10th International Symposium on Negative Ions, Beams and Sources - NIBS'26

Session

S3: Chairperson - Robert Welton, SNS-ORNL

Sep 21, 2026, 2:00 PM

Conference Room (Prestige Lakeside Resort Nelson)

39. H- Source Developments and Operation at CERN

Jean-Baptiste Lallement (CERN)

9/21/26, 2:00 PM

Invited

The Linac4 H⁻ ion source is a critical element of CERN’s operations, directly affecting both accelerator performance and its broad user base. As the sole injector particle source, its reliability and efficiency are essential to the stability of the entire proton accelerator chain and the physics programs it enables. This paper presents an overview of the system, drawing on six years of...

30. Ion Source Development for AMS at WHOI

Dr Mark Roberts (Woods Hole Oceanographic Institution)

9/21/26, 2:25 PM

Invited

Accelerator mass spectrometry (AMS) is a sensitive technique for counting single atoms. The technique was developed in nuclear physics laboratories in the late 1970s for $^{14}$C, and subsequently extended to other isotopes, including $^{10}$Be, $^{36}$Cl, and $^{129}$I. In general, the AMS method employs a positive high-voltage tandem accelerator to accelerate negative ions. Almost...

34. Reliable long-life Operations and Record High beam current Demonstration of the H⁻ ion source at SNS

Dr Baoxi Han (Oak Ridge National Laboratory)

9/21/26, 2:50 PM

Invited

The ion source utilized in the SNS accelerator complex is an RF‑driven, multicusp‑confined, Cs‑enhanced H⁻ source. It is presently operated at approximately 50 mA of H⁻ beam current (measured at the LEBT exit) with a 6% duty-factor (1.0 ms, 60 Hz), supporting the SNS proton beam power on target near 2.0 MW. Producing this beam current typically requires about 50 kW of RF power for the ion...