CAMS/LLNL ion source efficiency revisited

External Ion Injection into an EBIS source: Efficiency Measurements

A concept for a charge state multiplier, to be used for the production of energetic radioactive ion beams based on the ISOL+post-accelerator system, is discussed. The charge state breeder implies external ion injection into an Electron Beam Ion Source (EBIS). The total efficiency, measured by injecting a low-energy nitrogen (Q=1+ ) beam, reached 14.5% and was essentially constant for confinemen...

Power efficiency improvements with the radio frequency H⁻ ion source.

CW 13.56 MHz radio frequency-driven H(-) ion source is under development at the University of Jyväskylä for replacing an existing filament-driven ion source at the MCC30/15 cyclotron. Previously, production of 1 mA H(-) beam, which is the target intensity of the ion source, has been reported at 3 kW of RF power. The original ion source front plate with an adjustable electromagnet based filter f...

Beef Cow Efficiency- Revisited

Source matching problems revisited

The source matching problem is to find the minimax codes that minimize the maximum redundancies over classes of sources where relative entropy (cross entropy, discrimination information) is adopted as a criterion to measure the redundancy. The convergence of a simple approach different from Davisson and Leon-Garcia’s algorithm for finding such minimax codes is presented and shown. This approach...

The Hidden Ion Population - Revisited

Satellite potentials in the outer plasmasphere range from near zero to +5 to +10 V. Under such conditions ion measurements may not include the low energy core of the plasma population. In eclipse, the photoelectron current drops to zero, and the spacecraft potential can drop to near zero volts. In regions where the ambient plasma density is below 100 cm, previously unobserved portions of the am...