Ion source development for the proposed FNAL 750-keV injector upgrade

TL;DR

This paper discusses the development of a new ion source for FNAL's 750-keV injector upgrade, aiming to replace aging equipment with a more reliable, efficient source based on BNL designs to improve beam current and operational stability.

Contribution

It introduces a new ion source design for FNAL's injector upgrade, leveraging BNL technology to enhance reliability and performance.

Findings

Achieved >60mA H- beam current

Designed for 15Hz repetition rate and 100s pulse width

Expected to improve operational reliability

Abstract

Currently there is a Proposed FNAL 750keV Injector Upgrade for the replacement of the 40 year old Fermi National Laboratory (FNAL) Cockcroft-Walton accelerators with a new ion source and 200MHz Radio Frequency Quadruple (RFQ). The slit type magnetron being used now will be replaced with a round aperture magnetron similar to the one used at Brookhaven National Lab (BNL). Operational experience from BNL has shown that this type of source is more reliable with a longer lifetime due to better power efficiency. The current source development effort is to produce a reliable source with >60mA of H- beam current, 15Hz rep-rate, 100s pulse width, and a duty factor of 0.15%. The source will be based on the BNL design along with development done at FNAL for the High Intensity Neutrino Source (HINS).