title: Development of the front end test stand and vessel for extraction and source plasma analyses negative hydrogen ion sources at the Rutherford Appleton Laboratory.
abstract: The ISIS pulsed spallation neutron and muon facility at the Rutherford Appleton Laboratory (RAL) in the UK uses a Penning surface plasma negative hydrogen ion source. Upgrade options for the ISIS accelerator system demand a higher current, lower emittance beam with longer pulse lengths from the injector. The Front End Test Stand is being constructed at RAL to meet the upgrade requirements using a modified ISIS ion source. A new 10% duty cycle 25 kV pulsed extraction power supply has been commissioned and the first meter of 3 MeV radio frequency quadrupole has been delivered. Simultaneously, a Vessel for Extraction and Source Plasma Analyses is under construction in a new laboratory at RAL. The detailed measurements of the plasma and extracted beam characteristics will allow a radical overhaul of the transport optics, potentially yielding a simpler source configuration with greater output and lifetime.
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: S R
authors.initials: SR
authors.lastname: Lawrie
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: D C
authors.initials: DC
authors.lastname: Faircloth
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: A P
authors.initials: AP
authors.lastname: Letchford
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Perkins
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: M O
authors.initials: MO
authors.lastname: Whitehead
authors.affiliation: STFC ISIS Pulsed Spallation Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: T
authors.initials: T
authors.lastname: Wood
authors.affiliation: ASTeC Intense Beams Group, Rutherford Appleton Laboratory, Harwell Oxford, Harwell, United Kingdom.
authors.forename: C
authors.initials: C
authors.lastname: Gabor
authors.affiliation: High Energy Physics Department, University of Warwick, Coventry, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Back