8th International symposium on Negative Ions, Beams and Sources - NIBS'22

Session

Oral session 8

5 Oct 2022, 10:40

Auditorium (Orto Botanico)

15. 120 mA Operation of J-PARC Cesiated RF-Driven Hˉ Ion Source

Akira UENO

05/10/2022, 10:40

18. Sources for high energy physics

Oral

In NIBS2020, the stable operation of the J-PARC cesiated RF-driven Hˉ ion source (IS) in a test-stand with a 65 keV 110 mA beam and a beam duty factor of 4.5 % (1 ms x 45 Hz), whose transverse emittances were measured to be suitable for the J-PARC radio-frequency quadrupole LINAC, was reported. In the operation, the beam intensity was limited only by the maximum IS terminal voltage of about 66...

66. Over 7200 hours commissioning of RF-driven negative hydrogen ion source developed at CSNS

Dr Weidong CHEN (Institute of High Energy Physics, Chinese Academy of Sciences)

05/10/2022, 11:10

18. Sources for high energy physics

Oral

The China spallation neutron source project Phase-II (CSNS-II) aims to deliver proton beam of 500 kW on the target. To accomplish this goal, an RF-driven negative hydrogen ion source was developed to replace the penning ion source used in CSNS-I. The RF-driven ion source has been put into commissioning on CSNS accelerator since Sept. 8th of 2021. And it was shut down on July 26th of 2022,...

24. Discoloration of RF antenna coil surface after long-term operation of J-PARC ion source

Dr Takanori SHIBATA (KEK)

05/10/2022, 11:40

18. Sources for high energy physics

Short oral

In J-PARC (Japan Proton Accelerator Research Complex) center, continuous operation duration of the Radio Frequency (RF) negative hydrogen ($\text{H}^-$) ion source equipped with the internal RF antenna coil is extended step by step in these 6 – 7 years for the goal to supply stable beam during the entire period of J-PARC user operation each year. From Nov. 2020 to Apr. 2021, the continuous ion...

50. Correlation H- beam properties to Cs-coverage

Jacques LETTRY (CERN)

05/10/2022, 12:00

18. Sources for high energy physics

Oral

A cesiated RF driven source delivers H- ion that, after stripping at the end of the 160 MeV H- linear injector, provides protons to CERN’s accelerator complex including LHC, where the protons reached a record energy of 6.8 TeV. During initial caesiation, the dual production mechanism of H- ions, via dissociative attachment of electron onto roto-vibrationally excited H2-molecules (volume) and...