English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

As the main $H^{-}$ ion source for the accelerator complex, magnetron ionsources have been used at Fermilab since the 1970s. At the offline test stand,new R&D is carried out to develop and upgrade the present magnetron-typesources of $H^{-}$ ions of up to 80 mA and 35 keV beam energy in the context ofthe Proton Improvement Plan. The aim of this plan is to provide high-powerproton beams for the experiments at FNAL. In order to reduce the amount oftuning and monitoring of these ion sources, a new electronic system consistingof a current-regulated arc discharge modulator allow the ion source to run at aconstant arc current for improved beam output and operation. A solenoid-typegas valve feeds $H_{2}$ gas into the source precisely and independently ofambient temperature. This summary will cover several studies and design changesthat have been tested and will eventually be implemented on the operationalmagnetron sources at Fermilab. Innovative results for this type of ion sourceinclude cathode geometries, solenoid gas valves, current controlled arc pulser,cesium boiler redesign, gas mixtures of hydrogen and nitrogen, and duty factorreduction, with the aim to improve source lifetime, stability, and reducing theamount of tuning needed. In this summary, I will highlight the advances made inion sources at Fermilab and will outline the directions of the continuing R&Deffort.

Implementation of Design Changes Towards a More Reliable, Hands-off Magnetron Ion Source