (J-PARC) has been operational since May 2008 and has mainly been used to perform physics experiments. The accelerator system consists of a Linac, a Rapid Cycling Synchrotron (RCS), and a Main Ring Synchrotron. The originally designed RCS injection energy is 400MeV, but the first operation started at 181MeV. New acceleration cavities were installed in J-PARC Linac during the summer shutdown of 2013, and user operation by the Material and Life science Facility (MLF) at the injection energy of 400MeV was started from February 2014. Post beam commissioning of 400MeV injection energy, beam loss was small enough, and we established 300kW continuous operation. Subsequently, the peak current of the Linac was increased from 30mA to 50mA. This upgrade enabled us to try 1-MW beam acceleration. Finally, after some additional improvements, we successfully accelerated 1-MW equivalent protons.

show abstract

“…Accordingly, the required ~50 mA H -beams and the ~6% duty factor in SNS are significant challenges. These are met with the LBNL designed and built H -source [2], which continues to be improved [3][4][5][6][7][8]. Briefly, the cesium-enhanced, multicusp ion source has a 2.5 turn antenna inside the plasma chamber as seen in Fig.…”

Section: Introductionmentioning

confidence: 99%